HEMISPHERX BIOPHARMA INC
S-1, 1996-07-26
DRUGS, PROPRIETARIES & DRUGGISTS' SUNDRIES
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           As filed with the Securities and Exchange Commission on July 26, 1996
                                                       Registration No. ________

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------
                                    FORM S-1

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                              --------------------

                           HEMISPHERx BIOPHARMA, INC.
                         (Name of Issuer in its charter)

                                    Delaware
         (State or other jurisdiction of incorporation or organization)


            (Primary Standard Industrial Classification Code Number)

                                   52-0845822
                      (I.R.S. Employee Identification No.)

                              --------------------

                               1617 JFK Boulevard
                        Philadelphia, Pennsylvania 19103
                                 (215) 988-0080
          (Address and telephone number of principal executive offices
                        and principal place of business)

                              --------------------

                William A. Carter, M.D., Chief Executive Officer
                           Hemispherx Biopharma, Inc.
                               1617 JFK Boulevard
                        Philadelphia, Pennsylvania 19103
                                 (215) 988-0080
            (Name, address and telephone number of agent for service)
                        Copies of all communications to:

                            Anthony M. Collura, Esq.
                       Silverman, Collura & Chernis, P.C.
                        381 Park Avenue South, Suite 1601
                            New York, New York 10016
                                 (212) 779-8600

     Approximate  date of proposed  sale to the public:  As soon as  practicable
after this Registration Statement becomes effective.

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933 check the following box: [X]

================================================================================

<PAGE>

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
===================================================================================================================================
                                                                       Proposed             Proposed       
           Title of Each Class of               Amount to              Maximum              Maximum             Amount of
        Securities to be Registered          Be Registered(2)       Offering Price     Aggregate Offering    Registration Fee
                                                                     Per Share(1)           Price(1)
===================================================================================================================================

===================================================================================================================================
<S>                                                <C>                   <C>                 <C>                   <C>  
Common Stock, $.001 par value                      2,770                 $2.00               $5,540                $1.91
===================================================================================================================================
Common Stock $.001 par value
underlying Warrants                               890,543                $2.00             $1,781,086             $614.15
===================================================================================================================================
Common Stock $.001 par value                     2,427,275               $2.00             $4,854,550            $1,673.98
underlying Series D Preferred Stock
===================================================================================================================================
TOTAL                                            3,320,588               $2.00             $6,641,176            $2,290.04
===================================================================================================================================
</TABLE>

(1)  Estimated  solely  for  the  purpose  of  calculating  the  amount  of  the
     registration fee pursuant to Rule 457(c).

(2)  Includes such additional  number of shares as may become issuable by reason
     of anti-dilution provisions pursuant to Rule 416.

     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933 or until the  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

                                       ii


<PAGE>

                           HEMISPHERx BIOPHARMA, INC.
                 Cross-Reference Sheet to Prospectus on Form S-1

               Furnished Pursuant to Item 501(b) of Regulation S-K

Item   From S-1 Caption                        Location in Prospectus
- ----   ----------------                        ----------------------

1.     Forepart of the Registration            Outside Front Cover Page
       Statement and Outside Front
       Cover Page of Prospectus

2.     Inside Front and Outside Back Cover     Inside Front Cover Page
       Pages of Prospectus                     Outside Front Cover Page

3.     Summary Information, Risk               Prospectus Summary; Selected 
       Factors and Ratio of Earnings           Financial Data; Risk Factors
       to Fixed Charges

4.     Use of Proceeds                         Use of Proceeds

5.     Determination of Offering Price         Not Applicable

6.     Dilution                                Not Applicable

7.     Selling Security Holders                Resales by Selling Shareholders

8.     Plan of Distribution                    Cover Page; Underwriting;
                                               Resales by Selling Shareholders

9.     Description of Securities               Description of Securities;
       to be Registered                        Shares Eligible for Future Sale

10.    Interest of Named Experts               Experts and Legal Matters
       and Counsel

11.    Information with Respect to             Business; Description of
       the Registrant                          Securities; Financial Statements;
                                               Selected Financial Data;
                                               Management's Discussion
                                               and Analysis of Financial
                                               Condition and Results of
                                               Operations; Certain Transactions;
                                               Management; Price Range of Common
                                               Stock Dividend Policy; 
                                               Principal Shareholders

12.    Disclosure of Commission                Not Applicable
       Position on Indemnification
       for Securities Act Liabilities

                                     iii


<PAGE>

          [TO BE INSERTED ALONG LEFTHAND SIDE OF PROSPECTUS COVER PAGE]

                              [RED HERRING LEGEND]

     Information  contained  herein is subject to  completion  or  amendment.  A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  Prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of any offer to buy nor shall there be any sale of these securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any State.

                                       iv


<PAGE>

                                   PROSPECTUS

                    DATED JULY 26, 1996 SUBJECT TO COMPLETION

                           HEMISPHERx BIOPHARMA, INC.

                          2,770 SHARES OF COMMON STOCK
      2,427,275 SHARES OF COMMON STOCK UNDERLYING SERIES D PREFERRED STOCK

                    890,543 SHARES OF COMMON STOCK UNDERLYING
                         COMMON STOCK PURCHASE WARRANTS

     This Prospectus relates to the possible resale of up to 2,770 shares of the
common stock, $.001 par value (the "Common Stock") of Hemispherx Biopharma, Inc.
(the  "Company")  currently  outstanding,   2,427,275  shares  of  Common  Stock
underlying  the  Company's  Series  D  Preferred  Stock,  $.01  par  value  (the
"Preferred  Stock")  and  up  to  890,543  additional  shares  of  Common  Stock
underlying certain  outstanding Common Stock Purchase Warrants (the "Warrants").
The Warrants  represent the right of the registered holder to purchase one share
of Common Stock at an average weighted exercise price of $4.56.

     The Company  will not receive any  proceeds  from  possible  resales by the
Selling  Securityholders  of their  respective  shares  of  Common  Stock of the
Company.   The  Company  has  agreed  to   indmenify   certain  of  the  Selling
Securityholders against certain liabilities, including certain liabilities under
the Securities Act of 1933, as amended (the "Securities  Act"), or contribute to
payments which such Selling  Securityholders  may be required to make in respect
thereof.  The Company  will  receive  gross  proceeds of up to  $4,064,900  upon
exercise of the  Warrants.  There can be no  assurance  that any of the Warrants
will be exercised.

     The Selling Securityholders may sell their shares of Common Stock from time
to time, in market transactions, in negotiated transactions, through the writing
of options,  or a combination of such methods of sale, at fixed prices which may
be changed,  at market prices  prevailing at the time of sale, at prices related
to  such  prevailing  market  prices  or  at  negotiated   prices.  The  Selling
Securityholders  may effect such  transactions by selling their shares of Common
Stock  to  or  through  broker-dealers,  and  such  broker-dealers  may  receive
compensation  in the form of  discounts,  concessions  or  commissions  from the
Selling Securityholders and/or the purchasers of such shares of Common Stock for
whom  such  broker-dealer  may  act as  agents  or to  whom  they  may  sell  as
principals,  or both (which compensation as to a particular  broker-dealer might
be in excess of  customary  commissions.)  The  Company  has  agreed to bear all
expenses in connection  with the  registration  of the shares of Common Stock to
which this Prospectus relates.

     The Company's Units,  each Unit consisting of one share of Common Stock and
one Class A Redeemable Warrant (the "Unit"), Common Stock and Class A Redeemable
Warrants  (the  "Class A  Warrants")  are quoted on the Nasdaq  SmallCap  Market
System ("Nasdaq") under the symbols HEMXU, HEMX and HEMXW, respectively. On July
23, 1996 the last sale price of the Units,  Common Stock and Class A Warrants as
reported on Nasdaq was $2.625, $2.00 and $.50, respectively.

     THESE  SECURITIES  ARE HIGHLY  SPECULATIVE.  THEY  INVOLVE A HIGH DEGREE OF
RISK. THEY SHOULD BE PURCHASED ONLY BY PERSONS WHO CAN AFFORD TO SUSTAIN A TOTAL
LOSS OF THEIR ENTIRE INVESTMENT (SEE "RISK FACTORS" - PAGE 8)

     THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED BY THE SECURITIES
AND  EXCHANGE  COMMISSION,  OR ANY  STATE  SECURITIES  COMMISSION,  NOR  HAS THE
SECURITIES AND EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION  PASSED
UPON THE  ACCURACY OR ADEQUACY OF THIS  PROSPECTUS.  ANY  REPRESENTATION  TO THE
CONTRARY IS A CRIMINAL OFFENSE.

                  The date of this Prospectus is July 26, 1996


<PAGE>

                             ADDITIONAL INFORMATION

     With respect to the securities  offered hereby,  the Company has filed with
the  principal   office  of  the   Securities  and  Exchange   Commission   (the
"Commission")  in Washington,  D.C., a Registration  Statement on Form S-1 under
the Securities Act. For purposes hereof, the term "Registration Statement" means
the original  Registration  Statement and any and all amendments  thereto.  This
Prospectus does not contain all of the information set forth in the Registration
Statement and the exhibits  thereto,  to which  reference  hereby is made.  Each
statement made in this  Prospectus  concerning a document filed as an exhibit to
the Registration  Statement is not necessarily  complete and is qualified in its
entirety  by  reference  to  such  exhibit  for  a  complete  statement  of  its
provisions.  The  Company is subject to the  informational  requirements  of the
Securities Exchange Act of 1934 (the "Exchange Act") and in accordance therewith
files reports and other  information  with the Commission.  Any interested party
may inspect the  Registration  Statement  and its exhibits and other reports and
information filed by the Company with the Commission without charge, or obtain a
copy of all or any portion thereof, at prescribed rates, at the public reference
facilities of the  Commission at its principal  office at Judiciary  Plaza,  450
Fifth  Street,  N.W.,  Room  1024,  Washington,  D.C.  20549.  The  Registration
Statement  and  exhibits  may also be  inspected  at the  Commission's  regional
offices at  Northwestern  Atrium Center,  500 West Madison  Street,  Suite 1400,
Chicago, Illinois 60661-2511, and at 7 World Trade Center, Suite 1300, New York,
New York 10048.

                                        2


<PAGE>

                               PROSPECTUS SUMMARY

     The  following  summary is qualified  in its entirety by the more  detailed
information  and  the  Consolidated   Financial  Statements  and  Notes  thereto
appearing  elsewhere or incorporated by reference  elsewhere in this Prospectus,
including  information  under "Risk  Factors".  See  "Glossary of Terms" for the
definition of certain terms used in this Prospectus.

                                   THE COMPANY

     Hemispherx   Biopharma,   Inc.  ("HEM"  or  the  "Company")  (formerly  HEM
Pharmaceuticals   Corp.)  is  a   pharmaceutical   company  using  nucleic  acid
technologies to develop therapeutic products for the treatment of viral diseases
and certain cancers. Nucleic acid compounds represent a potentially new class of
pharmaceutical  products that are designed to act at the molecular level for the
treatment of human disease.  The Company's drug  technology  utilizes  specially
configured  ribonucleic  acid ("RNA").  The Company's  double  stranded RNA drug
product,  trademarked Ampligen(R),  which is administered  intravenously,  is in
human clinical  development for various  therapeutic  indications.  Based on the
results of pre-clinical  studies and clinical trials,  the Company believes that
Ampligen may have broad-spectrum anti-viral and anti-cancer activities. Over 300
patients have received  Ampligen in clinical trials  authorized by the U.S. Food
and Drug  Administration  ("FDA") at over twenty clinical trial sites across the
United States, representing the administration of more than 40,000 doses of this
drug.

     Ampligen is being developed clinically for use in treating three anti-viral
indications:  chronic  hepatitis B virus ("HBV")  infection (Phase I/II clinical
trial),  human  immunodeficiency  virus ("HIV") associated disorders (Phase II),
and myalgic encephalomyelitis, also known as chronic fatigue syndrome ("ME/CFS")
(Phase II/III).  The Company's  business strategy is designed around seeking the
required regulatory  approvals which will allow the progressive  introduction of
Ampligen  for HIV  followed  by HBV and ME/CFS in the U.S.,  Canada,  Europe and
Japan. There can be no assurance that Ampligen will receive regulatory  approval
for any of such disorders.  Ampligen has received Orphan Drug  designation  from
the FDA for four  indications  (AIDS,  renal  cell  carcinoma,  chronic  fatigue
syndrome and invasive malignant melanoma), the latter two of which were obtained
in December  1993. The Company is also  developing a second  generation RNA drug
technology,  termed  Oragen  compounds,  which the Company  believes  offers the
potential for broad spectrum antiviral activity by oral administration.

     The  World   Health   Organization   ("WHO")   estimates   that  there  are
approximately  300 million chronic  carriers of HBV worldwide.  More than 40% of
the  persistently  infected  persons  who  survive  to  adulthood  will die from
cirrhosis, hepatocellular carcinoma (liver cancer), or some other consequence of
their  infection.  In the  U.S.  alone,  there  are an  estimated  1.25  million
carriers.  HBV is  one  of  several  viruses  that  cause  human  hepatitis,  or
inflammation of the liver. The Company has been conducting a Phase I/II clinical
trial of Ampligen in the U.S.  for the  treatment  of chronic HBV  infection  at
Stanford University and the University of Pennsylvania.  A significant reduction
in viral  components  and  improvement  in liver  function  was noted during the
course of the Phase I/II clinical  trial to date and the drug has been generally
well tolerated.  At present,  interferon-alpha  is the only approved product for
the treatment of this disease;  however, 60% to 75% of patients with chronic HBV
ultimately fail to respond to  interferon-alpha.  The global sales of interferon
are presently  estimated at more than $1 billion,  largely because of its use in
liver infections.

                                        3


<PAGE>

     The Centers for Disease  Control  ("CDC") has estimated that  approximately
one million  people in the U.S. are infected  with HIV,  excluding  patients who
have progressed to fully  symptomatic  AIDS. The WHO has estimated that 30 to 40
million people will be infected with HIV worldwide by the year 2000. The Company
is in Phase II clinical  testing of Ampligen in the U.S.  for the  treatment  of
symptomatic HIV infection.

     ME/CFS is a condition  recently  recognized by the CDC and characterized by
unexplained  fatigue  or chronic  illness  for six months or longer for which no
cause has been identified after a thorough medical work-up.  Although the CDC is
presently  conducting studies to more exactly determine the rate of incidence of
ME/CFS,  the CDC's latest estimate of the prevalence rate of this disease in the
U.S. is in excess of 200 per 100,000  population.  In November 1992, the Company
received  approval  from  the  Health  Protection  Branch  ("HPB")  of  Canada's
Department of Health and Welfare,  the federal drug regulatory agency in Canada,
to conduct an  open-label  clinical  trial of Ampligen in patients with severely
debilitating  ME/CFS. In this clinical trial, the HPB has authorized the Company
to charge  patients  for the cost of the Ampligen  administered.  The Company is
presently  receiving  limited revenues from sales of Ampligen in Belgium under a
similar cost recovery  program.  The Company has also received  authorization in
1993 from the FDA,  in the U.S.,  and the HPB,  in Canada,  to  initiate a Phase
II/III  clinical  trial of  Ampligen  in patients  with  ME/CFS.  The Company is
unaware of any  investigational  new drugs  which are  currently  at  comparable
stages of clinical development for ME/CFS.

     The Company also has clinical  experience  with  Ampligen in patients  with
certain cancers,  including renal cell carcinoma  (kidney cancer) and metastatic
malignant melanoma.  Based on estimates prepared by the American Cancer Society,
the  Company  anticipates  that  approximately  25,000  new cases of renal  cell
carcinoma  will be  diagnosed  in the U.S.  in 1996.  In March and  June,  1993,
respectively,  the Company was  authorized by the FDA, in the U.S., and the HPB,
in Canada,  to initiate a Phase II/III  clinical trial of Ampligen in renal cell
carcinoma patients. In late 1993, the HPB authorized the Company to proceed with
an open-label clinical trial of Ampligen for renal cell carcinoma in Canada. The
HPB has authorized  the Company to charge  patients for the cost of the Ampligen
administered  in this  clinical  trial.  The  Company  has not  initiated  these
programs  to date  because of  limited  resources  and a shift in the  Company's
clinical  priorities.  The Company  does not believe  that  approvals  for these
studies will be withdrawn as a result of the delay since the approvals  were not
conditioned upon a particular  commencement date. Based on estimates prepared by
the American Cancer Society,  the Company anticipates that approximately  34,000
new cases of malignant melanoma will be diagnosed in the U.S. in 1996. Data from
the American Cancer Society and the World Health Organization indicate that both
the incidence and mortality  from malignant  melanoma are rising  steadily among
white  populations  throughout the world.  In the past decade,  the incidence of
melanoma has  increased  faster than that of any other cancer except lung cancer
in women.

     In November  1995,  the Company  sold  5,313,000  Units  through an initial
public offering. Each Unit consists of one share of Common Stock and one Class A
Warrant.

     In September 1995, the Company entered into an agreement with Rivex Pharma,
Inc., a Canadian-based pharmaceutical company ("Rivex"), pursuant to which Rivex
will provide various  services in connection with the exclusive  distribution of
Ampligen in Canada on an emergency drug release  basis.  Under the terms of this
agreement,  the Company will supply and Rivex will  purchase as much Ampligen as
necessary  to satisfy  Rivex's  customers  at a mutually  agreed  upon cost.  In
return, Rivex will retain the exclusive right to distribute Ampligen in Canada.

                                        4


<PAGE>

     In October  1994,  the Company  entered  into an agreement  with  Bioclones
Proprietary  Limited  ("Bioclones"),   a  biopharmaceutical   company  which  is
associated with The South African  Breweries  Limited ("SAB" and,  together with
Bioclones,  "SAB/Bioclones") with respect to codevelopment of various RNA drugs,
including Ampligen,  for which the Company has previously obtained international
patent  protection.  The licensing  agreement,  as amended (the "SAB Agreement")
provides  that  the  Company  will  provide   SAB/Bioclones  with  an  exclusive
manufacturing  and marketing license for certain Southern  hemisphere  countries
(including  certain  countries in South America) as well as the United  Kingdom,
Ireland,  Africa,  Australia,  Tasmania, New Zealand and certain other countries
and territories.  In exchange for these marketing and distribution  rights,  the
SAB  Agreement  provides  for:  (a) a $3 million  cash  payment to the  Company,
payable in installments upon the occurrence of certain milestones, including the
transfer of certain technical documents which have already been transferred; (b)
the  formation  and  issuance to the Company of 24.9% of the capital  stock of a
company which is developing and operating a new  manufacturing  facility for RNA
drugs  constructed  by  SAB/Bioclones;  and (c)  royalties  on all  sales of the
Company's  product in the  licensed  territories  after the first $50 million of
sales. In addition, SAB/Bioclones has agreed to use reasonable efforts to pursue
the marketing  approval of Ampligen for hepatitis B in Australia,  South Africa,
Brazil,  and the United  Kingdom,  as well as to perform (at its own  expense) a
phase III study of Ampligen  for chronic HBV  infection in South  Africa,  which
clinical  study is to be performed  pursuant to U.S. FDA good clinical  practice
and good laboratory  practice  ("GLP")  guidelines and standards.  SAB/Bioclones
will be  granted  a right of first  refusal  to  manufacture  and  supply to the
Company the drug product  required for not less than one-third of its world-wide
sales of Ampligen (after deducting  SAB/Bioclones-related  sales).  To date, the
Company has received approximately $3,000,000 pursuant to the SAB Agreement.

     In  September  1994,  the Company  formed  three  subsidiaries  and granted
licenses to the  subsidiaries  for the purpose of developing  its technology for
ultimate sale into certain  non-pharmaceutical  specialty consumer markets, such
as the  tobacco  market,  the market for  skincare  products  and the market for
diagnostic  devices.  The  Company  intends  to  issue  equity  in one  of  such
subsidiaries  and has granted  options to certain of its officers and directors.
See  "Business--Subsidiary  Companies."  No  assurance  can be given that any of
these  companies  will be able to complete  testing in these areas,  develop any
products  or  successfully  produce  and market  any  products  in the  targeted
specialty consumer markets.

     The Company's  corporate  headquarters  are located at 1617 JFK  Boulevard,
Philadelphia,  Pennsylvania  19103.  The  Company's  telephone  number  is (215)
988-0080.


                                        5

<PAGE>

As of July 15, 1996

Securities Outstanding(1)(2)(3)(4)     Common Stock                    9,470,675

                                       Series D Preferred Stock            6,000

                                       Units                           6,117,167

Risk Factors                       AN INVESTMENT IN THE SECURITIES OFFERED 
                                   HEREBY INVOLVES A HIGH DEGREE OF RISK. 
                                   SEE "RISK FACTORS".
Nasdaq Symbols
 for the Units                     HEMXU
 for Common Stock                  HEMX
 for Warrants                      HEMXW

(1)  Excludes: (i) 460,798 shares of Common Stock reserved for issuance pursuant
     to the  Company's  1990 Stock  Option Plan under which  options to purchase
     228,502  shares  have been  granted;  (ii)  92,160  shares of Common  Stock
     reserved  for  issuance  pursuant to the  Company's  1992 Stock Option Plan
     under  which no  options  or other  rights  to  purchase  shares  have been
     granted;  (iii)  138,240  shares  of Common  Stock  reserved  for  issuance
     pursuant to the  Company's  1993 Employee  Stock  Purchase Plan pursuant to
     which no rights to purchase  shares have been  granted;  (iv) 556 shares of
     Common Stock  reserved for issuance  pursuant to options  granted  prior to
     1990; (v) 1,663,797  shares of Common Stock reserved for issuance  pursuant
     to certain outstanding  warrants with an average weighted exercise price of
     $3.70;  (vi)  2,080,000  warrants to purchase  Common  Stock of the Company
     issued to officers,  directors and  consultants  of the Company in reliance
     upon Rule 701 of the  Securities  Act of 1933,  as amended,  at an exercise
     price of $3.50 per share (the  "Rule 701  Warrants");  and (vii)  2,750,000
     warrants to purchase  Common Stock at an exercise  price of $1.75 per share
     issued  in  accordance  with  the  terms  of  the  1995  Standby  Financing
     Agreement. See "Management's Discussion and Analysis of Financial Condition
     and Results of Operations,"  "Management--1992  Stock Option Plan," "--1990
     Stock Option Plan" and "--Employee  Stock Purchase  Plan,"  "Description of
     Securities--Warrants"

(2)  Does not  include  195,833  shares of Common  Stock and  1,000,000  Class A
     Redeemable Warrants contained in the Bridge Units issuable upon exercise of
     the Bridgeholder Option issued in connection with the Bridge Loans.

(3)  Does not  include  6,117,167  shares  of  Common  Stock  issuable  upon the
     exercise of the Class A  Redeemable  Warrants  contained in the Units at an
     exercise price of $4.00 per share.

(4)  Does not include  2,427,275  shares of Common  Stock  reserved for issuance
     upon conversion of the Preferred Stock.

(5)  There  can be no  assurance  that  the  Company  will be  able to meet  the
     requirements  for  continued  quotation on Nasdaq or that a trading  market
     will develop or that, if such market develops, it will be sustained.

                                        6


<PAGE>

                          SUMMARY FINANCIAL INFORMATION
                 (in thousands, except share and per share data)

         The  data  set  forth  below  should  be read in  conjunction  with the
Consolidated Financial Statements, related Notes and other financial information
included or incorporated by reference elsewhere in this Prospectus.

<TABLE>
<CAPTION>
                                                                                                              Three Months Ended
                                                             December 31,                                          March 31,
                                   ----------------------------------------------------------------          ---------------------
                                                                                                                  (unaudited)
                                   1991           1992          1993            1994           1995            1995          1996
                                   ----           ----          ----            ----           ----            ----          ----
<S>                              <C>            <C>             <C>            <C>            <C>              <C>            <C>  
Consolidated Statements
of Operations Data:
Revenues
 Research and Development        $  --          $  --           $   48         $    76        $    66          $  11          $  18
 License fee                        --             --             --               100          2,900            750            --  
                                 -------        -------        -------         -------       --------         ------         ------ 
Total Revenues                      --             --               48             176          2,966            761             18
Cost and expenses:
 Research and development          6,181          4,734          2,119           1,638          1,029            258            299
 General and administrative        2,469          2,825          3,347           2,618          2,880            697            514
                                 -------        -------        -------         -------       --------         ------         ------ 
 Total costs and expenses          8,650          7,559          5,466           4,256          3,909            955            813
 Debt conversion expenses           --             --           (1,215)            (10)          (149)          (149)           --  
 Net interest income (expense)       172           (322)        (1,069)           (748)          (243)           122
                                 -------        -------        -------         -------       --------         ------         ------ 
Net loss                         $(8,478)       $(7,881)       $(7,702)        $(5,133)      $ (1,840)        $ (587)        $ (672)
                                 =======        =======        =======         =======       ========         ======         ====== 
Net loss per share               $  --          $ --           $  --           $  (.44)(1)   $   (.13)(1)     $ (.05)(1)     $ (.04)
                                
Weighted average                
 number of shares outstanding   
 used in computing              
 net loss per share                 --            --              --        11,536,276(1)  14,199,701(1)  13,014,174(1)   15,581,592
</TABLE>

                                      December 31, 1995        March 31, 1996   
                                      -----------------        --------------   
Consolidated Balance Sheet Data:                                  (Unaudited)
   Current assets                               $11,354               $3,700
   Current liabilities                            8,279                1,330    
   Total assets                                  12,700                5,079    
   Long-term obligations                              0                    0    
   Accumulated deficit                          (43,544)             (44,216)   
   Stockholders' equity                           4,421                3,749    

(1)  Computed  on a  proforma  basis  described  in  Note 3 to the  Consolidated
     Financial Statements.



                                        7


<PAGE>

                                  RISK FACTORS

     AN  INVESTMENT  IN THE  SECURITIES  OFFERED  HEREBY IS HIGHLY  SPECULATIVE,
INVOLVES  A HIGH  DEGREE OF RISK AND  SHOULD BE MADE ONLY BY  INVESTORS  WHO CAN
AFFORD THE LOSS OF THEIR ENTIRE  INVESTMENT.  PROSPECTIVE  PURCHASERS,  PRIOR TO
MAKING AN  INVESTMENT  DECISION,  SHOULD  CAREFULLY  CONSIDER,  ALONG WITH OTHER
MATTERS REFERRED TO HEREIN, THE FOLLOWING RISK FACTORS:

     Dependence on Ampligen;  Non-Exclusive  Right to  Manufacture  of Ampligen;
Expiration of Patents.

     The  Company's  principal  development  efforts  are  currently  focused on
Ampligen. While most clinical trials of Ampligen have to date produced favorable
results,  additional  trials  sponsored  by  the  Company  are  planned,  and no
assurance can be given that the drug will  ultimately be demonstrated to be safe
or  efficacious.  In addition,  while  Ampligen has been  authorized  for use in
clinical  trials in the United States and other  countries,  no assurance can be
given that additional clinical trials approvals will be authorized in the United
States or in other countries in a timely fashion or at all or that such clinical
trials will be  completed  by the  Company.  The Company has never  commercially
introduced a product,  and no assurance can be given that  commercialization  of
Ampligen in any countries where Ampligen may be approved will prove  successful.
In addition, the Company does not have exclusive rights to manufacture Ampligen.
Competitors  of the Company are  currently  able to  manufacture  Ampligen.  The
Company  believes,  however,  that its  extensive  patent estate may hinder such
competitors  from testing and  developing  Ampligen for  particular  indications
since the Company has patented the use of Ampligen for many disease indications.
The Company further believes that the available market for non-patented  disease
indications  for Ampligen  which might be available  to  competitors  is minimal
since the Company believes,  based on laboratory tests, that Ampligen may not be
effective against such disease indications; however, no assurances can be given.
Willful  infringement of the Company's  patents by a competitor  could result in
significant  monetary damages to the Company in the event that such infringement
was not  enjoined  by a court  of  law.  Nevertheless,  in the  event  that  the
Company's   patent   protection  is  not  adequate  for  all  relevant   disease
indications,  competitors  might  be able to  test,  develop  and  commercialize
Ampligen. Additionally, as a result of the Company's dependence on Ampligen, the
failure to  demonstrate  the  drug's  safety and  efficacy  in planned  clinical
trials, to conduct the planned clinical trials,  to obtain additional  approvals
for the drug or to successfully  commercialize  the drug would have a materially
adverse effect on the Company.

     No Assurance of Regulatory Approval; Government Regulation.

     The Company's research,  preclinical development,  clinical trials, and the
manufacturing and marketing of its products are subject to extensive  regulation
by numerous governmental authorities in the U.S. and other countries, including,
but not limited to, the Food and Drug Administration ("FDA") in the U.S. and the
Health Protection Branch of Canada's Department of Health and Welfare ("HPB"), a
federal  regulatory  agency in Canada.  None of the Company's  products has been
approved for commercial sale by the FDA, the HPB or any other foreign regulatory
authority  and the  Company  does not  expect to achieve  profitable  operations
unless Ampligen  receives FDA approval and is  commercialized  successfully.  In
order to obtain  FDA  approval  of a new drug  product  for an  indication,  the


                                        8


<PAGE>

Company must  demonstrate  to the  satisfaction  of the FDA that such product is
safe and  effective  for its  intended  uses and that the  Company is capable of
manufacturing the product to the applicable regulatory standards. The process of
obtaining FDA and other required  regulatory  approvals  (including those of the
HPB) is rigorous and lengthy and has  required and will  continue to require the
expenditure of substantial resources. There can be no assurance that the Company
will  be able to  obtain  the  necessary  regulatory  approvals.  Unsatisfactory
clinical  trial  results,  clinical  trials not  conducted  in  accordance  with
applicable protocol requirements and/or delays in obtaining regulatory approvals
would  prevent the marketing of products  developed by the Company,  and pending
the receipt of such approvals,  the Company will not receive product revenues or
royalties.

     Pharmaceutical  products  and their  manufacture  are subject to  continued
review following regulatory approval,  and later discovery of previously unknown
problems may result in the imposition of  restrictions on such products or their
manufacture,  including  withdrawal of the products from the market.  Failure to
comply with applicable regulatory requirements could, among other things, result
in  fines,  suspension  of  regulatory  approvals,  operating  restrictions  and
criminal prosecution.  The Company cannot predict the extent to which current or
future  government  regulations  might have a materially  adverse  effect on the
production,  marketing and sale of the Company's products.  Such regulations may
delay or prevent clinical trials,  regulatory  approval,  and the manufacture or
marketing of the Company's potential products. In addition,  such regulation may
impose costly procedures upon the Company's  activities or furnish a competitive
advantage to other  companies more  experienced  in regulatory  affairs than the
Company and may deplete the Company's liquidity and capital resources.

     Additional Financing Requirements.

     The development of the Company's products has required and will continue to
require the  commitment of substantial  resources to conduct the  time-consuming
research,  preclinical  development,  and clinical  trials that are necessary to
bring  pharmaceutical  products  to  market  and  to  establish  commercial-sale
production and marketing capabilities.  Based on its current operating plan, the
Company  anticipates  that  projected  cash flow from  operations  and currently
available  financing  arrangements  will be  sufficient  to meet  the  Company's
capital  requirements  for  approximately  18  months  from  the  date  of  this
Prospectus.  It is not  expected  that the  Company's  current cash flow will be
sufficient  to enable the Company to complete the necessary  clinical  trials or
regulatory  approval  process for  Ampligen for any  indication  or, if any such
approval  were  obtained,  to begin  manufacturing  or  marketing  Ampligen on a
commercial  basis.  Accordingly,  the  Company  may  need to  raise  substantial
additional  funds through  additional  equity or debt  financing,  collaborative
arrangements with corporate partners,  off balance sheet financing or from other
sources in order to complete the necessary  clinical  trials and the  regulatory
approval processes and begin commercializing its products. If adequate funds are
not available from operations, as is anticipated, and if the Company is not able
to secure  additional  sources of financing on acceptable  terms,  the Company's
business will be materially adversely affected.  In addition,  certain officers,
directors and shareholders have entered into a 1995 Standby Financing  Agreement
pursuant to which they have agreed to provide  funding up to  $5,500,000  to the
Company in the event that existing and additional  financing is  insufficient to
cover the cash needs of the Company through December 1, 1996.

     Moreover,  because of the Company's long-term capital requirements,  it may
seek to access the public equity market whenever conditions are favorable,  even
if it does not have an immediate need for additional capital at that time. There

                                        9


<PAGE>

can be no assurance that any additional funding will be available to the Company
on terms acceptable to the Company, if at all. Any additional funding may result
in significant dilution and could involve the issuance of securities with rights
which are senior to those of  existing  stockholders.  The Company may also need
additional funding earlier than anticipated, and the Company's cash requirements
in general may vary  materially from those now planned,  for reasons  including,
but not limited to, changes in the Company's research and development  programs,
clinical trials, competitive and technological advances, the regulatory process,
and higher than anticipated  expenses and lower than  anticipated  revenues from
certain  of the  Company's  clinical  trials  as to  which  cost  recovery  from
participants has been approved.

     Uncertainty Regarding Patents and Proprietary Rights.

     The Company's  success will depend, in large part, on its ability to obtain
patent  protection  for its  products  and to obtain  and  preserve  proprietary
information and trade secrets. The Company does not have exclusive rights to the
manufacture of Ampligen. Consequently, the Company's ability to obtain exclusive
rights  for  the  commercial  sale  of  Ampligen  is  subject  to the  Company's
acquisition of enforceable patents covering the use of the drug for a particular
indication.  The Company has been issued certain  patents on the use of Ampligen
alone and Ampligen in combination  with certain other drugs for the treatment of
human  immunodeficiency virus ("HIV"). The Company has also been issued a patent
on the use of Ampligen in combination with certain other drugs for the treatment
of chronic hepatitis B virus ("HBV") and chronic hepatitis C virus ("HCV") and a
patent which affords  protection on the use of Ampligen in patients with myalgic
encephalomyetis,  also know as chronic fatigue syndrome ("ME/CFS"). To date, the
Company has not been  issued any patents in the U.S.  for the use of Ampligen as
monotherapy  for HBV or for any of the  cancers  which the Company has sought to
target.  The Company's  applications for U.S. patents for the use of Ampligen as
monotherapy for HBV and in the treatment of renal cell carcinoma and lung cancer
are  currently  pending,  although no  assurances  can be given that any of such
applications will be approved.  No assurances can be given that competitors will
not seek and obtain patents  regarding the use of Ampligen in  combination  with
various other agents (including AZT) for a particular target indication prior to
the  Company.   Although  the  Company's  license  to  manufacture  Ampligen  is
non-exclusive,  the  Company  believes  that  the  existence  of  the  Company's
treatment indication patents precludes a competitor from selling an identical or
similar product for the same treatment  indication  without  infringing upon the
Company's issued patents. No assurance can be given, however, that the Company's
patent  protection  will be  adequate  to  prevent  the entry into the market of
competitors for all of the Company's treatment indications.

     The Company has been unable to secure Orphan Drug  designation from the FDA
for  treatment  of HBV in the U.S.  In the event  that the  Company is unable to
obtain  adequate  patent  protection for the  indication,  it would be unable to
maintain a competitive advantage over other drug manufacturers which could enter
the market immediately.

     The patent position of  biotechnology  and  pharmaceutical  firms is highly
uncertain  and  involves  complex  legal  and  factual  questions.  To date,  no
consistent  policy has emerged  regarding the breadth of protection  afforded by
pharmaceutical and biotechnology patents. Accordingly, there can be no assurance
that patent  applications  relating to the Company's products or technology will
result in patents  being  issued or that,  if issued,  such  patents will afford
meaningful  protection  against  competitors  with  similar  technology.  It  is
generally  anticipated that there may be significant  litigation in the industry

                                       10


<PAGE>

regarding patent and other intellectual property rights and that such litigation
could consume  substantial  resources of the Company.  No assurance can be given
that the Company's patents will provide competitive  advantages for its products
or will not be successfully  challenged or circumvented by its  competitors.  No
assurance  can be given that  patents  do not exist or could not be filed  which
would have a materially  adverse  effect on the Company's  ability to market its
products  or to obtain or  maintain  any  competitive  position  the Company may
achieve with respect to its products. The Company's patents also may not prevent
others from  developing  competitive  products using related  technology.  Other
companies obtaining patents covering products or processes useful to the Company
may bring  infringement  actions against the Company.  There can be no assurance
that the Company will have the financial  resources  necessary to enforce patent
rights it may hold. As a result,  the Company may be required to obtain licenses
from  others to develop,  manufacture  or market its  products.  There can be no
assurance  that  the  Company  would be able to  obtain  any  such  licenses  on
commercially  reasonable  terms, if at all. The Company licenses certain patents
and  proprietary  information  from third  parties,  some of which  patents  and
proprietary  information  may have been developed with  government  grants under
circumstances where the government maintained certain rights with respect to the
patents/information  developed.  No  assurances  can be given  that  such  third
parties will adequately  enforce any rights they may have or that the rights, if
any,  retained  by the  government  will not  adversely  affect the value of the
Company's  license.  Certain of the  Company's  know-how and  technology  is not
patentable,  particularly  the procedures  for the  manufacture of the Company's
drug product  which are carried out  according to standard  operating  procedure
manuals.  To protect its rights,  the Company has since 1991 required  employees
and consultants to enter into confidentiality agreements with the Company. There
can be no assurance that these agreements will not be breached, that the Company
would have adequate and enforceable  remedies for any breach,  or that any trade
secrets of the  Company  will not  otherwise  become  known or be  independently
developed by competitors.

     Disputes and Legal Proceedings Related to Patent Rights.

     The  Company's  ownership of one of its patents for the use of Ampligen for
the  treatment  of HIV is the subject of a dispute.  Vanderbilt  University  has
advised the Company of its position that  employees of the  University  were the
inventors of the patent at issue.  The Company does not believe the University's
position to have merit, and if the University filed a claim against the Company,
the Company would vigorously defend against such an action. If such a claim were
filed and if such a claim  were found to have  merit,  the loss of the patent at
issue would not have a materially  adverse  effect on the  Company's  long range
business  since  the  University  would  be able to limit  or  prevent  only the
Company's  use of Ampligen in  combination  with AZT in the treatment of HIV. In
the event that the University  obtained  ownership of the disputed  patent,  the
University  could  license  a third  entity  to  sell  Ampligen  for a  specific
combinational  treatment.  However,  without the Company's consent,  the Company
believes  that the  commercialization  process by a third  party  would  require
substantial   expenditure  to  repeat   clinical  trials  and  establish  a  new
manufacturing  protocol  acceptable to  regulatory  agencies and would require a
license  from  the  Company  for  the  use of  Ampligen  as a  component  of the
combinational requirement. Furthermore, the loss of this patent would not affect
the  Company's  ability  to  market  Ampligen  as a  monotherapy  for HIV  which
treatment the Company has tested and expects to continue to develop.

     In July 1994, Temple  University  advised the Company that it was in breach
of a certain  licensing  agreement  for certain  ribonucleic  acid  ("RNA") drug

                                       11


<PAGE>

compounds  termed  Oragen   compounds  at  the  preclinical   stage  of  product
development.  In November 1994, in an action captioned HEM Pharmaceuticals Corp.
v. Temple University of the Commonwealth System of Higher Education, the Company
filed suit against  Temple in the Superior  Court of the State of Delaware,  New
Castle County  seeking a declaratory  judgment that the licensing  agreement was
unlawfully terminated by Temple and remains in full force and effect and seeking
monetary  damages  estimated to be in excess of $10 million for Temple's alleged
breach of its  obligations  of good faith and fair dealing and certain  terms of
the  Temple  Agreement.  In January  1995,  Temple  filed a separate  litigation
against the Company in the Court of Common Pleas of Philadelphia  County seeking
declaratory  judgment that the Temple  Agreement  was lawfully  terminated as of
July 1, 1994,  together with an award of costs,  including  attorney  fees.  The
Court of Common Pleas has stayed further  proceedings in that litigation pending
the outcome of the  Company's  Superior  Court case. If the Company were to lose
its claim,  the  Company  would lose its  investment  to date in certain  Oragen
compounds  acquired  pursuant to the Temple  Agreement.  While not yet tested on
humans these Oragen  compounds have the potential and  theoretical  advantage of
having an  Ampligen-like  effect upon oral  administration.  No assurance can be
given that as a result of such loss,  Temple or its new licensee,  if any, would
not become  competitors of the Company or that the  termination of the licensing
agreement will not have a materially  adverse effect on the Company's long range
business or financial condition.

     History of Losses; Future Profitability Uncertain.

     The Company began  operations in 1966 and has reported net profit only from
1985 through 1987.  Since 1987, the Company has incurred  substantial  operating
losses  and  as of  March  31,  1996,  the  Company's  accumulated  deficit  was
approximately $44 million.  The Company has not generated  significant  revenues
from its products and could incur substantial and increased losses over the next
several years. Such losses may fluctuate  significantly from quarter to quarter.
There  can be no  assurance  that the  Company  will  ever  achieve  significant
revenues  from product  sales or become  profitable.  The  Company's  ability to
achieve  profitable  operations  is dependent,  in large part,  on  successfully
developing  products,  obtaining  regulatory  approvals on a timely  basis,  and
making the transition  from a research and  development  firm to an organization
producing commercial products or entering into joint ventures or other licensing
arrangements.  No assurance can be given that the Company's product  development
efforts will be successfully  completed,  required regulatory  approvals will be
obtained,  any  products  will be  manufactured  and marketed  successfully,  or
profitability will be achieved.

     No Assurance of Successful Product Development.

     The  development of new  pharmaceutical  products is subject to a number of
significant  risks.  Potential  products that appear to be promising at an early
stage of  research  or  development  may not  reach the  market  for a number of
reasons.  Potential  products may be found to be  ineffective or to have adverse
side effects, fail to receive necessary regulatory  clearances,  be difficult to
manufacture on a commercial  scale,  be  uneconomical  to market or be precluded
from  commercialization  by proprietary  rights of third parties.  The Company's
products are in various stages of clinical and  pre-clinical  development;  each
will  need  to  progress   through  further  clinical  studies  and  appropriate
regulatory approval processes before any such products can be marketed. Ampligen
is not expected to be generally available for commercial sale for any indication
for at  least  the  next  several  years,  if at  all.  Generally,  only a small
percentage of potential  therapeutic products are eventually approved by the FDA
for commercial sale. The transition from limited  production of pre-clinical and

                                       12


<PAGE>

clinical  research  quantities to  production  of  commercial  quantities of the
Company's products will involve distinct management and technical challenges and
will require  additional  management and technical  personnel and capital to the
extent  such  manufacturing  is not  handled by third  parties.  There can be no
assurance  that the  Company's  efforts  will be  successful  or that any  given
product  will  be  determined  to  be  safe  and  effective,  capable  of  being
manufactured economically in commercial quantities or successfully marketed.

     Limited Manufacturing Experience and Capacity.

     Ampligen is currently  produced only in limited  quantities  for use in its
clinical trials. To be successful,  the Company's  products must be manufactured
in commercial  quantities  in compliance  with  regulatory  requirements  and at
acceptable  costs.  Although  the  Company has entered  into an  agreement  with
Bioclones Proprietary, Ltd. ("Bioclones"),  a biopharmaceutical company which is
associated  with  South  African  Breweries,   Ltd.  (together  with  Bioclones,
"SAB")(the  "SAB  Agreement")  which  provides  for  the  construction  of a new
commercial  manufacturing  facility  by a  company  which is 24.9%  owned by the
Company,  no assurance can be given as to the timing of such  construction,  and
therefore  the  Company  may  continue to be  dependent  on third  parties for a
considerable  portion  of the  manufacturing  and  production  process.  A pilot
facility  in South  Africa is being  expanded  to  provide  a limited  supply of
Ampligen raw  material.  While the Company  believes  that  construction  of the
commercial  facility will begin in 1997, the  construction is dependent upon the
regulatory status of Ampligen in various global markets, and no assurance can be
given with respect to when, and if,  construction  will occur. To the extent the
Company is involved in the production process,  the Company's current facilities
are not adequate for the  production  of its proposed  products for  large-scale
commercialization, and the Company currently does not have adequate personnel to
conduct   commercial-scale   manufacturing.   The  Company  intends  to  utilize
third-party facilities if and when the need arises or, if it is unable to do so,
to build or acquire commercial-scale  manufacturing facilities. The Company will
need to comply with regulatory requirements for such facilities, including those
of  the  FDA  and  HPB  pertaining  to  Good  Manufacturing   Practices  ("GMP")
regulations.  There can be no assurance that such facilities can be used, built,
or acquired on commercially  acceptable  terms,  that such facilities,  if used,
built,  or  acquired,  will be  adequate  for  the  Company's  long-term  needs.
Moreover,  there is no  assurance  that  successful  manufacture  of a drug on a
limited scale basis for investigational use will lead to a successful transition
to commercial,  large-scale production.  Small changes in methods of manufacture
may affect the chemical  structure of Ampligen and other such RNA drugs, as well
as their  safety and  efficacy.  Changes in  methods of  manufacture,  including
commercial scale-up,  can, among other things,  require new clinical studies and
affect orphan drug status,  particularly,  market  exclusivity  rights,  if any,
under the Orphan Drug Act.

     Lack of Marketing Experience and Capacity.

     The Company  currently has limited  marketing or sales  capability and does
not expect to establish a significant  direct sales  capability for at least the
next several years. To the extent that the Company determines not, or is unable,
to enter into marketing  agreements or third party  distribution  agreements for
its products,  significant  additional  resources  will be required to develop a
sales force and distribution  organization.  Pursuant to the SAB Agreement,  the
corporate  partner will be  responsible  for fielding an adequate sales force in
South America, Africa, United Kingdom, Australia and New Zealand.  Nevertheless,
there  can be no  assurance  that the  Company  will be able to  establish  such


                                       13


<PAGE>

arrangements,  under the SAB Agreement or otherwise,  on terms acceptable to the
Company,  if at all, or that the cost of establishing such arrangements will not
exceed any product revenues,  or that such  arrangements will be successful.  To
the  extent  that the  Company  enters  into  co-marketing  or  other  licensing
arrangements,  any  revenues  received by the Company  will be  dependent on the
efforts of third  parties,  and there can be no assurance that such efforts will
be successful.

     Rapid Technological Change and Substantial Competition.

     The  pharmaceutical  and biotechnology  industries are subject to rapid and
substantial technological change.  Technological competition from pharmaceutical
and  biotechnology  companies,  universities,  governmental  entities and others
diversifying  into the field is intense  and is expected  to  increase.  Most of
these entities have significantly greater research and development  capabilities
than the Company,  as well as  substantial  marketing,  financial and managerial
resources,  and represent significant  competition for the Company.  Acquisition
of, or investments in,  competing  companies by large  pharmaceutical  companies
could increase such competitors' financial, marketing and other resources. There
can be no assurance  that  developments  by others will not render the Company's
products or technologies  obsolete or noncompetitive or that the Company will be
able to keep pace with technological developments. Competitors have developed or
are in the process of developing technologies that are, or in the future may be,
the basis for competitive products.  Some of these products may have an entirely
different  approach or means of  accomplishing  similar  therapeutic  effects to
products being developed by the Company.  These  competing  products may be more
effective and less costly than the Company's products. In addition, conventional
drug therapy,  surgery and other more familiar treatments will offer competition
to the Company's products.  Furthermore,  many of the Company's competitors have
significantly  greater  experience than the Company in pre-clinical  testing and
human clinical trials of  pharmaceutical  products and in obtaining FDA, HPB and
other regulatory approvals of products.  Accordingly,  the Company's competitors
may succeed in  obtaining  FDA and HPB product  approvals  more rapidly than the
Company.  If any of the Company's products receive regulatory  approvals for any
indication and the Company commences  commercial sales of its products,  it will
also be  competing  with  respect  to  manufacturing  efficiency  and  marketing
capabilities, areas in which it has no experience. The Company's competitors may
possess or obtain patent protection or other  intellectual  property rights that
prevent, limit or otherwise adversely affect the Company's ability to develop or
exploit its products.

     Dependence upon Qualified and Key Personnel.

     Because of the specialized nature of the Company's business,  the Company's
success will depend,  among other  things,  on its ability to attract and retain
qualified management and scientific personnel. Competition for such personnel is
intense.  There can be no assurance that the Company will be able to continue to
attract or retain such persons.  The Company currently depends upon the services
of Dr. William A. Carter, its President, Chief Executive Officer and Chairman of
the Board,  Robert E.  Peterson,  its Chief  Financial  Officer and Dr. Carol A.
Smith, the Company's Director of Manufacturing and Process Development.  Certain
key  individuals  upon whom the Company  currently  depends,  including  but not
limited to the Company's Medical Director,  Dr. David Strayer, are not employees
of the  Company,  but  instead are  employees  of an  institution  with whom the
Company  has a  collaborative  at will  arrangement.  R.  Douglas  Hulse,  Chief
Operating  Officer,  is an employee of The Sage Group and serves in his position
under a written agreement.  In addition,  Dr. Smith and Mr. Peterson do not have


                                       14


<PAGE>

written employment  agreements with the Company.  The continued  availability to
the Company of the services of these  individuals  is subject to the policies of
the  institution  which  employs  them;  any change in such policies may have an
adverse effect upon the Company's  continued  retention of the services of these
individuals.  While the Company has an employment  agreement with Dr. William A.
Carter,  and has secured key man life  insurance  in the amount of $2 million on
the life of Dr. Carter,  the loss of Dr. Carter or other key personnel or of the
services of such employees of collaborators or the failure to recruit additional
personnel  as needed  could have a materially  adverse  effect on the  Company's
ability to achieve its objectives.

     Dependence on Third Parties.

     The Company's strategy for research,  development and  commercialization is
to  rely  in  part  upon  collaborative   arrangements  with  third  parties  in
appropriate  circumstances.  The  Company's  strategy  has led it to enter  into
various arrangements with universities,  research groups,  licensors and others.
The  Company  is  dependent  on a number of  important  arrangements  with third
parties.  In particular,  the Company  utilizes the services of employees of and
regularly makes use of certain equipment and facilities at Hahnemann  University
and has obtained certain of its technology for Oragen products through a license
with Temple  University,  which  agreement is alleged by Temple to be terminated
and which is the subject of a suit filed by the Company in November 1994.  There
can be no assurance that the Company will be able to negotiate  additional third
party arrangements or continue any existing  arrangements on terms acceptable to
the  Company,  if at all,  or that key  researchers  upon  whom the  Company  is
dependent will continue to be associated with such  universities  and/or to work
on the  Company's  products.  The loss of any such existing  arrangement  or key
researcher  could have a materially  adverse effect on the Company.  The Company
may  seek  a  significant  portion  of  its  future  capital  requirements  from
arrangements  with  pharmaceutical  companies or others pursuant to arrangements
under which,  among other things,  the Company would receive payment for certain
research and  development  activities in exchange for future  royalty  payments.
There can be no assurance  that any such  arrangements  will be established on a
basis  acceptable  to  the  Company,  if at  all,  or if  established,  will  be
scientifically  or  commercially   successful.   The  failure  to  achieve  such
arrangements on satisfactory terms could have a materially adverse effect on the
Company.  The Company is dependent  upon certain  third party  suppliers for key
components of its proposed  products and for substantially all of the production
process. The failure to continue  arrangements with such third parties or obtain
satisfactory  substitute  arrangements could have a materially adverse effect on
the Company.

     Impact of  Potential  Nasdaq  Delisting  on  Marketability  of  Securities;
Broker-Dealer Sales of the Company's Units.

     The Company's  Units,  Common Stock and Warrants trade on Nasdaq.  The NASD
has rules which  establish  criteria  for the initial and  continued  listing of
securities on Nasdaq.  Under the rules for initial listing,  a company must have
at least $4,000,000 in total assets, at least $2,000,000 in total  stockholders'
equity,  and a minimum bid price of $3.00 per share.  For  continued  listing on
Nasdaq,  a company must maintain at least  $2,000,000 in total assets,  at least
$1,000,000 in shareholders'  equity, and a minimum bid price of $1.00 per share.
The  Company  currently  has  approximately   $5,079,000  in  total  assets  and
approximately $3,750,000 in total shareholders' equity.

                                       15


<PAGE>

     If the  Company  were to continue to incur  operating  losses,  it might be
unable to maintain the standards for continued listing and the listed securities
could be subject to  delisting  from Nasdaq.  If the  Company's  securities  are
delisted,  trading in the delisted  securities  could thereafter be conducted on
the NASD Bulletin  Board or in the  over-the-counter  market in what is commonly
referred to as the "pink sheets." If this were to occur,  an investor would find
it more difficult to dispose of the Company's  securities or to obtain  accurate
quotations  as to the price of the  Company's  securities  and it could  have an
adverse effect on the coverage of news concerning the Company.  In addition,  if
the Company's  securities  were  delisted,  they would be subject to a rule that
imposes  additional sales practice  requirements on broker-dealers who sell such
securities to persons other than established  customers and accredited investors
(accredited  investors  are  generally  persons  having  net  worth in excess of
$1,000,000  or annual income  exceeding  $200,000,  or $300,000  together with a
spouse).  For transactions  covered by this rule, the broker-dealer  must make a
special  suitability  determination for the purchaser and must have received the
purchaser's  written  consent  to the  transaction  prior  to  sale,  as well as
disclosing  certain  information  concerning the risks of purchasing  low-priced
securities on the market for such  securities.  Consequently,  delisting,  if it
occurred,  would  adversely  affect the  ability of  broker-dealers  to sell the
Company's securities and would make subsequent financing more difficult.

     In order for the Company's securities to be included for trading on Nasdaq,
there must exist market makers and specialists, respectively, to support trading
in such securities. As of the date of this Prospectus,  several brokerage firms,
sufficient  to satisfy the  requirements  of Nasdaq are engaged in market making
activities with respect to the securities. There is no obligation on the part of
the brokerage  firm to continue to act as market  makers.  In the event that the
market makers and specialists  cease to function as such,  public trading in the
securities will be adversely affected or may cease entirely.

     Product Liability Exposure.

     The  Company  faces  an  inherent  business  risk of  exposure  to  product
liability  claims in the event that the use of its  products  results in adverse
effects.  Such  liability  might  result from claims made  directly by patients,
hospitals,  clinics or other consumers, or by pharmaceutical companies or others
manufacturing  such  products on behalf of the  Company.  While the Company will
continue to attempt to take appropriate  precautions,  there can be no assurance
that it will avoid significant product liability exposure.  The Company does not
currently  maintain any product liability  insurance  coverage;  accordingly,  a
significant  uninsured  risk exists  with  respect to product  liability  claims
arising out of the Company's human clinical trials.  The Company plans to obtain
product liability insurance coverage for its product distribution in Canada .

     Uncertainty of Health Care Reimbursement and Potential Legislation.

     The  Company's  ability to  successfully  commercialize  its products  will
depend,  in part,  on the  extent  to which  reimbursement  for the cost of such
products  and  related  treatment  will  be  available  from  government  health
administration   authorities,   private  health  coverage   insurers  and  other
organizations.  Significant uncertainty exists as to the reimbursement status of
newly  approved  health  care  products,  and from time to time  legislation  is
proposed which, if adopted,  could further restrict the prices charged by and/or
amounts  reimbursable to manufacturers of pharmaceutical  products.  The Company
cannot  predict  what,  if any,  legislation  will  ultimately be adopted or the


                                       16


<PAGE>

impact  of  such  legislation  on the  Company.  Reimbursement  from  government
agencies may become more restricted in the future.  The Company also understands
that there is  increasing  political  pressure  in Canada to limit  health  care
costs; no assurances can be given that the legislative or regulatory results, if
any,  of  such  pressure  will  not  have  an  adverse  impact  on the  Company.
Furthermore, there can be no assurance that third party insurance companies will
allow the Company to charge and receive payments for its products  sufficient to
realize an  appropriate  return on its  investment in product  development.  The
Company's  potential products  represent a new mode of therapy,  and the Company
expects that the costs associated with purchasing and administering its products
will be  substantial.  There can be no  assurance  that the  Company's  proposed
products,  if  successfully  developed,  will be  considered  cost  effective to
third-party payors, that reimbursement will be available or, if available,  that
the timing and amount of such payors'  reimbursement  will not adversely  affect
the Company's ability to sell its products on a profitable basis.

     Legal Proceedings

     In February 1991, Vanderbilt University advised the Company of its position
that University  employees were the inventors of an issued U.S. patent regarding
the use of Ampligen in combination with various other agents (including AZT) for
the  treatment  of HIV  infection.  See  Risk  Factors  -  "Disputes  and  Legal
Proceedings Related to Patent Rights".

     The Company is the  plaintiff in an action  captioned  HEM  Pharmaceuticals
Corp. v. Temple University of the Commonwealth  System of Higher  Education,  in
which the Company is seeking a declaratory judgment that the Company's licensing
agreement with Temple University was unlawfully terminated by Temple. Temple has
filed a motion to dismiss  this  lawsuit  upon the  grounds of lack of  personal
jurisdiction  and forum non conviens.  In January 1995,  Temple filed a separate
litigation  against the Company  seeking  declaratory  judgment  that the Temple
Agreement was lawfully  terminated as of July 1, 1994, together with an award of
costs,  including  attorney  fees.  See  Risk  Factors  -  "Disputes  and  Legal
Proceedings Related to Patent Rights".

     While the Company intends to vigorously  prosecute or defend against all of
the  litigation  described  above,  no assurance can be given as to the ultimate
outcome or the Company's  costs in bringing or defending  this  litigation,  and
with regard to the Temple litigation,  no assurance can be given that an outcome
adverse  to the  Company  will  not  have a  materially  adverse  effect  on the
Company's business or financial condition.

     Hazardous Materials.

     The Company's business involves the controlled use of hazardous  materials,
carcinogenic chemicals and various radioactive  compounds.  Although the Company
believes that its safety procedures for handling and disposing of such materials
comply in all material  respects  with the  standards  prescribed  by applicable
regulations, the risk of accidental contamination or injury from these materials
cannot be completely eliminated. In the event of such an accident or the failure
to comply with applicable regulations,  the Company could be held liable for any
damages that result,  and any such liability could be  significant.  The Company
does not maintain  insurance  coverage against such liabilities.  The Company is
also  subject  to a variety of laws and  regulations  relating  to  occupational


                                       17


<PAGE>

health and safety,  environmental  protection,  hazardous substance control, and
waste  management  and  disposal.  The  failure  to  comply  with  any  of  such
regulations could subject the Company to, among other things, third party damage
claims, civil penalties and criminal liability.

     Control  of  the  Company  by  Certain  Officers,   Directors  and  Current
Stockholders.

     The  officers,  directors  and  current  5%  stockholders  of  the  Company
beneficially own approximately  32.5% of the outstanding shares of Common Stock.
Pursuant to certain irrevocable  proxies,  Dr. William A. Carter,  President and
Chief  Executive  Officer of the  Company,  has the power to control the vote of
21.1% of the  outstanding  shares of Common Stock. As a result of such ownership
or voting  power  these  persons,  should  they  vote as a bloc,  may be able to
effectively  control all matters  requiring  approval by the stockholders of the
Company, including the election of directors.

     Possible Volatility of Stock Price.

     The stock market in general and biotechnology and pharmaceutical  stocks in
particular  have  from time to time  experienced  significant  price and  volume
fluctuations  that may be unrelated to the operating  performance  of particular
companies.  The market  price of the  Securities,  like the stock prices of many
publicly  traded  biotechnology  and smaller  pharmaceutical  companies,  may be
highly volatile. Announcements of technological innovations,  regulatory matters
or new commercial  products by the Company or its  competitors,  developments or
disputes concerning patent or proprietary rights,  publicity regarding actual or
potential  medical results relating to products under development by the Company
or its  competitors,  regulatory  developments  in both  the  U.S.  and  foreign
countries,  public concern as to the safety of pharmaceutical products, economic
and other  external  factors,  and  period-to-period  fluctuations  in financial
results, may have a significant impact on the market price of the Securities.

     Shares Eligible for Future Sale; Registration Rights.

     Of the 15,587,842  (32,750,313 upon the exercise of the outstanding Class A
Warrants,  other  Warrants,  stock options and  conversion  of Preferred  Stock)
shares of Common Stock issued and  outstanding as of the date of this Prospectus
a significant number of such shares are "restricted  securities" as that term is
defined under Rule 144 promulgated  under the Securities Act. William A. Carter,
the Company's President, Chief Executive Officer and Chairman, has agreed not to
sell or transfer his securities for a period of 36 months  following  commencing
November 2, 1995. The  purchasers of the Bridge Loans who hold the  Bridgeholder
Options and the holder of 5,898 shares of Common Stock have agreed (with certain
exceptions)  not to sell or transfer their  securities for a period of 13 months
commencing  November  2, 1995.  The  Tisch/Tsai  Entities  have  agreed with the
Company (with  certain  exceptions  including  the transfer to immediate  family
members or related  entities)  not to sell or transfer  their  securities  for a
period of 18 months  commencing  November 2, 1995. In addition,  Canaan  Venture
Limited  Partnership and Canaan Venture Offshore  Limited  Partnership C.V. (the
"Canaan Entities"),  Michael Dubilier,  a principal  stockholder of the Company,
and three other stockholders  holding an aggregate of 1,253,227 shares of Common
Stock have agreed not to sell or transfer  their  securities  for a period of 18
months  commencing  November  2, 1995.  These  agreements  are  subject to early
termination  in the event of the early release of other  securityholders  of the
Company from

                                       18


<PAGE>

lock-up agreements by the Company. The holders of the remainder of the Company's
securities are subject to agreements with the Company which prohibit the sale or
transfer of such  securities  for a period of 24 months  commencing  November 2,
1995,  without the Company's  consent ("Lock Up Agreements").  As of October 25,
1995,  the holders of  approximately  10% of the  Company's  securities  had not
executed  lock up  agreements.  The  restricted  securities  may be sold without
registration pursuant to Rule 144, under certain circumstances. In addition, the
Company has issued  warrants to purchase  2,080,000  shares of Common Stock (the
"Rule  701  Warrants")  in  reliance  upon  the  provisions  of Rule  701 of the
Securities  Act,  pursuant  to which,  in certain  circumstances,  such Rule 701
Warrants  may be sold.  The holders of these  securities  are subject to Lock Up
Agreements with the Company for a period of 24 months. The sale, or availability
for sale,  of  substantial  amounts of the  Company's  securities  in the public
market  subsequent to this  Prospectus,  including the securities  held by those
stockholders  who  have  not  executed  24-month  Lock  Up  Agreements  and  the
Securities  issued pursuant to Rule 144, Rule 701 or otherwise,  could adversely
affect  the  market  price of the Common  Stock and could  impair the  Company's
ability to raise additional capital through the sale of its equity securities or
debt  financing.  The  availability  of Rule 144 and Rule 701 to the  holders of
restricted  securities  of the  Company  would be  conditioned  on,  among other
factors, the availability of certain public information concerning the Company.

     Adverse  Consequences  Associated with  Substantial  Shares of Common Stock
Reserved for Issuance Pursuant to Outstanding  Warrants,  Options and Conversion
of the Preferred Stock.

     The Company has reserved an aggregate of up to 17,162,407  shares of Common
Stock for  issuance  upon  exercise  of the Class A  Warrants,  Warrants,  stock
options and upon conversion of the Preferred  Stock.  Holders of these Warrants,
options and Preferred Stock are likely to exercise and convert them when, in all
likelihood,  the Company could obtain additional capital on terms more favorable
than those  provided  by such  convertible  securities.  Furthermore,  while the
convertible  securities are outstanding,  they may adversely affect the terms on
which the Company could obtain additional capital.  Should a significant portion
of such  convertible  securities  be exercised,  the  resulting  increase in the
amount of the Common Stock in the public  market may have the effect of reducing
the market price thereof.

     Conflicts of Interest.

     All of the members of the Company's  Scientific Advisory Board are employed
other than by the Company and may have  commitments to or consulting or advisory
contracts  with other  entities  (which may include  competitors of the Company)
that may limit  their  availability  to the  Company.  While each  member of the
Company's   Scientific   Advisory  Board  does  execute  a  non-disclosure   and
non-competition  agreement  with  respect  to  proprietary  data  that he or she
receives from the Company,  there can be no assurance that these agreements will
absolutely  protect  the Company  from the results of such data being  revealed,
accidentally or otherwise, by a member of its Scientific Advisory Board.

     Absence of Dividends.

     The Company intends to retain future earnings, if any, to provide funds for
the operations of its business and, accordingly,  does not anticipate paying any
dividends on its Common Stock in the reasonably foreseeable future.

                                       19


<PAGE>

                                 CAPITALIZATION

     The following table sets forth the  capitalization  of the Company at March
31,  1996.  This  table  should  be read in  conjunction  with the  Consolidated
Financial Statements and related Notes appearing elsewhere in this Prospectus.

                                                                  March 31, 1996
                                                                  --------------
                                                (in thousands except share data)
                                                                     (unaudited)

Notes Payable and Stockholder Loans
(including accrued related interest)                                 $     0    
Stockholders' equity (deficit):
Common Stock, $.001 par value, 
   50,000,000 shares authorized;
15,587,592 issued and outstanding                                         16
Additional paid-in capital                                            47,949
Accumulated deficit                                                  (44,216)
Total stockholders' equity                                             3,749
Total capitalization                                                   3,749


(1)  Assumes no exercise of (i) outstanding  options to purchase an aggregate of
     228,502 shares of Common Stock or of options to purchase  392,624 shares of
     Common  Stock which may be granted  under the  Company's  stock  option and
     stock  purchase  plans;  (ii)  outstanding  warrants to purchase  shares of
     Common Stock and Bridgeholders  Options to purchase Bridge Units consisting
     of  195,833  shares  of  Common  Stock  and  1,000,000  Class A  Redeemable
     Warrants;  or (iii) 5,313,000 Class A Redeemable  Warrants  included in the
     Units;  (iv) other  Warrants to purchase  Common Stock  totaling  6,493,797
     shares;  or (v)  1,504,000  Warrants to  purchase  Common  Stock  issued in
     connection  with  the  Company's   initial  public  offering   ("IPO")  and
     subsequent  financing.  See "Manage- ment--1990 Stock Option Plan," "--1992
     Stock Option Plan" and "--Employee  Stock Purchase Plan,"  "Descriptions of
     Securities--Class A Redeemable Warrants".

                                       20


<PAGE>

                             SELECTED FINANCIAL DATA
                 (in thousands, except share and per share data)

     The  selected  financial  data  should  be read  in  conjunction  with  the
Consolidated  Financial Statements as of December 31, 1995 and 1994 and for each
of the years in the three year period ended December 31, 1995, the related notes
and the independent auditors' report. The consolidated  statements of operations
data for the  years  ended  December  31,  1991 and 1992,  and the  consolidated
balance sheet data at December 31, 1991,  1992 and 1993 are derived from audited
Consolidated  Financial  Statements  not included in this  Prospectus.  Selected
financial  data for the three  months  ended March 31, 1995 and 1996 are derived
from unaudited  condensed  consolidated  financial  statements  included in this
Prospectus.  The unaudited condensed consolidated  financial statements,  in the
opinion of management,  include all adjustments,  consisting of normal recurring
adjustments,  which the  Company  considers  necessary  to  present  fairly  the
financial  position  of the  Company  at  March  31,  1996  and the  results  of
operations  and cash flows for the three  months  ended March 31, 1995 and 1996.
The  results of  operations  for the three  months  ended March 31, 1996 are not
necessarily  indicative of results that may be expected for the full fiscal year
ending December 31, 1996.

<TABLE>
<CAPTION>
                                                                                                             Three Months Ended
                                                          December 31,                                             March 31,
                                    ----------------------------------------------------------               -------------------
                                                                                                                  (unaudited)
                                    1991       1992         1993          1994            1995               1995           1996
                                    ----       ----         ----          ----            ----               ----           ----
<S>                              <C>          <C>         <C>           <C>             <C>                <C>           <C>    
Consolidated Statements             
of Operations Data:
 Revenues
  Research and Development       $  --        $   --      $    48       $     76        $     66           $   11         $    18
  License fee                       --            --         --              100           2,900              750            -- 
                                 -------      -------     -------       --------        --------           ------         ------- 
 Total Revenues                     --           --            48            176           2,966              761              18
 Cost and expenses:
  Research and development         6,181        4,734       2,119          1,638           1,029              258             299
  General and administrative       2,469        2,825       3,347          2,618           2,880              697             514
                                 -------      -------     -------       --------        --------           ------         ------- 
  Total costs and expenses         8,650        7,559       5,466          4,256           3,909              955             813
  Debt conversion expenses          --           --        (1,215)           (10)           (149)            (149)          -- 
 Net interest income (expense)       172         (322)     (1,069)        (1,043)           (748)            (243)            122
                                 -------      -------     -------       --------        --------           ------         ------- 
 Net loss                        $(8,478)     $(7,881)    $(7,702)      $ (5,133)       $ (1,840)          $ (587)        $  (672)
                                 =======      =======     =======       ========        ========           ======         ======= 
 Net loss per share              $   --       $   --      $  --            $(.44)(1)       $(.13)(1)        $(.05)(1)     $  (.04)
 Weighted average               
  number of shares outstanding
  used in computing
  net loss per share(1)             --            --          --      11,536,276(1)   14,199,701(1)    13,014,174(1)   15,581,592

</TABLE>

(1)  Computed  on a  proforma  basis  described  in  Note 3 to the  Consolidated
     Financial Statements.


                                       21

<PAGE>

<TABLE>
<CAPTION>
                                                             December 31,                                                 March 31,
                                         ----------------------------------------------------------------------           ---------
                                                            (In Thousands)                                               (Unaudited)
                                         1991            1992             1993             1994            1995             1996
                                         ----            ----             ----             ----            ----             ----
<S>                                   <C>              <C>              <C>              <C>              <C>              <C>     
Consolidated Balance
 Sheet Data:
Current assets                        $  1,316         $  2,282         $      6         $     64         $ 11,354         $  3,700
Current liabilities                      1,714            2,750           10,599           13,043            8,279            1,330
Total assets                             3,190            4,415            1,916            1,651           12,700            5,079
Long-term obligations                      112            6,950               30             --               --               --
Redeemable preferred stock               2,000            2,536            2,866            3,238             --               --
Accumulated deficit                    (20,988)         (28,869)         (36,571)         (41,704)         (43,544)         (44,216)
Stockholders' equity (deficit)        $   (637)        $ (7,821)        $(11,579)        $(14,630)        $  4,421         $  3,749
</TABLE>




                                       22


<PAGE>

                           PRICE RANGE OF COMMON STOCK

     The  Company's  Units,  Common Stock and Class A Warrants are traded on the
National Association of Securities Dealers Automated Quotation System ("NASDAQ")
under the symbols HEMXU, HEMX and HEMXW, respectively.  The following table sets
forth the high and low bid  prices  for the  Company's  Units,  for the  periods
indicated  as reported by the NASDAQ.  The  Company's  Common  Stock and Class A
Warrants  were listed for trading on NASDAQ on July 12, 1996.  On July 23, 1996,
the  high  and  low  bid  price  for the  Common  Stock  was  $2.00  and  $2.00,
respectively.  The high and low bid price for the Class A Warrants  on such date
was $.5625 and $.50, respectively.  The high and low bid price for the Units was
$2.6875 and $2.625, respectively

                                      UNITS

1995                                       High                      Low
- ----                                       ----                      ---
         Quarter ended 12/31               8 1/2                     2

1996
- ----
         Quarter ended 3/31                3 9/16                    1 1/2
         Quarter ended 6/30                6                         2 11/16


     On May 15,  1996,  there were  approximately  331  holders of record of the
Company's  Common  Stock.  The number of record  holders do not include  holders
whose securities are held in street name.

                                    DIVIDENDS

     The Company does not currently  pay  dividends on its Common  Stock.  It is
management's  intention not to declare or pay dividends on the Common Stock, but
to retain  earnings,  if any, for the  operation  and expansion of the Company's
business.

     The  holders  of its Series D  Preferred  Shares  are  entitled  to certain
dividend payments upon declaration by the Company's Board.

                                 USE OF PROCEEDS

     The Company  intends to utilize the proceeds  received from the exercise of
the 890,543  Warrants,  estimated to be $4,064,900 if all Warrants are exercised
in full, for general  corporate and working  capital  purposes.  There can be no
assurance that any of the Warrants will be exercised.  The foregoing  represents
the Company's  best estimate of its use of proceeds  generated from the possible
exercise of Warrants  based upon the current  state of its business  operations,
its current plans and current economic and industry  conditions.  Any changes in
the use of  proceeds  will  be  made at the  sole  discretion  of the  Board  of
Directors of the Company.

                                       23


<PAGE>

                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS

     The following  discussion and analysis  should be read in conjunction  with
the Consolidated  Financial  Statements and related notes contained elsewhere in
this Prospectus.

GENERAL

     Hemispherx Biopharma, Inc. and subsidiaries (the "Company"), formerly known
as HEM  Pharmaceuticals  Corp., is a  pharmaceutical  company using nucleic acid
technologies to develop therapeutic products for the treatment of viral diseases
and certain  cancers.  The Company's drug technology  uses  specially-configured
ribonucleic  acid  (RNA).  the  Company's  double-  stranded  RNA drug  product,
trademarked  Ampligen,  is in human clinical development for various therapeutic
indications.  The efficacy and safety of Ampligen is being developed  clinically
for three  anti-viral  indications:  myalgic  encephalomyelitis,  also  known as
chronic fatigue  syndrome  (ME/CFS)(Phase  II clinical trial completed and Phase
II/III  clinical trial  authorized);  human  immunodeficiency  virus  associated
disorders (Phase II clinical trial  authorized);  and chronic  hepatitis B virus
infection  (HBV)(Phase  I/II  clinical  trial in process).  The Company also has
clinical  experience  with Ampligen in patients with certain  cancers  including
renal cell carcinoma (kidney cancer) and metastatic malignant melanoma.

     The Consolidated  Financial  Statements include the financial statements of
Hemispherx  Biopharma,  Inc.  and its three  wholly-owned  subsidiaries,  BioPro
Corp.,  BioAegean  Corp.  and Core  BioTech  Corp.  which were  incorporated  in
September  1994 for the purpose of developing  technology for ultimate sale into
certain   non-pharmaceutical   specialty   consumer  markets.   All  significant
intercompany balances and transactions have been eliminated in consolidation.

     Since fiscal 1994 , the Company has focused on  negotiating  and  executing
the South African Breweries (SAB) Agreement, exploring potential partnerships to
pursue  additional  clinical  trials  with  special  emphasis on the HBV disease
indication,  restructuring  certain of its outstanding debt, conducting the 1994
Common Stock  Financing  and the Bridge  Financing and preparing for its Initial
Public  Offering  ("IPO").  In 1996 and beyond,  the Company expects to add some
additional  personnel to augment its general and  administrative  activities  in
support of  increased  efforts for  research  and  development,  production  and
regulatory activity.

     The Company  expects to continue its research and clinical  efforts for the
next several  years with some  benefit of certain  revenues  from cost  recovery
programs,  notably in Canada and Belgium.  Beginning in October,  1993,  limited
revenues were initiated in Belgium from sales under the cost recovery  provision
for  conducting  clinical  tests in  ME/CFS.  Overall,  the  Company  expects to
continue  incurring  losses over the next  several  years due to clinical  costs
which are only partially  offset by revenues and potential  licensing fees. Such
losses may fluctuate  from quarter to quarter as a result of  differences in the
timing of  significant  expenses  incurred and receipt of licensing  fees and/or
revenues.

                                       24


<PAGE>

Result of Operations

Three months ended March 31, 1996 versus the three months ended March 31, 1995

     The Company reported a net loss of $671,759 for the quarter ended March 31,
1996 versus a net loss of $586,647 for the same period in 1995.  Several factors
contributed to the increase in net loss of $85,112.

     Revenues  were down  $742,946  for the quarter  ended March 31, 1996 as the
results for the quarter ended March 31, 1995 include  $750,000 of licensing fees
recorded in connection with  SAB/Bioclones  agreement.  Research and development
costs  increased by $40,880 in the quarter ended March 31, 1996 due primarily to
increased  efforts on the Canadian and Belgium  clinical  programs.  General and
administrative  expenses of $513,813  in the first  quarter of 1996  reflect the
benefit  of a one  time  gain in the  amount  of  $318,757  resulting  from  the
forgiveness of certain lease obligations in connection with the restructuring of
the Company's principal office lease.  Excluding this one time gain, general and
administrative expense in the first quarter of 1996 exceeded related expenses in
the first  quarter of 1995 by  $134,976.  This  increase  can be  attributed  to
consulting fees,  public  relations,  printing expenses and director and officer
insurance  premiums.  Most of which are associated with the  administration of a
public company.

     Debt conversion costs of $149,384 and interest expense of $245,984 incurred
in the  first  quarter  of 1995 did not  recur in 1996 due the fact that all the
associated debt was converted or repaid in 1995.  Interest  income  increased by
$119,565 in the first  quarter of 1996 due to the earnings on the  remaining IPO
proceeds.

Years Ended December 31, 1995 versus 1994

     The Company  reported  revenues of  $2,965,910  in 1995 versus  $175,758 in
1994. In 1995, the Company received and recognized  $2,900,000 in licensing fees
resulting  from the  SAB/Bioclones  agreements  as compared to $100,000 in 1994.
Revenues from cost recovery  clinical trials were $65,910 in 1995 versus $75,758
in 1994.  Net  losses of  $1,839,840  were  incurred  in 1995  versus  losses of
$5,133,051  in  1994.  The  year to year  improvement  of  $3,293,211  basically
consists of: (1)  $2,790,152 in higher  revenues  primarily due to the licensing
fees received from the SAB Agreement,  (2) $609,107 or 37% in lower research and
development costs as a result of the winddown and completion of certain clinical
trials, (3) higher general and administrative costs of $262,681 or 10% basically
due to increased  legal and  professional  fees  associated  with various  legal
matters and the  Company's IPO efforts,  (4) $138,884 in higher debt  conversion
expense relating to certain debt  restructuring  that took place in April, 1995,
and (5) lower net  interest  expense in the amount of $295,517 or 28% due to the
paydown of certain notes from the proceeds of the IPO.

Years ended December 31, 1994 versus 1993

     In 1994, the Company's net loss was $5,133,051 as compared to a net loss of
$7,702,050 in 1993. The $2,568,999  improvement resulted from increased revenues
of $127,758, reduced research and development costs of $481,127, reduced general
and administrative  costs of $729,714,  reduced conversion expense of $1,204,000
and reduced net interest expense of $26,400.

     The Company had  revenues of $48,000 in 1993  compared to $175,758 in 1994.
In 1994 the Company  received  $100,000 in licensing fees in accordance with the

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<PAGE>

terms  of the SAB  Agreement.  Additionally,  cost  recovery  revenues  from the
Belgium clinical trials increased by approximately  $29,000.  Operating expenses
declined  22% in 1994 as  compared  to 1993,  primarily  as a result of  reduced
research  costs  and  efforts  to  correspondingly   downsize  the  general  and
administrative  costs.  Research and development  costs declined $481,000 or 23%
primarily due to the completion of certain  clinical trial efforts.  General and
administrative  expenses declined  approximately  $730,000 or 22% as a result of
restructuring and downsizing the Company's  overhead to support the needs of the
Company and reduced research and development activity. This restructuring in the
fall of 1993 produced lower wages and salaries,  telephone  expense,  travel and
other  expenses  in  1994.  In  addition,  in 1993  the  Company  incurred  debt
conversion  expenses of $1,214,500 as a result of the conversion of certain debt
to equity.

Liquidity and Capital Resources

     Cash and cash  equivalents  at March 31,  1996 was  $3,620,343  compared to
$11,291,167  at December  31,  1995.  The  December  31,  1995  amount  included
$5,818,733  of restricted  cash as ordered by the Court in  connection  with the
Cohn litigation. In February 1996, the Company agreed to repay the Cohn note and
settle  the  Cohn  litigation.   In  exchange  for  mutual  releases  and  other
consideration,  the Company paid Mr. Cohn  $6,450,000  on March 21,  1996.  This
figure  includes  $4,920,000  in principal  and  $1,530,000  for legal and other
costs.  The  Company  retired  much  of  the  outstanding  vendor  and  supplier
obligations  from the  proceeds  from the SAB  Agreement,  the  Bridge  Loan and
revenue  from sales  under the cost  recovery  programs.  In  addition,  certain
officers,  directors  and  shareholders  have  entered  into  the  1995  Standby
Financing  Agreement pursuant to which they have agreed to provide funding up to
$5,500,000 to the Company in the event that existing and additional financing is
insufficient  to cover the cash needs of the Company  through  December 31, 1996
Moreover,  because of the Company's long-term capital requirements,  it may seek
to access the public equity market whenever conditions are favorable, even if it
does not have an  immediate  need  for  additional  capital  at that  time.  Any
additional  funding may result in  significant  dilution  and could  involve the
issuance  of  securities  with  rights  which are  senior  to those of  existing
stockholders.  The  Company  may  also  need  additional  funding  earlier  than
anticipated,  and the Company's cash requirements in general may vary materially
from those now planned,  for reasons  including,  but not limited to, changes in
the Company's research and development  programs,  clinical trials,  competitive
and technological  advances, the regulatory process, and higher than anticipated
expenses  and lower than  anticipated  revenues  form  certain of the  Company's
clinical trials as to which cost recovery from participants has been approved.

         The Company has financed its operations since January 1, 1992 primarily
through the IPO,  private  placement  of equity and debt  securities,  equipment
lease  financing  interest  income,  and  revenues  from  licensing  and royalty
agreements.  Net cash  provided by  financing  activities  from  January 1, 1992
through  March 31, 1996  totaled  $29.7  million,  including  approximately  $16
million in net proceeds  from the IPO,  $3.3  million in net  proceeds  from the
private placement of Common Stock and Preferred Stock and $10.6 million from the
private placement of debt securities and warrants.  Since December 31, 1993, the
Company has raised  approximately  $20.2 million in the form of debt securities,
warrants,  and the sale of stock.  $16 million of the $20.2 million raised since
December 31, 1993 represents  approximate net proceeds from the IPO in which the
Company sold 5,313,000  Units,  each consisting of one share of Common Stock and
one  Class  A  Warrant.   See  "Certain   Transactions"   and   "Description  of
Securities--Class A Redeemable Warrants."

         In February 1995, the Company entered into a settlement  agreement with
the  Tisch/Tsai  Entities to  restructure  the December  1992 and February  1993

                                       26


<PAGE>

promissory  notes in the aggregate  principal  amount of  $2,400,000  and settle
certain  threatened claims made by the Tisch/Tsai  Entities against the Company.
This  debt  restructuring  consisted  of (i) the  repayment  by the  Company  of
$1,200,000 in principal,  (ii) the issuance of replacement  Tisch/Tsai  Notes in
the aggregate  principal  amount of $600,000 to the  Tisch/Tsai  Entities  which
notes were  retired on November  2, 1995,  (iii) the  conversion  of $600,000 of
principal into 172,414  shares of Series C Preferred  Stock at the rate of $3.48
per share,  (iv) the amendment and  restatement  of certain  warrants  issued in
connection  with the original notes in order to increase the number of shares of
stock  issuable  thereunder  by 64,000  shares and to provide  for  warrants  to
purchase a total of 144,000 shares of Common Stock at an exercise price of $2.00
per share,  which warrants are exercisable  until December 31, 1997, and (v) the
release by all parties of any claims.  The  replacement  notes were secured by a
pledge  of  stock by the  Company's  President,  Chairman  and  Chief  Executive
Officer.  The Company may have been in default of the Tisch/Tsai  Notes due to a
possible default under certain other notes payable by the Company.  Because such
other notes have been  extended,  the Company does not believe that any claim of
default  can be made under the  Tisch/Tsai  Notes.  See "Risk  Factors--Possible
Default on Certain Debt."

     In March 1995, the Company issued a promissory note to Gerald A. Brauser in
the  amount  of  $200,000,  bearing  interest  at a rate  of 12% per  year  (the
"Original  Brauser  Note").  In connection  with the Original  Brauser Note, the
Company agreed to pay attorney fees and miscellaneous  expenses of approximately
$12,000.  In connection  with the Original  Brauser Note,  the Company  issued a
warrant to purchase 50,000 shares of Common Stock at a price of $1.75 per share.
The Original Brauser Note was  collateralized by the Company and Bridge Ventures
with the Company's  patent  estate.  In May 1995, the Company  restructured  the
Original  Brauser Note in exchange for the Company  issuing to Mr. Brauser (i) a
promissory note, collateralized by the Company's patent estate, in the amount of
$100,000  bearing  interest at a rate of 12% per year (the "New Brauser  Note"),
(ii) a warrant to purchase 25,000 shares of Common Stock at a price of $1.75 per
share, (iii) 100,000 shares of Common Stock at $.50 per share, and (iv) a Bridge
Loan in the  amount of  $50,000  as well as a  Bridgeholder  Option to  purchase
33,333 Bridge Units.  The New Brauser Note was  originally due on the earlier of
June 30, 1995 or the Company's  receipt of a certain payment from  SAB/Bioclones
but has been amended to extend the date on which repayment is due to the earlier
of  November  2, 1995 or the  closing  of the IPO.  The notes  were  retired  on
November 2, 1995.

     As of March 31, 1996, the Company's cash on hand was $3,620,000  which does
not include  $5,475,000  received  after March 31, 1996 in  connection  with the
private  placement of Series D Preferred  Stock.  At March 31, 1996, the Company
had  accounts   payable  and  accrued  current   liabilities  of   approximately
$1,330,400.

     Net  cash  used  by  the  Company  for  operating  activities  amounted  to
approximately  $5,170,638 in 1993,  $1,952,145  in 1994,  $1,939,219 in 1995 and
$2,655,215 for the three months ended March 31, 1996.

     The Company has incurred and will  continue to incur  substantial  research
and  development  costs and  manufacturing  costs.  In addition,  if the Company
receives  regulatory  clearance for the  commercial  sale of its  products,  the
Company will incur substantial expenditures to develop its manufacturing, sales,
marketing and  distribution  capabilities  to the extent such  functions are not
supplied by third parties. The Company will require substantial additional funds
for  these  purposes   through   additional   equity  and/or  debt   financings,
collaborative  arrangements  with corporate  partners or from other sources.  No
assurances  can be given that such  additional  funds will be available  for the
Company to finance its  development on acceptable  terms, if at all. If adequate

                                       27


<PAGE>

funds are not available  from  additional  sources of  financing,  the Company's
business will be materially  adversely  affected and the Company may not be able
to continue operations. "See Business--Company Strategy" and "Risk Factors."

     The  Company's  future  capital  requirements  will depend on many factors,
including  scientific  progress in its research,  drug discovery and development
programs,   the  magnitude  of  these  programs,   the  length  and  expense  of
pre-clinical  and  clinical  trials,  the time and  costs  involved  in  seeking
regulatory  approvals,  the costs involved in filing,  prosecuting and enforcing
patent claims,  competing technological and market developments,  changes in the
existing  collaborative  research  relationships,  the ability of the Company to
establish product development  arrangements,  the cost of manufacturing scale-up
and effective commercialization activities and arrangements.  The failure by the
Company  to  obtain  regulatory  approval  for any  product  will  preclude  its
commercialization. There can be no assurance that necessary regulatory approvals
will be obtained. See "Risk Factors" and "Business--Government Regulation."

     Pursuant to the terms of the SAB  Agreement,  the  Company has  received an
aggregate of $3,000,000 through July 10, 1996.

New Accounting Pronouncements

     In March 1995,  the  Financial  Accounting  Standards  Board (FASB)  issued
Statement  of  Financial  Accounting  Standards  No.  121  "Accounting  for  the
Impairment of  Long-Lived  Assets and for  Long-Lived  Assets to be Disposed Of"
(Statement 121). Statement 121 provides guidance for recognition and measurement
of  impairment  of  long-lived  assets,  certain  identifiable  intangibles  and
goodwill  related  both to assets to be held and used and assets to be  disposed
of. The Company is required to adopt  Statement 121 for the year ended  December
31, 1996. The Company has not yet quantified the impact, if any, of the adoption
of Statement 121 may have on its consolidated financial statements.

     In October 1995, the FASB issued Statement 123, "Accounting for Stock-Based
Compensation"  (Statement  123).  Statement  123 allows  companies the option to
retain the current accounting method for recognizing  stock-based expense in the
financial  statements or to adopt a new accounting method based on the estimated
fair value of employee stock  options.  Companies that do not adopt the new fair
value  based  method will be required  to provide  expanded  disclosures  in the
footnotes.  The Company is required  to adopt  Statement  123 for the year ended
December  31,  1996.  The  Company  expects to  continue  applying  its  current
accounting   method  and  upon  adoption  will  present  the  required  footnote
disclosures.

                                       28


<PAGE>

                                    BUSINESS

General

     The Company is a pharmaceutical  company using nucleic acid technologies to
develop  therapeutic  products for the  treatment of viral  diseases and certain
cancers.   Nucleic   acid   compounds   represent  a  potential   new  class  of
pharmaceutical  products that are designed to act at the molecular level for the
treatment  of  human   disease.   The   Company's   drug   technology   utilizes
specially-configured  RNA.  The  Company's  double  stranded  RNA drug  product,
trademarked Ampligen, which is administered intravenously,  is in human clinical
development  for  various  therapeutic  indications.  Based  on the  results  of
pre-clinical studies and clinical trials, the Company believes that Ampligen may
have  broad-spectrum  anti-viral and anti-cancer  activities.  Over 300 patients
have received  Ampligen in clinical trials  authorized by the FDA at over twenty
clinical trial sites across the United States,  representing the  administration
of more than 40,000 doses of this drug.

     Ampligen is being developed  clinically for three  anti-viral  indications:
HBV (Phase I/II clinical trial), HIV associated disorders (Phase II), and ME/CFS
(Phase II/III).  The Company's  business strategy is designed around seeking the
required regulatory  approvals which will allow the progressive  introduction of
Ampligen  for HIV  followed  by HBV and ME/CFS in the U.S.,  Canada,  Europe and
Japan. There can be no assurance that Ampligen will receive regulatory  approval
for any of such disorders.  Ampligen has received Orphan Drug  designation  from
the FDA for four  indications  (AIDS,  renal  cell  carcinoma,  chronic  fatigue
syndrome  and invasive  malignant  melanoma).  The Company is also  developing a
second generation RNA drug technology,  termed Oragen compounds,  with potential
for broad spectrum antiviral activity by oral administration.

     The Company has been issued  certain  patents on the use of Ampligen  alone
and Ampligen in combination  with certain other drugs,  including AZT, ddI, ddC,
interferon  and/or  IL-2,  for the  treatment  of HIV. The Company has also been
issued a patent on the use of Ampligen in combination  with certain other drugs,
including  ddI and  ganciclovir,  for the  treatment of HBV and HCV and a patent
which affords  protection on the use of Ampligen in patients with ME/CFS.  While
the Company does not have any ownership rights to these other drugs,  such drugs
may be readily  purchased for  combinational  treatment  regimens and thus,  the
Company believes that the lack of such ownership rights will not have a material
adverse effect on the Company;  however, no assurance can be given. To date, the
Company  has not  been  issued  any  patents  in the U.S.  regarding  the use of
Ampligen for  treatment  of the cancers  which the Company has sought to target.
The Company's applications for such patents are currently pending; no assurances
can be given  that such  applications  will be  allowed.  See  "Business--Patent
Rights."

     The WHO estimates that there are approximately 300 million chronic carriers
of HBV worldwide. More than 40% of the persistently infected persons who survive
to adulthood will die from cirrhosis,  hepatocellular  carcinoma (liver cancer),
or some other  consequence  of their  infection.  In the U.S. alone there are an
estimated 1.25 million  carriers.  HBV is one of the several  viruses that cause
human  hepatitis  or  inflammation  of  the  liver.  The  Company  is  presently
conducting a Phase I/II clinical trial of Ampligen in the U.S. for the treatment
of  chronic  HBV  infection  at  Stanford   University  and  the  University  of
Pennsylvania.  A significant  reduction in viral  components and  improvement in
liver  function  has been  noted  during the course of the study to date and the
drug has been generally well tolerated. At present, interferon-alpha is the only

                                       29


<PAGE>

approved product for this disease;  however,  approximately 75% of patients with
chronic HBV ultimately fail to respond to interferon-alpha.  The global sales of
interferon are presently  estimated at more than $1 billion,  largely because of
its use in liver infections.

     The CDC has estimated that approximately one million people in the U.S. are
infected with HIV,  excluding  patients who have progressed to fully symptomatic
AIDS.  The WHO has estimated  that 30 to 40 million people will be infected with
HIV worldwide by the year 2000. The Company is presently in Phase II of clinical
development  of  Ampligen  in the U.S.  for the  treatment  of  symptomatic  HIV
infection.

     ME/CFS is a condition  recently  recognized by the CDC and characterized by
unexplained  fatigue  or chronic  illness  for six months or longer for which no
cause has been identified after a thorough medical work-up.  Although the CDC is
presently  conducting studies to determine more exactly the rate of incidence of
ME/CFS,  the CDC's latest estimate of the prevalence rate of this disease in the
U.S. is in excess of 200 per 100,000  population.  In November 1992, the Company
received approval from the HPB of Canada's Department of Health and Welfare, the
federal drug  regulatory  agency in Canada,  to conduct an  open-label  clinical
trial of  Ampligen  in  patients  with  severely  debilitating  ME/CFS.  In this
clinical  trial,  the HPB has authorized the Company to charge  patients for the
cost of the Ampligen  administered.  The Company is presently  receiving limited
revenues  from sales in  Belgium  under a similar  cost  recovery  program.  The
Company has also received  authorization from the FDA, in the U.S., and the HPB,
in Canada,  to initiate a Phase  II/III  clinical  trial of Ampligen in patients
with ME/CFS. The Company is unaware of any  investigational  new drugs which are
currently at comparable stages of clinical development for ME/CFS.

     The Company also has clinical  experience  with  Ampligen in patients  with
certain cancers,  including renal cell carcinoma  (kidney cancer) and metastatic
malignant melanoma.  Based on estimates prepared by the American Cancer Society,
the  Company  anticipates  that  approximately  25,000  new cases of renal  cell
carcinoma  will be  diagnosed  in the U.S.  in 1996.  In March and  June,  1993,
respectively,  the Company was  authorized by the FDA, in the U.S., and the HPB,
in Canada,  to initiate a Phase II/III  clinical trial of Ampligen in renal cell
carcinoma patients.  Recently, the HPB authorized the Company to proceed with an
open-label  clinical trial of Ampligen for renal cell  carcinoma in Canada.  The
HPB has authorized  the Company to charge  patients for the cost of the Ampligen
administered in this clinical trial. Based on estimates prepared by the American
Cancer Society, the Company also anticipates that approximately 34,000 new cases
of  malignant  melanoma  will be  diagnosed  in the U.S. in 1996.  Data from the
American Cancer Society and the World Health Organization indicate that both the
incidence and mortality from malignant  melanoma are rising steadily among white
populations  throughout the world. In the past decade, the incidence of melanoma
has increased faster than that of any other cancer except lung cancer in women.

     From its  inception in 1966 to the early  1980s,  the  Company's  principal
business was to supply research support via contracts received  principally from
the  NIH.  In the  early  1980s,  the  Company  redirected  its  efforts  to the
development  of nucleic acid  pharmaceutical  technology and since that time the
Company has devoted  substantially  all of its resources to its  research,  drug
discovery and development programs.

     In October 1994, the Company entered into the SAB Agreement with respect to
codevelopment of various RNA drugs,  including  Ampligen,  for which the Company
has previously obtained international patent protection.  The SAB Agreement,  as
amended,  provides that the Company will provide SAB/Bioclones with an exclusive

                                       30


<PAGE>

manufacturing  and marketing license for certain Southern  hemisphere  countries
(including  certain  countries in South America) as well as the United  Kingdom,
Ireland, Africa,  Australia,  Tasmania, New Zealand, and certain other countries
and territories.  In exchange for these marketing and distribution  rights,  the
SAB  Agreement  provides  for:  (a) a $3 million  cash  payment to the  Company,
payable in installments upon the occurrence of certain milestones  including the
transfer  of  certain  technical  documents,  some of which  have  already  been
transferred;  (b) the  formation  and  issuance  to the  Company of 24.9% of the
capital  stock of a  company  which  is shall  developing  and  operating  a new
manufacturing  facility  for RNA drugs  constructed  by  SAB/Bioclones,  and (c)
royalties on all sales of the  Company's  products in the  licensed  territories
after the first $50 million of sales. In addition,  SAB/Bioclones  agrees to use
its best  efforts  to pursue  the  marketing  approval  of  Ampligen  for HBV in
Australia,  South Africa,  Brazil, and the United Kingdom, as well as to perform
(at its own  expense) a phase III study of Ampligen in chronic HBV  infection in
South Africa,  which clinical study is to be performed pursuant to U.S. FDA good
clinical  practice  and  good  laboratory  practice  guidelines  and  standards.
SAB/Bioclones will be granted a right of first refusal to manufacture and supply
to the Company the drug  product  required  for not less than  one-third  of its
world-wide  sales of Ampligen  (after  deducting  SAB/Bioclones-related  sales).
According  to its most recent  annual  report,  SAB is a  multinational  holding
company  investing in and taking  management  responsibility  for a portfolio of
business in beer and beverages retailing,  hotels and the manufacture of certain
mass market  consumer goods,  together with strategic  investments in businesses
which support its  mainstream  interests.  As of July 10, 1996,  the Company had
received $3,000,000 pursuant to the SAB Agreement.

Nucleic Acid Pharmaceuticals

     The Company  believes that nucleic acid  compounds  represent a potentially
new class of  pharmaceutical  products that are designed to act at the molecular
level for the treatment of human  disease.  There are two forms of nucleic acid:
deoxyribonucleic  acid ("DNA") and RNA.  DNA is a group of  naturally  occurring
molecules found in chromosomes,  the cell's genetic machinery. RNA is a group of
naturally occurring  informational molecules which orchestrate a cell's behavior
and which  regulate  the action of groups of cells,  including  the cells  which
comprise the body's immune  system.  RNA directs the  production of proteins and
regulates certain cell activities  including the activation of otherwise dormant
cellular  defenses against viruses and tumors.  To date, the Company has focused
its efforts on developing two classes of RNA  pharmaceuticals,  Ampligen, a high
molecular  weight double stranded  intravenous  drug, and Oragen,  low molecular
weight double or single stranded drugs intended for oral administration.

Company Strategy

     The Company's  business  strategy is designed  around  seeking the required
regulatory  approvals which will allow the progressive  introduction of Ampligen
for HIV followed by HBV and ME/CFS in the U.S., Canada, Europe and Japan and the
Southern hemisphere countries including South Africa, Australia and countries in
South  America.  Within the next year,  the Company  expects to receive  limited
revenues through  cost-recovery  from patients who become enrolled in a clinical
trial of Ampligen for severely  debilitating ME/CFS in Canada (authorized by the
HPB) and a  clinical  trial of  Ampligen  for  renal  cell  carcinoma  in Canada
(authorized by the HPB) and has begun to receive  revenues from a clinical trial
of  Ampligen  for ME/CFS in  Belgium  (authorized  by the  Belgian  Minister  of
Health).  See  "Business--Ampligen."  To date,  the  Company has not granted the
right to market any of the Company's drug products to any third party other than

                                       31


<PAGE>

SAB/Bioclones,  Rivex and certain  commercial  rights to its  subsidiaries.  See
"Business--General," "--Marketing" and "--Subsidiary Companies."

     As part of its  development  strategy,  the Company has initiated  clinical
trials of Ampligen in the U.S.  and Belgium and has been  authorized  to conduct
clinical  trials in Canada and  Ireland.  Ampligen  is being  tested in Phase II
trials in Belgium for ME/CFS, with the active drug administration phase ongoing.
In the U.S.,  the Company is evaluating  and monitoring the duration of the drug
benefit period in certain HIV patients who completed a Phase II trial as well as
monitoring the drug benefit period in certain  patients who previously  received
Ampligen in a Phase I/II trial in HBV  diseases.  The Company  expects  that the
monitoring  will help the Company to determine  and evaluate the duration of the
potential  drug benefit  period.  In  connection  with the foreign  trials,  the
Company  has  received  export  authorization  from the FDA to ship  Ampligen to
Belgium  (for  ME/CFS)  and Canada  (for  ME/CFS and renal cell  carcinoma)  for
clinical  trials which the Company  either has initiated or plans to initiate in
those  countries  for ME/CFS in 1995,  1996 or 1997.  In Japan,  there is a high
incidence of chronic HBV.  Based on data obtained  from the clinical  testing of
Ampligen as a possible  therapy for HBV,  the Company  anticipates  focusing its
efforts  in Japan on the  implementation  of  clinical  trials of  Ampligen  for
chronic HBV. The Company's current strategy is to seek a partnering  arrangement
with  a  Japanese  entity  and,  subject  to  seeking  and  obtaining  necessary
approvals, to conduct trials in Japan through such an arrangement.

     As  indicated  above,  the HPB has approved the  Company's  application  to
conduct an open-label  clinical  trial of Ampligen at specified  sites in Canada
for up to 200 patients with severely  debilitating  ME/CFS.  Clinical  sites are
presently  being  pursued.  The HPB has also  recently  approved  the  Company's
application  to conduct an  open-label  clinical  trial of Ampligen at specified
sites in  Canada  for up to 200  patients  with  renal  cell  carcinoma  (kidney
cancer). In these clinical trials, the HPB has authorized the Company to require
participants to pay the Company for the cost of the Ampligen  administered.  The
Company  understands  that patients may not be reimbursed for these costs by any
Canadian authority or from any private insurer. Due to the inability of patients
to receive  reimbursement,  the Company  may not be able to charge a  sufficient
price  for  the  Ampligen  used  in  such  tests.  The  Company  cannot  promote
participation  in the trial or sale of Ampligen  through  advertisements  to the
general public.

     Subject to obtaining  the  necessary  regulatory  approvals for the sale of
Ampligen  in the home  infusion  (non-hospital)  segment of the U.S.  market and
favorable   results  of  clinical   trials,   which  cannot  be  assured,   (see
"Business--Government  Regulation"),  the Company may utilize a service provider
to execute the direct marketing activities, conduct physical distribution of its
products,  and handle billing and  collections.  The Company  believes that this
approach  may  facilitate  the  generation  of revenues  without  incurring  the
substantial  product  launch costs  associated  with the  employment of a direct
sales force.  Furthermore,  this approach will enable the Company to retain many
options  for  future  marketing  strategies.  The  Company  does  not  currently
anticipate  devoting  substantial  resources to the  development  of an in-house
sales force.

     In Europe, the Company plans to adopt a country-by-country  and, in certain
cases, an indication-by-indication,  marketing strategy due to the heterogeneity
of governmental regulations and alternative distribution systems in these areas.
The Company anticipates that it will adopt an indication-by-indication marketing
strategy in Japan.  The marketing  alternatives  the Company intends to consider

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<PAGE>

include  joint  venture  arrangements  with  pharmaceutical  companies  and  the
co-marketing of the Company's products on a selective basis.

     Pursuant to the SAB  Agreement,  the Company has granted  SAB/Bioclones  an
exclusive marketing license for certain Southern hemisphere countries (including
countries  in South  America) as well as the United  Kingdom,  Ireland,  Africa,
Australia, Tasmania, New Zealand and certain other countries and territories. In
addition,  SAB has  agreed  to use its best  efforts  to  pursue  the  necessary
approval to market Ampligen for HBV in Australia,  South Africa, Brazil, and the
United  Kingdom,  as well as to perform a phase III study of Ampligen in chronic
HBV infection in South Africa. See "Business--General."

     The Company's current  facilities and staff are not adequate to support the
manufacture and production of Ampligen for large-scale commercialization and, to
the extent the Company receives the necessary regulatory  approvals,  it will be
required to significantly increase its quality control, packaging, marketing and
distribution  capabilities in order to sell the approved  product  commercially.
The Company plans to utilize  third-party  facilities  or, if it is unable to do
so,  build or  acquire  commercial-scale  manufacturing  facilities  as the need
arises.  The Company has entered into the SAB Agreement,  which provides for the
issuance  to the  Company of 24.9% of the  capital  stock of a company  which is
developing and operating a new manufacturing facility financed by SAB/Bioclones.
The Company  expects that  manufacturing  at this new facility  will commence in
1996,  on a limited  scale,  with  commercial  production  in 1997,  although no
assurances can be given that this will occur.

     Based on its current  operating plan, the Company  anticipates that the net
proceeds  of  its  recent  financings  and  interest   thereon,   together  with
anticipated  cost  recovery  revenues,  will be sufficient to meet the Company's
capital  requirements  for  approximately  18  months  from  the  date  of  this
Prospectus.  See  "Use of  Proceeds"  and  "Risk  Factors--Additional  Financing
Requirements,   Lack  of  Liquidity,   Uncertainty  of  Additional  Funding  and
Independent Auditors' Report with Explanatory Paragraph."

Ampligen

     Ampligen  is a  high  molecular  weight  RNA  drug  which  is  administered
intravenously.  Based on the  results of  clinical  trials to date,  the Company
believes  that Ampligen may have the  potential to address  significant  medical
needs where  current  treatment  methods are  inadequate  or  non-existent.  The
following  table  summarizes the primary  indications  and the current  clinical
trial regulatory status of Ampligen in the U.S.

                                                               FDA-AUTHORIZED
INDICATION          THERAPEUTIC TARGETS                        CLINICAL TRIALS*
- ----------          -------------------                        ----------------

Antiviral           Chronic HBV (hepatitis B virus)            Phase I/II(1)
                    HIV                                        Phase II(2)
                    ME/CFS (chronic fatigue syndrome)          Phase II/III(3)

Anti-Cancer         Renal Cell Carcinoma                       Phase II/III(4)
                    Melanoma (skin cancer)                     Phase II(5)

*    The  foregoing  chart is  qualified  in its  entirety by  reference to more
     detailed   information   included   elsewhere  in  this   Prospectus.   See
     "Business--Government  Regulation"  for a description of the FDA regulatory
     approval process.

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<PAGE>

(1)  A Phase I/II study was authorized by the FDA. This study has been partially
     enrolled with patients,  and the Company  expects the results of this study
     of Ampligen in HBV to be available in 1996.

(2)  A  FDA-authorized  Phase I and two Phase II clinical trials of Ampligen for
     HIV infection have been completed;  one Phase II trial studied  Ampligen as
     monotherapy  and the second used Ampligen in combination  with AZT. A Phase
     II/III study utilizing Ampligen in a population of largely asymptomatic HIV
     carriers  has  been  presented  to the FDA but is not yet  authorized.  The
     Company is also discussing a  double-blinded  placebo-controlled  Phase III
     study  with the FDA in a  population  of HIV  patients  currently  taking a
     variety of anti-HIV  drugs.  The Company is also  discussing  an open label
     safety trial with the FDA in a similar population.

(3)  The Company has completed a Phase I/II study and a second Phase II clinical
     trial of  Ampligen  in ME/CFS  under FDA  authorizations.  The FDA has also
     authorized the Company's Phase II/III study in ME/CFS which the Company may
     consider initiating in North America in 1996 or 1997.

(4)  A FDA-authorized  Phase I/II study of Ampligen in cancer including patients
     with renal cell  carcinoma  has been  completed.  The Company has  received
     authorization  from the FDA to initiate a Phase II/III study of Ampligen in
     patients with metastatic renal cell carcinoma. At present, the Company does
     not anticipate  devoting  significant  Company  resources to the funding of
     this study, and, accordingly, a date for initiating this study has not been
     determined.

(5)  Patients  with  metastatic  melanoma  have been  treated  with  Ampligen as
     monotherapy under a FDA-authorized  Phase I/II open-label study of Ampligen
     in cancer.  The FDA has  authorized the Company to conduct a Phase II trial
     of Ampligen in  melanoma.  The  Company  expects to initiate  this trial in
     1997.

     The  Company  has not yet  determined  when it will  seek to  commence  its
authorized  Phase II/III clinical trial for renal cell  carcinoma.  Although the
Company plans to use a small  portion of its  available  cash for the renal cell
carcinoma  and melanoma  studies,  the Company plans to seek funding under third
party  collaborative  arrangements  for these studies.  Decisions  regarding the
timing and  sources of funding of such  trials  will be based,  in part,  on the
Company's  progress  in  conducting   clinical  trials  and  seeking  regulatory
approvals for other indications.  In addition,  pursuant to the SAB Agreement, a
controlled  Phase  II/III  clinical  trial  of  Ampligen  for  treatment  of HBV
anticipated to be sufficient for product  registration and  commercialization in
certain foreign countries is contemplated to begin in 1996 or 1997. No assurance
can be given, however, that the clinical trial will be successfully completed or
that product registration or commercialization will ever occur.

Mechanism of Antiviral Action of Ampligen

     When a virus enters a healthy human cell, the cell's normal  response is to
activate the intracellular  enzymes which cause the destruction of viral genetic
information,  thereby preventing viral replication.  Cells also normally produce
extracellular  antiviral factors,  called cytokines (such as interferon),  which
activate the immune  system to attack or scavenge  virally  infected  cells.  In
acute viral  infections  (such as influenza  and  measles),  the presence of the
virus   activates  these   intracellular   alarm  signals  thus  triggering  the
intracellular  and immune  system  response.  Certain  viruses  associated  with

                                       34


<PAGE>

chronic diseases,  such as HIV, ME/CFS associated viruses,  and HBV, may produce
inhibitory  substances which inactivate  these natural  defenses,  and allow the
unchecked  proliferation  of  the  virus.  A  compilation  of  studies  recently
published by the University of Washington  suggests that viruses may not be able
to survive unless they can incapacitate these natural defenses.

     Although  the  antiviral  mechanism  of  action  of  Ampligen  is not fully
understood,  the Company believes that Ampligen's  antiviral mechanism of action
is two-fold. First, the Company believes Ampligen reactivates the inactivated or
dormant  antiviral defense system present in various cells. This natural defense
system,  termed the  ribonuclease  L ("RNAse-L")  and protein  kinase  antiviral
pathways,  disrupts viral  multiplication  within human cells, thereby thwarting
further  virus-induced  cell  damage.  Second,  the  Company  believes  Ampligen
activates  components of the immune  response,  called  macrophages  and natural
killer cells,  which attack or scavenge virally infected cells. This activity is
thought to occur in part by inducing  formation  of selected  cytokines  such as
interferon.  The Company  believes  Ampligen  causes the  production  of various
different antiviral or anticancer proteins.  Thus, the Company believes that the
administration  of Ampligen into the body stimulates the  appropriate  antiviral
defenses at two levels:  first, by activating the  intracellular  defense system
within various cells of the body;  and second,  by activating the immune system,
in part by the production of various interferons in their natural form.

     The  Company  believes  that the  mechanisms  of  action  of most  existing
FDA-approved  antiviral drugs do not stimulate the production of immune cells to
attack, or scavenge,  disease-causing agents such as viruses, in the bloodstream
or  attached  to the surface of cells.  Rather,  these drugs  appear to directly
inhibit the viruses by  interfering  with their  replication.  The Company  also
believes that most of these currently  available  antivirals do not activate the
dormant intracellular defenses described above. See "Business--Competition."

     The Company  believes  that Ampligen may have the ability to elicit a broad
range of host  defenses and,  consequently,  may have the potential to eradicate
certain  viral  infections.  The  Company  believes  that  Ampligen  therapy may
reactivate the RNAse-L and protein kinase pathways; this activity is believed to
arrest further viral  multiplication of certain viruses  including  retroviruses
(such as HIV), HBV, and ME/CFS associated viruses.

Mechanism of Anti-cancer Activity of Ampligen

     Based on preclinical  test results,  the Company believes that Ampligen may
have an anti-cancer  effect at three levels.  First, in order for tumor cells to
divide (and thus multiply), the DNA in such cells must unwind. Ampligen triggers
the production of a chemical  entity called  "bioactive  2-5A" which the Company
believes may inhibit the unwinding of DNA in tumor cells.  Second,  when the DNA
in tumor  cells  unwinds,  the tumor  often  spreads to other  parts of the body
through a process called  metastasis.  Selected regions of the tumor cell's DNA,
called oncogenes,  produce substances which accelerate tumor spread. The Company
believes that Ampligen may activate pathways, such as the protein kinase pathway
referred  to above,  which may serve to inhibit  certain  effects of  oncogenes.
Third,  the Company believes that Ampligen also induces the formation of various
cytokines, including interferon, interleukins and tumor necrosis factor, each of
which may enhance the ability of circulating  immune cells,  such as cytotoxic T
cells and natural  killer  cells,  to scavenge  tumor cells.  Thus,  the Company
believes  that  Ampligen  may  have  three  separate  anticancer  benefits:  (1)
inhibiting  the unwinding of DNA in tumor cells;  (2)  inhibiting  the spread of
tumors  to other  parts of the  body;  and (3)  inducing  formation  of  various


                                       35


<PAGE>

cytokines  which may enhance the ability of healthy  cells to kill tumor  cells.
However,  no  assurance  can be given that  Ampligen  will have any  anti-cancer
effect whatsoever.

Ampligen for Viral Diseases

Chronic Hepatitis B ("HBV")

     The  Hepatitis B virus  ("HBV") is one of several  viruses that cause human
hepatitis,  or  inflammation of the liver.  Worldwide,  an estimated 300 million
people are  chronic  carriers  of HBV.  More than 40% of  persistently  infected
persons who  survive  into  adulthood  will die from  cirrhosis,  hepatocellular
carcinoma (liver cancer),  or some other consequence of their infection.  In the
U.S. alone, there are an estimated 1.25 million carriers. In the mid 1970's, the
first HBV vaccine was developed and it became commercially available in the U.S.
in 1981.

     Hepatitis B, the form of hepatitis  caused by HBV, is a contagious  disease
and is transmitted from person to person in several ways including  contact with
bodily fluids of an infected person.  Perinatal and early childhood transmission
is the  predominant  mechanism of infection,  particularly  in lesser  developed
countries.  Those  populations  most at risk for infection  include  health care
workers, housemates of HBV carriers, the sexually active, hemodialysis patients,
the  immunodepressed,  child care  workers,  IV drug users,  and neonates of HBV
positive mothers.

     Common symptoms of HBV include jaundice, fever and the loss of appetite. In
general,  infants and young children have milder initial  disease than older age
patients.  Adults usually  develop acute  hepatitis after a 4-28 week incubation
period, exhibiting symptoms of fever, nausea, fatigue,  headache,  jaundice, and
an enlarged and tender liver.  Symptoms  usually  disappear 2-12 weeks after the
onset  of  jaundice.  In  rare  cases,  i.e.  in  less  than  1.5%  of  patients
hospitalized  for acute  viral  hepatitis,  a fatal form of the  disease  called
fulminant hepatitis occurs.

     Approximately  90% of HBV acutely  infected  adults  become free of the HBV
antigen  1-5 years  after  infection.  The  remaining  approximately  10% become
chronic  carriers of HBV,  capable of transmitting the disease to other persons.
Chronic  carriers can be divided into two groups:  (i) chronic active  carriers,
and (ii) chronic persistent carriers.  Among chronic carriers, about 3 in 10 are
chronic  active,   exhibiting  frequent  and  often  severe  symptoms  of  acute
infection. Chronic active carriers develop significant liver damage, have a high
incidence   of   hepatocellular   carcinoma   (liver   cancer)  and   cirrhosis.
Approximately  7 out of 10 chronic  carriers  are  chronic  persistent,  and are
generally  asymptomatic or have very mild and infrequent  symptoms of hepatitis.
Chronic  persistent  carriers do not usually develop  significant  liver damage,
hepatocellular carcinoma, or cirrhosis.

     In the U.S., 300,000 new cases of Hepatitis B occur each year. The reported
incidence of the disease has  increased  37% between 1979 and 1989,  despite the
introduction and availability of a vaccine in the early 1980's. Of the estimated
1.25 million  Americans  chronically  infected with HBV, there are about 375,000
chronic active carriers,  resulting annually in approximately  4,000 deaths from
cirrhosis,  and 800 deaths  from  hepatocellular  carcinoma.  In China,  most of
Africa,  Southeast  Asia,  parts of the Middle East, and the Amazon basin, it is
estimated that 8-15% of the population is chronically  infected with HBV. In the
developed  countries,  such as Western Europe, the U.S., and Australia,  chronic
infection  rates are  generally  less that 1% of the  population,  although some

                                       36


<PAGE>

developed  countries--Japan,  Italy,  and Greece,  for  example--report  chronic
infection rates of 2-7%. In southern  Europe,  a resistant  mutant strain of HBV
has been identified for which current vaccines do not provide immunity.

     In late 1991,  the  Company  commenced  a Phase I/II study of  Ampligen  in
HBV-infected   individuals  in  collaboration  with  investigators  at  Stanford
University and the University of Pennsylvania. The protocol for this study calls
for a treatment period of six months,  and the Company expects the results to be
available in 1996.  Subject to completion of and  satisfactory  results from the
Phase  I/II  study,  the  Company  anticipates  seeking  FDA  approval  for  the
initiation of a Phase II/III study for Ampligen for HBV in 1997.

     In  1992,  the  FDA  approved  the  commercial  use  of  recombinant  alpha
interferon  for  the  treatment  of  chronic  HBV  infection.  To the  Company's
knowledge,  this is the only  approved  HBV drug in the U.S.  Published  studies
indicate that 60% to 75% of patients with HBV fail to respond to interferon.

     Among the laboratory markers being monitored in the Company's ongoing Phase
I/II study of Ampligen for HBV is the level of viral DNA. Decreases in viral DNA
levels in clinical  evaluations of interferon were found to correlate positively
with clinical  improvements as well as improvements in liver function.  To date,
eight patients have enrolled in this study.  Significant  decreases in viral DNA
have been observed in 50% of the patients  enrolled in the Company's  study with
the patients' DNA levels becoming undetectable during or after Ampligen therapy.
In addition,  liver  enzymes have been measured as an indication of liver damage
in these patients. There was a significant improvement in liver function with an
approximate 50% or greater  decrease in liver enzyme levels in these  responding
patients and one additional patient. The liver enzymes returned to normal in two
patients during or after Ampligen therapy. Overall, 63% (5/8) of the chronic HBV
infected patients showed a response to Ampligen therapy.

     Ampligen  therapy  was  generally  well  tolerated.  One  patient  who  was
intolerant to IFN-alpha therapy was able to tolerate the full course of Ampligen
therapy at the highest  dose given in this  study.  The  Company  believes  that
Ampligen  therapy may convey certain safety  advantages over interferon  therapy
during prolonged treatment cycles necessary in treating HBV.

     The  Company has also filed  internationally  various  patent  applications
covering  hepatitis  treatment in  conjunction  with closely  related RNA drugs,
including  poly  Ao  poly  U,  which  is also  being  developed  by a  potential
competitor  of the Company.  The Company has notified  the  competitor  that the
Company believes its patents cover various RNA drugs used in potential treatment
of hepatitis infections.

HIV Infection

     HIV infection is  characterized  by a progressive  decline in the patient's
immune system usually  resulting in death from  overwhelming  infections.  Fully
symptomatic  AIDS is associated  with multiple viral  infections and the ongoing
destruction of the immune system. At present,  each of these viral infections is
generally treated separately,  resulting in a  "multi-pharmaceutical"  treatment
approach for each patient. In studying potential treatments for AIDS, scientists
have  employed  CD4 cell counts as a surrogate  marker to indicate the extent to
which the disease has progressed.  Independent  studies of the natural course of
HIV disease at the Harvard  University  School of Public  Health have  indicated

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<PAGE>

that  stabilization  of CD4 levels is associated with reduced short term risk of
death.  The  Company  believes  that  correction  of the  underlying  deficit in
cellular immunity may result in longer-lasting  clinical benefits than currently
approved  treatments  and also  may  reduce  the  need for  multi-pharmaceutical
treatments.

     In 1986, the Company initiated a Phase II study in ten individuals with HIV
disease,  three of whom had fully  symptomatic  AIDS.  This study indicated that
Ampligen  treatment  appeared to delay the expected immune cell deterioration in
six of the seven HIV  patients  who had not  progressed  to AIDS.  Although  the
Company regards these observations as clinically important, it does not consider
them to be  statistically  significant due to the small number of cases studied.
In a separate  study  conducted  in  Houston,  Texas  between  1987 and 1989 and
completed at Baylor University in an extension of the Company's first HIV study,
AZT was  administered as part of a combination  therapy with Ampligen.  Patients
who received this combinational  therapy experienced a stabilization of CD4 cell
levels  for a longer  time  than was  reported  for  patients  receiving  either
Ampligen  alone or AZT  alone.  Data  obtained  at the  United  States Air Force
Medical  Center,  Veterans  Administration  Hospitals  and the Walter  Reed Army
Institute of Research indicate that  responsiveness to foreign antigens injected
under the skin ("skin tests")  predicts  anticipated  life span in patients with
HIV disease.  As HIV disease  progresses,  patients may cease to have a positive
skin test  response.  The Company's  Phase II studies  suggest that Ampligen may
have restored the positive skin test  response in HIV infected  individuals  who
had not  progressed  to AIDS at the time of  initiation  of Ampligen  treatment,
although  these  preliminary  results must be confirmed in  subsequent  clinical
trials consisting of larger numbers of patients.

     In 1987, the Company  formed a joint venture with DuPont which  sponsored a
multi-center,   double-blind  placebo-controlled  Phase  II  clinical  study  of
Ampligen for the treatment of HIV  infection.  The total  patient  population of
this study was 330. This study, known as AMP 101, was terminated in 1988 when an
analysis of interim  data showed no clinical  benefit from  Ampligen  therapy as
opposed  to  placebo.  After  comparing  the data from this study with data from
other studies, and additional experimental investigation,  the Company concluded
that the activity of the Ampligen  administered  to the  participants in the AMP
101 study was impaired due to a reaction which the Company believed to have been
caused by the packaging of Ampligen in polyvinyl  chloride  (plastic) bags. Such
plastic  bags had not  previously  been used in the  packaging  and  delivery of
Ampligen  used in other  clinical  trials.  On April 13, 1990, a fifteen  member
scientific  panel assembled by the NIH in order to evaluate whether an NIH grant
for the  clinical  testing of Ampligen  should be renewed  issued its report and
recommendations  regarding the renewal of this grant.  This report observed that
the  Ampligen  used in the AMP 101 study had been  found by the  Company to have
increased  content of single strand RNA due to  preparation  of the drug and the
use of plastic bags. The report  further stated that "the promising  preliminary
results obtained make further evaluation of the compound alone or in combination
with other agents of great  importance to define fully its role as a therapeutic
agent." The joint venture  arrangement  with DuPont was later terminated as part
of the  settlement  of a lawsuit  brought  against  the Company by DuPont and an
action  against  DuPont  brought by the Company  related to the AMP101 study and
alleged breaches of the joint venture agreement.

     In 1991, the NIH, through the National  Institute of Allergy and Infectious
Diseases,  completed  an  open-label  Phase I/II study of Ampligen  involving 39
patients at the University of Pittsburgh treated at different dosages. Of the 24
evaluable patients who received at least 120 mg/m2 of Ampligen for the treatment
of HIV, 14 patients experienced stabilized CD4 levels for at least nine weeks.

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<PAGE>

     The Company has  conducted  a Phase II clinical  trial of Ampligen  for HIV
infection.   This  study,  which  was  initiated  in  1990,  was  a  randomized,
controlled,  multicenter  study evaluating  Ampligen therapy in combination with
AZT. The Company filed the results of this study with the FDA in late 1993 along
with a request for approval to initiate a Phase II/III study in 1994.  The Phase
II/III study currently being  considered by the FDA would utilize  Ampligen in a
population of largely  asymptomatic HIV carriers.  The FDA raised certain issues
with respect to the Phase II clinical  trial  results,  including the laboratory
endpoints  used.  The Company has  presented  to the FDA the design of the Phase
II/III study,  including  identification of appropriate  clinical and laboratory
endpoints. See "Business--Government Regulation."

     Currently, the principal treatments for HIV are AZT, DDI, DDC, D4T, 3TC and
a new group of compounds  termed protease  inhibitors,  of which three have been
recently approved.  In the case of each of these drugs, most patients ultimately
cease to benefit  from the drug due to the  emergence of new strains of the AIDS
virus.  Based on the  results  obtained  to date,  an AZT  resistant  virus  has
remained  sensitive  to  Ampligen  in various in vitro  studies  which have been
performed  at  Hahnemann  University.  Although no  assurances  can be given and
additional  testing will be necessary to substantiate the Company's belief,  the
Company  believes  that  human  subjects  may be less  likely to  develop  viral
resistance to Ampligen as a result of the drug's perceived  mechanism of action.
See "Business--Mechanism of Antiviral Action of Ampligen."

ME/CFS

     ME/CFS is characterized  by unexplained  fatigue or chronic illness for six
months or longer for which no cause has been identified after a thorough medical
workup. Although the etiology of ME/CFS is unknown, a significant segment of the
medical community believes that it may be caused by a virus because the onset of
the condition is usually  characterized by flu-like symptoms followed by chronic
tiredness  that,  in some cases,  can continue  for years.  ME/CFS is also often
accompanied  by a disturbance  of the patient's  immune  system,  as measured by
lower levels of natural killer cell activity and/or lower lymphocyte counts.

     Data reported by a consortium of institutions  including Harvard University
and the  University  of  Washington  indicate  that a majority  of those  ME/CFS
patients who have been tested have been found to have elevated  levels of herpes
virus  (HHV-6) as well as brain  abnormalities  that were noted during  magnetic
resonance  imaging  (known as MRI) testing.  Because there may be both viral and
immune components to this disease, the Company believes, although it has not yet
clinically  proven,  that Ampligen may be well suited as a treatment for ME/CFS.
There  are no  drugs  specifically  approved  by the FDA for this  disorder  and
physicians typically prescribe analgesics and anti-inflammatory  drugs to combat
the painful symptoms.

     In 1989,  the Company  received FDA  authorization  to conduct a Phase I/II
study of Ampligen  for ME/CFS.  In 1991,  the Company  completed a  multicenter,
double-blind,  placebo-controlled  Phase II clinical trial (the "Phase II ME/CFS
Study") of Ampligen in patients with ME/CFS.  The FDA raised certain issues with
respect to this clinical trial.  See  "Business--Ampligen  Safety Profile" for a
discussion of the drug safety issues raised by the FDA.

         In 1992, the Company  received  approval from the HPB, the federal drug
regulatory  agency  in  Canada,  to  conduct  an  open-label  clinical  study at

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<PAGE>

specified  sites to evaluate  the  activity  and safety of Ampligen in up to 200
patients with severely  debilitating  ME/CFS. The Company has been authorized to
require  patients in this  clinical  study to pay the  Company for the  Ampligen
administered.  The Company  understands  that patients may not be reimbursed for
these  costs by any  Canadian  authority  or any  private  insurer.  The Company
anticipates  that initial patients may be enrolled in this study during 1997. In
October and November 1992, respectively,  the Company was authorized by the FDA,
in the U.S.,  and the HPB, in Canada,  to initiate a Phase  II/III  multicenter,
placebo-controlled,  randomized,  double  blind  clinical  trial  in up  to  230
patients  in the  U.S.  and  Canada  with  ME/CFS.  In  December  1992,  the FDA
authorized  the export of Ampligen  for  investigational  use for  treatment  of
ME/CFS patients in Canada. The Company  anticipates this study will be initiated
in 1997 at multiple centers in North America.

     In February  1993, the Company  presented  results of its Phase II study of
Ampligen  for  ME/CFS  to an FDA  Advisory  Committee  and  these  results  were
published in early 1994 in Clinical Infectious Diseases, a peer reviewed medical
journal which emphasizes the understanding and potential treatment of infectious
diseases.  The results indicated that patients on Ampligen, in contrast to those
receiving a placebo,  showed  significant  improvement  in physical  capacity as
determined by performance on treadmill  testing.  The Ampligen  treated  patient
group also required less pain medication than did the placebo group.

     In December 1993,  Ampligen was designated as an Orphan Drug by the FDA for
the   treatment  of  Chronic   Fatigue   Syndrome.   See   "Business--Government
Regulations."

Ampligen for Cancer

Renal Cell Carcinoma (Kidney Cancer)

     Based on estimates  prepared by the American  Cancer  Society,  the Company
anticipates  that  there  will be  approximately  25,000 new cases of renal cell
carcinoma  diagnosed in the U.S. in 1996.  Patients with  metastatic  renal cell
carcinoma  show five-year  survival rates of only 2%-18%.  Treatment of advanced
renal cell carcinoma with  metastases  with  conventional  chemotherapy  has not
resulted in  significant  median  increases  in  survival.  Biological  response
modifiers,  or  lymphokines,  have also been used with limited  success to treat
renal cell carcinoma patients. To the Company's knowledge, the only FDA approved
drug for the treatment of renal cell carcinoma is Interleukin-2 ("IL-2"),  which
is a biological  response modifier.  Based on published reports,  treatment with
IL-2 results in a reduction in tumor size in approximately  10%-20% of patients.
Increased survival of patients receiving IL-2 therapy has been reported. The FDA
approved  IL-2 in 1992  for  sale in the  treatment  of  metastatic  renal  cell
carcinoma.

     In 1991,  Ampligen  was  designated  as an  Orphan  Drug by the FDA for the
treatment of renal cell  carcinoma.  See  "Business--Government  Regulations." A
Phase I/II clinical trial of Ampligen in cancer  patients was initiated in 1983.
Thirteen patients with metastatic renal cell carcinoma  received Ampligen at low
doses (10-120 mg.) twice weekly;  eighteen  patients with metastatic  renal cell
carcinoma  received  Ampligen at high doses  (200-500  mg.) twice  weekly.  Data
analysis  from this study  indicates  that the  patients  in the high dose group
experienced  an  increase  in median  survival  versus the low dose group and as
compared to an  historical  control  group of 610  patients.  Specifically,  the
median  survival  for the  Ampligen  high dose group was 20.4  months  while the
median survival for the historical  control group was 5.5 months.  This increase
represents a 370%  prolongation  of survival in the high dose  Ampligen  treated

                                       40


<PAGE>

group. The survival of the low dose Ampligen group did not increase  compared to
the historical control group.  Overall,  the Company believes that these results
are  encouraging   given  the  substantial   inadequacy  of  current   treatment
modalities, and the short life expectancy of many renal cell carcinoma patients.
The Company  believes that these results suggest that there may be a correlation
between high dose Ampligen  treatment and increased survival in metastatic renal
cell carcinoma patients.

     On March 22,  1993,  the  Company  received  authorization  from the FDA to
initiate  an open  label,  active-controlled,  multicenter  study of Ampligen in
patients  with  metastatic  renal  cell  carcinoma.  On  June 7,  1993,  the HPB
authorized the Company to conduct this clinical trial in Canada. At present, the
Company  does not  anticipate  devoting  significant  Company  resources  to the
funding of these  studies,  because the size of the  potential  market for renal
cell carcinoma is relatively small.

     On June 7, 1993, the Company also received  approval from the HPB in Canada
to conduct a second open-label clinical study at specified sites to evaluate the
activity and safety of Ampligen in up to 200 patients with renal cell carcinoma.
The Company has been  authorized to require  patients in this clinical  study to
pay the Company for the Ampligen  administered.  There can be no assurance  that
patients will be reimbursed for these costs by any Canadian  authority or by any
private  insurer.  The Company has not initiated this program to date because of
limited  resources  and  a  shift  in  the  Company's  clinical  priorities  but
anticipates  that,  once  resources  are  available,  initial  patients  will be
enrolled in this study during 1997.  The Company does not believe that approvals
for these studies will be withdrawn as a result of the delay since the approvals
were not conditioned upon a particular commencement date.

     The  Canadian  clinical  trials  have not yet been  approved by the ethical
review committees  ("ERCs") at the respective  clinical sites involved,  and the
Company  has agreed  with the HPB not to proceed  with such  trials  unless such
approvals  are  obtained.  These  approvals  are  required  for all drug studies
conducted  in Canada.  Although  the  Company  believes  that it will be able to
secure the  approvals of the ERCs,  no  assurances  can be given with respect to
when,  or if,  these  approvals  will be  obtained.  The  Company  has  received
authorization from the FDA to export Ampligen to Canada for  investigational use
for treatment of renal cell carcinoma patients in Canada.

Malignant Melanoma

     Data from the American  Cancer  Society and the WHO indicate  that both the
incidence and mortality from malignant  melanoma are rising steadily among white
populations  throughout the world. In the past decade, the incidence of melanoma
has increased faster than that of any other cancer, except lung cancer in women.

     In December 1993,  Ampligen was designated as an Orphan Drug by the FDA for
the  treatment  of  invasive  malignant  melanoma.   See   "Business--Government
Regulations."  Patients with metastatic melanoma have been treated with Ampligen
as  monotherapy  under a Phase I/II  open-label  study of  Ampligen as part of a
broader study of cancer patients at Hahnemann  University  beginning in 1983 and
Yale University  beginning in 1991. Two of the ten patients treated had complete
responses,  as  substantiated  by computerized  axial  tomography  (known as CAT
scans). There was no evidence of clinical benefit among the eight other patients
in this study. The FDA has authorized the Company to conduct a Phase II trial at
the M.D.  Anderson  Hospital in Houston,  Texas. The Company expects to initiate
this trial in 1997.

                                       41


<PAGE>

Ampligen Safety Profile

     The Company  believes that Ampligen has been  generally  well  tolerated in
more than  15,000  patient  treatment  weeks with a low  incidence  of  clinical
toxicity,  particularly  given  the life  threatening  diseases  being  treated.
Clinical experience with Ampligen now totals 311 patients,  of whom 171 patients
have received  Ampligen for six months or more. Of these patients,  117 patients
have received  Ampligen for one year or more; 63 patients have received Ampligen
for two years or more;  and 22 patients  have  received  Ampligen for periods in
excess  of  three  years.  A  mild  flushing   reaction  has  been  observed  in
approximately  15% of patients treated in the Company's  various  studies.  This
reaction is  occasionally  accompanied  by  erythema,  a tightness of the chest,
tachycardia,  anxiety, shortness of breath, subjective reports of "feeling hot,"
sweating  and  nausea.  The  reaction is usually  infusion-rate  related and may
generally be controlled by slowing the infusion rate. Other adverse side effects
include liver enzyme level elevations, diarrhea, itching, urticaria (swelling of
the skin), bronchospasm, transient hypotension,  photophobia, rash, bradycardia,
transient  visual  disturbances,  arrhythmias,  decreases in platelets and white
blood cell counts, anemia,  dizziness,  confusion,  elevation of kidney function
tests,  occasional temporary hair loss and various flu-like symptoms,  including
fever,  chills,  fatigue,  muscular aches,  joint pains,  headaches,  nausea and
vomiting. These flu-like side effects typically subside within several months.

     In February  1992,  after the  conclusion  of the Phase II ME/CFS Study and
subsequent to the  Company's  submission of data from that study to the FDA, the
FDA advised the Company,  among other things, of certain concerns  regarding the
safety  profile  of  Ampligen.  Specifically,  the FDA noted that  various  side
effects  of  Ampligen  had been  observed  during  the  Phase II  ME/CFS  Study,
including  severe liver  toxicity,  severe  swelling and itching of extremities,
severe chest pain,  severe muscle  cramps and severe  flu-like  symptoms.  These
observations  were made by the FDA in the  context  of the  FDA's  review of the
Company's proposed protocol for a Phase II/III ME/CFS trial.

     In July 1992,  the Company  responded  to these  concerns by  providing  an
analysis  of the side  effects  data  obtained  from the  Phase II study and the
treating  physicians'  views. The Company observed that many of the side effects
described  by the  FDA  were  regarded  by both  the  Company  and the  treating
physicians  of those  patients as unrelated to Ampligen  treatment.  The Company
advised  the FDA of the  Company's  view  that the data from the Phase II ME/CFS
Study indicated that Ampligen  appeared to have a favorable  risk/benefit  ratio
for ME/CFS. On October 9, 1992, the FDA authorized the Company's  proposed Phase
II/III clinical trial for ME/CFS, concluding "that it is reasonably safe for the
initiation of [the Company's]  proposed  clinical study." This regulatory action
allows  Ampligen  to be  administered  for up to one year to an  additional  115
patients (in a 230 patient placebo-controlled trial).

     In February 1993, the FDA raised an issue  regarding  possible side effects
of Ampligen which grew out of the agency's  review of an animal study  conducted
in 1987  involving  beagle dogs.  Although  the results of this study  suggest a
possible  association  between Ampligen  administration and focal epicarditis (a
small  localized  area of  inflammation  of the outer lining of the heart),  the
study did not establish  whether the  epicarditis  observed was  attributable to
Ampligen administration. The meaning of these findings in the beagle dog and how
they relate to human clinical  experience is not presently known.  Because these
conditions  were not  observed in any other  animal  studies or in the  clinical
trials  conducted in humans over the previous  ten years,  the Company  believes

                                       42


<PAGE>

that these  findings may be  restricted to the beagle dog. The FDA has requested
that the  Company  conduct an  additional  toxicity  study of Ampligen in beagle
dogs.  The FDA has also asked the Company to revise the informed  consent  forms
provided to patients upon enrollment in the Company's clinical trials to include
the findings of the 1987 study concerning epicarditis in beagle dogs, as well as
other toxicities observed during the course of the Company's various preclinical
toxicology studies in rabbits,  rats, dogs and monkeys.  The Company has revised
its informed consent forms in accordance with this request. Finally, the FDA has
also asked the  Company  to conduct  cardiovascular  follow-up  examinations  on
selected patients in accordance with criteria  suggested by the FDA. The Company
has complied with this request.  These  examinations,  the results of which were
submitted  to the FDA in March,  April and May,  1993,  showed  no  evidence  of
Ampligen-induced epicarditis in these patients. The Company believes that it has
adequately  complied with the FDA's requests for  information  and believes that
the issues  raised by the FDA will not have a material  effect on the  Company's
efforts to receive approval for Ampligen as a treatment for ME/CFS,  although no
assurances can be given.

     In  connection  with the  proposed  Phase III study on HIV  patients  under
discussion with the FDA, the Company will complete  additional  toxicity studies
as required by the FDA.

Oragen Drugs

     The Company is in the early pre-clinical stages of developing Oragen drugs,
a nucleic acid  technology  related to Ampligen.  Oragen drugs are low molecular
weight RNA compounds which the Company believes,  by virtue of their small size,
have the  potential for becoming  oral,  broad-spectrum  treatments  for various
viral diseases such as HIV infection and chronic HBV  infection.  The technology
for these  products has been  developed in part by the Company and has also been
developed in part by Temple University which has licensed to the Company certain
technology for commercial use on an exclusive basis,  subject to certain limited
exceptions.  The  Company  was  notified  in July  1994 that  Temple  University
believed the Company was in breach of the licensing agreement and therefore that
the agreement was being  terminated.  The Company has filed a lawsuit  seeking a
declaratory  judgement  that the agreement  remains in full force and effect and
seeking monetary damages. See "Business--Research and Development, Licensing and
Collaboration    Agreements,"    "Business--Legal    Proceedings"    and   "Risk
Factors--Disputes  and Legal Proceedings Related to Patent Rights". In the event
that the Company  does not prevail in its  lawsuit and the  agreement  is deemed
terminated,  the Company  would lose its  investment  to date in certain  Oragen
compounds which it acquired  pursuant to its licensing  agreement.  Although the
Company has developed its own Oragen  compounds,  to which it would maintain its
rights,  Temple or its new licensees,  if any,  could become  competitors of the
Company in the event that the Company does not prevail in its lawsuit.  To date,
a number of compounds have been developed  using this nucleic acid technology by
both the Company and Temple,  working both together and separately.  No clinical
trials of Oragen drugs have been conducted,  and  authorization  to conduct such
trials cannot be sought or obtained  until such time as sufficient  pre-clinical
work has been completed.

     Initial studies show that these drugs can withstand enzymatic  destruction,
an  important  factor in order  for  compounds  to enter the blood  stream in an
intact form.  Results from in vitro studies conducted in collaboration  with the
National  Institute  of Allergy and  Infectious  Diseases  indicate  that Oragen
products  may  inhibit  HBV  infection,   and  in  vitro  studies  conducted  in
collaboration  with  the National  Cancer Institute and the University of Mainz,

                                       43


<PAGE>

Germany, indicate that Oragen products may inhibit HIV infections. One compound,
Oragen 0004, has shown  inhibition of HBV  multiplication  in vitro and another,
Oragen 0044, has demonstrated activity against HIV in in vitro studies performed
by  Temple  University.  These  two  Oragen  compounds  have  been  produced  in
quantities  which the Company  believes are sufficient to perform initial animal
toxicology  testing.  Recent  experiments with mice at the University of Toronto
indicate that Oragen 0004 may inhibit  mouse  hepatitis  virus,  and that Oragen
0004 may be  absorbed  after  oral  delivery.  There has been no human  clinical
testing  of Oragen  products  to date.  There  can be no  assurance  that  human
clinical  testing,  if  initiated,  will  yield  results  consistent  with those
achieved in in vitro or animal testing.

     The  Company  believes  that  Oragen  drugs may exert  anti-viral  activity
through two intracellular mechanisms. First, they may activate the intracellular
"latent"  RNAse-L  to  degrade  viral  RNA.  Second,  they may  inhibit  the HIV
replication enzyme, reverse transcriptase, by binding to a different site on the
enzyme  from that bound by  conventional  anti-HIV  compounds  such as AZT.  The
Company's belief in the potential  effects of these compounds is based, in part,
on the  collaborative  in vitro  studies  with  the  National  Cancer  Institute
referred  to  above.  Certain  in  vitro  experiments  performed  at  Vanderbilt
University  indicate that certain human immune cells can be protected  from cell
death caused by HIV infection by treatment with Oragen drugs.  Under sponsorship
of the National Institute for Allergy and Infectious Diseases,  in vitro studies
at Georgetown  University  also  demonstrated  that Oragen drugs may inhibit the
replication of human HBV virus. In each of the in vitro studies,  no substantial
cell toxicity was observed at concentrations which inhibit the applicable virus.

     The  Company  believes  Oragen  drugs  work  at a  different  stage  of the
anti-viral  and  anti-cancer  response  chain than Ampligen and therefore may be
effective in disorders where the activity of Ampligen is limited.

     The  following  table shows the  Company's  past and  present  pre-clinical
studies of Oragen  compounds.  Except as otherwise  noted, the studies have been
conducted  under  collaborative  arrangements  pursuant  to  which  the  Company
supplies quantities of the drug to the third party institution for testing,  and
that  institution  assigns  all of the  commercial  rights to the studies to the
Company and funds the research costs. See "Research and  Development,  Licensing
and Collaboration Agreements."

Target Programs     Potential Market Applications      Collaborators
- ---------------     -----------------------------      -------------

Human Immuno-
 deficiency         Treatment of HIV                   National Cancer Institute
Virus (HIV)                                            Temple University(1)(2)
                                                       Vanderbilt University(1)
                                                       University of Mainz,
                                                       Germany(1)

Hepatitis B Virus
 (HBV)              Treatment of HBV                   National Institute of
                                                       Allergy and Infectious
                                                       Diseases, Georgetown
                                                       University

                                       44


<PAGE>

Mouse Hepatitis
 Virus                  Treatment of Hepatitis C       University of Toronto(1)

Herpes Simplex Virus
    Type 1 and 2        Treatment of Herpes            Medical College of
   (HSV-1, HSV-2)       Infections                     Pennsylvania(1)
                                                       Juntendo University
                                                       Tokyo, Japan

Poliovirus/Respiratory
Syncytial virus         Childhood Viral Diseases       Howard University

Solid tumors            Treatment of various
                        types of cancer                Temple University(1)(2)
                                                       Hahnemann University

(1)  Funding  provided by the Company.  In all other cases,  funding provided by
     the institution.

(2)  The Company was notified in July 1994 that Temple  believed the Company was
     in breach of its licensing  agreement and therefore  that the agreement was
     being  terminated.  The Company has filed a lawsuit  seeking a  declaratory
     judgment  that the  agreement  remains in full force and effect and seeking
     monetary  damages and Temple has filed a lawsuit  against the Company.  See
     "Business--Legal  Proceedings"  and "Business--  Research and  Development,
     Licensing and Collaboration Agreements."

Diagnostic Products

     The  Company is also  developing  a set of clinical  laboratory  diagnostic
products, trademarked Diagen products, that are designed to assist physicians in
identifying patients for the Company's RNA drug therapies and to assist in their
clinical  management  thereafter.  The Company believes that the availability of
such tests may lead to improved patient care and increased market penetration by
the Company's  products,  if and when such products are available for commercial
sale.  While these tests are at an early stage of  commercial  development,  the
Company   believes  that  they  may  ultimately   provide  an  opportunity   for
diversification  of the Company's products and revenues and may help to identify
patients  who could  benefit  from the  Company's  drug  treatment.  The  Diagen
products  would have to go through a  regulatory  diagnostic  product  clearance
process prior to commercial sale. See "Business -- Government Regulation" below.

Subsidiary Companies

     In September 1994, the Company incorporated three wholly-owned subsidiaries
- -- BioPro Corp. ("BioPro"),  Core BioTech Corp. ("Core BioTech"),  and BioAegean
Corp. ("BioAegean") -- in the state of Delaware.

     The purpose of BioPro is to commercialize  tobacco-related products. BioPro
intends to develop methods to utilize RNA technology in conjunction with certain
tobacco and cigarette filter products to provide cleaner tobacco  products.  The
technology  is based in part on recent  unpublished  experiments  in  laboratory
animals conducted at the University of California, Davis, which suggest that the
Company's RNA drugs may prevent  certain  aspects of lung fibrosis under certain

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<PAGE>

experimental  conditions.  In September,  1994, the Company granted an exclusive
worldwide  license  and/or  sub-license  to certain of its patents and  assigned
certain  other  patents to BioPro  (the  "BioPro  License")  for a term of three
years,  which term will  automatically be extended for a term of 15 years in the
event that BioPro provides  evidence that it has  commercialized  one or more of
the  patents.  BioPro  has  agreed  that it will  not  develop  any  product  or
technology  which may be  deemed  therapeutic  and has  granted a right of first
refusal to the Company  with respect to any  technology  which it may develop or
acquire.  BioPro has the right to grant  sublicenses  subject to the requirement
that its sublicensees  agree to  non-competition  arrangements with the Company.
The Company has agreed  that it will not develop any  technology  related to the
business of BioPro and has granted  BioPro a right of first refusal with respect
to any technology it may develop with respect to the business of BioPro.

     In July  1995,  the  Company  entered  into an  agreement  with  Vernacular
Communications, Inc. and certain other individuals (collectively,  "Vernacular")
pursuant  to which  Vernacular  will  provide  various  services  to and for the
Company and BioPro, including introduction to the Company and BioPro of entities
interested  in  potential  corporate   alliances.   If,  as  a  result  of  such
introductions,  the Company  and BioPro  enter into a  transaction  with such an
entity,  the  Company  shall (i) pay to  Vernacular  8%, 6% and 3% of the first,
second and third  million  dollars,  respectively,  paid to the  Company for the
licensing  of its  products  through  BioPro and 2% of each  subsequent  million
dollars, (ii) pay to Vernacular 10% of all licensing fees/ royalties received in
connection with the transaction and (iii) grant to Vernacular 4% stock interests
in  BioPro  and/or  any  other  business  entity  created  as a  result  of  the
transaction.  In addition,  the Company  agreed to pay one of the  individuals a
one-time consulting fee of $25,000.

     The purpose of Core BioTech is to  commercialize  the Company's  diagnostic
oriented  patents which provide RNA  technology to detect  certain  difficult to
diagnose viral diseases such as ME/CFS and other immuno-dysfunctional conditions
through  strategically  located central  reference  laboratories.  In September,
1994, the Company granted an exclusive  worldwide license and/or  sub-license to
certain of its patents and assigned  certain  other patents to Core BioTech (the
"Core BioTech License") for a term of three years, which term will automatically
be  extended  for a term of 15 years in the  event  that Core  BioTech  provides
evidence that it has commercialized one or more of the patents. Core BioTech has
agreed that it will not develop  any product or  technology  which may be deemed
therapeutic and has granted a right of first refusal to the Company with respect
to any technology which it may develop or acquire. Core BioTech has the right to
grant  sublicenses  subject to the requirement  that its  sublicensees  agree to
non-competition  arrangements  with the Company.  The Company has agreed that it
will not develop any technology  related to the business of Core BioTech and has
granted Core BioTech a right of first refusal with respect to any  technology it
may develop with respect to the business of Core BioTech.

     The  purpose  of  BioAegean  is to  commercialize  the  Company's  consumer
oriented patents,  especially in the skin care area including the development of
sunscreens  to prevent  malignant  melanoma and  maintain  vitality of cutaneous
tissues normally lost with aging or increased sun exposure. In September,  1994,
the Company granted an exclusive worldwide license and/or sub-license to certain
of its patents and assigned  certain other patents to BioAegean (the  "BioAegean
License") for a term of three years,  which term will  automatically be extended
for a term of 15 years in the event that BioAegean provides evidence that it has
commercialized one or more of the patents. BioAegean has agreed that it will not
develop  any  product  or  technology  which may be deemed  therapeutic  and has
granted a right of first  refusal to the Company with respect to any  technology

                                       46


<PAGE>

which it may develop or acquire.  BioAegean  has the right to grant  sublicenses
subject  to the  requirement  that its  sublicensees  agree  to  non-competition
arrangements  with the Company.  The Company has agreed that it will not develop
any technology  related to the business of BioAegean and has granted BioAegean a
right of first  refusal  with  respect to any  technology  it may  develop  with
respect to the business of BioAegean.

     In exchange for the grant of the BioAegean License, BioAegean has agreed to
issue the following  securities to the Company:  (i) 1,000,000  shares of common
stock of BioAegean,  (ii) an option to purchase 1,000,000 shares of common stock
of BioAegean at an exercise price of the lesser of the initial  public  offering
price of BioAegean or $5.00 per share,  provided the initial public  offering of
BioAegean  occurs before May 4, 1997 and (iii) 10,000 shares of Preferred  Stock
having a liquidation preference and a right to 1,000 votes for each share on all
matters that may come before the shareholders.

     In June 1995, the directors of BioAegean  approved the private placement of
1,000,000 shares of common stock at $1.00 per share which is expected in 1996 or
1997. In addition, the directors of BioAegean issued 10-year options to purchase
an  aggregate  of  1,200,000  shares of common stock of BioAegean at an exercise
price  of  $1.00  per  share  (the  "BioAegean  Options")  to its  officers  and
directors.  The BioAegean Options are conditional upon the recipient's agreement
to serve BioAegean as needed for at least 24 months unless fully  incapacitated.
William A. Carter, M.D., Chairman,  President and Chief Executive Officer of the
Company, serves as Chairman, Chief Executive Officer and a Director of BioAegean
and  received  300,000  BioAegean  Options.  Peter  Rodino,  III, a director and
Secretary of the Company, serves as Vice-Chairman,  Secretary, Corporate Counsel
and a director of BioAegean and received 150,000 BioAegean  Options.  R. Douglas
Hulse serves as Chief  Operating  Officer of both the Company and  BioAegean and
received  50,000  BioAegean  Options.  Robert Peterson serves as Chief Financial
Officer of both the Company and BioAegean and received 50,000 BioAegean Options.
Sharon Will, Vice President of Investor  Relations and Corporate  Communications
for the  Company,  serves as Vice  President  of  Marketing  for  BioAegean  and
received 150,000 BioAegean Options. Harris Freedman serves as Vice President for
Strategic  Alliances  for both the Company and  BioAegean  and received  150,000
BioAegean  Options.  Richard  Piani,  a  director  of the  Company,  serves as a
director and the Advisor for European  Affairs of BioAegean and received  50,000
BioAegean  Options.  Gerald Kay serves as a director  for both the  Company  and
BioAegean and received 50,000 BioAegean Options. BioAegean's remaining director,
Jerome Belson, a principal shareholder of the Company, received 50,000 BioAegean
Options.

     While  the  Company  believes  it has  developed  an  international  patent
position to cover these possible  applications of its  technology,  no assurance
can be given  that any of the goals of the three  subsidiaries  described  above
will be  achieved,  that  significant  clinical  testing  will  occur,  that any
products will  ultimately be  developed,  commercially  or otherwise or that the
Company's  patent  position  will be adequate to protect any products  which may
result.

Patent Rights

     The Company has sought patent protection in four major geographic  markets:
the United  States,  Canada,  Europe,  and Japan.  The Company has filed  patent
applications  involving  chemistry  and  processes  with  the  U.S.  Patent  and
Trademark  Office and foreign patent  applications in other  countries,  such as
members  of  the  European  Patent  Convention,   Canada,  Japan,  South  Korea,
Australia.  The Company's patents and patent applications are principally "field
of therapeutic use" patents and cover various  potential  uses  of the Company's

                                       47


<PAGE>

RNA technology in the health care field,  including ethical drugs for anti-viral
and  cancer  indications,  as  well as  non-prescription  consumer  health  care
products.  "Field of therapeutic  use" patents restrict the use of the compounds
to  specific  disease  categories  or  medical  conditions  but do not  restrict
potential  competitors from  manufacturing  the same product for other potential
uses which are not covered by the Company's patents.  Of the patent applications
filed  worldwide,  as of  June  30,  1996  approximately  230 had  been  issued,
including  13 U.S.  patents  and 13 Canadian  patents.  None of such issued U.S.
patents will expire prior to the year 2006. No assurances  can be given that the
Company's pending  applications  will mature into patents.  The Company believes
that all of these 200 patents are pertinent to the Company's  present and future
operations  as the  Company  expects to market its  product in Europe,  Asia and
certain  Third World  countries,  although  the Company has not entered into any
additional  agreements with respect to these areas and no assurance can be given
that any business relationship will result.

     The Company's  ability to receive patent protection for the commercial sale
of Ampligen is subject to the Company's  obtaining  enforceable patents covering
the use of the drug for a  particular  indication.  The  Company has been issued
certain  patents on the use of Ampligen alone and Ampligen in  combination  with
certain other drugs for the treatment of HIV. The Company has also been issued a
patent on the use of Ampligen in  combination  with certain  other drugs for the
treatment of HBV and HCV and a patent  which  affords  protection  on the use of
Ampligen in patients with ME/CFS.  To date,  the Company has not been issued any
patents in the U.S.  regarding  the use of Ampligen for treatment of the cancers
which the  Company has sought to target.  The  Company's  applications  for such
patents are currently pending; no assurances can be given that such applications
will be allowed.  No assurances can be given that  competitors will not seek and
obtain patents  regarding the use of Ampligen for a particular target indication
before the Company.

     The Company's  licensor,  Temple University,  has filed patent applications
regarding the  composition of matter,  methods of  preparation  and use of novel
double-stranded RNAs,  oligonucleotides,  and 2-5A analogues trademarked Oragen.
Composition  of  matter  patent   applications  have  been  filed  which  define
nucleotide  sequences  and  RNA  structures  that  correct  certain  biochemical
reactions which may be associated with immunological disorders.

     In July 1994, Temple  University  advised the Company that it was in breach
of a certain  licensing  agreement for Oragen compounds at the preclinical stage
of  product   development.   In  November  1994,  in  an  action  captioned  HEM
Pharmaceuticals  Corp. v. Temple University of the Commonwealth System of Higher
Education,  the Company filed suit against Temple. In January 1995, Temple filed
a separate  litigation  against the  Company.  If the  Company  were to lose its
claim, the Company would lose its investment to date in certain Oragen compounds
acquired pursuant to the Temple Agreement.  While not yet tested on humans these
Oragen  compounds  have the  potential  and  theoretical  advantage of having an
Ampligen-like effect upon oral administration. No assurance can be given that as
a result of such  loss,  Temple or its new  licensee,  if any,  would not become
competitors of the Company or that the  termination  of the licensing  agreement
will not have a materially  adverse  effect on the Company's long range business
or  financial  condition.  See "Risk  Factors--Disputes  and  Legal  Proceedings
Related to Patent Rights" and "Business--Legal  Proceedings" and "--Research and
Development, Licensing and Collaboration Agreements."

     The patent positions of pharmaceutical and biotechnology  firms,  including
the Company,  are  generally  uncertain  and involve  complex  legal and factual
questions.  Consequently,  even though the Company is currently prosecuting many

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<PAGE>

patent  applications with the U.S. and foreign patent offices,  the Company does
not know how many of its applications will result in the issuance of any patents
or,  of  patents  which  are  issued,  whether  they  will  provide  significant
proprietary  protection or will be  circumvented  or  invalidated.  Since patent
applications in the United States are maintained in secrecy until patents issue,
and since publication of discoveries in the scientific or patent literature tend
to lag behind actual  discoveries by at least several months, the Company cannot
be certain that it was the first  creator of the  inventions  covered by pending
patent  applications  or that it was the first to file patent  applications  for
such  inventions.  Competitors or potential  competitors  may have filed (or may
subsequently  file)  applications  for, and may obtain,  additional  patents and
proprietary rights relating to, compounds or processes competitive with those of
the Company.  Accordingly,  there can be no assurance that the Company's  patent
applications will result in patents being issued or, if issued, that the patents
will afford  protection  against  competitors with similar  technology;  nor can
there be any  assurance  that  others will not obtain  patents  that the Company
would need to license or circumvent.

     There  can be no  assurance  that any  patents  issued  or which may in the
future  be  issued  to the  Company  would be  upheld  by a court  of  competent
jurisdiction.  The Company also relies upon  unpatented  trade  secrets,  and no
assurance can be given that others will not independently  develop substantially
equivalent  proprietary  information  and techniques or otherwise gain access to
the Company's trade secrets or disclose such technology, or that the Company can
meaningfully protect its right to unpatented trade secrets. See "Risk Factors --
Uncertainty Regarding Patents and Proprietary Rights."

     The  Company  currently  requires  its  employees,   consultants,   outside
scientific collaborators and sponsored researchers and other advisors to execute
confidentiality  agreements  upon the  commencement  of employment or consulting
relationships  with the Company.  The Company  also has required  members of its
Scientific  Advisory Board to sign a confidentiality  agreement prior to each of
the last two annual meetings,  at which  confidential  information was provided.
The Company will continue this practice in the future.  These agreements require
that all confidential information made known to the individual during the course
of the individual's  relationship  with the Company be kept confidential and not
disclosed  to third  parties  except in specific  circumstances.  In the case of
employees,   the  agreements  provide  that  all  inventions  conceived  by  the
individual  shall be the  exclusive  property  of the  Company.  There can be no
assurance,  however, that these agreements will provide meaningful protection or
adequate  remedies for the Company's  trade secrets in the event of unauthorized
use or disclosure of such information.

     In connection with the 1994 Common Stock Financing, the Company agreed with
Bridge Ventures to collateralize  its patents until the earlier of the effective
date  of  this  Public  Offering  or  a  licensing   relationship  or  corporate
partnership  agreement with a third party which provides  significant  operating
capital and clinical  development  resources  for the Company.  Pursuant to this
arrangement,  the SAB  Agreement  has  resulted  in the  release of liens on the
Company's patents in the licensed territories. Bridge Ventures has also released
the patents  assigned or licensed to the  Company's  subsidiaries.  In addition,
upon consummation of this Public Offering,  the  collateralization of patents in
connection with the 1994 Common Stock Financing will be terminated.

     In  addition,  in May 1994,  a former  officer and director of the Company,
guaranteed  payment of two promissory  notes in the aggregate  amount of $76,000
payable by the Company  representing  payments due in connection with the Temple
licensing  agreement.  In return for the  guarantee,  the Company  assigned  its

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<PAGE>

rights, patents and related technology in certain RNA compounds to such officer,
which rights will revert to the Company upon  repayment of the  principal on the
notes, 12% interest, and certain fees and expenses which will be paid out of the
proceeds of this Public Offering. See "Use of Proceeds."

     In  addition,  in 1991,  Vanderbilt  University  advised the Company of its
position that employees of the  University  were the inventors of an issued U.S.
patent  regarding the use of Ampligen in  combination  with various other agents
(including AZT) for the treatment of HIV infection, a position which the Company
believes has no merit. See "Risk Factors--Disputes and Legal Proceedings Related
to Patent Rights" and "Business--Legal Proceedings."

Competition

     The  development  of  therapeutic  drugs for  human  disease  is  intensely
competitive. Many different approaches are being developed for the management of
diseases  targeted by the Company.  Certain  viral  diseases and cancers are the
targets for therapeutic product development at numerous entities,  many of which
have greater human and financial  resources dedicated to product development and
human clinical testing than the Company. In addition, Ampligen will compete with
conventional  drug therapy,  as well as other  modalities  of treatment  such as
biological and hormonal  therapies,  prophylactic  and therapeutic  vaccines and
surgery.  Competing products include interferon-alpha and thymosin for treatment
of HBV,  interferon-alpha  and ribavirin for treatment of HCV and  interleukin 2
for treatment of kidney cancer. Interferon, a drug that has been approved by the
FDA for the  treatment  of  chronic  HBV,  acts by an  immune  mechanism  and is
beneficial  in the  treatment  of HBV,  where  it will be  competitive  with the
Company's product.  However,  its efficacy has thus far not been demonstrated in
HIV,  ME/CFS  and the  primary  tumors and  indications  which the  Company  has
targeted.  The  Company  is also aware of a  European  firm which is  conducting
clinical  trials of an RNA drug for at least one indication  (HBV) for which the
Company is testing Ampligen.  This firm has also conducted pre-clinical research
of the drug as a possible treatment for HIV infection.  The Company is not privy
to further information regarding other competing drug development activities, if
any, of this potential  competitor.  Competing products for the treatment of HIV
disease include AZT, DDI, DDC, D4T, 3TC and three approved protease inhibitors.

     There are a number of other  companies  engaged in developing  nucleic acid
pharmeuticals.  The approach used by certain of such companies seeks to identify
specific proteins and /or nucleotide sequences associated with viral replication
or cell  dysfunction and to design molecules that will selectively bind to these
"target  sites" in order to  interfere  with the  production  or activity of the
specific  disease-causing  protein involved.  This is the method currently being
employed  by some  researchers  through  the use of  so-called  "antisense"  and
"triple-strand"  nucleic acid  technologies  which are the pre-clinical or early
clinical  testing  phase.  Such an approach  requires the design,  synthesis and
testing of numerous  compounds  for each disease or  indication  being  treated.
Although  no  assurances  can be  given,  the  Company  believes  its  RNA  drug
development  technology  has certain  advantages  over these other  technologies
because the Company  believes its drugs may  activate  cell  defenses  which may
convey broad-spectrum activity against various diseases.

     The  pharmaceutical  and biotechnology  industries are subject to rapid and
substantial technological change.  Technological competition from pharmaceutical
and  biotechnology  companies,  universities,  governmental  entities and others
diversifying  into the field is intense  and is expected  to  increase.  Most of
these entities have significantly greater research and development  capabilities

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<PAGE>

than the Company,  as well as  substantial  marketing,  financial and managerial
resources,  and represent significant competition for the Company.  Acquisitions
of, or investments in, competing  pharmaceutical and biotechnology  companies by
large  pharmaceutical  companies  as well as  collaborative  efforts  among such
companies  could  increase  such  competitors'  financial,  marketing  and other
resources. There can be no assurance that developments by others will not render
the Company's products or technologies  obsolete or noncompetitive,  or that the
Company will be able to keep pace with technological  developments.  Competitors
have developed or are in the process of developing  technologies that are, or in
the future may be, the basis for  competitive  products.  Some of these products
may  have  an  entirely   different  approach  or  means  of  accomplishing  the
therapeutic effect than products being developed by the Company. These competing
products  may be more  effective  and less costly than the  Company's  products.
Furthermore,  many  of the  Company's  competitors  have  significantly  greater
experience than the Company in pre-clinical testing and human clinical trials of
pharmaceutical  products  and in  obtaining  regulatory  approvals  of products.
Accordingly,   the  Company's  competitors  may  succeed  in  obtaining  product
approvals  more  rapidly  than the  Company.  If any of the  Company's  products
receive regulatory  approvals and the Company commences  commercial sales of its
products, it will also be competing with respect to manufacturing efficiency and
marketing  capabilities,  areas in which it has  limited or no  experience.  The
Company's   competitors  may  possess  or  obtain  patent  protection  or  other
intellectual  property rights that prevent,  limit or otherwise adversely affect
the Company's  ability to develop or exploit its products.  See "Risk Factors --
Uncertainty Regarding Patents and Proprietary Rights" and "Risk Factors -- Rapid
Technological Change and Substantial Competition."

Research and Development, Licensing and Collaboration Agreements

     In fiscal years 1992, 1993, 1994, 1995 and for the three months ended March
31, 1996, the Company expended $4,734,000,  $2,119,000, $1,638,000, $258,000 and
$299,000  respectively,  on research and  development,  consisting  primarily of
amounts spent on the clinical  testing and  development of Ampligen.  As part of
its research and  development  activities,  the Company has entered into various
collaborative and sponsored research  agreements with researchers,  universities
and government agencies.  The Company believes that these agreements provide the
Company with access to physicians and scientists with expertise in the fields of
clinical medicine,  virology,  molecular biology,  biochemistry,  immunology and
cellular biology.

     The  Company  has a  clinical  pharmacology  unit at  Hahnemann  University
Hospital in Philadelphia.  This clinical  pharmacology  unit performs studies on
Ampligen metabolism in the body, and initiates clinical trials at the Phase I/II
level.  The Company also plans to use this unit for its initial clinical studies
of Oragen drugs, subject to receipt of necessary clinical approvals.

     The Company does not own its own research and development or drug discovery
laboratories.  Instead,  employees of the Company's  collaborators conduct those
functions  at  the   laboratories  of  their   employers.   The  Company  has  a
long-standing  relationship with Hahnemann University,  which currently provides
laboratory  support in  conjunction  with licensing  arrangements  and financial
support from the Company. No assurances can be given that such relationship will
continue on terms advantageous to the Company, or at all.

     In June 1989, the Company  entered into an assignment and research  support
agreement (the "Hahnemann  Agreement")  with Hahnemann  University and Dr. David
Strayer,  Dr. Isadore  Brodsky and Dr. David  Gillespie who is now deceased (the

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<PAGE>

"Scientist Group"). Dr. Strayer is the Company's Medical Director.  Prior to the
execution of the Hahnemann  Agreement,  Hahnemann  and the  Scientist  Group had
participated  in the clinical  testing of  Ampligen.  In an effort to obtain the
benefits of the Scientist  Group's future  contributions  to the  development of
Ampligen  and obtain  exclusive  rights to certain  proprietary  and  regulatory
rights  relating to Ampligen,  the Company,  Hahnemann and the  Scientist  Group
entered into the Hahnemann  Agreement,  which provides (i) for the assignment by
Hahnemann  and the  Scientist  Group to the  Company of all of their  respective
rights in certain  proprietary  information which was then owned or subsequently
developed  and the  exclusive  and  perpetual  right to apply  for any  patents,
trademarks or copyrights relating to the proprietary  information;  (ii) for the
payment by the  Company to  Hahnemann  (and the  sharing  by  Hahnemann  and the
Scientist Group on such terms as they determine) of a royalty of 2% of net sales
proceeds (up to a maximum  royalty of $6 million per year) on all Ampligen  sold
by the Company or any entity licensed by the Company after the date of the grant
by the FDA of the first NDA for Ampligen  through January 1, 2005; (iii) for the
payment  by  the  Company  to  Hahnemann  of  $162,000  for  certain  scientific
consultative  support services to be performed by the Scientist Group during the
first year of the  Hahnemann  Agreement;  (iv) for the payment by the Company to
Hahnemann of certain  incremental  amounts for scientific  consultative  support
services to be rendered by the Scientist  Group  subsequent to the first year of
the Hahnemann  Agreement;  (v) that either party may  terminate  the  scientific
consultative  support  services  of  the  Scientist  Group  (and  the  Company's
obligations  to pay for those  services) on 90 days'  notice;  and (vi) that all
rights to discovery and inventions resulting from the Hahnemann Agreement are to
be the exclusive property of the Company.  The Company satisfied all amounts due
together with 8% annual  interest  calculable  from the due date of each payment
upon the Closing of the IPO.

     The  Company  has  entered  into  an  at-will  arrangement  with  Hahnemann
University, and Dr. Strayer, among others, pursuant to which the services of Dr.
Strayer,  among others,  are made available to the Company in return for monthly
salary  subsidization  payments  made  by the  Company  to the  University.  The
aggregate amount of these monthly payments is presently $14,896.

     In August  1988,  the Company  entered  into a  pharmaceutical  use license
agreement with Temple  University (the "Temple  Agreement").  Under the terms of
the Temple Agreement, Temple granted the Company an exclusive world-wide license
for the term of the agreement for the commercial  sale of Oragen  products using
patents and related technology held by Temple, which license is exclusive except
to the extent Temple is required to grant a license to any  governmental  agency
or  non-profit   organization  as  a  condition  of  funding  for  research  and
development of the patents and technology licensed to the Company. The rights to
such patents and related  technology had  previously  been assigned to Temple by
various parties,  including Dr. Robert J. Suhadolnik, an employee of Temple. The
Temple Agreement  provides (i) for the payment by the Company to Temple of 4% of
net sales of Oragen products the active ingredients of which consist entirely of
products,  processes or uses claimed by Temple's  patents and 2% of net sales of
Oragen products some, but not all, of the active ingredients of which consist of
products,  processes or uses claimed by Temple's patents, with minimum royalties
of $30,000 per year  commencing  in 1995;  (ii) that the  Company  must seek all
necessary  approvals for the commercial sale of Oragen products;  (iii) that the
Company  must  file an  application  for  marketing  approval  for at least  one
licensed  product with the FDA or a foreign  counterpart  on or before August 3,
1996; (iv) for the funding of specified  research  payments by the Company;  and
(v) that the Company shall have an exclusive option to negotiate for a period of

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<PAGE>

six months the terms of an  exclusive  license  for the  commercial  sale of any
future related  technology with respect to which Temple shall hold a patent. The
Temple Agreement expires upon the expiration of the last licensed patent, unless
sooner terminated by mutual consent,  upon the failure by the Company to pay any
required royalties or upon any material breach of the agreement. Dr. Suhadolnik,
as well as his  laboratory,  will derive income and  financial  support from any
royalties  paid by the Company.  The Company was notified by Temple in July 1994
that it  believed  the Company  was in breach of the Temple  Agreement  and that
Temple believed that the Temple Agreement was terminated.  The Company has filed
a lawsuit seeking a declaratory  judgement that the Temple Agreement  remains in
full force and effect and seeking monetary damages. Temple has filed a motion to
dismiss this lawsuit and in January 1995, Temple has filed a separate litigation
against the Company seeking  declaratory  judgment that the Temple Agreement has
been lawfully  terminated,  together with an award of costs,  including attorney
fees. See "Business--Legal  Proceedings" and "Risk  Factors--Disputes  and Legal
Proceedings Related to Patent Rights."

     In May  1992,  the  Company  entered  into a letter  agreement  to  provide
research payments to Dr. Werner E. Muller at the University of Mainz for various
exclusive 20-year  licensing  arrangements  including  certain  technologies for
genetic manipulation of the 2-5A pathway. The Company believes that the research
being conducted by Dr. Muller will provide general knowledge with respect to the
manipulation  of the cellular  mechanism by which  Ampligen  works.  The Company
agreed to make  quarterly  research  payments of $5,000 during the course of the
consultative  agreement,  which has no explicit  duration,  which  payments  are
presently accruing.

     In  addition  to the  arrangements  with Temple  University  and  Hahnemann
University described above, the Company has two types of collaborative  research
arrangements.   First,   the  Company  has  entered  into  "sponsored   research
arrangements"  with various  institutions  which  provide for the payment by the
Company of specified  financial  support to the  institutions  which conduct the
research.  Second,  the Company has entered  into  "collaborative  arrangements"
pursuant to which the institution  conducts studies of the Company's products at
the institution's  expense and gives the Company exclusive  commercial rights to
research results.  The Company provides its drugs to these  institutions free of
charge.   Collaborative  research  arrangements  provide  that  the  proprietary
knowledge is the sole property of the Company but permit the collaborator, after
a specified  time period,  to publish the results of its research in  scientific
medical  journals.  The  Company  has  research  agreements  with  the  National
Institute for Allergy and Infectious  Diseases on the use of Ampligen and Oragen
products in the treatment of HBV infection  and various  herpes and  respiratory
viruses and Hahnemann  University on the biochemical and molecular activities of
RNA. Other collaborators include the following entities or scientists therefrom:
the  National  Cancer  Institute,   Harvard  University  Medical  School,   Yale
University  Medical  School,  Vanderbilt  University,  University of Pittsburgh,
Howard  University,   Cornell  University,   Georgetown   University,   Stanford
University,  University  of  Pennsylvania,   Medical  College  of  Pennsylvania,
University of California at Davis and the Uniformed Services  University for the
Health Sciences.  International  collaborations include scientists from Konstanz
University  (Germany),  University  of Mainz  (Germany),  University  of Toronto
(Canada) and Juntendo University (Japan).

     The  Company  intends  to  continue  to  engage in such  collaborative  and
sponsored  research  with  selected  institutions.  There  can be no  assurance,
however,  that the Company will be able to maintain  its existing  collaborative
arrangements or enter into new collaborative arrangements.

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<PAGE>

Marketing

     The  Company  intends  to design its  marketing  strategy  to  reflect  the
differing health care systems around the world, and the different  marketing and
distribution  systems that are used to supply  pharmaceutical  products to those
systems.  In the United States,  the Company expects that, subject to receipt of
regulatory approval,  Ampligen will be used in three medical arenas: physicians'
offices or clinics,  the hospital and the home  setting.  The Company  currently
plans to use a service provider in the home infusion  (non-hospital)  segment of
the U.S.  market  to  execute  direct  marketing  activities,  conduct  physical
distribution of product and handle billings and  collections.  Accordingly,  the
Company is developing marketing plans to facilitate the product distribution and
medical  support for  indications,  if and when they are  approved . The Company
believes that this approach will  facilitate the generation of revenues  without
incurring the substantial costs associated with a sales force. Furthermore, this
approach  will enable the Company to retain  many  options for future  marketing
strategies.

     In September  1995, the Company entered into an agreement with Rivex Pharma
Inc., a Canadian-based pharmaceutical company ("Rivex"), pursuant to which Rivex
will provide various  services in connection with the exclusive  distribution of
Ampligen in Canada on an emergency drug release  basis.  Under the terms of this
agreement,  the Company will supply and Rivex will  purchase as much Ampligen as
necessary  to satisfy  Rivex's  customers  at a mutually  agreed  upon cost.  In
return, Rivex will retain the exclusive right to distribute Ampligen in Canada.

     In Europe, the Company plans to adopt a country-by-country  and, in certain
cases, an indication-by-indication,  marketing strategy due to the heterogeneity
of governmental regulations and alternative distribution systems in these areas.
The Company also plans to adopt an  indication-by-indication  strategy in Japan.
Subject to receipt of regulatory  approval,  the Company plans to seek strategic
partnering  arrangements  with  pharmaceutical  companies to facilitate  product
introductions  in  these  areas.  No  assurances  can be  given  that  any  such
arrangement  will be  entered  into on  terms  acceptable  to the  Company.  The
relative  prevalence of people  suffering from target  indications  for Ampligen
varies significantly by geographic region, and the Company intends to adjust its
clinical and marketing  planning to reflect the special needs of each area.  The
Company does not  currently  anticipate  devoting  significant  resources to the
establishment of an in-house sales force in the near term.

     In  countries  in South  America,  the  United  Kingdom,  Ireland,  Africa,
Australia,  Tasmania,  New Zealand, and certain other countries and territories,
the Company  contemplates  marketing its products through its relationship  with
SAB/Bioclones pursuant to the SAB Agreement. See "Business--General."

     The  Company is also  developing  a set of clinical  laboratory  diagnostic
products, trademarked Diagen products, that are designed to assist physicians in
identifying patients for the Company's RNA drug therapies and to assist in their
clinical  management  thereafter.  The Company believes that the availability of
such tests may lead to improved patient care and increased market penetration by
the Company's  therapeutic products, if and when such products are available for
commercial sale, although the Company does not anticipate  deriving  significant
revenues  directly from the commercial sale of Diagen products.  These tests are
at an early stage of development and the Company has received limited  royalties
in 1994 from its licensed  reference  laboratory in Texas.  The Diagen  products
would have to go  through a  regulatory  diagnostic  product  clearance  process

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<PAGE>

applicable to medical  devices prior to commercial  sale. In some cases,  use in
clinical   trials  may  require  FDA   clearances.   See   "Business--Government
Regulation"  below.  The  Company's  objective  is to  license  these  potential
products to a diagnostic  company.  The Company has granted rights to certain of
the  patents  related to the Diagen  products  to one of its  subsidiaries.  See
"Business--Subsidiary Companies."

Manufacturing

     Drug  intermediates  used in the production of Ampligen are manufactured to
order by Pharmacia Biotech, Inc. ("Pharmacia"),  a division of Pharmacia Upjohn,
Inc., a major multinational pharmaceutical company. In 1987, the Company entered
into an agreement  (the "Supply  Agreement")  with  Pharmacia  pursuant to which
Pharmacia agreed to supply and the Company agreed to purchase a specified amount
of drug intermediates and pay certain royalties to Pharmacia.  The provisions of
the Supply  Agreement  requiring the sup-  ply/purchase of compounds used in the
manufacture  of  Ampligen  expired in December  1992,  although  the  provisions
dealing  with the payment of royalties  survived.  Although the Company does not
currently  have a  written  agreement  with  Pharmacia  for the  supply  of drug
intermediates,  the Company believes that acceptable  alternative  sources exist
for the Company's present quantity requirements should the Company's arrangement
with  Pharmacia  terminate.  The Company  believes that it is not dependent on a
single source for any raw materials  used in the  manufacture  of Ampligen.  The
intermediates are analyzed by the Company for compliance with specifications and
then   transferred   to  a  contractor   which   formulates  the  Ampligen  drug
intermediates  under controlled  conditions to manufacture a freeze-dried dosage
form of  Ampligen.  The  Company  does not have a  written  agreement  with such
contractor.  The  freeze-dried  product is tested by the  Company  to  determine
compliance  with  a  set  of  technical   specifications.   Upon  meeting  these
specifications,  the product is  transferred to the Company and dosage units are
then prepared at the Company's Rockville, Maryland facility or at an appropriate
hospital  or other  pharmacy  facility.  Pharmacia  owns 9,216  shares of Common
Stock. In addition,  pursuant to the terms of the Supply Agreement,  the Company
agreed to pay the following royalties to Pharmacia: (a) for each substance based
on  Ampligen or related  RNA  compounds,  0.5% of net sales for 5 years from the
date of the first commercial sale (subject to a cap of $5 million per year and a
minimum of $60,000 per year for each  substance)  and (b) for each family of RNA
substances,  other than  substances  based on Ampligen or related RNA compounds,
0.5% of net  sales  for 5 years  from  the  date of the  first  commercial  sale
(subject  to a cap of $5 million  per year and a minimum of $60,000 per year for
each family of RNA substances). The obligation to pay royalties expires 12 years
from the date of the first royalty payment under the Supply Agreement.

     If necessary  regulatory  approvals  for  commercial  sale of a product are
obtained,  the Company's products must be manufactured in commercial  quantities
in compliance  with all  applicable  regulatory  requirements  and at acceptable
costs. The Company's  current  facilities and personnel are not adequate for the
production of its proposed products for large-scale commercialization. Moreover,
it is  not  likely  that  the  same  processes  can  be  used  successfully  for
commercial,  large scale production. Small changes in methods of manufacture may
affect  the  chemical  identity,  as well as the  safety  and  efficacy  of drug
products  such as Ampligen and other RNA drugs.  The Company  intends to utilize
third-party  facilities  or  if  it  is  unable  to  do  so,  build  or  acquire
commercial-scale  manufacturing  facilities and to add appropriate  personnel as
the need arises.

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<PAGE>

     Pursuant to the SAB Agreement,  the Company owns 24.9% of the capital stock
of a company which is  developing  and  operating a new  manufacturing  facility
South Africa built to FDA standards to produce the Company's RNA drugs.  A pilot
facility is currently being expanded. The Company expects that construction of a
commercial facility will commence in 1997 although the construction is dependent
upon the  regulatory  status of  Ampligen  in  various  global  markets,  and no
assurance can be given with respect to when, and if, construction will occur.

Government Regulation

     Overview.  Regulation by  governmental  authorities in the U.S. and foreign
countries is and will be a significant  factor in the  manufacture and marketing
of the  Company's  proposed  products  and in its ongoing  research  and product
development  activities.  All of the Company's proposed products and products of
its ongoing research and product development  activities will require regulatory
clearances prior to  commercialization.  In particular,  human new drug products
are subject to  rigorous  preclinical  and  clinical  testing as a condition  of
clearances  by the FDA and by  similar  authorities  in foreign  countries.  The
lengthy  process  of  seeking  these  approvals,  and  the  ongoing  process  of
compliance  with  applicable  statutes  and  regulations,  has required and will
continue to require the expenditure of substantial resources. Any failure by the
Company or its  collaborators or licensees to obtain, or any delay in obtaining,
regulatory  approvals  could  materially  adversely  affect the marketing of any
products  developed by the Company and its ability to receive product or royalty
revenue.

     The  Company  is also  subject to various  federal,  state and local  laws,
regulations  and  recommendations  relating  to such  matters  as  safe  working
conditions,  laboratory and  manufacturing  practices,  the  experimental use of
animals  and the use of and  disposal  of  hazardous  or  potentially  hazardous
substances,  including radioactive compounds and infectious disease agents, used
in connection  with the Company's  research work. The Company  believes that its
Rockville,  Maryland manufacturing and quality assurance/control  facility is in
substantial  compliance  with  all  material  regulations  applicable  to  these
activities.

     U.S. Regulatory Process. Before a new drug product may be sold commercially
in the  U.S.  and  other  countries,  clinical  trials  of the  product  must be
conducted and results submitted to the appropriate  regulatory  agencies as part
of the approval process.  The Company's  therapeutic and diagnostic products are
subject to  regulation  in the U.S.  under the Food,  Drug and Cosmetic Act (the
"FDC  Act").  Ampligen  and other RNA drugs will be reviewed as new drugs by the
FDA's Center for Drug Evaluation and Research ("CDER"), instead of as biological
products  which are  regulated  by FDA's  Center for  Biologics  Evaluation  and
Research  ("CBER").   Originally,   the  Company's  RNA  drugs  were  considered
biological  products subject to CBER jurisdiction.  As part of various memoranda
of  understanding  executed  recently among  different FDA  divisions,  however,
responsibility  for regulation of synthetic nucleic acids, such as the Company's
RNA drug  products,  including  Ampligen,  was  transferred in 1992 to the CDER.
Although  important  differences  exist  between the  regulation  of  biological
therapeutics and other drugs, the Company is unable to predict the impact of the
transfer of regulatory responsibility from CBER to CDER.

          (a) Drug Products.  The steps required  before a  non-biological  drug
     product  may be marketed in the U.S.  include  (a)  conducting  appropriate
     pre-clinical  laboratory  and animal  tests,  (b)  submitting to the FDA an
     application  for an  Investigational  New Drug  ("IND"),  which must become
     effective  before  human  clinical  trials  may  commence,  (c)  conducting

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<PAGE>



     well-controlled  human  clinical  trials  which  establish  the  safety and
     efficacy of the drug  product,  (d) filing a New Drug  Application  ("NDA")
     with  the FDA,  and (e)  obtaining  FDA  approval  of the NDA  prior to any
     commercial  sale or shipment of the drug.  In  addition  to  obtaining  FDA
     approval for each indication to be treated with each product, each domestic
     drug manufacturing  establishment must register with the FDA, list its drug
     products  with the FDA,  comply with current Good  Manufacturing  Practices
     ("GMP")  requirements  and be subject to  inspections  by the FDA.  Foreign
     manufacturing  establishments  also must comply with GMP requirements,  and
     are subject to periodic inspection by the FDA or by local authorities under
     agreement with the FDA.

     Pre-clinical tests include formulation  development,  laboratory evaluation
of product  chemistry  and animal  studies  to assess the  potential  safety and
efficacy of the product  formulation.  Drug  products  must be  manufactured  in
accordance with GMP  requirements  and  pre-clinical  tests must be conducted in
accordance with the FDA regulations  regarding Good  Laboratory  Practices.  The
results of the  pre-clinical  tests are  submitted to the FDA as part of the IND
and are reviewed by the FDA prior to authorizing the sponsor to conduct clinical
trials in human subjects.  Unless the FDA objects to an IND, the IND will become
effective 30 days  following its receipt by the FDA.  There is no certainty that
submission  of an IND will  result in FDA  authorization  to  commence  clinical
trials or that  authorization  of one phase of a clinical  trial will  result in
authorization  of other  phases  or that  clinical  trials  will  result  in FDA
approval.  Clinical  trials  may be  placed on hold by the FDA at any time for a
variety of reasons, particularly if safety or design concerns exist.

          (b)  Clinical  Testing  Requirements.   Clinical  trials  involve  the
     administration  of the  investigational  drug  product  to human  subjects.
     Clinical trials  typically are conducted in three phases and are subject to
     detailed protocols. Each protocol indicating how the clinical trial will be
     conducted  must usually be  submitted  for review to the FDA as part of the
     IND. The FDA's review of a study protocol does not  necessarily  mean that,
     if the study is successful, it will constitute proof of efficacy or safety.
     Further,  each clinical study must usually be conducted  under the auspices
     of an independent  Institutional  Review Board ("IRB") established pursuant
     to FDA  regulations.  The  IRB  considers,  among  other  factors,  ethical
     concerns, informed consent requirements,  and the possible liability of the
     hospital  conducting  the trials.  The FDA or IRB may require  changes in a
     protocol both prior to and after the  commencement of a trial.  There is no
     assurance  that the IRB or FDA will  permit a study to go forward  or, once
     started, to be completed.

     The three phases of clinical trials are generally  conducted  sequentially,
but they may  overlap.  In Phase I, the  initial  introduction  of the drug into
humans,  the  drug  is  tested  for  safety,  side  effects,  dosage  tolerance,
metabolism  and  clinical  pharmacology.  Phase  I  testing  for  an  indication
typically  takes at least one year to  complete.  Phase II  involves  controlled
tests in a larger but still limited patient population to determine the efficacy
of the drug  for  specific  indications,  to  determine  optimal  dosage  and to
identify  possible  side  effects  and safety  risks.  Phase II  testing  for an
indication  typically  takes at least from one and  one-half to two and one-half
years to complete.  If preliminary  evidence  suggesting  effectiveness has been
obtained during Phase II  evaluations,  expanded Phase III trials are undertaken
to gather the  additional  information  about  effectiveness  and safety that is
needed to evaluate  the  overall  benefit-risk  relationship  of the drug and to
provide an  adequate  basis for  physician  labeling.  Phase III  studies for an
indication  generally  take at least  from  two and  one-half  to five  years to
complete.  There can be no assurance that Phase I, Phase II or Phase III testing
will be completed successfully within any specified time period, if at all, with

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<PAGE>

respect to any of the  Company's  products  that have not yet completed any such
testing. Nor can there be any assurance that completion of clinical testing will
result in FDA approval.  Furthermore, the FDA may suspend clinical trials at any
time if the patients are  believed to be exposed to a  significant  health risk.
Phase III or other  clinical  studies may be conducted  after rather than before
approval under certain  circumstances.  For example, the FDA may determine under
its accelerated approval regulations that earlier studies,  involving the use of
surrogate markers rather than clinical outcomes, may establish an adequate basis
for drug  product  approval,  providing  that the  sponsor  agrees to conduct an
additional  study after approval to verify and describe the clinical  benefit of
the drug.  These and other similar  regulations,  however,  are often limited to
drug products that are intended to treat serious or  life-threatening  diseases,
especially those diseases for which there are no alternative therapies,  or that
provide meaningful therapeutic benefit to patients over existing treatments. The
Company  believes  that  Ampligen  may be  eligible  for review  under the FDA's
"accelerated  approval" or other similar  regulations  for certain  indications;
however,  the Company has not decided whether to seek such  accelerated or other
similar  approval and no assurances can be given that such  accelerated or other
similar approval, if sought, will be granted for any indication pursuant to such
regulations.

     In the case of drugs  for  life-threatening  diseases,  the  initial  human
testing is generally done on patients rather than on healthy volunteers. Because
these  patients are already  afflicted with the target  disease,  it is possible
that such studies may provide results traditionally obtained in Phase II trials.
These trials are referred to as Phase I/II trials.

     Reports of results of the  pre-clinical  studies  and  clinical  trials for
non-biological drugs are submitted to the FDA in the form of an NDA for approval
of the  marketing and  commercial  shipment.  The NDA also includes  information
pertaining to the  preparation  of drug  substances,  analytical  methods,  drug
product  formulation,  details on the manufacture of finished product as well as
proposed  product  packaging and labeling.  Submission of an NDA does not assure
FDA approval for marketing.  The application  review process generally takes two
to three years to complete,  although reviews of treatments for cancer and other
life-threatening diseases may be accelerated or expedited.  However, the process
may take  substantially  longer if, among other things, the FDA has questions or
concerns  about the safety  and/or  efficacy of a product.  In general,  the FDA
requires at least two properly conducted,  adequate and well-controlled clinical
studies demonstrating  efficacy with sufficient levels of statistical assurance.
However,  additional  information may be required. For example, the FDA also may
request  long-term  toxicity studies or other studies relating to product safety
or efficacy. Notwithstanding the submission of such data, the FDA ultimately may
decide  that the  application  does not  satisfy  its  regulatory  criteria  for
approval.  Finally,  the FDA may require additional clinical tests following NDA
approval to confirm product safety and efficacy (Phase IV clinical tests).

     Among  the  requirements  for  product  approval  is the  requirement  that
prospective  manufacturers conform to the FDA's GMP standards. In complying with
GMP standards,  manufacturers  must continue to expend time, money and effort in
production,  recordkeeping  and quality control to ensure that the product meets
applicable specifications and other requirements.  The FDA periodically inspects
drug manufacturing  facilities in order to ensure compliance with applicable GMP
requirements.  Failure to so comply  subjects the  manufacturer  to possible FDA
action,  such as the  suspension of  manufacturing,  seizure of the product,  or
voluntary recall of a product.

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<PAGE>

     The product  testing and approval  process is likely to take a  substantial
number of years and involves the expenditure of substantial resources. There can
be no assurance that any approval will be granted on a timely basis,  or at all.
The FDA also may require  post-marketing testing and surveillance to monitor the
record of the product and continued  compliance  with  regulatory  requirements.
Upon approval,  a drug may only be marketed for the approved  indications in the
approved dosage forms and at the approved dosages.  Adverse experiences with the
product must be reported to the FDA. The FDA also may require the  submission of
any lot of the product for  inspection  and may  restrict the release of any lot
that does not comply with FDA standards,  or may otherwise  order the suspension
of  manufacture,  recall or  seizure.  Product  approvals  may be  withdrawn  if
compliance with regulatory standards is not maintained or if problems concerning
safety or efficacy of the product occur following approval.

     In  addition  to  applicable  FDA  requirements,  the Company is subject to
foreign regulatory authorities governing clinical trials and drug sales. Whether
or not FDA approval has been  obtained,  approval of a product by the comparable
regulatory  authorities  of  foreign  countries  must be  obtained  prior to the
commencement  of  marketing  of the  product in those  countries.  The  approval
process  varies from  country to country and the time  required may be longer or
shorter than that required for FDA approval.

          (c)  Orphan  Drug  Status.  Under the  Orphan  Drug  Act,  the FDA may
     designate  drug  products as orphan  drugs if they are  intended to treat a
     rare disease or condition,  which is defined as a disease or condition that
     affects less than 200,000 persons in the U.S., or if there is no reasonable
     expectation of recovery of the costs of research and development from sales
     in the U.S. Provided certain conditions are met, orphan drug status confers
     upon the sponsor  certain  tax  credits  for  amounts  expended on clinical
     trials  prior to 1995,  as well as  marketing  exclusivity  for seven years
     following FDA approval of the product. Marketing exclusivity means that the
     FDA cannot approve another version of the same product for the same use for
     seven years after approval of the first product. However, the FDA can still
     approve a different  drug for the same use or the same drug for a different
     use. The FDA regulations implementing the Orphan Drug Act define what drugs
     are  the  "same"  for  purposes  of  the  seven  year  market   exclusivity
     provisions.  The  Company has been  advised  that  nucleic  acids and other
     complex drugs may present  potentially  difficult  orphan drug issues under
     these regulations.  The Company cannot predict how these provisions will be
     implemented with respect to its RNA products and competitive drugs. Certain
     benefits  of orphan  drug  status are only  available  upon  obtaining  FDA
     approval for marketing.  For example, orphan drug exclusivity only vests in
     the  same  designated  product  that is  first  to  receive  FDA  marketing
     approval. In 1993, Ampligen was designated as an orphan drug by the FDA for
     the clinical indications of AIDS and renal cell carcinoma. The Company does
     not believe that the former  designation  extends to HIV disease  which has
     not progressed to AIDS. In December 1993, the FDA designated Ampligen as an
     orphan drug for the clinical indications of invasive malignant melanoma and
     chronic  fatigue  syndrome.  The FDA has  recently  denied a request by the
     Company to  designate  Ampligen as an orphan  drug for  chronic  active HBV
     infection.  There is no  assurance  that any future  products  will receive
     orphan drug designation, or that the benefits currently available from such
     designations  for Ampligen  will not  hereafter  be amended or  eliminated.
     Various  legislative  proposals  have from time to time been  introduced in
     Congress to modify  various  provisions of the Orphan Drug Act.  Currently,
     Congress is  considering  legislation  that would amend the Orphan Drug Act

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<PAGE>

     and may limit the scope of marketing exclusivity. The tax credit provisions
     expired on December 31, 1994. No prediction can be made as to the effect of
     any such  proposed  legislation,  or any  other  legislation  which  may be
     introduced in the future, on the Company's operations.

          (d) Diagnostic  Products.  The Company's  potential Diagen  diagnostic
     products also must receive FDA clearance prior to any commercial marketing.
     The FDC Act regulates most in vitro diagnostic products as medical devices,
     and provides for two clearance mechanisms. Certain products may qualify for
     a Section 510(k)  procedure,  under which the manufacturer  gives the FDA a
     premarket  notification  ("510(k) Notice") of the manufacturer's  intent to
     commence  marketing the product.  The manufacturer  must establish that the
     product to be marketed is  "substantially  equivalent"  to another  legally
     marketed  product which is subject to a 510(k)  Notice or was  commercially
     marketed prior to May 28, 1976 and is not subject to premarket  application
     ("PMA") requirements. In some cases, a 510(k) Notice must include data from
     human  clinical  studies.  Normally,  marketing  may commence  when the FDA
     issues  an  order  to  the   manufacturer   finding   the   product  to  be
     "substantially  equivalent." If the product does not qualify for the 510(k)
     procedure,  the  manufacturer  must file a PMA which  includes  results  of
     extensive clinical and nonclinical tests  demonstrating that the product is
     both safe and effective.  The PMA process  requires more intensive  testing
     than the  510(k)  procedure,  involves  a  significantly  longer FDA review
     process,  and  usually  requires  review  by  an  FDA  scientific  advisory
     committee. Approval of a PMA allowing commercial sale of a product requires
     that its safety and  effectiveness  be demonstrated  through human clinical
     studies,  usually  conducted  under  an  Investigational  Device  Exemption
     ("IDE").  Some diagnostic  products may be clinically tested without an FDA
     approved IDE. It is unknown at this time whether an IDE will be required in
     order to clinically test Diagen  products.  In responding to a PMA, the FDA
     may grant marketing  approval,  request additional  information or deny the
     application  if it  determines  that the  application  does not satisfy its
     regulatory   approval   criteria.   There   can   be  no   assurance   that
     investigational  or marketing  approvals or clearances for Diagen  products
     will be granted to the Company.

     Canadian Regulatory  Process.  The regulatory approval process in Canada of
pre-clinical and clinical trials, manufacturing and sales of drugs, registration
of establishments which manufacture biologics,  compliance with GMP requirements
and periodic inspection by the HPB is, in general, similar to that in the United
States.

          (a) Investigational  New Drug Application.  Before conducting clinical
     trials of a new drug in Canada, a company must submit an IND application to
     the HPB containing  various  information  about the drug. In November 1992,
     the HPB approved the Company's  INDs to conduct  open-label  and controlled
     clinical trials of Ampligen for ME/CFS.  There is no assurance that the HPB
     will accept data obtained from those  clinical  trials in any submission of
     the Company to the HPB to market  Ampligen in Canada or that such data,  if
     accepted,  will result in the approval of Ampligen for sale in Canada.  The
     HPB may place clinical trials on hold at any time if safety concerns exist.

          (b) New Drug  Submission.  Before  marketing  or selling a new drug in
     Canada,  the Company must submit a New Drug  Submission  ("NDS") to the HPB
     and receive a notice of compliance  from the HPB to sell the drug.  The NDS

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<PAGE>

     includes  information  describing the new drug,  including its proper name,
     the proposed name under which the new drug will be sold, the specifications
     of the new drug, the methods of manufacturing, processing and packaging the
     new drug, the controls applicable to these operations,  the tests conducted
     to establish the safety of the new drug, the tests to be applied to control
     the potency,  purity,  stability and safety of the new drug, the results of
     clinical  trials  and  the  effectiveness  of the  new  drug  when  used as
     intended.  Submission  of an NDS does not assure HPB approval of a new drug
     for sale. If it determines the NDS meets the  requirements of Canada's Food
     and Drugs Act and  Regulations,  the HPB will issue a notice of  compliance
     for the new drug.

     The HPB may deny approval of an NDS if applicable  regulatory  criteria are
not  satisfied  or may require  additional  testing.  Product  approvals  may be
withdrawn  if  compliance  with  regulatory  standards is not  maintained  or if
problems  occur after the drug reaches the market.  The HPB may require  testing
and  surveillance   programs  to  monitor  the  new  drug  once  commercialized.
Non-compliance  with  applicable  requirements  can  result  in fines  and other
penalties, including product seizures and criminal prosecutions.

     Among the  requirements  for product  approval in Canada is the requirement
that a  prospective  manufacturer  conform to the HPB's GMP and good  laboratory
practices ("GLP")  standards.  Before  manufacturing a biologic,  a manufacturer
must have a license  from the HPB that is specific  to the site of  manufacture.
The HPB  periodically  inspects the drug  manufacturing  site in order to ensure
compliance  with  Canada's  Food and Drugs Act and  Regulations  and GMP and GLP
requirements. If there is a safety concern, the HPB, apart from other sanctions,
can suspend the manufacture of the product.

     Certain provinces in Canada have the ability to determine whether the costs
of a  drug  sold  within  such  province  will  be  reimbursed  by a  provincial
government  health  plan by  listing  drugs  on  formularies.  These  provincial
formularies  may affect the prices of drugs and the volume of drugs sold  within
provinces.  The Patented Medicines Prices Review Board has the ability to assess
whether the price of a patented  medicine is excessive  and, if determined to do
so, the Board has the ability to require the patent owner to reduce the price of
the patented  medicine,  to reduce the price of another patented  medicine or to
remit money to the government.

     Proposals have recently been made that, if implemented, would significantly
change Canada's drug approval system.  Proposals include establishing a separate
agency for drug  regulation and modeled on European  Community  agencies.  It is
uncertain  whether  drugs  such as the  Company's  would  be  evaluated  by this
separate agency, and the Company is unable to predict the impact, if any, on the
transfer of regulatory  responsibility  from the HPB to the separate agency. The
Company is unable to predict  whether these proposals will be implemented or, if
implemented, the effect thereof on the Company.

Properties

     The Company leases and occupies a total of approximately 18,850 square feet
of  laboratory  and office space in two states.  The corporate  headquarters  in
Philadelphia,  Pennsylvania  are located in a suite of offices of  approximately
15,000  square feet.  The  pharmacy,  packaging,  quality  assurance and quality
control  laboratories,  as well as  additional  office  space,  are  located  in
Rockville,  Maryland.  These facilities occupy  approximately 3,850 square feet,
approximately  2,000 of which are dedicated to the packaging and quality control
product release  functions.  The Company believes that its Rockville  facilities

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will  meet its  production  requirements,  including  sufficient  quantities  of
Ampligen for planned clinical trials, through 1996, at which time it may need to
increase its manufacturing  capacity either through third parties or by building
or acquiring commercial-scale facilities.

     In addition, the Company has entered into the SAB Agreement, which provides
the Company with 24.9% of the capital stock of a company which is developing and
operating a new manufacturing  facility  financed by SAB/Bioclones.  The Company
expects that manufacturing at this new facility will commence in 1996,  although
no  assurance  can be given  that this will  occur.  A  commercial  facility  is
expected to be built in 1997.

Legal Proceedings

     The Company was a defendant in a lawsuit instituted in 1991 by participants
in a  double-blind  placebo-controlled  clinical  trial of Ampligen  therapy for
ME/CFS.  The plaintiffs  alleged that the Company or its alleged agents promised
them that they would receive Ampligen after the  placebo-controlled  study at no
cost for periods  ranging  from  "until  marketable"  to "for life".  Plaintiffs
sought  compensatory  and  punitive  damages.  The court  granted the  Company's
motions for summary  judgment upon all claims  alleged by the plaintiffs in this
case.  The  plaintiffs  have appealed from these orders before the United States
Court of Appeals for the Ninth  Circuit.  In January 1996,  the Court of Appeals
denied their appeal and sustained the  Company's  position.  On the basis of the
Court of Appeals  favorable  decision,  the Company believes the lawsuit is over
with no material effect on the Company.

     In February 1991,  Vanderbilt Universit advised the Company of its position
that  employees of the  university  were the inventors of an issued U.S.  patent
regarding  the  use  of  Ampligen  in  combination  with  various  other  agents
(including  AZT) for the  treatment of HIV  infections.  As issued,  this patent
names the Company's Chief Executive  Officer as sole inventor and the Company as
sole assignee.  The  university has demanded that the patent be reissued  naming
the  university's  employees as inventors and the  university  as assignee.  The
Company  refused  to take such  action.  No formal  claim has been  filed by the
university. If such claim were field and if such claim were found to have merit,
the loss of the patent at issue would not have a  materially  adverse  effect on
the Company's  long-range  business since the  university  would only be able to
limit and/or prevent the Company's use of Ampligen in  combinations  with AZT in
the treatment of HIV.

     In  November  1994,  the  Company  filed  suit  against  Temple  University
("Temple")  in the Superior  Court of the State of Delaware  ("Superior  Court")
seeking a declaratory  judgment that the Temple Agreement  remains in full force
and effect and seeking  monetary  damages in excess of $10 million for  Temple's
alleged  breach of its  obligations  of good faith and fair  dealing and certain
terms of the Temple Agreement. Temple has filed a motion to dismiss this lawsuit
upon the grounds of lack of personal jurisdiction. In January 1995, Temple filed
separate  litigation  against  the  Company  in the  Court  of  Common  Pleas of
Philadelphia County seeking  declaratory  judgment that the Temple Agreement has
been  lawfully  terminated  as of July 1, 1994,  together with an award of costs
including  attorney fees, in bringing the action. The court of Common Please has
stayed  further  proceedings  in  the  litigation  pending  the  outcome  of the
Company's  Superior Court case. If the Company were to lose its claim,  the loss
of the licensing agreement could have a material adverse effect on the Company's
future business as Temple or its new licensees, if any, could become competitors
of the Company.

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     In March 1995, the Company instituted a declaratory judgment action against
the  February  1992  noteholder  of a $5 million  convertible  note and a second
defendant  in the United  States  District  Court for the  Eastern  District  of
Pennsylvania  (the  "Pennsylvania  action")  to declare  as void,  set aside and
cancel the February 1992 convertible note between the Company and the noteholder
(the"Note").  In addition, the noteholder instituted suit against the Company on
the Note in the  Circuit  Court of the 15th  Judicial  District  in and for Palm
Beach County, Florida,  seeking judgment on the note, plus attorneys fees, costs
and  expenses;  in August  1995,  this  action was stayed by the  Florida  Court
pending the outcome of the  Pennsylvania  action.  The  noteholder  also filed a
motion for a  preliminary  injunction  in the  Pennsylvania  court to enjoin the
Company from  disbursing the proceeds of a public offering in the amount of $5.8
million,  which motion was granted in November,  1995. On February 15, 1996, the
Company reached an agreement to settle this matter.  Terms and conditions of the
settlement  include  payment of $6,450,000  to the  noteholder to cover the note
balance and legal  expenses.  The noteholder and related parties are to maintain
certain Warrants that were granted prior to the lawsuit.  Other Warrants granted
to the noteholder in the note restructuring in 1994 were relinquished. The funds
under this settlement were paid on March 21, 1996. Mutual releases were executed
which completed the settlement of the litigation.

     The  Company  is  subject  to claims  and legal  actions  that arise in the
ordinary  course  of their  business.  Management  believes  that  the  ultimate
liability,  if any, with respect to these claims and legal actions will not have
a material  effect on the  financial  position or results of  operations  of the
Company.

     The Company is not currently a party to any other material litigation.

Employees and Consultants

     As of July 10,  1996,  the Company  had 15  full-time  employees.  Of these
employees,  10 either  conduct or support the Company's  research,  development,
manufacturing,  regulatory  affairs or preclinical  testing.  The remaining five
employees perform general  administrative  functions including financial matters
and investor  relations.  In addition,  as of July 10, 1996,  eight  individuals
employed  at  academic   institutions   served  as  consultants  or  independent
contractors  to the  Company.  Such  persons  are  paid  pursuant  to  licensing
agreements with two universities.  As of July 10, 1996, there were approximately
29 additional  individuals  who served as part-time  consultants  or independent
contractors to the Company. In addition, other individuals throughout the United
States from time to time are retained by the Company as independent contractors,
either on a per diem or monthly  basis.  The Company  believes  that it has been
successful in attracting skilled and experienced scientific personnel;  however,
competition for such personnel is intense and there can be no assurance that the
Company will be able to attract and retain necessary  qualified employees and/or
consultants  in the  future.  None of the  Company's  employees  is  covered  by
collective bargaining agreements.

Scientific Advisory Board

     The Company  established  its Scientific  Advisory Board in March 1991. The
Scientific  Advisory Board consists of individuals who the Company believes have
particular expertise in immunology, virology, pharmacology, cancer therapeutics,
biochemistry  and related  fields.  These  individuals  advise the Company about
present  and  long-term  scientific  planning,  research  and  development.  The

                                       63


<PAGE>

Scientific  Advisory  Board holds  annual  meetings as required by the  clinical
studies in progress by the Company. In addition,  individual Scientific Advisory
Board members sometimes consult with, and meet informally with, employees of the
Company on a more frequent basis.  All members of the Scientific  Advisory Board
are employed by employers other than the Company and may have commitments to, or
consulting and/or advisory agreements with, other entities,  including potential
competitors of the Company,  that may limit their  availability  to the Company.
The time spent by Scientific  Advisory  Board  members on the Company's  affairs
varies.  Although individual members of the Scientific Advisory Board may devote
significant time and energy to the affairs of the Company, no member is expected
to devote more than a small  portion of his time to the Company.  Members of the
Scientific  Advisory  Board  are  compensated  at a rate of $1,500  per  meeting
attended or day  devoted to Company  affairs.  In  addition,  Doctors  Cheng and
Brodsky  have been granted  options to acquire  4,608 and 5,253 shares of Common
Stock,  respectively,   at  exercise  prices  of  $4.34  and  $1.06  per  share,
respectively.  As  described  elsewhere  herein,  Dr.  Brodsky is a party to the
Hahnemann  Agreement,  pursuant  to  which he is  entitled  to  receive  certain
royalties from the Company with respect to sales of Ampligen.  See "Research and
Development, Licensing and Collaboration Agreements."

     The  following  information  is  furnished  with  respect to members of the
Scientific Advisory Board:

<TABLE>
<CAPTION>

NAME                                POSITIONS                                           INSTITUTION
- ----                                ---------                                           -----------

<S>                                 <C>                                                 <C>
Isadore Brodsky, M.D.               Professor of Medicine and Head,                     Medical College of
                                    Division of Hematology/Oncology                     Pennsylvania
                                                                                        and Hahnemann
                                                                                        University
                                                                                        School of Medicine,
                                                                                        Philadelphia, Penn-
                                                                                        sylvania

Yung-Chi Cheng, Ph.D.               Director, Developmental Therapeutics/               Yale University School of
                                    Chemotherapy Program                                Medicine, New Haven,
                                                                                        Connecticut

                                    Professor of Pharmacology and                       Yale University
                                    Comprehensive Internal Medicine                     Center, New Haven,
                                                                                        Connecticut

Clyde Crumpacker, M.D.              Professor of Medicine                               Harvard Medical School,
                                                                                        Boston, Massachusetts

                                    Physician                                           Harvard Medical School,
                                                                                        Brigham & Women's
                                                                                        Hospital,
                                                                                        Beth Israel Hospital,
                                                                                        Boston, Massachusetts

Robert A. Good, Ph.D.               Distinguished Professor                             Departments of Pediatrics
                                    and M.D., D.Sc.                                     Microbiology, University
                                                                                        of South Florida, Tampa,
                                                                                        Florida

                                    Physician-in-Chief                                  All Children's Hospital,
                                                                                        St. Petersburg, Florida
</TABLE>

                                       64


<PAGE>

<TABLE>
<CAPTION>


<S>                                 <C>                                                 <C>
James Greene, Ph.D.                 Associate Professor of Biology                      Catholic University,
                                                                                        Washington, D.C.

Anthony L. Komaroff, M.D.           Professor of Medicine,                              Harvard Medical School,
                                    Chief, Division of General Medicine                 Brigham & Women's
                                                                                        Hospital,
                                                                                        Boston, Massachusetts

William Mitchell, M.D.,
 Ph.D                               Professor of Pathology                              Vanderbilt School of
                                                                                        Medicine,
                                                                                        Nashville, Tennessee

Phillip Roane, P  h.D.              Associate Professor of                              Howard University,
                                    Microbiology                                        Washington, D.C.

Kenny DeMeirleir, M.D.,
 Ph.D.                              Professor of Medicine                               Vrije Universiteit,
                                                                                        Brussels, Belgium
</TABLE>

Data Safety Monitoring Board

     Because  the  Company  periodically  conducts  placebo-controlled  clinical
studies  in  chronic  incurable  diseases,  it  has  designated  a  Data  Safety
Monitoring  Board  comprised of independent  physicians,  scientists and patient
advocates.  During the  conduct of a  placebo-controlled  clinical  trial  (i.e.
involving the use of placebo for certain  patients  involved in the trial),  the
Data Safety Monitoring Board meets at  pre-determined  intervals to evaluate the
safety,  efficacy  and/or ethical  implications of a  placebo-controlled  trial.
Members of the Data Safety  Monitoring Board are compensated at a rate of $1,500
per meeting attended. Members are not allowed to hold stock in the Company.

     The following are members of the Data Safety Monitoring Board:

<TABLE>
<CAPTION>

NAME                                POSITIONS                                   INSTITUTION
- ----                                ---------                                   -----------
<S>                                 <C>                                         <C>
Robert A. Good, M.D.,               Distinguished Professor                     Departments of Pediatrics and
Ph.D., D.Sc.                        Microbiology,                               University of South Florida,
                                                                                Tampa, Florida

                                    Physician-in-Chief                          All Children's Hospital,
                                                                                St. Petersburg, Florida

Lewis Marshall, M.D.                Associate Professor of Medicine             Howard University College of
                                                                                Medicine, Washington, D.C.
                                    Chief, Infectious Diseases                  Providence Hospital,
                                                                                Washington, D.C.
                                    Chief, Infectious Diseases                  Columbia Hospital for Women,
                                                                                Washington, D.C.

The Rev. Daniel Paul
Matthews D.D.                       Rector                                      Parish of Trinity Church,
                                                                                Wall Street, New York

Kenny DeMeirleir, M.D.,
 Ph.D.                              Professor of Medicine                       Vrije Universiteit,
                                                                                Brussels, Belgium
</TABLE>
                                       65


<PAGE>

                                   MANAGEMENT

Directors, Executive Officers and Key Employees

     The  Directors,  executive  officers,  key  employees  and  advisors of the
Company are as follows:

         Name                Age     Position
         ----                ---     --------
William A. Carter, M.D.      59      Chairman, Chief Executive Officer,
President

R. Douglas Hulse             52      Chief Operating Officer

Robert E. Peterson           59      Chief Financial Officer

David R. Strayer, M.D.       50      Medical Director, Director of Regulatory
                                      Affairs

Carol A. Smith, Ph.D.        45      Director of Manufacturing and Process
                                      Development

Josephine M. Dolhancryk      33      Treasurer, Assistant Secretary

Cedric C. Philipp            74      Director, Associate Secretary, Special
                                      Advisor to the Board/International

Richard C. Piani             69      Director

Peter W. Rodino III          43      Director, Secretary

Harris Freedman              61      Vice President, Corporate Communications

Sharon D. Will               36      Vice President, Investor Relations
                                     
E. Gerald Kay                58      Director

William A. Carter,  M.D.,  the  co-inventor  of Ampligen,  joined the Company in
1978,  and has served as (a) the Company's  Chief  Scientific  Officer since May
1989,  (b) the Chairman of the Company's  Board of Directors  since January 1992
(c) the Company's  Chief  Executive  Officer since July 1993,  (d) the Company's
President  since April,  1995, and (e) a director since 1987. From 1987 to 1988,
Dr. Carter served as the Company's Chairman.  Dr. Carter was a leading innovator
in the  development of human  interferon for a variety of treatment  indications
including  various viral diseases and cancer.  In this context,  he received the
first FDA  approval to initiate  clinical  trials on a beta  interferon  product
manufactured in the U.S. under his  supervision.  From 1985 to October 1988, Dr.
Carter served as the Company's Chief Executive  Officer and Chief Scientist.  He
received his M.D.  degree from Duke  University and underwent his  post-doctoral

                                       66


<PAGE>

training at the National Institutes of Health and Johns Hopkins University.  Dr.
Carter also serves as Professor of Neoplastic Diseases at Hahnemann  University,
a position he has held since 1980. He is also Director of Clinical  Research for
Hahnemann  University's  Institute for Cancer and Blood Diseases. Dr. Carter has
served as a professor at Johns Hopkins School of Medicine,  Hahnemann University
and the State University of New York at Buffalo.

R. Douglas Hulse was named Chief Operating  Officer on June 1, 1996.  Since July
1995, he had been Special  Advisor for Licensing and New Product  Development to
the Company's Board of Directors. Since 1995 he has served as Executive Director
of The Sage Group, a health care consulting firm  specializing in pharmaceutical
and biotechnology business development and strategic planning.  Between 1991 and
1994, Mr. Hulse was Vice President of Business  Development  for Enzon,  Inc., a
biopharmaceutical company with proprietary drug delivery technologies,  and from
1986 to  1991,  Mr.  Hulse  served  as an  independent  financial  and  business
development consultant to various biotechnology  companies. He was President and
CEO of i-STAT Corporation,  a manufacturer of medical  biosensors,  from 1984 to
1986 and Vice  President of Strategic  Planning for Engelhard  Corporation  from
1982  to  1984.  Mr.  Hulse  held  several   executive   positions  with  Halcon
International,  Inc., a leading chemical  company,  from 1968 to 1982. Mr. Hulse
received  Masters  degrees in  Industrial  Management  and Chemical  Engineering
Practice  from  M.I.T.  and a  Bachelors  degree  in  Chemistry  from  Princeton
University.

Robert E.  Peterson has served as Chief  Financial  Officer of the Company since
April 1993 and served as an  independent  financial  advisor to the Company from
1989 to April 1993. Mr. Peterson has also served since 1990 as Vice President of
the Omni Group,  Inc.,  a business  consulting  group based in Tulsa,  Oklahoma.
During the period  1983  through  1992,  Mr.  Peterson  was  self-employed  as a
financial consultant to businesses in various industries.  Mr. Peterson was Vice
President and Chief Financial Officer of Pepsico Foods  International  from 1979
to 1983 and responsible for financial management of this multinational operating
unit with  approximately  $500  million in annual  revenues.  Mr.  Peterson is a
graduate of Eastern New Mexico University.

David R. Strayer,  M.D., who serves as Professor of Medicine at Medical  College
of Pennsylvania and Hahnemann  University,  has acted as the Medical Director of
the Company since 1986. He is Board  Certified in Medical  Oncology and Internal
Medicine  with  research  interests  in the fields of cancer  and immune  system
disorders. Dr. Strayer has served as principal investigator in studies funded by
the Leukemia Society of America,  the American Cancer Society,  and the National
Institutes  of  Health.  Dr.  Strayer  attended  the School of  Medicine  at the
University of California at Los Angeles where he received his M.D. in 1972.

Carol A. Smith,  Ph.D. has served as the Company's Director of Manufacturing and
Process  Development  since April 1995, as Director of Operations since 1993 and
as the Manager of Quality Control from 1991 to 1993, with responsibility for the
manufacture,  control  and  chemistry  of  Ampligen.  Dr.  Smith  has also  been
Scientist/Quality  Assurance Officer for Virotech International,  Inc. from 1989
to 1991 and Director of the Reverse  Transcriptase  and Interferon  Laboratories
and a Clinical  Monitor for Life Sciences,  Inc. from 1983 to 1989. She received
her Ph.D.  from the University of South Florida  College of Medicine in 1980 and
was an NIH post-doctoral  fellow at the Pennsylvania State University College of
Medicine.

Josephine  M.  Dolhancryk  joined  the  Company in 1990 as Office  Manager,  was
promoted to Executive Assistant to the Chairman of the Board and Chief Executive


                                       67


<PAGE>

Officer in 1991 and Assistant Secretary,  Treasurer and Executive  Administrator
in 1995.  From 1989 to 1990 Ms.  Dolhancryk  was  President of  Medical/Business
Enterprises.  Ms. Dolhancryk was employed by Children's Hospital of Philadelphia
from 1984 to 1989, where she also served as research coordinator on a drug study
from  1986 to 1988.  Ms.  Dolhancryk  attended  Saint  Joseph's  University  and
Delaware County College.

E. Gerald Kay has served as a director of the Company since July 1994. From 1980
through the present,  he has served as Chairman of the Board and Chief Executive
Officer of Manhattan Drug Co., Inc. a provider of manufacturing  services to the
nutritional supplement industry, Chem International, Inc., the parent company of
Manhattan Drug Co., Inc., The Vitamin  Factory,  Inc. a retailer and direct mail
of nutritional products, and Connaught Press, a publisher. From 1993 to date, he
has served as a Director of Carte Medical Corp.  From 1986 to 1988,  Mr. Kay was
President and a director of the Rexall Group,  Inc. and from 1993 to 1994 served
as a  consultant  to Rexall  Sundown in the  establishment  of a  pharmaceutical
manufacturing  facility. Mr. Kay attended the University of Vermont and New York
University from 1961 to 1963.

Cedric C. Philipp has served as a director of the Company since July 1994 and as
Special  Advisor for  International  Marketing  since 1993.  He is  President of
Philipp  Pharmaceutical  Marketing,  a consulting firm which he founded in 1987.
From 1957 to 1987, he was with Wyeth International,  a division of American Home
Products,  during which time he served in various  capacities  in  international
marketing and sales, most recently as Executive Assistant to the President.  Mr.
Philipp  received  his A.B.  degree from  Columbia  College  and later  attended
Columbia Law School and the Graduate School of Princeton University.

Richard C. Piani has served as a director  of the  Company  since May 1995.  Mr.
Piani has been  employed as a  principal  delegate  for  Industry to the City of
Science and Industry, Paris, France, a billion dollar scientific and educational
complex since 1995. Mr. Piani provided  consulting to the Company in 1993,  with
respect to general business strategies for the Company's European operations and
markets.  He served as Chairman of  Industrielle du  Batiment-Morin,  a building
materials  corporation,  from  1986 to  1993.  Previously  he was  Professor  of
International Strategy at Paris Dauphine University from 1984 to 1993. From 1979
to 1985 Mr.  Piani  served as Group  Director  in Charge  of  International  and
Commercial  Affairs for  Rhone-Poulenc  and from 1973 to 1979 was  Chairman  and
Chief  Executive  Officer of Societe "La  Cellophane",  the French company which
invented  cellophane and several other worldwide  products.  Mr. Piani has a Law
degree from  Facilite de Droit,  Paris  Sorbonne  and a Business  Administration
degree from Ecola des Hautes Etudes Commerciales, Paris.

Peter W. Rodino III has served as a director of the Company  since July 1994 and
Secretary of the Company since November  1994. He had  previously  served on the
Company's Board of Directors from 1987 to 1989. From 1988 through the present he
has  served  as  Managing  Partner  of the law firm  Rodino  and  Rodino,  which
primarily deals in corporate, commercial, insurance, real estate, environmental,
bankruptcy and  immigration  law. He was a partner in the law firm of Rodino and
Scalera,  Inc.  from 1988 to 1991.  He has  served as  Chairman  of the Board of
Directors  of the  Foundation  Health Plan of New Jersey,  an IPA/HMO  providing
health care services,  from 1983 to 1988 and as a Director of Columbus  Hospital
from 1986 to 1990.  Mr.  Rodino  earned a B.S. in Business  Administration  from
Georgetown  University in 1973 and a J.D. from Seton Hall  University  School of
Law in 1976.

                                       68


<PAGE>

Harris  Freedman has served as Vice  President  for  Strategic  Alliances  since
August 1994 and has been a private  venture  capitalist and business  consultant
for more than the past five years. He is the Secretary of Bridge Ventures,  Inc.
("Bridge  Ventures") and SMACS Holding Corp.,  both of which are private venture
capital companies,  positions he has held for more than five years. His business
experience has encompassed  developing  significant business contacts and acting
as an officer or director of several  companies  in the  pharmaceutical,  health
care and entertainment  fields.  Mr. Freedman was Vice President of U.S. Alcohol
Testing of America,  Inc., from August 1990 to February 1991.  Additionally,  he
was Vice  President--East  Coast  Marketing for  MusicSource  U.S.A.,  Inc. from
October 1992 to January 1994. Mr.  Freedman  attended New York  University  from
1951 to 1954.

Sharon D. Will has been Vice President for Corporate Communications and Investor
Relations  since November 1994.  Prior to that time, she was a registered  sales
representative  and Senior Vice President for  Institutional  Sales at Westfield
Financial  Corporation from September 1994 to October 1994. She was a registered
sales  representative  with Marsh Block  Corporation from July 1994 to September
1994.  From  October  1993  to  July  1994  she  served  as a  registered  sales
representative  at Seaboard  Securities Corp. From October 1991 to present,  Ms.
Will  has  been  President  of  Worldwide   Marketing   Inc.  a   manufacturers'
representative  of various  companies  selling to the retail trade markets.  Ms.
Will was the National Sales Manager of Innovo, Inc., a domestic  manufacturer of
textiles,  from October 1989 to November 1991. She attended Baylor College as an
undergraduate for two years with a primary focus on chemistry.

Board Committees

     The Board of  Directors  maintains  an Executive  Committee  consisting  of
William A.  Carter and Peter W.  Rodino  III,  which  makes  recommendations  to
management  regarding  general business  matters of the Company;  a Compensation
Committee consisting of Peter W. Rodino III, Richard C. Piani and E. Gerald Kay,
which makes  recommendations  concerning salaries and compensation for employees
of and consultants to the Company;  an Audit  Committee  consisting of Cedric C.
Philipp and E. Gerald Kay,  which reviews the results and scope of the audit and
other  services  provided by  independent  auditors;  and a  Strategic  Planning
Committee  consisting  of William A.  Carter,  Peter W. Rodino III and Cedric C.
Philipp,  which  makes  recommendations  to  the  Board  of  priorities  in  the
application of the Company's  financial assets and human resources in the fields
of research, marketing and manufacturing.

Compensation of Directors

     During  the fourth  quarter of fiscal  1995,  each  non-employee  directors
received  $3,750 as  compensation  for serving on the Board of  Directors or any
committee  thereof.  Certain  non-employee  directors  receive  compensation  as
consultants  to the Company  and have been  granted  options to purchase  Common
Stock  under the  Company's  1990 Stock  Option  Plan and Rule 701  Warrants  to
purchase  Common Stock of the Company.  All of the directors are  reimbursed for
their expenses incurred in attending  meetings of the Board of Directors and its
committees.  Currently,  non-management  directors receive an annual retainer of
$15,000 and receive  $600 for each Board or  committee  meeting  they attend and
will be reimbursed for out of pocket  expenses  incurred in attending  meetings.
The Company  believes  such  payments are  necessary in order for the Company to
attract and retain qualified outside directors.

                                       69

<PAGE>

     In addition,  in October 1994, the Board of Directors  granted to Cedric C.
Philipp,  a  director  of the  Company  and  Special  Advisor  to the  Board for
International  Marketing,  the right to receive 3% of the gross  proceeds of any
licensing fees and prepaid royalties received by the Company pursuant to the SAB
Agreement  and a fee of .75% of gross  proceeds in the event that  SAB/Bioclones
makes a tender  offer  for all or  substantially  all of the  Company's  assets,
including a merger,  acquisition or related transaction,  and 1% of all products
manufactured by SAB/Bioclones.  The Company may prepay in full the obligation to
provide commissions up to $1,050,000 within a ten year period. These rights were
granted to Mr.  Philipp in exchange for his services in the  negotiation  of the
SAB  Agreement  and his  services  in  connection  with  various  marketing  and
licensing opportunities for the Company. In addition, the Company further agreed
to  provide  a  monthly  retainer  of  $2,000 to Mr.  Philipp  in  exchange  for
consulting   services  related  to  general   pharmaceutical  and  international
marketing   services  and  remuneration   for  corporate   alliances  which  are
principally  introduced  by Mr.  Philipp.  Mr.  Philipp  has been paid  $110,000
pursuant to these arrangements through December 31, 1995.

     In June 1995,  the Board of Directors  of  BioAegean,  a subsidiary  of the
Company,  issued an aggregate of 550,000  BioAegean Options at an exercise price
of $1.00 per share to Dr.  William A. Carter,  E. Gerald Kay,  Cedric C. Philipp
and Peter Rodino, III, directors of the Company.

     In October and November 1994, the Company granted an aggregate of 1,480,000
Rule 701  Warrants to purchase  shares of Common Stock at $3.50 per share to Dr.
Carter,  Mr. Kay, Mr.  Philipp and Mr.  Rodino,  directors  of the Company,  and
Maryann  Charlap  Azzato  a  former  director  of  the  Company.   See  "Certain
Transactions."

     In 1994 and 1993 the Company  issued shares of Series C Preferred  Stock at
$5.00 per share to certain directors in various  transactions  including certain
sales of Series C Preferred  Stock and  conversion of certain debt. See "Certain
Transactions."

                                       70

<PAGE>

Executive Compensation

     Summary   Compensation  Table.  The  following  table  sets  forth  certain
information  with respect to the  compensation  of the Company's Chief Executive
Officer and the other most highly compensated  executive officers of the Company
for the fiscal year ended December 31, 1995.

                             EXECUTIVE COMPENSATION
                           SUMMARY COMPENSATION TABLE
<TABLE>
<CAPTION>

Name and                                                       Other Annual      Restricted Stock     Awards          All other
Principal Position                  Year    Salary            Compensation($)(1)    Awards($)(13)     Option      Compensation($)(2)
- ------------------                  ----    ------            ------------------  ----------------    ------      ------------------
                                                              
<S>                                 <C>     <C>                     <C>                  <C>       <C>                 <C>  
William A. Carter                   1995    $363,420 (3)(4)         --                   --         300,000 (8)         7,778
  Chairman of the Board             1994     363,420 (3)(5)         --                   --       1,400,000 (9)         7,778
  Chief Executive Officer           1993     363,420 (3)            --                   --           --                7,778
                                                                                                                   
Robert E. Peterson                  1995     120,000 (6)            --                   --          50,000 (10)          --
  Chief Financial Officer           1994     110,000 (7)            --                   --           --           
                                    1993      86,300                --                   --           --                  --
                                                                                                                   
Sharon Will                         1995     125,000                --                   --          50,000 (10)          --
  Vice President                    1994       --                   --                   --         200,000 (11)          --
                                    1993       --                   --                   --           --                  --
                                                                                                                   
David R. Strayer, M.D.              1995     115,083                --                   --           --                  --
  Medical Director                  1994       --                   --                   --           --                  --
                                    1993       --                   --                   --           --           
                                                                                                                   
Harris Freedman                     1995     112,500                --                   --         150,000 (10)          --
  Vice President                    1994       --                   --                   --         400,000 (12)          --
                                    1993       --                   --                   --           --                  --
</TABLE>
                                                           

(1)  The Company makes available certain  non-monetary  benefits to its officers
     with  a  view  to  attracting   and  retaining   qualified   personnel  and
     facilitating  job  performance.  The Company  considers such benefits to be
     ordinary and incidental business costs and expenses. The aggregate value of
     such benefits, which cannot be precisely ascertained but which is less than
     10% of the cash compensation of each of the above-named executive officers,
     is not included in the table.

(2)  Consists of  insurance  premiums  paid by the Company  with respect to term
     life insurance for the benefit of the named executive officer.

(3)  Includes $63,000 paid to Dr. Carter by Hahnemann University where he serves
     as a professor.

(4)  Does not include  $224,015  paid in 1995 for salary  deferred from 1993 and
     1994.

                                       71


<PAGE>

(5)  Includes $137,692 in deferred salary for 1994.

(6)  Mr.  Peterson  joined the Company in April 1993 and is paid on a fee basis.
     Compensation includes $25,625 in deferred salary for 1995.

(7)  Includes $33,500 in deferred salary for 1994.

(8)  BioAegean  Options to purchase  300,000 shares of common stock of BioAegean
     Corp., a subsidiary of the Company,  at $1.00 per share, which were granted
     in May 1995 (the "BioAegean Options").

(9)  Rule 701 Warrants to purchase  Common  Stock at $3.50 per share  granted in
     October  1994.  These Rule 701 Warrants  vest in 1/3  increments  over a 36
     month period. Rule 701 Warrants are warrants which were issued to officers,
     directors and  consultants  of the Company in reliance upon Rule 701 of the
     Act.

(10) BioAegean Options.

(11) Rule 701 Warrants to purchase  common  stock at $3.50 per share  granted in
     November 1994.

(12) Rule 701 Warrants to purchase  common  stock at $3.50 per share  granted in
     August 1994.

(13) As of December 31, 1995,  Sharon Will had 100,000  shares of 144 restricted
     stock valued at $228,125  using the average  closing bid and asked price on
     December 31, 1995 of $2.28.  As of December 31, 1995,  Harris  Freedman had
     150,000  shares of Rule 144  restricted  stock valued at $342,000 using the
     average closing bid and asked price on December 31, 1995 of $2.28.

                                       72


<PAGE>

     Year End Option Table.  The following table sets forth certain  information
regarding  the stock  options  held as of December  31, 1995 by the  individuals
named in the above  Summary  Compensation  Table.  David  Strayer,  M.D. did not
exercise any stock options in the last fiscal year.

                 AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                        AND FISCAL YEAR-END OPTION VALUE

<TABLE>
<CAPTION>
                                                                 Securities Underlying                Value of Unexercised
                                                                Unexercised Options at                In-the-Money-Options
                                                                   Fiscal Year End(#)                 at Fiscal Year End ($)
                        Shares Acquired      Value            -----------------------------      ---------------------------
  Name                  on Exercise (#)      Realized ($)     Exercisable    Unexercisable       Exercisable       Unexercisable
- ------                  ---------------      ------------     -----------    -------------       -----------       -------------

<S>                          <C>                 <C>          <C>            <C>                   <C>                   
William A. Carter            --                 --            1,091,355(1)    1,233,333(2)          292,188            --
Robert E. Peterson           --                 --                6,912(3)       56,912(4)            ---              --
Sharon Will                  --                 --              341,667(5)      283,333(6)          146,094            --
Harris Freedman              --                 --              975,494(7)      416,667(8)          292,188            --

</TABLE>

- ----------
(1)  Includes (i) 466,667  currently  exercisable  Rule 701 Warrants to purchase
     Common  Stock at $3.50 per share;  (ii)  73,728  stock  options to purchase
     Common  Stock at $3.50 per share;  (iii) 960  warrants to  purchase  Common
     Stock at $3.50 per share;  and (iv) warrants to purchase  550,000 shares of
     Common Stock at $1.75 per share.

(2)  Includes 933,333 Rule 701 Warrants and 300,000 BioAegean Options.

(3)  Stock options to purchase Common Stock at $4.34 per share.

(4)  Includes 50,000 BioAegean Options and 6,912 stock options.

(5)  Includes  66,667  currently  exercisable  Rule  701  Warrants  and  275,000
     warrants to purchase Common Stock at $1.75 per share.

(6)  Includes 150,000 BioAegean Options and 133,333 Rule 701 Warrants.

(7)  Includes (i) 133,333 Rule 701 Warrants currently exercisable;  (ii) 292,161
     warrants to purchase  common  stock at $3.50 per share;  and (iii)  550,000
     warrants to purchase Common Stock at $1.75 per share.

(8)  Includes 266,667 Rule 701 Warrants and 150,000 BioAegean Options.


                                       73


<PAGE>

      Option Grant Table.  The following  table sets forth  certain  information
regarding  options granted during the fiscal year ended December 31, 1995 by the
Company to the individuals named in the above Summary Compensation Table:

                        OPTION GRANTS IN LAST FISCAL YEAR

                                       % of Total
                                       Options
                      Options          Granted to
                      Granted          Employees in  Exercise Price   Expiration
Name                  (#)              Fiscal Year   $/Share          Date
- ----                  ---              -----------   -------          ----

William A. Carter      300,000(2)        46%          $1.00             5/4/05
Robert E. Peterson      50,000(2)         8%          $1.00             5/4/05
Sharon Will            150,000(2)        23%          $1.00             5/4/05
Harris Freedman        150,000(2)        23%          $1.00             5/4/05

(1)  Amounts  represent  hypothetical  gains  that  could  be  achieved  for the
     respective options if not exercised until the end of the option term. These
     gains are based on assumed rates of stock price  appreciation of 5% and 10%
     (as required under the rules and regulations of the Securities and Exchange
     Commission)  compounded annually from the dates the respective options were
     granted to their respective expiration dates. This table does not take into
     account any appreciation in the price of the Common Stock to date.

(2)  In June 1995, the Board of Directors of BioAegean  Corp.  ("BioAegean"),  a
     subsidiary of the Company,  issued  options to purchase the common stock of
     BioAegean  at an exercise  price of $1.00 per share.  In  consideration  of
     these options,  the  recipients  agreed to serve  BioAegean's  needs for at
     least 24 months unless fully  incapacitated.  There is no public market for
     BioAegean shares.

                                       74


<PAGE>

             LONG-TERM INCENTIVE PLANS - AWARDS IN LAST FISCAL YEAR

                                                                 Performance or
                               Number of                         Other Period
                               Shares, Units                    Until Maturation
Name                           or Other Rights(#)(1)             or Payout
- ----                           ---------------------            ----------------

William A. Carter                 300,000                             5/4/05
 Chairman of the Board
 Chief Executive Officer

Robert E. Peterson                 50,000                             5/4/05
 Chief Financial Officer

Sharon Will                       150,000                             5/4/05
 Vice President

Harris Freedman                   150,000                             5/4/05

(1)  BioAegean Options to purchase common stock of BioAegean Corp., a subsidiary
     of the Company at $1.00 per share which were granted in May 1995.

Employment Agreements

     The Company entered into an employment agreement with Sharon Will providing
for her employment as Vice President for Corporate  Communications  and Investor
Relations  on  November  1, 1994.  The  agreement  provides  for Ms.  Will to be
employed  for a one-year  term for a base salary of $120,000  and  provides  for
termination of the agreement upon certain circumstances including termination by
the  Company or Ms.  Will on 14 days  written  notice or the sale of Ms.  Will's
stock in the Company.  Pursuant to the agreement,  Ms. Will was granted Rule 701
Warrants to purchase  200,000 shares of Common Stock of the Company at $3.50 per
share. Ms. Will's  agreement  provides that she shall devote 60% of her business
time,  attention and energies to the Company during regular  business  hours. In
the event that Ms. Will's  employment  is  terminated  for any reason other than
breach  of  contract,  she shall be  entitled  to  receive  accrued  and  unpaid
compensation  plus an additional three months'  compensation.  In July 1995, the
term of Ms.  Will's  employment  agreement  was extended  from one year to three
years.

     The Company  entered  into an  employment  agreement  with Harris  Freedman
providing  for  Mr.  Freedman's  employment  as  Vice  President  for  Strategic
Alliances  on August 1, 1994.  The  agreement  provides  for Mr.  Freedman to be
employed  for a one year term for a base salary of  $120,000  and  provides  for
termination of the agreement upon certain circumstances including termination by
the  Company  or Mr.  Freedman  on 14 days  written  notice  or the  sale of Mr.
Freedman's  stock in the Company.  Pursuant to the agreement,  Mr.  Freedman was
granted  Rule 701  Warrants to purchase  400,000  shares of Common  Stock of the
Company at $3.50 per share.  Mr.  Freedman's  agreement  provides  that he shall
devote 30% of his business  time,  attention and energies to the Company  during

                                       75


<PAGE>

regular  business  hours.  In  the  event  that  Mr.  Freedman's  employment  is
terminated for any reason other than breach of contract, he shall be entitled to
receive  accrued  and  unpaid  compensation  plus an  additional  three  months'
compensation.  In July 1995, the term of Mr. Freedman's employment agreement was
extended from one year to three years.

     The Company entered into an amended and restated employment  agreement with
Dr.  William  A.  Carter,  dated as of July 1, 1993 and as amended in July 1995,
which  provides for his  employment  until May 8, 2001 at an initial base annual
salary of $295,832, subject to annual cost of living increases. In addition, Dr.
Carter may receive an annual  performance bonus of up to 25% of his base salary,
in the  sole  discretion  of  the  Board  of  Directors.  Dr.  Carter  will  not
participate in any discussions concerning the determination of his annual bonus.
Dr. Carter is also entitled to an incentive  bonus of 0.5% of the gross proceeds
received  by  the  Company  from  any  joint  venture  or  corporate  partnering
arrangement, up to an aggregate maximum incentive bonus of $250,000 for all such
transactions.  It is  contemplated  that Dr.  Carter  will be  entitled  to this
incentive  bonus upon receipt of the gross  proceeds  from the SAB Agreement (as
defined in "Certain Transactions"). Dr. Carter's agreement also provides that he
shall  be paid  his  base  salary  and  benefits  through  May 8,  1996 if he is
terminated  without "cause," as that term is defined in the agreement.  Pursuant
to his original agreement,  as amended on August 8, 1991, Dr. Carter was granted
options to purchase  73,728 shares of the Company's  Common Stock at an exercise
price of $2.71 per share.

1992 Stock Option Plan

     The Company's  1992 Stock Option Plan (the "1992  Plan"),  provides for the
grant of options for the  purchase  of up to an  aggregate  of 92,160  shares of
Common Stock to the Company's employees, directors, consultants and others whose
efforts  are  important  to the  success  of  the  Company.  The  1992  Plan  is
administered by the Compensation Committee of the Board of Directors,  which has
complete  discretion  to select  the  eligible  individuals  to  receive  and to
establish the terms of option grants. The 1992 Plan provides for the issuance of
either non-qualified options or incentive stock options, provided that incentive
stock  options  must be  granted  with an  exercise  price of not less than fair
market value at the time of grant and that  non-qualified  stock options may not
be granted  with an exercise  price of less than 50% of the fair market value at
the time of grant.  The  number of shares of Common  Stock  available  for grant
under the 1992 Plan is subject to adjustment for changes in  capitalization.  To
date, no options have been granted under the 1992 Plan.

1990 Stock Option Plan

     The  Company's  1990  Stock  Option  Plan,  as amended  (the "1990  Plan"),
provides for the grant of options to employees, directors, officers, consultants
and  advisors of the Company for the  purchase of up to an  aggregate of 460,798
shares of Common Stock. The plan is administered by the  Compensation  Committee
of the Board of  Directors,  which has complete  discretion  to select  eligible
individuals to receive and to establish the terms of option  grants.  The number
of shares of Common Stock  available for grant under the 1990 Plan is subject to
adjustment for changes in  capitalization.  As of December 31, 1995,  options to
acquire an  aggregate  of 228,502  shares of the Common  Stock were  outstanding
under the 1990 Plan.

                                       76


<PAGE>

401(K) Plan

     In December  1995,  the Company  established a defined  contribution  plan,
effective  January 1, 1995, the Hemispherx  Biopharma  employees 401(K) Plan and
Trust Agreement (the "401(K) Plan").  All full time employees of the company are
eligible to  participate  in the 401(K) Plan  following one year of  employment.
Subject to certain  limitations  imposed by federal tax laws,  participants  are
eligible to  contribute  up to 15% of their  salary  (including  bonuses  and/or
commissions  per annum.  Participants'  contributions  to the 401(K) Plan may be
matched by the Company at a rate determined  annually by the Board of Directors.
Each participant  immediately vests in his or her deferred salary contributions,
while  Company  contributions  will  vest  over one  year.  In 1995 the  Company
provided  matching  contributions to each employee for up to 6% of annual pay or
$25,500.  The  Company  also  absorbed  the cost of  employee  contributions  of
$25,000.

Compensation Committee Interlocks and Insider Participation

     During  the  fiscal  year  ended  December  31,  1995,  the  members of the
Company's  Compensation  Committee were William A. Carter,  Peter W. Rodino III,
and E.  Gerald  Kay.  Dr.  Carter is an officer of the  Company.  The  Company's
Compensation  Committee  currently  consists of Peter W. Rodino III,  Richard C.
Piani  and  E.  Gerald  Kay.  The  following   transactions   describe   certain
relationships  between  the  Company  and  present  and  former  members  of the
Compensation Committee:

     In May 1995, Dr. Carter,  E. Gerald Kay and certain other  individuals  and
entities  entered  into a 1995  Standby  Financing  Agreement  with the  Company
pursuant  to which they were  collectively  obligated  to invest  during 1995 an
aggregate  of  $5,500,000  in the Company in the event the Company was unable to
secure alternative financing and the Board of Directors determined that the sale
of  securities  to such  persons  was  advisable  (the "1995  Standby  Financing
Agreement"). In exchange for entering into the 1995 Standby Financing Agreement,
the Company issued to each of the parties  ten-year  warrants to purchase 50,000
shares of the Company's Common Stock at an exercise price of $1.75 per share for
each $100,000 of standby financing obligation assumed by the party, resulting in
warrants  to purchase an  aggregate  of  2,750,000  shares of Common  Stock.  In
September 1995, the parties to the 1995 Standby Financing  Agreement,  including
Dr. Carter and Mr. Kay, agreed to extend their obligations  through December 31,
1996.

     In June 1995,  the  directors  of  BioAegean  Corp.,  a  subsidiary  of the
Company,  issued 10-year options to purchase an aggregate of 1,200,000 shares of
common  stock  of  BioAegean  at an  exercise  price  of $1.00  per  share  (the
"BioAegean  Options") to its officers and directors.  The BioAegean  Options are
conditional  upon the recipient's  agreement to serve BioAegean as needed for at
least 24 months unless fully  incapacitated.  William A. Carter, M.D., serves as
Chairman,  Chief  Executive  Officer and a Director of  BioAegean  and  received
300,000  BioAegean  Options.  Peter  W.  Rodino  III  serves  as  Vice-Chairman,
Secretary,  Corporate  Counsel and a director of BioAegean and received  150,000
BioAegean  Options.  R.  Douglas  Hulse  serves as Chief  Operating  Officer  of
BioAegean and received 50,000  BioAegean  Options.  Richard C. Piani serves as a

                                       77


<PAGE>

director and the Advisor for European  Affairs of BioAegean and received  50,000
BioAegean Options. E. Gerald Kay serves as a director for BioAegean and received
50,000 BioAegean Options.

     In March 1995, the Company received an  interest-free  loan from William A.
Carter in the amount of $35,000. In March 1995, the Company repaid the loan from
Dr. Carter.

     In February  1995,  the Company  issued  notes in the  aggregate  principal
amount of $600,000 in connection with the Tisch/Tsai  Restructuring  (as defined
below).  The notes were secured by a pledge by Dr.  Carter of 112,925  shares of
Series C Preferred Stock and 240,756 shares of Common Stock. The notes have been
paid off and the shares are being returned.

Limitation of Liability and Indemnification Matters

     As permitted by the Delaware General Corporation Law ("DGCL"),  the Company
has adopted provisions in its Amended and Restated  Certificate of Incorporation
which  eliminate the personal  liability of its directors to the Company and its
stockholders for monetary damages for breach of the directors'  fiduciary duties
in  certain  circumstances  and which  require  the  Company  to  indemnify  its
directors,  officers and other agents, by Bylaw, agreement, vote of directors or
stockholders or otherwise, to the fullest extent permitted by law.

     The Company has entered into separate  indemnification  agreements with its
directors and its officers.  These agreements  require,  among other things, the
Company to indemnify directors and officers against certain liabilities that may
arise by reason of their  status or service as  directors  and  officers  and to
advance their expenses incurred as a result of any proceeding against them as to
which they could be indemnified.  The Company  believes that these provisions in
its Amended and Restated  Certificate of Incorporation  and the  indemnification
agreements  are necessary to attract and retain  qualified  persons as directors
and officers. See "Business--Legal Proceedings".

                                       78


<PAGE>

                    Security Ownership of Certain Beneficial
                              Owners and Management

     The  following  table  sets  forth,  as of May 15,  1996,  the  record  and
beneficial  ownership  of  Common  Stock  of the  Company  by each  officer  and
director,  all officers and  directors as a group,  and each person known to the
Company to own beneficially or of record five percent or more of the outstanding
shares of the Company:

                                   Shares
Officers, Directors and            Beneficially           Percent of Shares
Principal Stockholders             Owned                  Beneficially Owned (1)
- ----------------------             ------------           ----------------------

William A. Carter                  4,156,671(2)                  21.1%
Harris Freedman                    1,025,494(3)                   6.2%
E. Gerald Kay                        656,667(4)                   4.0%
Sharon D. Will                       556,667(5)                   3.4%
Cedric C. Philipp                     27,667(6)                   *
Peter W. Rodino III                   25,099(7)                   *
Robert E. Peterson                    10,368(8)                   *
Jerome Belson                        945,000(9)                   5.7%
 Belson Enterprises, Inc.
 495 Broadway
 New York, NY 10012
Josephine Dolhancryk                     820(10)                  *
Richard C. Piani                      18,023(11)                  *
David R Strayer                       14,745                      *
R. Douglas Hulse                      60,000(12)                  *
All directors,                     6,552,221                     29.6%
executive officers
as a group (11 persons)

   *Less than 1%

(1)  For purposes of this table,  a person or group of persons is deemed to have
     "beneficial  ownership" of any shares of Common Stock which such person has
     the  right to  acquire  such  shares  within 60 days of May 15,  1996.  For
     purposes of computing the percentage of outstanding  shares of Common Stock
     held by each person or group of persons  named above,  any  security  which
     such person or persons has or have the right to acquire within such date is
     deemed  to be  outstanding  but is not  deemed  to be  outstanding  for the
     purpose of computing the percentage  ownership of any other person.  Except
     as  indicated in the  footnotes  to this table and  pursuant to  applicable
     community property laws, the Company believes based on information supplied
     by such persons,  that the persons named in this table have sole voting and
     investment  power with  respect to all  shares of Common  Stock  which they
     beneficially own.

(2)  Includes  irrevocable  proxies to vote 2,050,000  shares of Common Stock on
     all matters  that come before the  stockholders  of the Company  until such
     time as (i) the  Company  shall have  achieved a market  capitalization  of

                                       79


<PAGE>

     $300,000,000 or greater for at least 20 consecutive  days of trading in the
     public  markets or (ii) the Company  shall have  received a bona fide offer
     for acquisition or merger,  the net effect of which, if consummated,  would
     be to  establish  a market  capitalization  of the Company of not less than
     $300,000,000.  This proxy shall be terminated  upon the sale of such shares
     in an arm's  length  public sale.  Also  includes (i) an option to purchase
     73,728  shares of Common  Stock from the  Company at an  exercise  price of
     $2.71 per,  (ii)  warrants  to  purchase  960 shares of Common  Stock at an
     exercise  price of $3.50 per share,  (iii) Rule 701  Warrants  to  purchase
     466,667  shares  of Common  Stock at a price of $3.50  per share  (does not
     include 933,333 which are  non-exercisable);  and (iv) warrants to purchase
     500,000 shares of Common Stock at $1.75 per share issued in connection with
     the 1995 Standby Financing Agreement. Dr. Carter has pledged 112,925 shares
     of Series C Preferred and 240,756  shares of Common Stock to the Tisch/Tsai
     Entities as security for the  repayment of the  $660,000  note  executed in
     March 1995. The note has been paid off and the shares are being returned.

(3)  Includes (i) 50,000 shares of Common Stock held by Bridge Ventures, Inc. of
     which Mr.  Freedman is an officer;  (ii) 50,000 shares of Common Stock held
     by SMACS Holding Corp. of which Mr. Freedman is an officer,  (iii) warrants
     to purchase  292,161  shares of Common Stock at an exercise  price of $3.50
     per share  owned of  record by Bridge  Ventures,  Inc.;  (iv)  warrants  to
     purchase  390,000 shares of Common Stock which are exercisable at $1.75 per
     share issued in connection with the 1995 Standby Financing  Agreement owned
     of record by Bridge  Ventures,  Inc.;  and (v) 133,333 Rule 701 Warrants to
     purchase  Common  Stock of the Company at an exercise  price of $3.50 (does
     not include 266,667 which are non-exercisable);  and (iv) 60,000 Units each
     consisting of one Common Stock and one warrant to purchase  Common Stock at
     $3.50.  Bridge  Ventures,  Inc. has given an irrevocable  proxy to vote its
     150,000  shares  to  William  A.  Carter  on the same  terms  as the  proxy
     described in Note 2.

(4)  Includes  Rule 701 Warrants to purchase  6,667 shares of Common Stock at an
     exercise  price of $3.50  per  share  (does not  include  13,333  which are
     non-exercisable)  and  550,000  warrants to  purchase  Common  Stock of the
     Company at an exercises  price of $1.75 per share issued in connection with
     the 1995  Standby  Financing  Agreement.  Mr. Kay has given an  irrevocable
     proxy to vote  100,000  shares of Common  Stock to William A. Carter on the
     same terms as the proxy described in Note 2.

(5)  Includes Rule 701 Warrants to purchase  66,667 shares of Common Stock at an
     exercise  price of $3.50 per  share  (does not  include  133,333  which are
     non-exercisable).  Also  includes  100,000  shares of Common Stock owned of
     record by  Worldwide  Marketing,  a company  for which Ms.  Will  serves as
     President. Worldwide Marketing has given an irrevocable proxy to vote these
     shares to William A.  Carter on the same  terms as the proxy  described  in
     Note 2. Also  includes  390,000  warrants to purchase  Common  Stock of the
     Company at an exercise price of $1.75.


                                       80


<PAGE>

(6)  Includes  Rule 701  Warrants to purchase  6,667  shares of Common  Stock at
     $3.50  per share  (does  not  include  13,333  which are  non-exercisable),
     options to purchase  20,000  shares of Common  Stock at $3.50 per share and
     1,000 Units owned by the Cedric C. Philipp and Sue Jones  Philipp  Trust of
     which Mr. Philipp and his wife are Trustees.

(7)  Includes  Rule 701  Warrants to purchase  6,667  shares of Common  Stock at
     $3.50 per share (does not include 13,333 which are non-exercisable).

(8)  Consists of options to purchase  Common Stock at an exercise price of $4.34
     per share.  Does not include 50,000 Warrants to purchase Common Stock at an
     exercise price of $3.50 per share effective March 1, 1997.

(9)  Includes 100,000  Bridgeholder  Options to purchase 100,000 Bridge Units at
     $.50 per unit  consisting  of 100,000  shares of Common  Stock and  100,000
     Class A Redeemable  Warrants  exercisable at $4.00 per share. Also includes
     warrants  to  purchase  550,000  shares of Common  Stock at $1.75 per share
     owned of record by Belson Enterprises, Inc., a company for which Mr. Belson
     serves as President,  issued in connection with the 1995 Standby  Financing
     Agreement  and 47,500 Units,  each  consisting of one share of Common Stock
     and one warrant.

(10) Consists of options to purchase  820 shares of Common  Stock at an exercise
     price of $3.80.  Does not include 50,000  Warrants to purchase Common Stock
     at an exercise price of $3.50 per share effective March 1, 1997.

(11) Includes  options to purchase  4,608  shares of Common Stock at an exercise
     price of $4.34 and 4,608  shares  of  Common  Stock  owned of record by Mr.
     Piani's wife.

(12) Includes 60,000 options to purchase Common Stock at $3.50 per share held by
     The Sage  Group,  of which Mr.  Hulse is an  Executive  Director.  Does not
     include  100,000  options to purchase  Common  Stock at $1.75 per share and
     330,000 options to purchase Common Stock at $3.50 per share.

                                       81


<PAGE>

                                   RESALES BY

     This   Prospectus   relates  to  the   proposed   resale  by  the   Selling
Securityholders  of up to 2,770 shares of  outstanding  Common Stock,  2,427,275
shares of Common Stock  issuable  upon  conversion  of the  Preferred  Stock and
890,543  issuable upon exercise of the Warrants.  The following table sets forth
as of July 10, 1996 certain information with respect to the persons for whom the
Company is  registering  the Shares for sale to the public  except as  footnoted
below. None of such persons has had a material relationship with or has held any
position or office with the Company or any of its affiliates within three years,
other than as footnoted below (see "Certain Transactions"). The Company will not
receive any of the proceeds from the sale of the Common  Stock.  If the Warrants
are exercised, the Company would receive $4,064,900.

Names of Selling              Common Stock Beneficially     Common Stock Offered
Security Holders              Owned Prior to July, 1996     By Beneficial Owner
- ----------------              -------------------------     -------------------

Seymour Cohn(1)                        119,807                   119,807
Myron Cherry(2)                         12,770                    12,770
Charles Moore(3)                        43,304                    43,304
Maurice Schlang(4)                     138,432                   138,432
The Olmstead Group, LLC(5)             240,000                   240,000
Fred Craves(5)                         120,000                   120,000
Francis F. Bodkin, Jr.(5)              120,000                   120,000
GFL Advantage Fund Ltd.(6)           2,527,275                 2,527,275

(1) Represents  shares of Common Stock underlying a Warrant  exercisable  during
the four year period commencing November 2, 1995, at an exercise price of $10.85
per share.

(2)  Represents  (i) 10,000  shares of Common Stock  underlying  two Warrants of
which 5,000 shares are exercisable at any time  commencing  November 1, 1994 and
expiring  December 31, 1998,  at an exercise  price of $3.50 per share and 5,000
shares  exercisable at any time commencing March 20, 1995 and expiring March 31,
1999,  at an exercise  price of $3.50 per share;  and (ii) 2,770 share of Common
Stock.

(3)  Represents  (i)  40,000  shares of Common  Stock  underlying  two  Warrants
exercisable  during the five year  period  commencing  November  2, 1995,  at an
exercise  price of $2.00 per  share;  and (ii)  2,304  shares  of  Common  Stock
underlying  a stock  option  exercisable  during the ten year period  commencing
April 16, 1996, at an exercise price of $4.34 per share.

(4)  Represents  (i)  120,000  shares  of  Common  Stock  underlying  a  Warrant
exercisable  during the five year  period  commencing  November  2, 1995,  at an
exercise  price of $2.00 per  share;  and (ii)  18,432  shares  of Common  Stock
underlying  a stock  option  exercisable  during the ten year period  commencing
January 25, 1995, at an exercise price of $4.34 per share.

(5) Represents Common Stock underlying Warrants exercisable during the five year
period commencing July 3, 1996 at an exercise price of $4.00 per share.

(6)  Represents  (i) 2,427,275  shares of Common Stock  underlying the Preferred
Stock; and (ii) 100,000 shares of Common Stock underlying a Warrant  exercisable

                                       82


<PAGE>

during the period  commencing  July 3, 1996 and expiring  November 2, 2000 at an
exercise  price  of  $4.00  per  share.  The  Preferred  Stock   Certificate  of
Designations  and the Warrant  provides that GFL Advantage  Fund Limited may not
convert its  Preferred  Stock or  exercise  its Warrant at any time to acquire a
number of shares of Common Stock in excess of 4.9% of the Company's  outstanding
Common Stock.




                                       83


<PAGE>

                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     In July 1996, the Company  consummated a private  offering of its Preferred
Stock  pursuant to Rule 506 of Regulation as  promulgated  by the Securities and
Exchange  Commission  under the Securities Act of 1933, as amended.  The Company
issued 6,000 shares of Preferred  Stock,  $.01 par value at a purchase  price of
$1,000 per share.

     In May 1996, the Company  entered into two additional  agreements  with The
Sage Group.  Under the first  agreement,  R.  Douglas  Hulse will serve as Chief
Operating Officer of the Company. In exchange,  The Sage Group will receive from
the Company;  (i) a monthly retainer of $10,000 starting June 1, 1996, replacing
the  $5,000  monthly  retainer  provided  in the June 1995  agreement;  and (ii)
options to purchase  250,000 shares of the Company's Common Stock at an exercise
price of $3.50 per share.  Under the second agreement,  The Sage Group agreed to
introduce  the Company to and assist the Company in  negotiations  with  certain
foreign distribution partners. In exchange, The Sage Group will receive from the
Company;  (i) a bonus  payment of  $500,000 if total sales of Ampligen in Canada
and Europe  exceed $10 million for 1996 and 1997  combined;  and (ii) options to
purchase 140,000 shares of the Company's Common Stock at an exercise price $3.50
per share.  R. Douglas  Hulse,  Chief  Operating  Officer of the Company,  is an
Executive Director of the Sage Group.

     In March 1996,  William A. Carter assigned and transferred  50,000 Warrants
to purchase  Common Stock, at $1.75 per share, to three outside parties that had
loaned the Company money in 1995. These loans were repaid in 1995.

     In March 1996, Harris Freedman assigned and transferred 160,000 Warrants to
purchase  Common  Stock at $1.75 per share to Sharon  Will,  an  officer  of the
Company and two other shareholders.

     In March  1996,  the  Compensation  Committee  of the  Board  of  Directors
approved a grant of 250,000  warrants  to purchase  common  stock at an exercise
price  of  $3.50  per  share to  Michael  C.  Burrows.  This  grant  was made in
accordance with a Letter  Agreement dated January 15, 1996, in which Mr. Burrows
agreed to provide consulting services to the Company for twenty four months. Mr.
Burrows served as Director of the Company in past years.

     In March 1996 the Compensation Committee of the Board of Directors approved
grants of 50,000 warrants to purchase common stock at an exercise price of $3.50
per share to each of Robert E. Peterson, CFO and Josephine Dolhancryk, Assistant
Secretary of the Company.  Such warrants are not exercisable for a period of one
year from issuance.

     In March 1995, the Company instituted a declaratory judgment action against
a February  noteholder,  Seymour  Cohn, of a $5,000,000  convertible  note and a
secured  defendant in United States  District Court for the Eastern  District of
Pennsylvania  to declare  as void,  set aside,  and  cancel  the  February  1992
convertible note between the Company and Mr. Cohn (the "Note"). In addition, Mr.
Cohn  instituted  suit against  the Company  on the Note in the Circuit Court of

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the 15th  Judicial  District  in and for Palm  Beach  County,  Florida,  seeking
judgment on the Note,  plus attorney fees,  costs and expenses;  in August 1995,
this  action  was  stayed  by the  Florida  Court  pending  the  outcome  of the
Pennsylvania  action. Mr. Cohn also filed a motion for a preliminary  injunction
in the Pennsylvania  court to enjoin the Company from disbursing the proceeds of
a public  offering  in the amount of $5.8  million,  which  motion  was  granted
November, 1995. On February 15, 1996, the Company reached an agreement to settle
this  matter.  Terms  and  conditions  of  the  settlement  include  payment  of
$6,450,000 to Mr. Cohn to cover the unpaid balance Note balance,  legal expenses
and the retention of certain  warrants  granted prior to the lawsuit.  The funds
under this settlement were paid on March 21, 1996. Mutual releases were executed
which completed the settlement of the litigation.

     In January 1996, the Company  engaged the Research  Works,  Inc. to produce
four  research  reports with respect to the  securities of the Company over a 13
month period. In exchange for this service,  the Company granted 60,000 warrants
to the Research Works, Inc. exercisable at $4.00 per share.

     In January 1996, the Company entered into a one year  consulting  agreement
with   Millenium   International   Communications,   Ltd.   ("Millenium").   The
consideration for such services is $120,000, to be paid by the Company in either
monthly payments or balloon  payments,  in the Company's  discretion.  Millenium
shall  consult  with and render  advice to the Company  specifically  concerning
strategic planning, public relations and other related matters. The President of
Millenium,  David C. Drescher is related to Steve Drescher, a former director of
the Company.

     In  December  1995,  the  Company  retained  the law firm of  Akin,  Gump,,
Strauss,  Hauer & Feld, LLP (the "Akin Group") to provide general legal counsel,
advice and representation.  Initially, the Akin Group will represent the Company
in matters pertaining to the Food and Drug Administration ("FDA"). The agreement
includes  incentive  payments  for  obtaining  FDA  approval of Ampligen for HIV
Disease treatment.

     In November 1995, the Company sold 5,313,000 Units of securities through an
initial public offering. Each Unit consists of one share of Common Stock and one
Class A Redeemable Warrant.

     In August 1995, in connection with the settlement of a lawsuit brought by a
former  employee of the Company  against the Company and David  Fries,  a former
director of the Company,  the Company,  Dr. Fries,  the Canaan  Entities and Dr.
William A. Carter,  President,  Chairman and CEO of the Company, entered into an
agreement  pursuant to which the Company has agreed to  reimburse  Dr. Fries for
expenses in the amount of $50,000  incurred in connection with such  litigation.
As part of such  agreement,  the  parties  agreed to mutual  releases of certain
claims for  expenses  and damages  arising out of the  litigation  or arising in
connection with Dr. Fries' service as a director of the Company.  The payment of
$50,000 to Dr. Fries is evidenced by an  interest-free  promissory note pursuant
to which the final payment is due on or before  November 15, 1995.  The note was
assigned to the Canaan Entities.

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<PAGE>

     In June 1995,  the Company  entered into an  agreement  with The Sage Group
pursuant  to which The Sage Group has  agreed to  introduce  the  Company to and
assist  the  Company  in  negotiations  with  certain  prospective  distribution
partners listed in the agreement.  In exchange, The Sage Group will receive from
the Company:  (i) a monthly retainer of $5,000 which began accruing July 1, 1995
and (ii) at The Sage Group's  option,  a percentage  of the  proceeds,  up to an
aggregate of $150,000,  from the Company's first  distribution  agreement with a
partner listed in the agreement or the sum of $125,000 from such  agreement.  In
connection  with this  agreement,  the Company will also issue to The Sage Group
options to purchase  100,000 shares of the Company's Common Stock at an exercise
price of $1.75 per share.  R.  Douglas  Hulse,  Chief  Operating  Officer of the
Company, is an Executive Director of The Sage Group.

     In May 1995, William A. Carter,  M.D.,  President,  Chairman and CEO of the
Company,  Bridge  Ventures,  Sharon  Will,  a Vice  President  of  the  Company,
Associated  Funding  Services,  Inc.,  Jerome  Belson,  a director of one of the
Company's subsidiaries and a principal shareholder and E. Gerald Kay, a director
of the Company, entered into a 1995 Standby Financing Agreement with the Company
pursuant  to which they are  collectively  obligated  to invest  during  1995 an
aggregate  of  $5,500,000  in the  Company in the event the Company is unable to
secure alternative financing and the Board of Directors determines that the sale
of securities  to such persons is  advisable.  In exchange for entering into the
1995  Standby  Financing  Agreement,  the Company  issued to each of the parties
ten-year  warrants to purchase 50,000 shares of the Company's Common Stock at an
exercise  price of $1.75  per  share  for each  $100,000  of  standby  financing
obligation assumed by the party,  resulting in warrants to purchase an aggregate
of 2,750,000  shares of Common Stock.  In September  1995, the parties agreed to
extend their  obligations  under the 1995 Standby  Financing  Agreement  through
December 31, 1996.  Harris  Freedman,  a Vice President of the Company,  and his
wife are officers of Bridge Ventures.  Gerald Brauser is President of Associated
Funding Services, Inc.

     In June 1995, the Board of Directors of BioAegean Corp, a subsidiary of the
Company, issued an aggregate of 1,200,000 BioAegean Options at an exercise price
of $1.00 per share to its officers and directors, including certain officers and
directors  of the Company.  In  consideration  for the  BioAegean  Options,  the
recipients agreed to serve BioAegean's needs for at least 24 months unless fully
incapacitated.  William A. Carter, M.D., Chairman, President and Chief Executive
Officer of the  Company,  serves as  Chairman,  Chief  Executive  Officer  and a
Director of BioAegean and received 300,000  BioAegean  Options.  Peter W. Rodino
III,  a  director  and  Secretary  of  the  Company,  serves  as  Vice-Chairman,
Secretary,  Corporate  Counsel and a director of BioAegean and received  150,000
BioAegean  Options.  R. Douglas Hulse serves as Chief  Operating  Officer of the
Company and BioAegean and received  50,000  BioAegean  Options.  Robert Peterson
serves as Chief Financial Officer of both the Company and BioAegean and received
50,000 BioAegean Options.  Sharon Will, Vice President of Investor Relations and
Corporate  Communications for the Company, serves as Vice President of Marketing
for BioAegean and received 150,000 BioAegean Options.  Harris Freedman serves as
Vice  President for  Strategic  Alliances for both the Company and BioAegean and
received 150,000 BioAegean Options. Richard C. Piani, a director of the Company,
serves as a director  and the  Advisor for  European  Affairs of  BioAegean  and

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<PAGE>

received 50,000 BioAegean  Options.  E. Gerald Kay serves as a director for both
the Company and BioAegean and received  50,000  BioAegean  Options.  BioAegean's
remaining  director,  Jerome  Belson,  a principal  stockholder  of the Company,
received 50,000 BioAegean Options.

     In March 1995, the Company  issued the Original  Brauser Note, to Gerald A.
Brauser in the  principal  amount of $200,000.  The  Original  Brauser Note also
provided for the issuance of warrants to purchase 50,000 shares of the Company's
Common  Stock at $1.75 per share.  In May 1995,  the  Company  restructured  the
Original  Brauser  Note and issued the New  Brauser  Note to Mr.  Brauser in the
amount  of  $100,000  along  with  warrants  to  purchase  25,000  shares of the
Company's  Common Stock at $1.75 per share.  As part of the  restructuring,  Mr.
Brauser  agreed to (i) purchase  100,000  shares of Common Stock with $50,000 of
the Original  Brauser Note and (ii) apply  $50,000 of the Original  Brauser Note
towards a Bridge Loan in connection with the Bridge  Financing.  The New Brauser
Note of $100,000 and the $50,000  Bridge Loan have been paid off. In  connection
with both the Original  Brauser Note and the New Brauser Note,  Bridge  Ventures
agreed to permit the Company to  collateralize  these  notes with the  Company's
patent estate,  which collateral had previously been granted to Bridge Ventures.
Bridge  Ventures  further  guaranteed  the  Original  Brauser  Note with certain
publicly  traded common stock,  which  guarantee was released by Mr.  Brauser in
connection  with the  restructuring.  Harris  Freedman,  a Vice President of the
Company, and his wife are both officers of Bridge Ventures.

     In March and April  1995,  in  connection  with the Bridge  Financing,  the
Company issued Bridge Notes to certain lenders in the aggregate principal amount
of  $1,500,000,  including  a Bridge  Note in the amount of  $250,000 to Stephen
Drescher  and a  Bridge  Note  in the  amount  of  $150,000  to  Jerome  Belson.
Additionally,  in  connection  with the Bridge  Loans,  the  Company  has issued
options to purchase 166,665 Bridge Units at $.50 per Bridge Unit to Mr. Drescher
and options to purchase  100,000  Bridge Units at $.50 per Bridge Unit to Jerome
Belson.  In July 1995, Mr.  Drescher  assigned the $250,000  Bridge Note and his
options to  purchase  166,665  Bridge  Units to  certain  other  investors.  Mr.
Drescher  is a former  director  of the  Company  and  presently  serves  as the
Director of Corporate Finance at Monroe Parker, one of the Underwriters.  Jerome
Belson is a principal shareholder and director of BioAegean, a subsidiary of the
Company.

     In March 1995,  the Company  received  interest-free  loans from William A.
Carter and Harris Freedman in the amounts of $35,000 and $12,000,  respectively.
In March 1995, the Company  repaid the loan from Dr. Carter.  In April 1995, the
Company repaid the loan from Mr. Freedman.

     In December 1992 and February  1993,  the Company  issued to the Tisch/Tsai
Entities,  in a private placement,  promissory notes in the aggregate  principal
amount  of  $2,400,000  due on April 30,  1994,  and  warrants  to  purchase  an
aggregate of 36,864  shares of the  Company's  Common Stock or 40,000  shares of
Series C Preferred  Stock at an  exercise  price of the (i) $13.02 or $12.00 per
share,  respectively  or (ii) the per share price of Common Stock in the initial
public  offering.  The warrants  expire on December  31,  1997.  One-half of the

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principal amount of the notes and one-half of the warrants were purchased by FLF
Associates.  James S. Tisch, a former director of the Company, is a principal of
FLF  Associates.  The  remaining  half of the  principal  amount of the note and
one-half of the warrants  were  purchased by Gerald Tsai,  Jr. and Lincoln Trust
Company,  Custodian  FBO Gerald Tsai,  Jr. Mr. Tsai is a former  director of the
Company. Interest on the notes is payable quarterly at an annual rate of 12% (6%
prior to May 1, 1993).

     In February 1995, the Company entered into a settlement  agreement with the
Tisch/Tsai   Entities  to  restructure  the  December  1992  and  February  1993
promissory  notes in the aggregate  principal  amount of  $2,400,000  and settle
certain  threatened  claims made by the Tisch/Tsai  Entities against the Company
(the "Tisch/Tsai  Restructuring").  This debt restructuring consisted of (i) the
repayment  by the  Company of  $1,200,000  in  principal,  (ii) the  issuance of
replacement  notes  in  the  aggregate  principal  amount  of  $600,000  to  the
Tisch/Tsai  Entities  which  notes are due on the  earlier  of the  closing of a
public  offering or May 28, 1996 and bear  interest at the rate of 8% per annum,
which  interest is payable in quarterly  installments  from an interest  reserve
established  by the Company,  (iii) the conversion of $600,000 of principal into
172,414 shares of Series C Preferred Stock at the rate of $3.48 per share,  (iv)
the amendment and restatement of certain  warrants issued in connection with the
original  notes in order to  increase  the  number of  shares of stock  issuable
thereunder  by 64,000  shares to provide  for  warrants  to  purchase a total of
144,000  shares of Common Stock at an exercise  price of $2.00 per share,  which
warrants are  exercisable  until  December 31, 1997,  and (v) the release by all
parties of any claims.  The  replacement  notes were  secured by a pledge by Dr.
William A.  Carter,  President,  Chief  Executive  Officer  and  Chairman of the
Company,  of 112,925  shares of Series C Preferred  Stock and 240,756  shares of
Common Stock.  In March,  1996 the notes were repaid and the shares of stock are
being returned.

     In November 1994,  the Company  restructured a $100,000 note issued in June
1993 to Myron Cherry (the "Cherry Note"),  a stockholder,  pursuant to which the
repayment  date of the  principal  amount of the Cherry Note was extended to the
closing date of the Company's initial public offering and the accrued but unpaid
interest subsequent to September 30, 1993 was converted into Common Stock of the
Company at a price of $5.43 per share.  Pursuant  to the  restructuring,  in the
event that the Company's  initial public  offering was not completed by February
28, 1995, the principal amount would be repaid by the Company or Bridge Ventures
Inc. by March 6, 1995.  In  addition,  the Company  issued to Mr.  Cherry  5,000
immediately  exercisable  warrants with an exercise price of $3.50 per share and
Bridge  Ventures  agreed that the unpaid  principal  on the Cherry Note would be
collateralized  by  the  Company's  patents  on the  same  terms  as the  Bridge
Financing arranged by Bridge Ventures. In March 1995, the Company and Mr. Cherry
agreed to extend the maturity of the promissory note from March 1, 1995 to March
31, 1995. During this extended period, the Company agreed to pay 8% interest and
grant Mr. Cherry a warrant to purchase 5,000 shares of Common Stock  exercisable
at $3.50.  The Company  further  agreed to either  register all of Mr.  Cherry's
2,770  shares of Common  Stock and 10,000  warrants to purchase  Common Stock in
connection  with this  Public  Offering  or  reduce  the  exercise  price of Mr.
Cherry's  warrants to $1.75 per share.  Because  Mr.  Cherry has not advised the

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<PAGE>

Company of his  election,  the Company has  reduced  the  exercise  price of his
warrants to $1.75 per share. As of July, 1995, the Company has repaid the entire
principal amount of the Note,  including  accrued interest.  Harris Freedman,  a
Vice President of the Company, and his wife are officers of Bridge Ventures.

     In October and  November  1994,  the Company  granted  Rule 701 Warrants to
purchase  20,000  shares of Common  Stock at $3.50 per share to E.  Gerald  Kay,
Cedric C.  Philipp and Peter  Rodino III,  directors  of the Company and Maryann
Charlap  Azzato,  a former  director of the Company.  In  addition,  the Company
granted the  following  Rule 701 Warrants to purchase  shares of Common Stock at
$3.50 per share:  1,400,000  warrants to William A. Carter;  200,000 warrants to
Sharon Will, Vice President of Investor Relations and Corporate  Communications;
and 400,000 warrants to Harris Freedman, Vice President for Strategic Alliances.

     From July 1994 to November 1994, the Company  completed a private placement
in which  it sold  2,050,000  shares  of  Common  Stock  to  certain  accredited
investors for an aggregate  consideration  of $1,025,000 (the "1994 Common Stock
Financing").   In  connection  with  the  private  placement,   Bridge  Ventures
introduced a number of investors  and lenders to the Company.  Harris  Freedman,
Vice President of the Company, and his wife are officers of Bridge Ventures.  In
conjunction  with the  1994  Common  Stock  Financing,  the  Company  agreed  to
collateralize  certain of its patents until the earlier of the  effectiveness of
the initial  public  offering or the  consummation  of  corporate  alliances  or
licensing  arrangement which provide  sufficient  operating capital and clinical
development  support to the  Company.  Pursuant  to the  agreement  with  Bridge
Ventures in connection with the 1994 Common Stock  Financing,  Messrs.  Philipp,
Rodino and Kay were elected to the Board of  Directors.  Purchasers of 1,950,000
of the shares of Common Stock issued pursuant to the 1994 Common Stock Financing
executed  irrevocable proxies naming William A. Carter, the Company's President,
Chief Executive  Officer and Chairman,  as proxy,  with full power to vote their
shares on all matters to be voted on by the  stockholders  of the Company  until
the  achievement by the Company of a market  capitalization  of  $300,000,000 or
greater under certain circumstances or the receipt by the Company of a bona fide
offer for acquisition or merger, the net effect of which, if consummated,  would
be to establish a market capitalization of at least $300,000,000.

     In October 1994, in connection  with the 1994 Common Stock  Financing,  the
Company  sold  50,000  shares  of  Common  Stock at a price of $.50 per share to
Stephen J. Drescher,  a former director of the Company,  80,000 shares of Common
Stock to the Belfort Family Trust, of which Mr. Drescher serves as Trustee, at a
price of $.50 per share and 50,000 shares of Common Stock at a price of $.50 per
share to Jerome  Belson,  a director of  BioAegean.  Mr.  Drescher also received
300,000 warrants in connection with general consulting services. In addition, in
October 1994,  the Company  received a certain loan in the  aggregate  principal
amount of $150,000 from the Belfort  Family Trust.  In March 1995,  the loan was
repaid  without  interest from the proceeds  from the Bridge  Loans.  In October
1995,  the  Belfort  Family  Trust sold 80,000  shares of Common  Stock to Carol
Schiller at a price of $2.00 per share.

     In October  1994,  the Company  entered  into an agreement  with  Bioclones
Proprietary  Limited  ("Bioclones"),   a  biopharmaceutical   company  which  is

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associated with The South African Breweries Limited ("SAB").  In connection with
the  execution  of SAB  Agreement,  the Company  granted  Cedric C.  Philipp,  a
Director of the Company,  an option to purchase 20,000 shares of Common Stock at
$3.50 per share. In addition, in October 1994, the Board of Directors granted to
Mr.  Philipp,  a director of the  Company  and Special  Advisor to the Board for
International  Marketing,  the right to receive 3% of the gross  proceeds of any
licensing fees and prepaid royalties received by the Company pursuant to the SAB
Agreement  and a fee of .75% of gross  proceeds in the event that  SAB/Bioclones
makes a tender  offer  for all or  substantially  all of the  Company's  assets,
including a merger, acquisition or related transaction. In addition, the Company
further agreed to provide a monthly retainer of $2,000 to Mr. Philip in exchange
for  consulting  services and  remuneration  for corporate  alliances  which are
principally introduced by Mr. Philipp. Mr. Philipp has been paid $90,000 to date
in connection with these arrangements.

     In September  1994,  Maryann  Charlap  Azzato,  formerly Vice  President of
Investor Relations and Corporate Communications and the former Vice Chairman and
director  of the  Company,  entered  into  an  agreement  with  Lloyd  DeVos,  a
stockholder,  former  director and holder of a note in the  principal  amount of
$100,000  (the  "DeVos  Note") in order to settle a lawsuit  filed  against  the
Company and William A. Carter by Mr. DeVos in the United States  District  Court
for the Southern  District of New York alleging  breach of contract,  conversion
and certain  violations of the federal  securities  laws in connection  with the
issuance of the DeVos Note. Pursuant to the settlement agreement,  principal and
interest on the DeVos Note were repaid by Ms. Azzato as well as certain expenses
incurred by Mr.  DeVos in the  approximate  amount of $2,600 and 1,536 shares of
Common  Stock of the Company  were  transferred  to Mr.  DeVos by Ms.  Azzato in
exchange for the assignment to Ms. Azzato by Mr. DeVos of the right to repayment
by the Company of the DeVos Note and warrants to purchase  1,667 share of Series
C Preferred  Stock.  In addition,  certain  options to purchase  6,912 shares of
Common Stock of the Company previously issued to Mr. DeVos were delivered to Mr.
DeVos. In exchange for the above  agreement,  Mr. DeVos, the Company and William
A. Carter  executed  mutual  releases of all claims and Mr. DeVos  dismissed the
suit.

     In September 1994, the Company incorporated three wholly-owned subsidiaries
- - BioPro Corp.  ("BioPro"),  Core BioTech,  Corp. ("Core BioTech") and BioAegean
Corp. - in Delaware.  In September 1994, the Company granted exclusive worldwide
licenses and/or sublicenses to certain of its patents and assigned certain other
patents  to BioPro  (the  "BioPro  License"),  Core  BioTech  (the  "CoreBiotech
License") and BioAegean (the "BioAegean  License").  Bridge Ventures,  which has
rights  in the  Company's  patents  pursuant  to the  collateralization  of such
patents in connection  with the 1994 Common Stock  Financing,  agreed to release
its rights in the  licensed  or  assigned  patents.  Harris  Freedman,  the Vice
President for Strategic  Alliances for the Company and  BioAegean,  and his wife
are officers of Bridge Ventures.

     In May 1994, the Company  entered into an agreement to borrow $100,000 from
Bridge  Ventures for 60 days in exchange for warrants to purchase  92,160 shares
of Common  Stock at $3.50 per  share.  In August  1994,  the  $100,000  loan was
converted to 200,000  shares of Common  Stock and  warrants to purchase  200,000
shares of Common Stock at an exercise price of $3.50 per share.  Bridge Ventures

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transferred  150,000 of its shares of Common  Stock to Gerald Kay, a director of
the Company. In addition,  Bridge Ventures received a $50,000 consulting fee for
general business and financial consulting services rendered from January 1994 to
July 1994, which it converted into 100,000 shares of Common Stock as part of the
1994 Common Stock Financing.  Harris Freedman, the Company's Vice President, and
his wife are officers of Bridge Ventures.  Pursuant to the agreement with Bridge
Ventures,  Messrs.  Kay,  Philipp  and  Rodino  were  elected  to the  Board  of
Directors.  In November 1994, each of Bridge Ventures and Gerald Kay sold 50,000
shares of  Common  Stock at a price of $.50 per  share to  Worldwide  Marketing.
Sharon Will, an officer of the Company, is President of Worldwide Marketing.

     In April  1994,  William  A.  Carter,  the  Company's  Chairman  and  Chief
Executive Officer,  purchased 20,000 shares of Series C Preferred Stock at $5.00
per share.  Also Maryann  Charlap  Azzato  purchased  30,000  shares of Series C
Preferred  Stock at $5.00 per share and agreed to purchase an additional  10,000
shares at $5.00 per share.

     In May 1994,  Maryann Charlap Azzato  guaranteed  payment of two promissory
notes in the  aggregate  amount of $76,000  payable by the Company  representing
payments due in connection with the Temple  Agreement (the "Temple  Notes").  In
return for the guarantee,  the Company assigned all rights,  patents and related
technology  in the Company's  Oragen and Diagen  products to Ms.  Azzato,  which
rights will revert to the Company upon  repayment of the principal on the Temple
Notes, 12% interest, and Ms. Azzato's fees and expenses which are expected to be
paid from the  proceeds of this Public  Offering.  The Company  also  received a
right of first  refusal with respect to the sale or  assignment by Ms. Azzato of
this technology.

     In January  1994,  William A.  Carter,  the  Company's  Chairman  and Chief
Executive Officer,  sold an aggregate of 122,880 shares of Common Stock at $3.26
per  share  for an  aggregate  price  of  $400,000  to  Michael  Dubilier,  Keys
Foundation,  Canaan  Venture  Limited  Partnership  ("Canaan  Venture"),  Canaan
Venture Offshore Limited Partnership,  C.V. ("Canaan Offshore"), James Tisch and
an  unaffiliated  individual.  Using  the  proceeds  of this  sale,  Dr.  Carter
purchased  80,000 shares of Series C Preferred Stock at $5.00 per share from the
Company. In addition,  Maryann Charlap Azzato purchased 3,600 shares of Series C
Preferred  Stock at $5.00 for an aggregate  price of $18,000,  representing  her
remaining commitment under the 1993 Standby Financing Agreement.

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DESCRIPTION OF SECURITIES

     The Company is authorized to issue up to 50,000,000 shares of Common Stock,
$.001 par value per share,  and 5,000,000  shares of Preferred  Stock,  $.01 par
value per share.

Common Stock

     As  of  July  10,  1996,  there  were  9,470,675  shares  of  Common  Stock
outstanding  and  subscribed  held of record by 331  stockholders.  In addition,
there were 6,117,167  Units  outstanding,  each Unit  consisting of one share of
Common Stock and one Class A Redeemable Warrant. The holders of Common Stock are
entitled  to one vote per share on all  matters to be voted on by  stockholders,
and  stockholders  have  no  rights  to  cumulative  votes  in the  election  of
directors. Subject to prior dividend rights and preferences of holders of shares
of Preferred Stock, if any, holders of Common Stock are entitled to receive such
dividends  as may be  declared  by the Board of  Directors  from  funds  legally
available therefor.  Upon liquidation or dissolution of the Company,  subject to
prior  liquidation  rights of holders of Preferred  Stock, if any, the assets of
the Company  available for  distribution  to  stockholders  will be  distributed
ratably among the holders of Common  Stock.  The holders of Common Stock have no
preemptive  or  other  subscription  rights  and  there  are  no  conversion  or
redemption or sinking fund  provisions  with respect to such shares.  All of the
outstanding  shares of Common  Stock are fully  paid and  nonassessable  and the
shares of Common Stock sold by the Company in this  offering  will be fully paid
and nonassessable.

Preferred Stock

     As of July 10, 1996,  there were 6,000  shares of Series D Preferred  Stock
which were issued and subscribed.  These Preferred  shares are convertible  into
Common Stock.

     The Board of Directors are  authorized,  without  further action or vote of
the  stockholders,  to issue up to 4,400,000 shares of Preferred Stock in one or
more series and to fix the rights,  preferences,  privileges  and  restrictions,
including the dividend  rights,  conversion  rights,  voting rights,  rights and
terms of redemption, redemption price or prices, liquidation preferences and the
number of shares constituting any series or the designations of such series. The
Company has no present plans to issue any shares of Preferred Stock. Issuance of
Preferred Stock, which may be accomplished  through a public offering, a private
placement or otherwise  may dilute the voting power of holders of Common  Stock,
may render  more  difficult  the  removal of  current  management,  even if such
removal may be in the  stockholders'  best interest,  and may have the effect of
delaying, deferring or preventing a change in control of the Company.

Warrants

     In  connection  with  various debt  financings  and other  agreements,  the
Company has issued Warrants to acquire an aggregate of up to 6,013,630 shares of
the Company's  Common Stock at a weighted  average  exercise  price of $3.15 per

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<PAGE>

share.  In  addition,  the  Company  issued Rule 701  Warrants to the  Company's
directors  and certain  officers in October and  November  1994,  to purchase an
aggregate  of  2,080,000  shares  of  Common  Stock  at  $3.50  per  share.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations" and "Certain  Transactions."  All of these warrants,  except for (i)
the Rule 701 Warrants which vest in 1/3  increments  over 36 months and (ii) the
100,000  warrants  which  may be issued to The Sage  Group  which  vest upon the
occurrence of certain conditions, are currently exercisable by the holders.

Class A Redeemable Warrants

     The Class A Redeemable Warrants, totaling 6,313,000, (including the Class A
Redeemable  Warrants  included  in the  Bridge  Units  which are  issuable  upon
exercise of the  Bridgeholder  Options),  are issued  pursuant to an  agreement,
dated  November  2, 1995 (the  "Warrant  Agreement"),  between  the  Company and
Continental  Stock  Transfer  and  Trust  Company  (the  "Warrant  Agent").  The
following  discussion of certain terms and  provisions of the Class A Redeemable
Warrants is qualified in its entirety by reference to the detailed provisions of
the Warrant Agreement.

     Each Class A  Redeemable  Warrant  represents  the right of the  registered
holder to  purchase  one share of Common  Stock at an  exercise  price  equal to
$4.00,  subject to adjustment  (the  "Purchase  Price").  The Class A Redeemable
Warrants will be entitled to the benefit of  adjustments  in the Purchase  Price
and in the number of shares of Common Stock and/or other securities  deliverable
upon the  exercise  thereof  in the  event  of a stock  dividend,  stock  split,
reclassification,  reorganization,  consolidation,  merger  or the  issuance  of
Common  Stock or options to purchase  Common Stock at a price below the Purchase
Price then in effect.  The Company has the right to reduce the Purchase Price or
increase the number of shares of Common Stock  issuable upon the exercise of the
Class A Redeemable Warrants.

     Unless  previously  redeemed,  the  Class  A  Redeemable  Warrants  may  be
exercised  at any time  commencing  November  2,  1996 and prior to the close of
business  on  November  2,  2000  (the  "Expiration  Date").  On and  after  the
Expiration  Date, the Class A Redeemable  Warrants  become wholly void and of no
value.  The Company may, upon 30 days written notice to all holders of the Class
A Redeemable  Warrants,  reduce the exercise price or extend the Expiration Date
of all outstanding  Redeemable  Warrants for such increased period of time as it
may determine. The Class A Redeemable Warrants may be exercised at the office of
the Warrant Agent.

     The Company has the right at any time after  November 2, 1997 to redeem the
Class A Redeemable Warrants at a price of $.05 each, by written notice mailed 30
days prior to the redemption  date to each Class A Redeemable  Warrant holder at
his address as it appears on the books of the Warrant  Agent.  Such notice shall
only be given within 10 days following any period of 20 consecutive trading days
during  which the high  closing bid price of the shares of Common Stock (if then
traded on the  Nasdaq  or on a  national  securities  exchange)  exceeds  $9.00,
subject to adjustments  for stock  dividends,  stock splits and the like. If the

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Class A Redeemable  Warrants are called for  redemption,  they must be exercised
prior  to the  close  of  business  on the  date  prior  to the date of any such
redemption or the right to purchase the  applicable  shares of Common Stock will
lapse.

     No holder,  as such,  of Class A Redeemable  Warrants  shall be entitled to
vote or receive  dividends or be deemed the holder of shares of Common Stock for
any purpose  whatsoever  until such Class A Redeemable  Warrants  have been duly
exercised and the Purchase Price has been paid in full.

     If required,  the Company will file a new  registration  statement with the
Commission  with  respect to the  securities  underlying  the Class A Redeemable
Warrants prior to the exercise of the Class A Redeemable  Warrants and deliver a
prospectus  with respect to such  securities  to all Class A Redeemable  Warrant
holders as  required  by  Section  10(a)(3)  of the  Securities  Act.  See "Risk
Factors--Current  Prospectus  and State  `Blue  Sky'  Registration  Required  to
Exercise the Redeemable Warrants."

Units

     Pursuant to the IPO in November  1995,  the Company  registered  and issued
5,313,000,  each Unit  consisting  of one share of Common  Stock and one Class A
Warrant. As of July 10, 1996 there were 6,117,167 Units outstanding. On July 12,
1996, the Units were separated. Currently, the Company's Units, Common Stock and
Class A Warrants are traded publicly.

Bridge Units

     In connection  with the Bridge Loans,  the Company issued to the holders of
the Bridge Loans Bridgeholders  Options to purchase 1,000,000 Bridge Units at an
exercise price of $.50 per Bridge Unit.  Each Bridge Unit  originally  contained
one  share of  Common  Stock,  one Class A  Redeemable  Warrant  and one Class B
Redeemable Purchase Warrant (collectively,  the "Class B Warrants"). The Company
and the  purchasers  have  amended  the Bridge  Units to  eliminate  the Class B
Warrants  such that each Bridge Unit  contains one share of Common Stock and one
Class A Redeemable Warrant. The Company has registered the Bridgeholder Options,
900,000 of the Bridge  Units and the 900,000  shares of Common Stock and 900,000
Class A  Redeemable  Warrants  contained  in the Bridge  Units for resale in the
Concurrent  Offering,  although the Company will not receive any of the proceeds
from the sale of such securities.  The Class A Redeemable  Warrants  included in
the Bridge Units are identical to the Class A Redeemable Warrants offered by the
Company in the IPO. The holders of the  Bridgeholder  Options may exercise  such
options at an exercise price of $.50 per Bridge Unit to obtain such Bridge Units
at any time.  The Bridge  Units and the  securities  contained  therein  are not
transferable  until the  earlier of 13 months  from  November 2, 1995 or at such
earlier date as may be permitted by the Company.  The securities  underlying the
Bridge  Units  shall not be  traded  separately  for a period of 12 months  from
November 2, 1995 without prior written consent of the Company.

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<PAGE>

     In November 1995,  Bridge Unit holders  exercised 797,917 Units at $.50 per
Unit. In May 1996, one Bridge Unit holder exercised 6,250 Units.

Rule 701 Warrants

     In October 1994, the Company issued  2,080,000  warrants to purchase Common
Stock at  $3.50  per  share  pursuant  to Rule  701  under  the Act  ("Rule  701
Warrants")  to certain  officers and  employees  of the Company.  These Rule 701
Warrants  vest  in 1/3  increments  over a  thirty  six  month  period  and  are
exercisable  until  September 30, 1999. In the event that the number of Rule 701
Warrants issued by the Company  exceeds the aggregate  monetary limits set forth
under Rule 701,  the number of Rule 701  Warrants  issued to the holders will be
reduced  pro  rata  and  the  remaining  warrants  will  not be  subject  to the
provisions of Rule 701. See "Shares  Eligible for Future Sales and  Registration
Rights."

Delaware Law and Certain Charter and By-Law Provisions

     The Company will be subject to the provisions of Section 203 of the General
Corporation  Law of Delaware.  Section 203  prohibits a  publicly-held  Delaware
corporation  from  engaging  in a  "business  combination"  with an  "interested
stockholder"  for a period of three years after the date of the  transaction  in
which  the  person  became  an  interested  stockholder,   unless,  among  other
exceptions,  the business  combination is approved by (i) the Board of Directors
prior to the date the  interested  stockholder  obtained such status or (ii) the
holders of two-thirds of the outstanding shares of each class or series of stock
entitled to vote  generally in the election of directors,  not  including  those
shares owned by the interested  stockholder.  A "business  combination" includes
mergers,  asset sales and other transactions resulting in a financial benefit to
the  interested  stockholder.  Subject to  certain  exceptions,  an  "interested
stockholder" is a person who, together with affiliates and associates,  owns, or
within three years did own, 15% or more of the corporation's voting stock.

     The Company's  By-Laws  contain a provision  whereby a  stockholder  of the
Company may nominate an individual or  individuals  for election to the Board of
Directors only if such nomination is made in writing (i) at least ninety days in
advance of the Company's  annual  meeting of  stockholders  or (ii) within seven
days following  notice of a special meeting of stockholders  for the election of
directors.  Accordingly,  it will be more difficult for stockholders,  including
those holding a majority of the outstanding shares, to force an immediate change
in the composition of the Board of Directors.

     The Company's  Certificate of  Incorporation  contains  certain  provisions
permitted  under  the  General  Corporation  Law  of  Delaware  relating  to the
liability of  directors.  The  provisions  eliminate a director's  liability for
monetary damages for a breach of fiduciary duty, except in certain circumstances
involving  wrongful acts,  such as the breach of a director's duty of loyalty or
acts or omissions which involve intentional misconduct or a knowing violation of
law. The Company's  Certificate  of  Incorporation  also contains  provisions to

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<PAGE>

indemnify  its  directors  and officers to the fullest  extent  permitted by the
General   Corporation   Law  of   Delaware.   The  Company   has  entered   into
indemnification  agreements  with  its  current  directors  and  certain  of its
executive officers.  These agreements have the practical effect in certain cases
of eliminating the ability of stockholders to collect monetary damages from such
individuals.  The Company  believes that these  provisions and  agreements  have
assisted the Company in attracting and retaining qualified  individuals to serve
as directors and officers.

Transfer Agent and Registrar

     The transfer agent and registrar for the Company's Units,  Common Stock and
Class A Redeemable  Warrants is Continental Stock Transfer and Trust Company,  2
Broadway, New York, New York 10004.

Nasdaq Quotation

     The  Company's  Units  Common  Stock and  Warrants  have been  approved for
trading  on  Nasdaq,   under  the  trading   symbols  HEMXU,   HEMX  and  HEMXW,
respectively.

Shares Eligible for Future Sale and Registration Rights

     The Company has  15,587,842  shares of Common Stock  outstanding as of July
10, 1996 including the Common Stock included in the 6,117,167 Units  outstanding
(each  Unit  consists  of one share of Common  Stock and one Class A  Redeemable
Warrant).  There are 195,833 unexercised Bridgeholder Options (consisting of one
share of Common Stock and one Class A Warrant)  outstanding.  In  addition,  the
Company  has  9,470,675  shares of  Common  Stock,  228,502  stock  options  and
7,997,797 Warrants outstanding.  All of these shares, options and Warrants other
than the 6,117,167  outstanding Units and the 195,833  Bridgeholder Options were
issued in private  transactions not involving a public offering and,  therefore,
are treated as "restricted  securities"  subject to the restrictions of Rule 144
under the Act. Restricted securities may not be resold except in compliance with
the registration  requirements of the Act or pursuant to an exemption therefrom,
such as the exemptions provided by Rule 144 and Rule 144A.

     In general,  under Rule 144 as  currently  in effect,  a person (or persons
whose shares are  aggregated),  including an affiliate  (as that term is defined
under  the  rules  and  regulations  of the  Act),  who has  beneficially  owned
"restricted  securities"  for at least two years will be entitled to sell within
any three  month  period a number of shares  that does not exceed the greater of
(i) 1% of the then outstanding shares of Common Stock (approximately  15,587,842
shares) or (ii) the average  weekly  trading  volume in the Common  Stock on all
national  securities  exchanges and/or reported through the automated  quotation
system of registered  securities  associations  during the four  calendar  weeks
immediately  preceding  the date on which  notice of the sale is filed  with the
Commission.  Sales  pursuant  to Rule  144 are also  subject  to  certain  other
requirements  regarding the manner of sale,  notice and  availability of current
public  information  about the  Company.  A person (or persons  whose shares are
aggregated)  who is not deemed to have been an  affiliate  of the Company at any

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<PAGE>

time during the three months immediately  preceding the sale is entitled to sell
restricted  securities pursuant to Rule 144(k) without regard to the limitations
described  above,  provided that three years have expired since the later of the
date on which such  restricted  securities were acquired from the Company or the
date they were acquired from an affiliate of the Company. Affiliates,  including
members of the Board of  Directors  and  certain of the  officers of the Company
continue  to be  subject  to  such  limitations.  As  defined  in Rule  144,  an
"affiliate" of an issuer is a person that directly, or indirectly through one or
more  intermediaries,  controls or is controlled  by, or is under common control
with, such issuer.

     Subject  to  certain  limitations  on the  aggregate  offering  price  of a
transaction and other conditions, Rule 701 under the Act may be relied upon with
respect to the resale of securities originally purchased from the Company by its
employees,  directors,  officers,  consultants or advisers between May 20, 1988,
the  effective  date of Rule 701,  and  November  2, 1995 (the date the  Company
became subject to the reporting  requirements  of the Act),  pursuant to written
compensatory  benefit plans or written contracts relating to the compensation of
such persons.  Shares of Common Stock of the Company  issued in reliance on Rule
701 are  deemed to be  restricted  stock and may be sold by  persons  other than
affiliates  subject  only to the  manner of sale  provisions  of Rule 144 and by
affiliates  under Rule 144 without  compliance with its two year minimum holding
period  requirements.  The  Company  has issued  Rule 701  Warrants  to purchase
2,080,000  shares of  Common  Stock at an  exercise  price of $3.50 per share in
reliance  upon Rule 701.  All shares  which may qualify for sale under Rule 701,
however, are subject to a two year lockup.

     The  Company  has  secured  written  agreements  from  all of  the  current
shareholders,   except  as  described  below,  not  to  sell,  assign,   pledge,
hypothecate  or otherwise  dispose of  (collectively,  "Transfer"),  directly or
indirectly,  any shares of Common Stock and to waive all registration rights for
a period of 24 months  from  November  2, 1995,  subject to certain  exceptions,
without  the prior  written  consent of the  Company.  The Company has agreed to
certain  exceptions to its request as follows.  William A. Carter, the Company's
President,  Chief Executive  Officer and Chairman who holds 1,065,235  shares of
Common Stock,  has agreed not to sell or transfer his securities for a period of
36  months  from  November  2,  1995.  Holders  of  the  Bridge  Notes  who  own
Bridgeholder  Options to purchase up to 1,000,000  Bridge Units in the aggregate
and the  holder of 5,898  shares  of Common  Stock  have  agreed  not to sell or
transfer  their  securities  for a period of 13  months  without  the  Company's
consent. In addition,  pursuant to the Tisch/Tsai Restructuring,  the Tisch/Tsai
Entities, which hold an aggregate of 485,832 shares of Common Stock, have agreed
with the Company not to exercise their registration rights or otherwise transfer
any securities held by them except to certain permitted transferees for a period
of 18 months commencing November 2, 1995 in the event that the affiliates of the
Company  agree to  terms  no more  advantageous  that  those  of the  Tisch/Tsai
Entities  for a period of 24 months  commencing  November  2, 1995.  The lock-up
period for the Tisch/Tsai  Entities shall  terminate in the event that any other
securityholders  of the Company other than the holders of the Bridge Loans shall
be released from their lock-up periods. In addition, the Canaan Entities,  which
hold an  aggregate  of  511,220  shares of Common  Stock,  Michael  Dubilier,  a
principal  stockholder  of the Company who  beneficially  owns 689,780 shares of

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Common Stock,  and three  holders of an aggregate of 1,253,227  shares of Common
Stock  have  agreed  not to  exercise  their  registration  rights or  otherwise
transfer  any  securities  held by them for a  period  of 18  months  commencing
November 2, 1995. The lock-up period for the Canaan  Entities,  Michael Dubilier
and the holder of 18,432  shares of Common  Stock shall  terminate  in the event
that any other  securityholders  of the  Company  shall be  released  from their
lock-up periods. In addition,  the Company has decided not to seek an additional
restriction  on the sale of the shares  owned by Mr.  Cohn and  certain  related
parties,  all of whom hold warrants to purchase  156,672 shares of Common Stock.
See "Business--Legal  Proceedings." The Company believes, however, that pursuant
to the terms of the  Series A  Purchase  Agreement,  as  amended,  Mr.  Cohn and
related  parties are subject to a 180-day  restriction  of the Transfer of their
securities.  In addition,  as of October 25, 1995, the holders of  approximately
10% of the Company's securities had not executed lock-up agreements.

     Under the terms of a Registration  Rights Agreement,  dated May 9, 1989, as
amended,  by and among the  Company  and E. Paul  Charlap,  Michael C.  Burrows,
Martin H. Dubilier,  Keys Foundation and James S. Tisch, if the Company proposes
to  register  any of its  securities  under the Act,  other than  pursuant to an
initial public  offering or a  registration  statement on Forms S-8 or S-4, such
holders, or their successors, are entitled to notice of such registration and to
include  their  shares of Common  Stock in such  registration.  These rights are
subject  to  certain  conditions  and  limitations,  including  the right of the
underwriter to limit the number of shares included in such registration. Certain
of such holders may require the Company to file a Registration  Statement  under
the Act at the  Company's  expense with respect to their shares of Common Stock,
and the Company is required to use its best efforts to effect such registration,
subject to certain conditions and limitations. Further, such holders may require
the Company to file additional  registration  statements on Form S-3, subject to
certain  conditions and  limitations.  The parties to this  Registration  Rights
Agreement  have  subordinated  their rights therein to the  registration  rights
granted  under the Series A Purchase  Agreement  (as  described  below),  to the
extent of any  conflict  between  the  registration  rights  granted  by the two
agreements.  These  registration  rights  have been  waived by the holders for a
period of two years commencing November 2, 1995.

     Under the terms of the  Series A Purchase  Agreement,  as  amended,  if the
Company proposes to register any of its securities under the Act, either for its
own  account  or for the  account  of any other  security  holders,  other  than
pursuant to an initial public  offering,  such persons are entitled to notice of
such registration to include their shares of Common Stock in such  registration.
These rights are subject to certain  conditions  and  limitations  including the
right of the  underwriters  to limit  the  number  of  shares  included  in such
registration.  Certain of such  holders may require the Company on not more than
two occasions,  to file a Registration  Statement under the Act at the Company's
expense  with  respect  to their  shares of Common  Stock,  and the  Company  is
required to use its best efforts with respect to such  registration,  subject to
certain conditions and limitations. Further, certain of such holders may require
the Company to file additional  Registration  Statements on Form S-3, subject to
certain conditions and limitations. In addition,  notwithstanding the foregoing,
the Agreement  provides that immediately prior to the IPO, as well as subsequent
to the IPO, the Company was obligated to file a "shelf"  registration  statement

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pursuant to Rule 415 of the Act with respect to shares of Common Stock  issuable
pursuant to the  exercise of the  outstanding  warrants  and/or  pursuant to the
conversion  of any notes then  outstanding,  which were  issued  pursuant to the
February 1992 Investor  Loan,  as amended by the Cohn  Amendment,  and June 1993
Investor Loan.  Such "shelf"  registration  statements  must be kept current and
effective by the Company for a maximum of four years. As a condition of the IPO,
registration  rights,  with the exception of two holders have been waived by the
holders.

     The Tisch/Tsai Entities have an additional piggyback  registration right of
20% of their shares of Common Stock in the event that the Company shall register
securities  in a  secondary  offering  expected  to result in gross  proceeds in
excess of $10 million. In addition, the Company, at its sole expense, has agreed
to take all necessary  actions to register all securities held by the Tisch/Tsai
Entities  after the  expiration of the 18 month lock-up  period.  For six months
following the expiration of the lock-up period, the Tisch/Tsai Entities may sell
no more than 25,000 shares pursuant to such registration per quarter.

     All sales of  securities  pursuant to Rule 144 by the  Tisch/Tsai  Entities
during the 24-month  affiliate  lock-up period, if any, will be made through the
Representative,  as broker, provided that all other Rule 144 sales by affiliates
during  the   affiliate   lock-up   period  shall  be   conducted   through  the
Representative.

     Pursuant  to the 1994  Common  Stock  Financing,  the  Company  has granted
certain demand  registration rights to the holders of 2,050,000 shares of Common
Stock. If holders of 50% or more of these shares give the appropriate  notice to
the Company,  the Company will file a new  registration  statement under the Act
with respect to these  shares.  These  holders are subject to a 24 month Lock Up
Agreement as described above. Jerome Belson has agreed to waive his registration
rights granted in connection with the 1994 Common Stock Financing

     The holders of the Bridge  Units have  agreed not to sell the Bridge  Units
for a period of 13 months from November 2, 1995,  subject to earlier  release at
the Company's  discretion.  Jerome Belson,  owner of 100,000  Bridge Units,  has
agreed to waive his registration rights in connection with the Bridge Financing.

     In connection  with the  restructuring  of the Original  Brauser Note,  the
Company has granted to Gerald Brauser a one-time,  piggyback  registration right
to register 75,000 shares of Common Stock  underlying the warrants issued to Mr.
Brauser,  subject  to the  discretion  of the  underwriter  of  such  subsequent
offering.  In addition,  the Company has granted Mr. Brauser registration rights
for 100,000 shares of Common Stock issued pursuant to this restructuring,  which
rights are  identical  to those  granted to the  holders of the shares of Common
Stock issued in  connection  with the 1994 Common Stock  Financing (as described
above); these rights of Mr. Brauser, however, are exercisable only if holders of
50% or more of the shares of Common  Stock  issued in  connection  with the 1994
Common  Stock  Financing  give notice and elect to exercise  their  rights.  Mr.
Brauser has entered into a 24-month Lock Up Agreement as described above.

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<PAGE>

     In connection  with the extension of a note,  the Company  granted to Myron
Cherry  either  registration  rights for  certain  securities  owned by him or a
reduction in the exercise  price of his options to $1.75 per share.  Because Mr.
Cherry has not advised the Company of his election,  the Company has reduced the
exercise price of his warrants to $1.75 per share.

                                  LEGAL MATTERS

     The validity of the  securities  offered hereby will be passed upon for the
Company by Silverman, Collura & Chernis, P.C., New York, New York.

                                     EXPERTS

     The consolidated  financial  statements of Hemispherx  BioPharma,  Inc. and
subsidiaries  as of December 31, 1994 and 1995, and for each of the years in the
three year period ended December 31, 1995,  have been included herein and in the
registration  statement  in reliance  upon the report of KPMG Peat  Marwick LLP,
independent  certified public accountants,  appearing elsewhere herein, and upon
the authority of said firm as experts in accounting and auditing.

                             ADDITIONAL INFORMATION

     The  Company is subject to the  reporting  requirements  of the  Securities
Exchange Act of 1934,  as amended (the  "Exchange  Act").  The Company has filed
with the Securities and Exchange Commission (the  "Commission"),  a Registration
Statement on Form S-1  (including  any  amendments  thereto,  the  "Registration
Statement")  under  the  Act.  This  Prospectus  does  not  contain  all  of the
information  set  forth  in the  Registration  Statement  and the  exhibits  and
schedules thereto.  For further  information with respect to the Company and the
Common Stock, reference is made to the Registration Statement,  and the exhibits
and  schedules  thereto.  Statements  contained  in  this  Prospectus  as to the
contents of any contract or any other document are not necessarily complete and,
in each  instance,  reference  is made to the copy of such  contract or document
filed as an exhibit to the Registration  Statement.  The Registration  Statement
and the exhibits and the  schedules  thereto  filed with the  Commission  may be
inspected,  without charge, at the public reference facilities maintained by the
Commission at Room 1024,  Judiciary  Plaza, 450 Fifth Street,  N.W.  Washington,
D.C. 20549,  and at the  Commission's  Regional Offices at 7 World Trade Center,
13th Floor,  New York, New York 10048 and Northwestern  Atrium Center,  500 West
Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of such material may
also be obtained upon written request from the Public  Reference  Section of the
Commission at 450 Fifth Street,  N.W.,  Washington,  D.C.  20549,  at prescribed
rates.

                                       100


<PAGE>

                                GLOSSARY OF TERMS

25A:                2", 5"  oligoadenylate;  a short polymer of ribonucleic acid
                    containing the base adenine.

25A Synthetase:     A  set  of  specific  enzymes  that  join  together  certain
                    building  blocks,  termed  nucleotides,  to form 2-5A;  2-5A
                    synthetase  must  be  activated  by  a  double-stranded  RNA
                    molecule.

AIDS:               Acquired Immunodeficiency  Syndrome; a disease caused by HIV
                    infection  due  to the  progressive  decline  in the  body's
                    immune system leading to fatal infections or malignancies.

Analogue:           A  chemical  compound  with a  structure  similar to that of
                    another  compound,  but  differing  from it in  respect to a
                    certain component.

Antiviral:          Destroying viruses or suppressing their replication.

CD4:                A  certain  type of  immune  cell  which  protects  the body
                    against foreign organisms such as bacteria and viruses.

Controlled Study:   A  clinical  trial  in  which  patients  are  divided   into
                    two groups, one of which receives the drug being tested, and
                    the second of which receives  either a saline  solution (see
                    definition  of  "Placebo")  or another drug  purported to be
                    clinically  beneficial in the treatment of the indication in
                    question.  In trials where the second group receives  saline
                    solution, the study is referred to as  "placebo-controlled".
                    In trials where the second group  receives a drug  purported
                    to be beneficial,  the study is referred to as  "active-con-
                    trolled".

Cytokine:           Proteins  released by a cell  population  on contact  with a
                    stimulus, which act as intracellular mediators.

Double-Blind:       Refers to a study where neither the patient nor the treating
                    physician  knows  whether the patient is being  administered
                    with drug or placebo.

Enzyme:             A protein  that  accelerates  a chemical  reaction  of other
                    substances in the body.

FDA:                Food and Drug Administration; the United States governmental
                    agency with authority for drug approval. Good Laboratory

Practice            (GLP):  Federal  regulations  which govern the generation of
                    laboratory data in a manner that is acceptable to the FDA in
                    its  review of  ongoing  studies  and New Drug  Applications
                    (NDA) for marketing approval.

HIV:                Human-immunodeficiency virus; the virus which causes AIDS.

                                       101


<PAGE>

Interferon:         IFN; A family of proteins  that exert  anti-viral  activity;
                    interferons  also  have  immune  regulatory  and  anti-tumor
                    activities.  IFN  can  be  classified  into  three  distinct
                    classes termed alpha, beta or gamma.

Interleukin:        A group of protein factors, produced by immune cells.

In                  vitro:  Refers to studies  taking place within an artificial
                    environment such as a test tube.

In vivo:            Refers to studies taking place within a living body.

Lymphokine:         Antiviral  and  anticancer  products,  such  as  interferon,
                    produced by certain types of blood cells.

Macrophage:         A blood cell which ingests foreign substances.

Multicenter:        Refers to a trial conducted at more than one clinical site.

Oncogene:           Refers to genes with the  capacity  to cause  production  or
                    growth of a tumor.

Open-Label:         Refers to a study where both the  patient  and the  treating
                    physician  know  the  identity  of the  drug  which is being
                    administered.

Placebo:            A dummy  treatment  administered  to the control  group in a
                    controlled  clinical  trial  in  order  to  distinguish  the
                    specific  and  nonspecific   effects  of  the   experimental
                    treatments.

Placebo-Controlled: Refers to a trial in which a portion of the patients receive
                    a drug and a portion of the patients receive a placebo,  and
                    the  activity of the drug is compared to the activity of the
                    placebo.

Protein Kinase:     Refers to an enzyme which can  modify other  protein factors
                    leading to inhibition of viral  replication  or  tumor  cell
                    growth.

Randomized:         Refers to a  procedure  where the  treatment  that a patient
                    will  receive  (i.e.  the  active  drug  or  a  placebo)  is
                    determined by chance.

Ribonuclease:       Any enzyme that decomposes  ribonucleic acids, such as viral
                    RNA.

Ribonuclease L:     A specific  ribonuclease  that is present  in  human  cells,
                    but dormant  (inactive)  until  activated  by 2-5A or Oragen
                    drugs. 

Transitory    
  Response:         A tumor  response which is  characterized  by the subsequent
                    recurrence of disease  (notwithstanding  the continuation of
                    treatment) after a limited period of time.

                                       102

<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES

                   Index to Consolidated Financial Statements
                                        
                                                                            Page
                                                                            ----
Independent Auditors' Report...............................................  F-2

Consolidated Balance Sheets at December 31, 1994 and 1995,
 and the unaudited Consolidated Balance Sheet at
 March 31, 1996 ...........................................................  F-3

Consolidated Statements of Operations for each of the years in the  
  three-year period ended December 31, 1995, and the unaudited three month 
  periods ended March 31, 1995 and 1996....................................  F-4

Consolidated Statements of Stockholders' Equity(Deficit) for each of 
  the years in the three-year period ended December 31, 1995, and the 
  unaudited three month period ended March 31, 1996........................  F-5

Consolidated Statements of Cash Flows for each of the years in the  
  three-year period ended December 31, 1995, and the unaudited three month 
  periods ended March 31, 1995 and 1996....................................  F-6

Notes to Consolidated Financial Statements.................................  F-8


<PAGE>

                          INDEPENDENT AUDITORS' REPORT

The Board of Directors and Stockholders
Hemispherx BioPharma, Inc.:

     We have audited the accompanying  consolidated balance sheets of Hemispherx
BioPharma, Inc. and subsidiaries (the Company) as of December 31, 1994 and 1995,
and  the  related   consolidated   statements   of   operations,   stockholders'
equity(deficit),  and cash flows for each of the years in the three-year  period
ended  December  31,  1995.  These  consolidated  financial  statements  are the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these consolidated financial statements based on our audits.

     We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion,  the consolidated  financial  statements  referred to above
present fairly, in all material  respects,  the financial position of Hemispherx
BioPharma,  Inc.  and  subsidiaries  as of December  31, 1994 and 1995,  and the
results  of their  operations  and their cash flows for each of the years in the
three-year period ended December 31, 1995 in conformity with generally  accepted
accounting principles.



                                                      KPMG PEAT MARWICK LLP

March 1, 1996, except for paragraph 4 
of Note 14, which is as of March 21, 1996.
Miami, Florida

                                       F-2


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
                           Consolidated Balance Sheets
                  December 31, 1994 and 1995 and March 31, 1996
<TABLE>
<CAPTION>

                                                                 December 31,                    March 31,
                                                       ------------------------------           ----------
                                                                                                (unaudited
                                                          1994                1995                  1996
                                                          ----                ----                  ----
                                     ASSETS
<S>                                                    <C>                 <C>                   <C>
Current assets:       
 Cash and cash equivalents......................       $   61,005          $11,291,167           $3,620,343
 Prepaid expenses and other current assets......            2,757               62,742               79,485
                                                       ----------          -----------           ----------
    Total current assets........................           63,762           11,353,909            3,699,828
Property and equipment, net ....................          104,328               53,953               73,616
Patent and trademarks rights, net...............        1,434,420            1,245,092            1,288,221
Security deposits...............................           48,931               46,564               17,761
                                                       ----------          -----------           ----------
    Total assets................................       $1,651,441          $12,699,518           $5,079,426
                                                       ==========          ===========           ==========
                                                                              
                  LIABILITIES AND STOCKHOLDERS' EQUITY(DEFICIT)

Current liabilities:
 Installments of obligation under
   capital leases...................................   $   23,308         $         --       $           --
 Accounts payable...................................    2,251,721            1,095,637              847,650
 Accrued expenses (note 5)..........................    2,296,855            2,263,096              482,750
 Notes payable (note 3).............................    5,045,000            4,920,000                   --
 Stockholder notes payable (note 4).................    3,425,910                   --                   --
                                                       ----------           ----------        -------------
    Total current liabilities.......................   13,042,794            8,278,733            1,330,400
                                                     
Commitments and contingencies (notes 3, 4, 6,        
  8, 9, 10, 11, 12 and 14)                           
                                                     
Redeemable preferred stock (note 7).................    3,238,334                   --                   --
                                                     
Stockholders' equity(deficit) (notes 4, 6 and 7):          
  Preferred stock subscribed........................    4,772,233                   --                   --
  Common stock subscribed...........................    1,061,331                   --                   --
  Preferred stock...................................    7,200,017                   --                   --
  Common stock......................................        5,136               15,581               15,581
  Additional paid-in capital........................   14,036,082           47,949,530           47,949,530
  Accumulated deficit...............................  (41,704,486)         (43,544,326)         (44,216,085)
                                                       ----------           ----------        -------------
    Total stockholders' equity(deficit).............  (14,629,687)           4,420,785            3,749,026
                                                       ----------           ----------        -------------
    Total liabilities and stockholders' equity......   $1,651,441          $12,699,518           $5,079,426
                                                       ==========          ===========           ==========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-3


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
                      Consolidated Statements of Operations
     For each of the years in the three-year period ended December 31, 1995
       and the unaudited three month periods ended March 31, 1995 and 1996

<TABLE>
<CAPTION>

                                                                    December 31,                      Three Months Ended March 31,
                                                ----------------------------------------------       ------------------------------
                                                     1993            1994              1995             1995               1996
                                                     ----            ----              ----             ----               ----
                                                                                                              (Unaudited)
<S>                                             <C>              <C>               <C>               <C>               <C>         
Revenues:
 Research and development .................     $    48,000      $     75,758      $     65,910      $     11,300      $     18,354
 License fees .............................            --             100,000         2,900,000           750,000              --
                                                -----------      ------------      ------------      ------------      ------------
    Total revenues ........................          48,000           175,758         2,965,910           761,300      $     18,354
                                                -----------      ------------      ------------      ------------      ------------
Costs and expenses:
 Research and development .................       2,118,896         1,637,769         1,028,662           257,820           298,700
 General and administrative ...............       3,347,476         2,617,762         2,880,443           697,594           513,813
                                                -----------      ------------      ------------      ------------      ------------
    Total cost and expenses ...............       5,466,372         4,255,531         3,909,105           955,414           812,513
Debt conversion expense ...................      (1,214,500)          (10,500)         (149,384)         (149,384)             --
Interest income ...........................          18,427            25,091            95,887             2,835           122,400
Interest expense ..........................      (1,087,605)       (1,067,869)         (843,148)         (245,984)             --
                                                -----------      ------------      ------------      ------------      ------------
   Net loss ...............................     $(7,702,050)     $ (5,133,051)     $ (1,839,840)     $   (586,647)     $   (671,759)
                                                ===========      ============      ============      ============      ============
Pro forma net loss and net loss per
  share (note 2(e)):
  Pro forma weighted average shares
  outstanding .............................            --          11,536,276        14,199,701        13,014,174
  Pro forma net loss per share ............            --        $       (.44)     $       (.13)     $       (.05)
                                                                 ============      ============      ============
Weighted average shares outstanding .......            --                --                --                --          15,581,592
Net loss per share ........................            --                --                --                --        $       (.04)
                                                                                                                       ============
</TABLE>
          See accompanying notes to consolidated financial statements.

                                       F-4

<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
            Consolidated Statements of Stockholders' Equity(Deficit)
     For each of the years in the three-year period ended December 31, 1995
            and the unaudited three month period ended March 31, 1996
<TABLE>
<CAPTION>
                                         Preferred      Common                    
                                           stock         stock       Preferred       Common       Preferred      Common     
                                        subscribed    subscribed       stock          stock         stock         stock     
                                          shares        shares        shares         shares      subscribed    subscribed   
                                          ------        ------        ------         ------      ----------    ----------   
<S>                                      <C>           <C>            <C>           <C>        <C>              <C>         
Balance at December 31, 1992..........          --           --       810,029       5,133,986  $          --    $      --   
 Preferred stock subscribed ..........      41,667           --            --              --        500,004           --   
 Issuance of stock purchase war-
  rants, net .........................          --           --            --              --             --           --   
 Redeemable preferred stock
  dividend............................          --           --            --              --             --           --   
 Debt to preferred stock
  conversion..........................     433,343           --            --              --      3,381,219           --   
 Accounts payable to equity
  conversion..........................      42,502           --            --              --        212,510           --   
 Net loss.............................          --           --            --              --             --           --   
                                         ---------    ---------     ---------       ---------      ---------    ---------   
Balance at December 31, 1993..........     517,512       28,026       810,029       5,133,986     $4,093,733      $30,227   
 Preferred stock subscribed ..........     130,000           --            --              --        650,000           --   
 Debt to preferred/common
  stock conversion....................       3,600      300,000            --           2,770         28,500      150,000   
 Redeemable preferred stock
  dividend............................          --           --            --              --             --           --   
 Warrants issued in connection
  with imputed and forgiven in-
  terest charges......................          --           --            --              --             --           --   
 Issuance of stock purchase war-
  rants, net..........................          --           --            --              --             --           --   
Common stock subscribed...............          --    1,750,000            --              --             --      875,000   
 Stock options exercised..............          --        4,926            --              --             --        6,104   
 Net loss.............................          --           --            --              --             --           --   
                                        ----------   ----------   -----------       ---------    -----------   ----------   
Balance at December 31, 1994..........     651,112    2,082,952       810,029       5,136,756    $ 4,772,233   $1,061,331   
 Redeemable preferred stock
  dividend ...........................          --           --            --              --             --           --   
 Debt to preferred stock
  dividend ...........................          --           --       172,414              --             --           --   
 Warrants issued in connection
  with imputed and forgiven
  interest charges ...................          --           --            --              --             --           --   
Preferred stock subscribed............      10,000           --            --              --         50,000           --   
Debt to common stock
  conversion .........................          --      100,000            --              --             --       50,000   
 Issuance of common stock
  certificates .......................          --   (2,182,952)           --       2,182,952             --   (1,111,331)  
 Issuance of Preferred Stock
  certificates .......................    (626,112)          --       626,112              --     (4,472,233)          --   
Convert Redeemable to Common..........          --           --            --         343,879             --           --   
Convert Preferred to Common...........     (35,000)          --    (1,608,555)      1,807,088       (350,000)          --   
Issuance of Common Stock,
  net of issuance cost................          --           --            --       5,313,000             --           --   
Warrants Exercised....................          --           --            --         797,917             --           --   
Net Loss..............................          --           --            --              --             --           --   
                                          --------    ---------     ---------      ----------     ----------    ---------   
Balance at December 31, 1995..........          --           --            --      15,581,592     $       --    $      --   
Net Loss (unaudited)..................          --           --            --              --             --     (671,759)  
                                         ---------    ---------     ---------      ----------     ----------    ---------  
Balance at March 31, 1996 (unaudited)           --           --            --      15,581,592     $       --    $      --   
                                         =========    =========     =========      ==========     ==========    =========   

<CAPTION> 
                                                             "C" Common stock                                                     
                                                          ---------------------                        Common
                                                         .001       Additional                         stock              Total
                                         Preferred        Par         paid-in        Accumulated    subscriptions     stockholders'
                                           stock         value        capital          deficit       receivable      equity(deficit)
                                           -----         -----        -------          -------       ----------      ---------------
<S>                                      <C>             <C>        <C>              <C>                <C>           <C>          
Balance at December 31, 1992..........   $7,200,017      $5,133     $13,842,861      $(28,869,385)      $    --       $ (7,821,374)
 Preferred stock subscribed ..........           --          --              --                --            --            500,004
 Issuance of stock purchase war-
  rants, net .........................           --          --         150,000                --            --            150,000
 Redeemable preferred stock
  dividend............................           --          --        (329,692)               --            --           (329,692)
 Debt to preferred stock
  conversion..........................           --          --              --                --            --          3,381,219
 Accounts payable to equity
  conversion..........................           --          --              --                --            --            212,510
 Net loss.............................           --          --              --        (7,702,050)           --         (7,702,050)
                                          ---------   ---------       ---------        -----------    ---------         -----------
Balance at December 31, 1993..........   $7,200,017      $5,133     $13,663,169      $(36,571,435)      $    --       $(11,579,156)
 Preferred stock subscribed ..........           --          --              --                --            --            650,000
 Debt to preferred/common
  stock conversion....................           --           3           1,382                --            --            179,885
 Redeemable preferred stock
  dividend............................           --          --        (372,552)               --            --           (372,552)
 Warrants issued in connection
  with imputed and forgiven in-
  terest charges......................           --          --         631,583                --            --            631,583
 Issuance of stock purchase war-
  rants, net..........................           --          --         112,500                --            --            112,500
Common stock subscribed...............           --          --              --                --            --            875,000
 Stock options exercised..............           --          --              --                --            --              6,104
 Net loss.............................           --          --              --        (5,133,051)           --         (5,133,051)
                                         ----------    --------     -----------      -------------    ---------       -------------
Balance at December 31, 1994..........   $7,200,017    $  5,136     $14,036,082      $(41,704,486)    $      --       $(14,629,687)
 Redeemable preferred stock
  dividend ...........................           --          --        (314,873)               --            --           (314,873)
 Debt to preferred stock
  dividend ...........................      749,383          --              --                --            --            749,383
 Warrants issued in connection
  with imputed and forgiven
  interest charges ...................           --          --         572,681                --            --            572,681
Preferred stock subscribed............           --          --              --                --            --             50,000
Debt to common stock
  conversion .........................           --          --              --                --            --             50,000
 Issuance of common stock
  certificates .......................           --       2,183       1,109,148                --            --                 --
 Issuance of Preferred Stock
  certificates .......................    4,472,233          --              --                --            --                 --
Convert Redeemable to Common..........           --         344       3,552,863                --            --          3,553,207
Convert Preferred to Common...........  (12,421,633)      1,807      12,769,826                --            --                 --
Issuance of Common Stock,
  net of issuance cost................           --       5,313      15,825,644                --            --         15,830,957
Warrants Exercised....................           --         798         398,159                --            --            398,957
Net Loss..............................           --          --              --        (1,839,840)           --         (1,839,840)
                                           --------     -------     -----------       ------------     --------         ---------- 
Balance at December 31, 1995..........    $      --     $15,581     $47,949,530      $(43,544,326)    $      --         $4,420,785
Net Loss (unaudited)..................           --          --              --          (671,759)           --           (671,759)
                                           --------     -------     -----------       ------------     --------         ---------- 
Balance at March 31, 1996 (unaudited)     $      --     $15,581     $47,949,530      $(44,216,085)    $      --         $3,749,026
                                          =========     =======     ===========      =============    =========         ==========
</TABLE>


          See accompanying notes to consolidated financial statements.

                                       F-5


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
  Consolidated Statements of Cash Flows for each of the years in the three-year
                         period ended December 31, 1995
       and the unaudited three month periods ended March 31, 1995 and 1996
                Increase (Decrease) in Cash and Cash Equivalents

<TABLE>
<CAPTION>

                                                                              December 31,               Three Months Ended March 31
                                                               -------------------------------------      --------------------------
                                                                    1993          1994          1995          1995         1996
                                                                    ----          ----          ----          ----         ----
                                                                                                                (unaudited)
<S>                                                           <C>            <C>            <C>            <C>          <C>         
Cash flows from operating activities:
 Net loss .................................................   $(7,702,050)   $(5,133,051)   $(1,839,840)   $(586,647)   $  (671,759)
 Adjustments to reconcile net loss to net
  cash used in operating activities:
  Depreciation and amortization of property
   and equipment ..........................................       256,190        115,061         54,000       13,500         11,607
  Amortization of patent rights ...........................       265,571        256,341        222,000       55,500         21,211
  Issuance of stock purchase warrants .....................       150,000        112,500           --           --             --
  Imputed interest charges ................................          --          150,000         41,360       19,315           --
  Debt conversion expense .................................     1,214,500         10,500        149,384      149,383           --
  Write-off of patent rights ..............................          --          285,190        100,017       34,781           --
  Gain on disposal of property and equipment ..............          --           17,197           --           --             --
  Changes in assets and liabilities:
   Prepaid expenses and other current assets ..............       109,069         (1,506)       (59,985)      (2,219)       (16,743)
   Accounts payable .......................................       261,402        661,732     (1,156,084)     102,991       (247,988)
   Accrued expenses .......................................       252,117      1,565,450        547,561      415,481     (1,780,346)
   Deferred revenue .......................................          --             --             --        750,000           --
   Security deposits ......................................        22,563          8,441          2,368        1,168         28,803
                                                              -----------    -----------    -----------    ---------    -----------
     Net cash (used in)
      operating activities ................................    (5,170,638)    (1,952,145)    (1,939,219)     953,253     (2,655,215)
                                                              -----------    -----------    -----------    ---------    -----------
Cash flows from investing activities:
 Purchase of property and equipment .......................          --          (40,000)        (3,625)        (855)       (31,270)
 Proceeds from disposal of property and equipment .........          --           11,000           --           --             --
 Additions to patent rights ...............................      (403,584)      (351,470)      (132,689)     (93,021)       (64,339)
     Net cash used in investing activities ................   $  (403,584)   $  (380,470)   $  (136,314)   $ (93,876)   $   (95,609)
                                                              -----------    -----------    -----------    ---------    -----------
</TABLE>

                                   (CONTINUED)

          See accompanying notes to consolidated financial statements.

                                       F-6


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
                Consolidated Statements of Cash Flows (Continued)
<TABLE>
<CAPTION>

                                                                           December 31,                 Three Months Ended March 31,
                                                           ------------------------------------------   ----------------------------
                                                                1993           1994           1995           1995           1996
                                                                ----           ----           ----           ----           ----
                                                                                                                 (unaudited)
<S>                                                        <C>            <C>            <C>             <C>            <C>       
Cash flows from financing activities:
 Proceeds from shareholder loans .......................   $ 2,540,000    $   925,910    $     35,000    $    35,000    $       --
 Proceeds from notes payable ...........................       400,000         35,000       1,762,000        782,000            --
 Payments on notes payable .............................          --          (80,000)     (1,837,000)          --       (4,920,000)
 Payments on stockholder notes .........................       (97,566)       (10,000)     (2,860,911)    (1,735,000)           --
 Principal payments under capital lease obligation .....       (95,501)        (6,923)        (23,308)          --              --
 Deferred offering costs ...............................       130,000           --              --             --              --
 Proceeds from exercise of stock options ...............        30,227           --              --             --              --
 Common stock subscription proceeds ....................          --          875,000            --             --              --
 Preferred stock subscription proceeds .................       500,004        650,000            --             --              --
 Proceeds from issuance of common stock ................          --             --        18,595,000           --              --
 Stock issuance costs ..................................          --             --        (2,764,043)          --              --
 Proceeds from exercise of stock warrants ..............          --             --           398,957           --              --
                                                           -----------    -----------    ------------    -----------    ------------
     Net cash provided by
      financing activities .............................     3,407,164      2,388,987      13,305,695       (918,000)    (4,920,000)
                                                           -----------    -----------    ------------    -----------    ------------
     Net increase (decrease) in cash and
      cash equivalents .................................    (2,167,058)        56,372      11,230,162        (58,623)    (7,670,824)
Cash and cash equivalents at beginning of period .......     2,171,691          4,633          61,005         61,005     11,291,167
                                                           -----------    -----------    ------------    -----------    ------------
Cash and cash equivalents at end of period .............   $     4,633    $    61,005    $ 11,291,167    $     2,382   $  3,620,343
                                                           ===========    ===========    ============    ===========   ============
Supplemental disclosures of cash flow information:

 Cash paid during the year for interest ................   $   459,955    $      --      $    186,503    $      --      $       --
                                                           ===========    ===========    ============    ===========    ============
Supplemental disclosure of noncash investing activities:
 Debt to equity conversion .............................   $ 2,062,434    $   100,000    $    799,383           --              --
 Accounts payable and accrued expenses to
  equity conversion ....................................       264,510         74,104          50,000           --              --
 Forgiveness of interest ...............................        52,285        458,333         572,681           --              --
 Redeemable preferred stock to equity conversion .......   $      --      $      --      $  3,238,334           --              --
</TABLE>

          See accompanying notes to consolidated financial statements.

                                       F-7


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           December 31, 1994 and 1995

(1) Business

Hemispherx BioPharma, Inc. and subsidiaries (the Company), formerly known as HEM
Pharmaceuticals   Corp.,  is  a   pharmaceutical   company  using  nucleic  acid
technologies to develop therapeutic products for the treatment of viral diseases
and certain  cancers.  The Company's drug technology  uses  specially-configured
ribonucleic  acid  (RNA).  The  Company's   double-stranded  RNA  drug  product,
trademarked  Ampligen,  is in human clinical development for various therapeutic
indications.  The efficacy and safety of Ampligen is being developed  clinically
for three  anti-viral  indications:  myalgic  encephalomyelitis,  also  known as
chronic fatigue  syndrome  (ME/CFS) (Phase II clinical trial completed and Phase
II/III  clinical trial  authorized);  human  immunodeficiency  virus  associated
disorders  (Phase II clinical  trial);  and chronic  hepatitis B virus infection
(Phase I/II clinical trial in process). The Company also has clinical experience
with Ampligen in patients with certain  cancers  including  renal cell carcinoma
(kidney cancer) and metastatic malignant melanoma.

The  consolidated  financial  statements  include the  financial  statements  of
Hemispherx BioPharma, Inc. and its three wholly-owned subsidiaries BioPro Corp.,
BioAegean Corp. and Core BioTech Corp. which were incorporated in September 1994
for the  purpose  of  developing  technology  for  ultimate  sale  into  certain
non-pharmaceutical  specialty  consumer  markets.  All significant  intercompany
balances and transactions have been eliminated in consolidation.

The company plans to continue to finance its  operations  with a combination  of
product sales, stock issuances and strategic alliances.  The Company may need to
obtain further financing for the long-term  development and commercialization of
its  planned  products in order to realize  the  commercial  value of its patent
portfolios.

In November,  1995, the Company  completed an initial  public  offering (IPO) of
5,313,000  units of  Hemispherx  BioPharma,  Inc.  resulting  in net proceeds of
approximately  $15.8  million.  Each unit consists of one share of the Company's
Common Stock and one Class A Redeemable  Warrant,  exercisable  for one share of
Common Stock at $4.00 per share.  These Class A Redeemable  Warrants are subject
to  redemption  two years from November 2, 1995 at $.05 per warrant in the event
that the closing bid price of the  Company's  Common Stock  exceeds  $9.00 for a
specified time period.  In connection  with the IPO, the underwriter was granted
an option to purchase 462,000 units at $5.775 per unit.

(2) Summary of Significant Accounting Policies

  (a) Cash and Cash Equivalents

Cash  equivalents  consist of money market,  bank  certificates of deposit,  and
overnight repurchase  agreements  collateralized by money market securities with
original maturities of less than three months.

  (b) Property and Equipment

Property  and  equipment  consist  of  furniture,  fixtures,  office  equipment,
leasehold   improvements  and  vehicles  recorded  at  cost.   Depreciation  and
amortization  is computed  using the  straight-line  method  over the  estimated
useful lives of the respective assets, ranging from five to seven years.

Property  and  equipment   held  under  capital  leases  are  amortized  on  the
straight-line  method over the shorter of the lease term or the estimated useful
life of the asset.

Accumulated  depreciation  and  amortization as of December 31, 1994 and 1995 is
$587,688 and $545,956,  respectively.  Accumulated depreciation and amortization
as of March 31, 1996 is $557,564.

  (c) Patent and Trademark Rights

Patents  and  trademarks  are  stated  at cost  (primarily  legal  fees) and are
amortized using the straight-line method over ten years. The Company reviews its
patents and trademarks  periodically  to determine  whether they have continuing
value.  Such review includes an analysis of the patent and trademark's  ultimate
revenue  and  profitability  potential  on an  undiscounted  cash flow  basis to
support the  realizability  of its  respective  capitalized  cost.  In addition,
management's  review addresses whether the patent and trademark continues to fit
into the Company's strategic business plans. During the years ended December 31,
1994 and 1995, the Company decided not to renew patents in certain countries and
has  recorded  $285,190 and  $100,017  respectively,  relating to the expense of
writing off these patents as a charge to research and  development.  Accumulated
amortization  as of  December  31,  1994  and  1995 is  $877,990  and  $936,407,
respectively. Accumulated amortization as of March 31, 1996 is $809,000.

  (d) License Fee Revenue

Revenue is recognized  immediately for nonrefundable license fees when agreement
terms require no additional performance on the part of the Company.

                                       F-8
<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

  (e) Proforma and Supplemental Proforma Net Loss Per Share

Upon the  closing  of the IPO of common  stock,  all shares of Series A, B and C
Preferred Stock (Preferred Stock) converted into Common Stock. Proforma net loss
per share  for the  years  end  December  31,  1994 and 1995 are  calculated  by
dividing net loss by the weighted  average  number of common shares  outstanding
during the period after giving effect for Common Stock equivalents  arising from
stock  options and  warrants and  Preferred  Stock  assumed  converted to Common
Stock.  Pursuant to the requirements of the Securities and Exchange  Commission,
Common  Stock and Common  Stock  equivalents  issued by the  Company  during the
twelve  months  immediately   preceding  the  IPO  have  been  included  in  the
calculation  of the  shares  used in the  calculation  of pro forma net loss per
share (using the treasury stock method and the public offering price).

  (f) Sales of Subsidiary Stock

The  Company  intends to  account  for any sales of its  subsidiaries'  stock as
capital transactions.

  (g) New Accounting Pronouncements

In March, 1995, the Financial Accounting Standards Board (FASB) issued Statement
of Financial  Accounting  Standards No. 121  "Accounting  for the  Impairment of
Long-Lived  Assets and for Long-Lived Assets to be Disposed Of" (Statement 121).
Statement 121 provides guidance for recognition and measurement of impairment of
long-lived assets, certain identifiable intangibles and goodwill related both to
assets to be held and used and assets to be disposed of. The Company is required
to adopt Statement 121 for the year ended December 31, 1996. The Company has not
yet quantified the impact,  if any, of the adoption of Statement 121 may have on
its consolidated financial statements.

In October 1995, the FASB issued  Statement  123,  "Accounting  for  Stock-Based
Compensation"  (Statement  123).  Statement  123 allows  companies the option to
retain the current accounting method for recognizing  stock-based expense in the
financial  statements or to adopt a new accounting method based on the estimated
fair value of employee stock  options.  Companies that do not adopt the new fair
value  based  method will be required  to provide  expanded  disclosures  in the
footnotes.  The Company is required  to adopt  Statement  123 for the year ended
December  31,  1996.  The  Company  expects to  continue  applying  its  current
accounting   method  and  upon  adoption  will  present  the  required  footnote
disclosures.

  (h) Use of estimates

The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial  statements and accompanying notes.
Actual results could differ from those estimates.

  (i) Interim Financial Information (Unaudited)

The unaudited interim condensed  consolidated financial statements for the three
month periods ended March 31, 1995 and 1996 have been prepared on the same basis
as the Company's  audited  consolidated  financial  statements as of and for the
year ended December 31, 1995. In the opinion of the management, all adjustments,
consisting  of normal  recurring  accruals,  necessary  to  present  fairly  the
financial  position  of the  Company  at  March  31,  1995  and the  results  of
operations  and cash flows for the three month  periods ended March 31, 1995 and
1996.  The results of operations for the three month period ended March 31, 1996
are not  necessarily  indicative  of the  results  expected  for the year ending
December 31, 1996.

                                      F-9

<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

(3) Notes Payable

Notes  payable  at  December  31,  1994 and 1995 and  unaudited  March 31,  1996
consisted of the following:
<TABLE>
<CAPTION>

                                                             December 31,         March 31,
                                                       -----------------------   -----------
                                                           1994        1995          1996
                                                           ----        ----          ----
                                                                                 (unaudited)
<S>                                                    <C>          <C>          <C>
February 1992 convertible  note with detachable
 warrants due February 26, 1995, interest payable                
 quarterly at 12% per annum, as amended (Note 14)      $4,920,000   $4,920,000           --
 
June 1993 convertible note with detachable warrants
 due February 28, 1995, interest after September 30,
 1993 payable in Common Stock at $10.85 per share,
 as amended
                                                          100,000         --             --
June 1994 note, payable with 12% interest per
 annum upon completion of financing in excess
 of $3 million                                             25,000         --             --
                                                       ----------   ----------   ------------
                                                       $5,045,000   $4,920,000   $          0
                                                       ==========   ==========   ============
</TABLE>

                                      F-10


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

(4) Stockholder Notes

Stockholder notes at December 31, 1994 consisted of the following:

                                                                   December 31,
                                                                       1994
                                                                   ------------
December  1992 and  February  1993  convertible  notes  
  issued  with  detachable warrants due April 1994, with
  interest at 12% per annum, as amended in 1995...................  $2,400,000

March 1993 note due upon demand, interest payable
  quarterly at 12% per annum......................................     100,000

July 1993 note issued with detachable warrants due at
  option of holder upon completion of future financings,
   with interest at 12% annum, as amended.........................     100,000

December 1994 notes...............................................     750,000

May 1994 note due on demand with interest at 12%
  per annum collateralized by certain patents.....................      75,910
                                                                    ----------
                                                                    $3,425,910
                                                                    ==========

     The Company  had been in default  and amended the terms of the  stockholder
     notes prior to the  completion of its IPO. Upon  completion of the IPO, all
     stockholders  notes  and  accrued  interest  were  paid  in full  from  the
     proceeds.


(5) Accrued Expenses

Accrued  expenses at December  31,  1994 and 1995 and  unaudited  March 31, 1996
consists of the following:

<TABLE>
<CAPTION>

                                                          December 31,                   March 31,
                                              -------------------------------          -----------
                                                1994                  1995                 1996
                                                ----                  ----                 ----
                                                                                       (Unaudited)
<S>                                           <C>                 <C>                  <C>     
Accrued research and development fees........ $   413,940         $       --           $      -
Deferred rent................................     285,309              228,189               2,403
Deferred and Accrued payroll and benefits....     470,951              144,047             231,257
Accrued interest.............................     831,995              898,733                -
Accrued professional fees....................     186,950              727,996             135,524
Accrued taxes and other......................     107,710              264,131             113,566
                                               ----------           ----------             -------
                                               $2,296,855           $2,263,096            $482,750
                                               ==========           ==========            ========

</TABLE>

(6) Stockholders' Equity(Deficit)

  (a) Common Stock

The Company is authorized to issue  50,000,000  shares of $.001 par value Common
Stock. On May 9, 1994, the Company declared a 1:2.17015  reverse stock split and
change in par value to $.001 on shares of the Company's  Common Stock  effective
June 29,  1994.  Effective  November  30,  1994 and June 5,  1995,  the  Company
effected a 2:1 forward stock split and changed its name to Hemispherx BioPharma,
Inc., respectively.  The accompanying  consolidated financial statements reflect
for all periods  presented the effect of the 1:2.17015  reverse stock split, 2:1
forward stock split, and a change in par value to $.001 per common share.

  (b) Common Stock Options and Warrants

(i) Stock Options

     (A) At December 31, 1994 and 1995, the Company had  outstanding  options to
     purchase 556 shares of Common Stock  exercisable  at any time in the future
     at $1.07 to $2.17 per share,  for options granted prior to 1990. The option
     price  represents the fair market value of each underlying  share of Common
     Stock  at the  date of  grant,  as  determined  by the  Company's  board of
     directors.

     (B) The 1990  Stock  Option  Plan  provides  for the  grant of  options  to
     purchase up to 460,798  shares of the Company's  Common Stock to employees,
     directors,  and officers of the Company and to consultants,  advisers,  and
     other  persons  whose  contributions  are  important  to the success of the
     Company.  The  recipients  of options  granted  under the 1990 Stock Option
     Plan,  the number of shares to be covered by each option,  and the exercise
     price, vesting terms, if any, duration and other terms of each option shall
     be determined  by the Company's  board of directors or, if delegated by the
     board,  its Compensation  Committee.  No option is exercisable more than 10
     years  and  one month  from the  date  as of which  an  option agreement is

                                      F-11


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

     executed.  These shares become vested through various periods not to exceed
     four years from the date of grant.  Certain  shares  became vested upon the
     underwritten public offering concluded by the Company in November 1995. The
     option price  represents the fair market value of each underlying  share of
     Common Stock at the date of grant,  as determined by the Company's board of
     directors.

Information  regarding the options  approved by the Board of Directors under the
1990 Stock Option Plan is summarized below:

                                                    December 31        March 31,
                                                ------------------   -----------
                                                                     (Unaudited)
                                    Option
                                     Price       1994         1995         1996
                                 ---------       ----         ----         ----

Outstanding, beginning of year   $ .11-4.34     331,486     285,620     232,830
Granted ......................    3.50-4.34      49,952           0           0
Exercised ....................    1.07-3.80      (4,926)          0           0
Canceled .....................     .11-4.34     (90,892)    (52,790)     (4,328)
                                -----------    --------    --------    --------
Outstanding, end of year .....   $1.07-4.34     285,620     232,830     228,502
                                ===========    ========    ========    ========
Exercisable ..................                  107,000     165,244     174,489
                                               ========    ========    ========
Available for future grants ..                  175,178     227,968     232,296
                                               ========    ========    ========

The  outstanding  options  include  the right to purchase  45,344  shares of the
Company's Common Stock at $3.50 per share.

In December  1992,  the Board of  Directors  approved the 1992 Stock Option Plan
(the 1992 Stock Option Plan) which provides for the grant of options to purchase
up to 92,160 shares of the Company's Common Stock to employees,  directors,  and
officers of the Company and to  consultants,  advisers,  and other persons whose
contribution are important to the success of the Company.  The recipients of the
options  granted  under the 1992 Stock Option  Plan,  the number of shares to be
covered by each option, and the exercise price,  vesting terms, if any, duration
and other terms of each option shall be  determined  by the  Company's  board of
directors.  No option is  exercisable  more than 10 years and one month from the
date as of which an option agreement is executed.  To date, no options have been
granted under the 1992 Stock Option Plan.

A general  outline of the Company's  1993 Employee Stock Purchase Plan (the 1993
Purchase  Plan) was approved by the board of directors in July 1993. The outline
of the 1993 Purchase Plan provides for the issuance,  subject to adjustment  for
capital changes, of an aggregate of 138,240 shares of Common Stock to employees.
The 1993 Purchase Plan will be administered by the Compensation Committee of the
board of directors.  Under the 1993 Purchase  Plan,  Company  employees  will be
eligible  to  participate  in  semi-annual   plan  offerings  in  which  payroll
deductions  may be used to purchase  shares of Common Stock.  The purchase price
for such shares  will be equal to the lower of 85% of the fair  market  value of
such shares on the date of grant or 85% of its fair market  value of such shares
on the date such right is exercised. There have been no offerings under the 1993
Purchase Plan to date and no shares of Common Stock have been issued thereunder.

                                      F-12


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

  (ii) Warrants

The warrants  outstanding at December 31, 1995, related to the issuance of notes
payable and shareholder  notes payable (notes 3 and 4) which were exercisable in
either Common Stock, Series B or Series C Preferred Stock and subject to certain
antidilution  adjustments.  Upon  completion of the IPO, these  warrants  became
exercisable only in Common Stock.

                                                Common Stock
                                         -----------------------
                                         Exercise      Number of
                                          Price         Shares        Expiration
                                          -----         ------        ----------
Notes payable:
                                                                        5 years
 February 1992                                                             from
  convertible note (see Note 14)....      $2.00         420,000        IPO date
Stockholders:
 Stockholders.......................      $3.50         292,160      Sept. 1997
 Stockholder........................      $3.50         300,000       Oct. 1999
 Stockholders.......................      $3.50          72,697       Dec. 1997
 Stockholder........................       2.72           4,608        May 1996
 Stockholders.......................       2.00         144,000       Dec. 1997
 Stockholder........................       1.75          75,000       Mar. 2000
 Stockholders.......................       1.75       2,750,000       June 2005
 Stockholders.......................       3.50       2,080,000      Sept. 1999
                                                      ---------
                 Subtotal:                            6,138,465
                                                      =========
(iii) Other Warrants

In  addition,  the Company has issued  other  warrants  outstanding  - totalling
7,535,847 which consists of the following:

From February  through April 1995, the Company  executed  Bridge Loan Agreements
and promissory notes with 17 accredited lenders totaling $1,500,000. These notes
required  interest at 8% per annum and were paid on the closing date of the IPO.
Interest  has been  imputed at 12% and is  recognized  as  interest  expense and
additional  paid in  capital  in 1995 to  reflect  the  issuance  of  additional
warrants to reflect the  reduction in interest.  Such  agreements  also included
various affirmative and negative  covenants.  As additional  consideration,  the
lenders  have  options to purchase  1,000,000  bridge  units  issuable  upon the
effective  date of the IPO at an  exercise  price of $.50  for a period  of five
years.  Management believes these sales are a good measure of fair value because
they  represent the only notable  third-party  sales of Common Stock in 1994 and
1995,  prior to the IPO. Such  exercise  price is estimated to be at fair market
value  at  the  date  of  issuance  based  on  recent  sales  of  securities  to
third-parties.  Each bridge unit  consists of one share of Common  Stock and one
Class A Redeemable Common Stock Purchase Warrant exercisable at $4.00 per share.
797,917 units were exercised in 1995 at $.50 per Warrant.

In June 1995, the Company entered into an agreement with The Sage Group whereby,
in return for identifying  certain  distribution  partners,  The Sage Group will
receive  certain  percentages  of  the  proceeds  from  the  first  distribution
agreement arising from such identification. In addition, the Company will pay to
The Sage Group a monthly  retainer  and warrants to purchase  100,000  shares of
Common Stock at an exercise price of $1.75 share.

In  connection  with the IPO  completed  on November 7, 1995,  the Company  sold
5,313,000 units.  Each unit consisted of one share of common stock and one Class
A Redeemable Warrant exercisable at $4.00 per share.

Also, as part of the underwriting  agreement,  the underwriter received warrants
to  purchase  462,000  shares  of common  stock at  $5.775  per share as well as
462,000 Class A Redeemable Warrants to purchase common stock at $6.60 per share.
These warrants expire five years from the date of the IPO.

  (iv) Subsidiary Warrants

In May 1995,  the officers and  directors  of BioAegean  Corp.  were elected and
approved.  The board of directors  approved the issuance of 6,000,000  shares of
Common Stock,  of which  1,000,000  shares are to be offered for sale to certain
investors at $1.00 per share. In addition,  the directors  approved  options for
directors and officers totaling  1,200,000 shares at an exercise price of $1.00.
In consideration for licensing certain patents,  the board authorized  1,000,000
shares of common stock to be issued to Hemispherx  BioPharma,  Inc., options for
an  additional  1,000,000  shares of common  stock at the lesser of the  initial
public  offering price of BioAgean Corp. or $5.00 per share and 10,000 shares of
Preferred stock to Hemispherx BioPharma, Inc.

                                      F-13


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

The  Company  has  granted  certain  rights  to the  debtholders  to have  their
securities  registered  under the Act. The Company  believes the warrants have a
value  which is not  material  for  purposes  of the  financial  statements  and
accordingly,  no value has been attributed to these warrants in the accompanying
consolidated financial statements.

(7) Preferred Stock

The Company is authorized to issue 5,000,000  shares of $.01 par value Preferred
Stock.

The Company had the following  Preferred  Stock shares issued,  outstanding  and
subscribed  at December 31, 1994.  All  preferred  stock was converted to Common
Stock in 1995 in connection with the IPO.
<TABLE>
<CAPTION>

                                                                 December 31, 1994
                                           ---------------------------------------------------------------
                                            Number of        Number                              Stated
                                            shares         of shares          Stated            par value
                                           subscribed        issued           par value         subscribed
                                           ----------        ------           ---------         ----------
<S>                                          <C>             <C>             <C>                <C>   
Series A1 Redeemable Preferred Stock.....        --          370,370         $1,999,998
Series A2 Preferred Stock................        --          487,805          4,000,001
Series B Preferred Stock.................        --          222,224          2,000,016
Series C Preferred Stock.................    651,112         100,000          1,200,000          4,772,233
</TABLE>


The preferred shares accrued a compounded  annual  cumulative  dividend of $.702
per  share on Series A 1,  $1.23  per  share on  Series A 2,  $1.35 per share on
Series B and $1.80 per share on Series C. As of  December  31,  1994,  preferred
dividends  in arrears  amounted to  approximately  $2,941,000,  $1,100,000,  and
$1,004,000  on  outstanding  shares  of the  Series A 2,  Series B and  Series C
Preferred  Stock,  respectively.  Cumulative  dividends on Series A1  Redeemable
Preferred Stock have been reflected as an addition to Redeemable Preferred Stock
and as a charge to additional paid-in capital.

(8) Research, Consulting and Supply Agreements

The  Company has entered  into  various  clinical  research  agreements  for the
purpose of  undertaking  clinical  evaluations  of the safety  and  efficacy  of
Ampligen. The Company's obligation under these agreements is primarily dependent
on the number of actual  patients  enrolled in the study.  During 1993, 1994 and
1995,  the  Company  incurred  approximately  $325,000,  $247,000  and  $179,000
respectively, of research fees under these agreements.

The Company has entered into a pharmaceutical  use license agreement with Temple
University (the Temple Agreement) pursuant to which Temple granted the Company a
world-wide  license for the term of the  agreement  for the  commercial  sale of
Oragen products using patents and related  technology held by Temple.  Under the
agreement the Company agreed,  among other things,  to pay royalties  between 2%
and 4% of net sales,  with a minimum of $30,000 per year  commencing in 1995. In
May and June 1994, Temple University gave notice of certain purported violations
of certain  reporting  requirements  contained in its Temple  Agreement with the
Company and nonpayment of certain invoices in the approximate  amount of $1,500.
In July  1994,  Temple  notified  the  Company  that it  considered  the  Temple
Agreement terminated (note 14).

The  Company has entered  into  agreements  for  consulting  services  which are
performed at certain  institutions  and by certain  individuals.  The  Company's
obligation  to fund these  agreements  can  generally  be  terminated  after the
initial funding period,  which generally ranges from one to three years or on an
as-needed  monthly  basis.  During  1993,  1994 and 1995,  the Company  incurred
approximately $243,000, $130,000 and $87,000,  respectively,  of consulting fees
under these agreements.

In 1987,  the Company  entered into an agreement  (the  "Supply  Agreement")  to
purchase $2.7 million of compounds  used in the  manufacture  of Ampligen  which
expired in December  1992.  Pursuant to the terms of the Supply  Agreement,  the
Company agreed to pay royalties of .5% of net sales,  subject to certain minimum
and maximum  requirements,  for 5 years to the supplier of raw materials for the
manufacture of Ampligen.

In September 1995, the Company entered into an agreement with Rivex Pharma Inc.,
("Rivex"),  pursuant to which Rivex will provide various  services in connection
with the  marketing  and  exclusive  distribution  of  Ampligen  in Canada on an
emergency drug release  basis.  Under the terms of this  agreement,  the Company
will supply and Rivex will  purchase as much  Ampligen as  necessary  to satisfy
Rivex's  customers at a mutually agreed upon cost. In return,  Rivex will retain
the exclusive right to market and distribute Ampligen in Canada.

                                      F-14

<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

(9) 401(K) Plan

In December 1995, the Company established a defined contribution plan, effective
January  1, 1995,  the  Hemispherx  BioPharma  Employees  401(K)  Plan and Trust
Agreement (the 401(K) Plan). All full time employees of the Company are eligible
to participate  in the 401(K) Plan following one year of employment.  Subject to
certain  limitations  imposed by federal tax laws,  participants are eligible to
contribute up to 15% of their salary (including bonuses and/or  commissions) per
annum.  Participants'  contributions  to the  401(K)  Plan may be matched by the
Company  at  a  rate  determined  annually  by  the  Board  of  Directors.  Each
participant immediately vests in his or her deferred salary contributions, while
Company  contributions  will vest over one year.  In 1995 the  Company  provided
matching  contributions  to each employee for up to 6% of annual pay or $25,500.
The Company also absorbed the cost of employee contributions of $25,500.

(10) Vendor Agreements

The Company and a law firm entered  into a  stand-still  agreement.  The Company
provided  for an  aggregate  payment of $85,000  before  November  18,  1994 and
monthly payments beginning February 1, 1995 in the amount of $15,000, subject to
escalation, until all obligations are paid in full. In addition, the stand-still
agreement provides for additional  payments upon any financings and repayment in
full from the proceeds of an IPO. The  outstanding  balance at December 31, 1994
of approximately $484,000 was paid in 1995.

On February  20, 1996 the Company  entered  into an agreement to amend the lease
for its  principal  office.  For a payment of $85,000 all  outstanding  rent and
charges  accrued  through  December 31, 1995 were forgiven by the landlord.  The
term of the lease was  extended  through  April 30, 2000 with an average rent of
$14,507 per month, plus applicable taxes and charges. Note 12, leases,  reflects
these new terms.

(11) Royalties, License, and Employment Agreements

The  Company  also  has  entered  into a  licensing  agreement  with a group  of
individuals  and Hahnemann  University  relating to their  contributions  to the
development of certain compounds,  including  Ampligen,  and to obtain exclusive
information  and  regulatory  rights  relating  to these  compounds.  Under this
agreement,  the Company  will pay 2% of net sales  proceeds  of Ampligen  not to
exceed an aggregate amount of $6 million per year through 2005.

As described in note 8, the Company has agreed to pay royalties under the Temple
Agreement and to its supplier of raw materials.

The Company has employment  agreements with four of its officers.  The aggregate
annual  base  compensation  under the  employment  agreements  is  $576,000  and
$540,000  respectively.  In addition,  certain of these officers are entitled to
receive  performance bonuses of up to 25% of the annual base salary (in addition
to the bonuses described below). Pursuant to the employment agreements,  certain
officers  were granted  options  under the 1990 Stock Option Plan to purchase an
aggregate of 82,942  shares of the  Company's  Common  Stock at exercise  prices
ranging from  $2.72-$4.34 and Rule 701 Warrants to purchase  2,000,000 shares of
Common Stock at $3.50 per share. One of the employment  agreements  provides for
bonuses based on gross  proceeds  received by the Company from any joint venture
or corporate partnering agreement.

The Company has a  non-exclusive  license  (the  "Hopkins  License")  with Johns
Hopkins University ("Hopkins") in the U.S., Canada and France related to nucleic
acid complexes.  Pursuant to the Hopkins Agreement,  the Company is obligated to
pay a royalty ranging from 3% to 6% of net commercial sales for products sold by
the Company with certain minimum annual royalties.

                                      F-15


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

In October 1994, the Company  entered into a licensing  agreement with Bioclones
(Propriety) Limited (SAB/Bioclones) with respect to codevelopment of various RNA
drugs,  including Ampligen,  for a period ending three years from the expiration
of the last licensed patents.  The licensing  agreement  provides  SAB/Bioclones
with an  exclusive  manufacturing  and  marketing  license for certain  southern
hemisphere countries  (including certain countries in South America,  Africa and
Australia) as well as the United  Kingdom and Ireland (the licensed  territory).
In  exchange  for  these  marketing  and  manufacturing  rights,  the  licensing
agreement  provides  for: (a) a $3 million  cash payment to the Company,  all of
which has been received as of December 31, 1995;  (b) the formation and issuance
to the Company of 24.9% of the capital  stock of a company  which shall  develop
and operate a new manufacturing facility by SAB/Bioclones,  and (c) royalties of
6% to 8% of net sales of the licensed  products in the licensed  territories  as
defined,  after the first $50 million of sales.  SAB/Bioclones will be granted a
right of first  refusal  to  manufacture  and  supply  to the  Company  licensed
products  for not less  than  one-third  of its  world-wide  sales of  Ampligen,
excluding SAB/Bioclones-related sales. In addition,  SAB/Bioclones will have the
right of first refusal for oral vaccines in the licensed territory.

In October  1994,  the Board of Directors  granted a director of the Company the
right to receive 3% of gross  proceeds  of any  licensing  fees  received by the
Company pursuant to the SAB licensing agreement, a fee of .75% of gross proceeds
in the event that SAB makes a tender offer for all or  substantially  all of the
Company's assets, including a merger, acquisition or related transaction,  and a
fee of 1% on all  products  manufactured  by SAB. The Company may prepay in full
its obligation to provide commissions up to $1,050,000 within a ten year period.

In July 1995, the Company  entered into an agreement  with the Vernacular  Group
whereby,  in return for identifying  certain  corporate  partners for the BioPro
subsidiary, the Vernacular Group would receive from the Company a minority stock
position in the  subsidiary and a percentage of all licensing fees and royalties
received in connection therewith.

On December 5, 1995, the Company retained the law firm of Akin,  Gump,  Strauss,
Hauer & Feld, L.L.P.  (Akin, Gump) to provide general legal counsel,  advise and
representation  with  respect  to various  United  States  regulatory  agencies.
Initially,  Akin,  Gump will  provide  representation  before  the Food and Drug
Administration  (FDA). In addition,  the agreement allows for incentive payments
for obtaining a letter from the FDA evidencing Ampligen's  approvability for HIV
disease treatment.  If such approval is obtained by March 15, 1996 the incentive
payment is  $1,000,000.  If obtained by June 15, 1996 the  incentive  payment is
$750,000.

(12) Leases

The Company has several  noncancelable  operating  leases for the space in which
its  principal  offices are located and certain  office  equipment.  See note 10
above.

Future  minimum  lease  payments  under  noncancelable  operating  leases are as
follows:

Year ending                                                   Operating
December 31,                                                   leases
- ------------                                                 ----------
1996...................................................      $  263,246
1997...................................................         271,791
1998...................................................         280,411
1999...................................................         292,144
2000...................................................          91,516
                                                             ----------
   Total minimum lease payments........................      $1,199,108
                                                             ==========
                                                       
                                      F-16


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

Rent expense  charged to operations for the years ended December 31, 1993,  1994
and 1995 amounted to approximately $223,000, $173,000 and $289,000 respectively.
The Company  recognizes  rent  expense on a  straight-line  basis over the lease
term, and the difference  between rent expense on a straight-line  basis and the
base rental is deferred  and  included in accrued  expenses at December 31, 1994
and 1995 (note 5).

(13) Income Taxes

At December 31, 1995, the Company had available net operating loss carryforwards
of  approximately  $39,300,000  million for  Federal and state  income tax which
expire over various years through 2010. The difference between the net operating
losses  for  tax  and  financial   statement  purposes  relates  principally  to
amortization  of  patents  and  related  costs,   inventory  usage,  and  leases
capitalized for financial  statements  purposes,  which are operating leases for
tax purposes.  In addition,  for Federal  income tax  purposes,  the Company has
approximately  $9,000 of unused  investment  and job tax  credits  available  to
offset future taxes, if any, expiring 1996 through 1999.

The expiration dates of the net operating loss carryforwards are as follows:

Expiration   Tax loss
               date                                               carryforwards
               ----                                               -------------
               1999..............................................  $   130,974
               2003...............................................   1,773,967
               2004...............................................   5,402,521
               2005...............................................   3,534,484
               2006...............................................   8,654,551
               Thereafter.........................................  19,821,428
                                                                   -----------
                                                                   $39,317,925
                                                                   ===========

If certain  substantial  changes in  ownership  should  occur  there would be an
annual  limitation  on the amount of tax  attribute  carryforwards  which can be
utilized in the future.

The Company has provided a valuation  allowance  for it's deferred tax assets in
an amount equal to it's net operating loss carry-forwards.

(14) Contingencies

The Company was a defendant in a lawsuit instituted in 1991 by participants in a
double-blind  placebo-controlled  clinical trial of Ampligen therapy for ME/CFS.
The plaintiffs alleged that the Company or its alleged agents promised them that
they would receive  Ampligen after the  placebo-controlled  study at no cost for
periods  ranging  from  "until  marketable"  to "for  life."  Plaintiffs  sought
compensatory and punitive  damages.  The court granted the Company's motions for
summary  judgment upon all claims  alleged by the  plaintiffs in this case.  The
plaintiffs  have  appealed  from these orders  before the United States Court of
Appeals for the Ninth  Circuit.  In January  1996,  the Court of Appeals  denied
their appeal and sustained the Company's position.  On the basis of the Court of
Appeals  favorable  decision,  the Company  believes the lawsuit is over with no
material effect on the Company.

                                      F-17


<PAGE>

                   HEMISPHERx BIOPHARMA, INC. AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(Continued)
                           December 31, 1994 and 1995

In  February  1991,  a  university  advised  the  Company of its  position  that
employees  of the  university  were  the  inventors  of an  issued  U.S.  patent
regarding  the  use  of  Ampligen  in  combination  with  various  other  agents
(including AZT) for the treatment of HIV infection. As issued, this patent names
the Company's Chief  Executive  Officer as sole inventor and the Company as sole
assignee.  The  university  has demanded that the patent be reissued  naming the
university's  employees as inventors and the university as assignee. The Company
has  refused  to take  such  action.  No  formal  claim  has  been  filed by the
university. If such claim were filed and if such claim were found to have merit,
the loss of the patent at issue would not have a  materially  adverse  effect on
the Company's  long-range  business since the  university  would only be able to
limit and/or prevent the Company's use of Ampligen in  combinations  with AZT in
the treatment of HIV.

In November 1994, the Company filed suit against Temple University ("Temple") in
the  Superior  Court of the  State of  Delaware  ("Superior  Court")  seeking  a
declaratory  judgment that the Temple  Agreement  (note 8) remains in full force
and effect and seeking  monetary  damages in excess of $10 million for  Temple's
alleged  breach of its  obligations  of good faith and fair  dealing and certain
terms of the Temple Agreement. Temple has filed a motion to dismiss this lawsuit
upon the grounds of lack of personal jurisdiction. In January 1995, Temple filed
separate  litigation  against  the  Company  in the  Court  of  Common  Pleas of
Philadelphia County seeking  declaratory  judgment that the Temple Agreement has
been  lawfully  terminated  as of July 1, 1994,  together with an award of costs
including  attorney fees, in bringing the action.  The Court of Common Pleas has
stayed  further  proceedings  in that  litigation  pending  the  outcome  of the
Company's  Superior Court case. If the Company were to lose its claim,  the loss
of the licensing agreement could have a material adverse effect on the Company's
future business as Temple or its new licensees, if any, could become competitors
of the Company.

In March 1995, the Company instituted a declaratory  judgment action against the
February 1992 noteholder of a $5 million convertible note and a second defendant
in the United  State  District  Court for the Eastern  District of  Pennsylvania
("the  Pennsylvania  action")  to  declare as void,  set  aside,  and cancel the
February  1992  convertible  note between the Company and the  noteholder  ("the
Note"). In addition,  the noteholder  instituted suit against the Company on the
Note in the Circuit  Court of the 15th  Judicial  District in and for Palm Beach
County,  Florida,  seeking  judgment on the note, plus attorneys fees, costs and
expenses;  in August 1995,  this action was stayed by the Florida  Court pending
the outcome of the Pennsylvania action. The noteholder also filed a motion for a
preliminary  injunction  in the  Pennsylvania  court to enjoin the Company  from
disbursing  the  proceeds of a public  offering  in the amount of $5.8  million,
which motion was granted in November,  1995.  On February 15, 1996,  the Company
reached  an  agreement  to  settle  this  matter.  Terms and  conditions  of the
settlement  include  payment of $6,450,000  to the  noteholder to cover the note
balance and legal  expenses.  The noteholder and related parties are to maintain
certain Warrants that were granted prior to the lawsuit.  Other Warrants granted
to the noteholder in the note restructuring in 1994 were relinquished. The funds
under this settlement were paid on March 21, 1996. Mutual releases were executed
which completed the settlement of the litigation.

The Company is subject to claims and legal  actions  that arise in the  ordinary
course of their business.  Management believes that the ultimate  liability,  if
any,  with  respect to these  claims and legal  actions will not have a material
effect on the financial position or results of operations of the Company.

(15) Subsequent Events (Unaudited)

In July 1996, the Company  consummated a private offering of its preferred stock
pursuant  to  Rule  506 of  regulation  as  promulgated  by the  SEC  under  the
Securities  Act of 1933 as amended.  The Company issued 6,000 shares of Series D
Preferred  Stock,  $.01 par  value at a  purchase  price of  $1,000  per  share.

                                      F-18


<PAGE>

================================================================================

No  dealer,  salesman  or any  other  person  has  been  authorized  to give any
information or to make any  representations  other than those  contained in this
Prospectus in connection with the offer made by this Prospectus and, if given or
made, such information or representations must not be relied upon as having been
authorized  by the Company or the  Representative.  Neither the delivery of this
Prospectus nor any sale made hereunder shall under any circumstances  create any
implication  that there has been no change in the affairs of the  Company  since
the date hereof. This Prospectus does not constitute an offer or solicitation by
anyone in any jurisdiction in which such offer or solicitation is not authorized
or in which the person making such offer or  solicitation is not qualified to do
so or to anyone to whom it is unlawful to make such offer or solicitation.

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

Additional Information....................................................
Prospectus Summary........................................................
Risk Factors..............................................................
Dividend Policy...........................................................
Selected Financial Data...................................................
Management's Discussion and Analysis of
 Financial Condition......................................................
Business..................................................................
Government Regulation.....................................................
Management................................................................
Principal Shareholders....................................................
Resales by Selling Security Holders.......................................
Certain Transactions......................................................
Description of Securities.................................................
Shares Eligible for Future Sale...........................................
Underwriting..............................................................
Legal Matters.............................................................
Experts...................................................................
Financial Statements......................................................

                              --------------------

Until _______,  1996  all  dealers  effecting  transactions  in  the  registered
securities,  whether or not participating in this distribution,  may be required
to  deliver a  Prospectus.  This  delivery  requirement  is in  addition  to the
obligation of dealers to deliver a Prospectus  when acting as  underwriters  and
with respect to their unsold allotments or subscriptions.

================================================================================



================================================================================



                           HEMISPHERx BIOPHARMA, INC.




                          2,770 SHARES OF COMMON STOCK
                        2,427,275 SHARES OF COMMON STOCK
                                   UNDERLYING
                            SERIES D PREFERRED STOCK
                         890,543 SHARES OF COMMON STOCK
                             UNDERLYING COMMON STOCK
                                PURCHASE WARRANTS





                                 ---------------
                                   PROSPECTUS
                                 ---------------







                                  July __, 1996



================================================================================

<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

         SEC Registration Fee                                        $ 1,144.94
         Printing                                                    $ 1,500
         Legal Fees and Expenses                                     $60,000
         Accounting Fees and Expenses                                $ 5,000
         Miscellaneous Expenses (including travel
         and promotional expenses)                                   $ 1,000
                  TOTAL                                              $68,644.94

         *Estimated

     The  Selling  Security  Holders  will  not be  paying  any  portion  of the
foregoing expenses of issuance and distribution.

Item 14. Indemnification of Directors and Officers.

     The Restated  Certificate of  Incorporation of the Company filed as Exhibit
3.1 to this Registration Statement provides as follows:

          No  person  who is or was a  director  of this  Corporation  shall  be
     personally  liable to the  Corporation  or its  stockholders  for  monetary
     damages for the breach of any  fiduciary  duty as a director,  unless,  and
     only to the extent that,  such director is liable (i) for any breach of the
     director's duty of loyalty to the Corporation or its stockholder,  (ii) for
     acts or omissions not in good faith or that involve intentional  misconduct
     or a knowing  violation  of law,  (iii)  under  Section  174 of the General
     Corporation Law of the State of Delaware,  or (iv) for any transaction form
     which the director derived an improper personal benefit.

     Section  145  of  the  Delaware  General  Corporation  Law  gives  Delaware
corporations  the power to indemnify  each of the  Company's  present and former
officers and directors under certain circumstances, if such person acted in good
faith and in a manner which he reasonably  believed to be in, or not opposed to,
the best interests of the  corporation.  The Company's  Restated  Certificate of
Incorporation generally requires the Company to indemnify directors and officers
to the fullest extent permissible under Delaware law.

     The Company has entered into  indemnification  agreements  with its current
directors  and certain of its  executive  officers.  These  agreements  have the
practical  effect in certain cases of eliminating the ability of stockholders to
collect monetary damages from such individuals.

     Under the terms o the  Underwriting  Agreement  to be filed as Exhibit 1 to
the Registration  Statement,  the Underwriters will be obligated,  under certain


                                      II-1


<PAGE>

circumstances,  to  indemnify  officers  and  directors  of the Company  against
certain liabilities under the Securities Act of 1933, as amended (the "Act").

Item 15. Recent Sales of Unregistered Securities.

     (a) The following  information sets forth certain  information with respect
to the sale of securities by the Company since December 31, 1992. All references
to numbers of shares in the  following  discussion  have been  adjusted  to give
effect to the Pre-Public Offering Transactions.

          (1) From January 1, 1990 through the filing date of this  Registration
     Statement,  the Company granted options under the 1990 Stock Option Plan to
     purchase  an  aggregate  of  360,232  shares of Common  Stock at a weighted
     average  price of $3.39 per share and issued  8,028  shares of Common Stock
     upon the exercise of options  granted  under the 1990 Stock Option Plan for
     an aggregate purchase price of $11,479 in cash.

          (2) In  February  1993,  the  Company  issued  and sold a  convertible
     promissory note in the aggregate principal amount of $480,000, and warrants
     to purchase an aggregate of 7,372 shares of Common Stock or 8,000 shares of
     Series C  Preferred  Stock at the lower of (i)  $13.02 or $12.00 per share,
     respectively,  or (ii) the per share  price of Common  Stock in the initial
     public offering to Lincoln Trust Company, custodian FBO Gerald Tsai, Jr.

          (3) In March  through  May 1993,  the  Company  issued and sold demand
     promissory  notes in the  aggregate  principal  amount of  $830,000  for an
     aggregate of $830,000 to Maryann Charlap Azzato, William A. Carter, Charles
     L. Moore,  Michael C. Burrows,  and Michael Dubilier.  In April, William A.
     Carter was repaid $97,566 of his $100,000 Demand Note.

          (4)  In  May,  June  and  July  1993,  the  Company  issued  and  sold
     convertible  notes in the  aggregate  principal  amount  of  $600,000,  and
     warrants to purchase an aggregate of 9,216 shares of Common Stock or 10,000
     shares of Series C Preferred Stock at the lower of (i) $13.02 or $12.00 per
     share,  respectively,  of (ii) the per share  price of Common  Stock in the
     initial  public  offering to Julian and Eunice  Cohen  Investments  Limited
     Partnership,  Sidney Stoneman, Frank B. Carr, Keys foundation, Myron Cherry
     and Lloyd DeVos.

          (5) In June 1993, the Company issued  convertible  promissory notes in
     the  aggregate  principal  amount of 632,434,  and  warrants to purchase an
     aggregate  of 9,216  shares  of Common  Stock or 10,000  shares of Series C
     Preferred   Stock  at  the  lower  of  (i)  $13.02  or  $12.00  per  share,
     respectively,  or (ii) the per share  price of Common  Stock in the initial
     public offering to Maryann Charlap  Azzato,  William A. Carter,  Michael C.
     Burrows and Michael Dubilier in exchange for and forgiveness of $632,434 of
     the March through May 1993 demand promissory notes.

                                      II-2


<PAGE>

          (6) In June 1993,  the Company  issued and sold an aggregate of 16,667
     shares of Series C Preferred Stock at $12,00 per share, for an aggregate of
     $200,004, to Canaan Venture and Canaan Offshore.

          (7) In August  through  December  1993,  the  Company  issued and sold
     convertible   promissory  notes  in  the  aggregate   principal  amount  of
     $1,000,000 and warrants to purchase an aggregate of 16,900 shares of Common
     Stock or  18,337  shares of  Series C  Preferred  Stock at the lower of (i)
     $13.02 or $12.00 per share,  respectively,  or (ii) the per share  price of
     Common Stock in the initial public offering, for an aggregate of $1,100,000
     to Maryann Charlap Azzato, Michael Dubilier, Keys Foundation and William A.
     Carter.

          (8) In October  1993,  the  Company  issued and sold an  aggregate  of
     25,000  shares of Series C  Preferred  Stock at $12.00  per  share,  for an
     aggregate of $300,000 to Canaan Venture and Canaan Offshore.

          (9) In December  1993,  the  Company  issued an  aggregate  of 433,343
     shares of Series C Preferred  Stock at $5.00 per share for an  aggregate of
     $2,166,719 in settlement of $632,434 in principal  plus unpaid  interest of
     the June 1993, convertible promissory notes held by Maryann Charlap Azzato,
     William A.  Carter,  Michael C. Burrows and Michael  Dubilier,  $400,000 in
     principal plus unpaid  interest of the May, June and July 1993  convertible
     promissory  notes  held by Julian  and  Eunice  Cohen  Investments  Limited
     Partnership, Sidney Stoneman, Frank B. Carr and Keys Foundation, $1,082,000
     in  principal  plus unpaid  interests  on the August,  September,  October,
     November and December  1993  convertible  promissory  notes held by Maryann
     Charlap Azzato,  Michael  Dubilier,  Keys Foundation and William A. Carter.
     The above conversion  includes 10,457 shares of Series C Preferred Stock in
     satisfaction of $52,285 of accrued unpaid interest.

          (10) In December  1993,  the Company  agreed to issue 42,502 shares of
     Series C Preferred Stock issued at $5.00 per share for an aggregate  amount
     of $212,510  to certain  vendors  and  suppliers  in payment of some or all
     indebtedness  due them. These suppliers  include  Broadgate and Associates,
     Richard Piani, Austin Darragh and Paul Actor.

          (11) In January 1994,  William A. Carter sold 122,880 shares of Common
     Stock at $3.26 per share to Canaan Ventures and Canaan  Offshore  Ventures,
     Keys Foundation, FLF Associates, Michael Dubilier and Coughlin.

          (12) In January 1994,  the Company  executed an agreement to issue and
     sell  100,000  shares  of  Series C  Preferred  Stock at $5.00 per share to
     William A. Carter and Maryann  Charlap  Azzato  purchased  3,600  shares of
     Series C Preferred Stock at $5.00 per share pursuant to a standby financing
     commitment.

          (13) As of March 31, 1994, the Company  entered into an agreement with
     certain   convertible   promissory   note   holders  to  convert  upon  the
     effectiveness  of the initial  public  offering an aggregate of  $2,400,000
     debt  principal  plus accrued but unpaid  interest  into Series C Preferred
     Stock at $5.00 per share for an aggregate total of 519,224 shares.

                                      II-3


<PAGE>

     This debt consisted of (i) $1,920,000 in principal plus unpaid  interest on
     the December 1992  convertible  promissory notes held by FLF Associates and
     Gerald Tsai,  Jr.; and (ii) $480,000 in principal  plus unpaid  interest on
     the  February  1993  convertible  promissory  note  held by  Lincoln  Trust
     company,  Custodian  FBO Gerald Tsai. In February  1995,  the terms of this
     transaction were restructured,  and a settlement agreement was entered into
     by the parties.  See "Risk Factors - Legal Proceedings," "Risk Factors - No
     Assurance of Certain Debt Conversions" and "Certain Transactions."

          (14) On February 26, 1994,  the Company was in default with respect to
     the principal payment and quarterly  interest payments in arrears under the
     February 26, 1992, $5 million  convertible  note. An amendment to the terms
     of the note has been  executed  to waive the events of default as  follows:
     (1)  convert $2  million in  principal  into  1,131,290  shares of Series B
     Preferred stock upon the  consummation of the  contemplated  initial public
     offering on or before February 26, 1995 and full repayment of the remaining
     principal  balance of the note,  together with any accrued unpaid  interest
     thereon (ii) unpaid  interest after June 30, 1994 shall be paid in the form
     of 60,284  shares of Series B Preferred  stock on a quarterly  basis if the
     contemplated  initial  public  offering  has not  closed  and  the  Company
     receives at least  $1,000,000 under the Bridge Financing (iii) the due date
     of the remaining  principal  balance and accrued  unpaid  interest is to be
     extended  to  February  26,  1995 or the  completion  of an initial  public
     offering,  whichever is earlier  (iv)  increase the warrants to the warrant
     holders to 325,523  shares of the  Company's  Series B  Preferred  Stock or
     300,000  under the  Bridge  Financing  (iii) the due date of the  remaining
     principal balance and accrued unpaid interest is to be extended to February
     26, 1995 or the completion shares of the Company's Series B Preferred Stock
     or 300,000  shares of the  Company's  Common Stock at an exercise  price of
     $1.84  and  $2.00,  respectively,  with an  expiration  date  of vie  years
     following the effective date of an initial public offering (v) require that
     20 percent of certain gross proceeds,  other than Bridge Financing and sale
     of Series C Preferred Stock be used to repay the note (vi) issue additional
     warrants to purchase in aggregate  130,210 shares of the Company's Series B
     Preferred  Stock or  120,000  shares of the  Company's  Common  Stock at an
     exercise price of $1.84 and $2.00,  respectively with an expiration date of
     five years following the effective date of an initial public offering (vii)
     required  the  Company to register  20 percent of the  original  conversion
     shares in a registration statement with gross proceeds to the Company of at
     least $10,000,000 at the Company's  expense,  limited to 111,250 shares per
     quarter  during  the six  month  period  following  the  lock-up  period as
     defined.

          (15) In April 1994,  the Company  executed an  agreement  to issue and
     sell  40,000  shares  of Series C  Preferred  Stock at a price of $5.00 per
     share to Maryann  Charlap  Azzato  pursuant to a private  placement  of the
     Company's securities. As of March 31, 1995, Ms. Azzato has purchased 30,000
     shares of Series C Preferred Stock at a price of $5.00 per share.

          (16) In April 1994 Maryann Charlap Azzato sold 46,080 shares of Common
     Stock at $3.26 per share to Four Partners Associates,  Gerald Tsai and Keys
     Foundation.

                                      II-4


<PAGE>

          (17) In April 1994, Maryann Charlap Azzato,  guaranteed payment of two
     promissory  notes in the aggregate amount of $76,000 payable by the Company
     representing  payments due in  connection  with the Temple  Agreement  (the
     "Temple  Notes").  In return for the  guarantee,  HEM  assigned its rights,
     patents and  related  technology  in its Oragen and Diagen  products to Ms.
     Charlap  Azzato,  which rights will revert to the Company upon repayment of
     the principal on the Temple Notes,  12% interest,  and Ms. Charlap Azzati's
     fees and expenses.  The Company also received a right of first refusal with
     respect  to  the  sales  or  assignment  by  Ms.  Charlap  Azzato  of  this
     technology.  In May and June  1994,  Temple  Agreement  and  nonpayment  of
     certain invoices in the approximate  amount of $1,500. In July 1994, Temple
     notified the Company that it considered the Temple Agreement terminated.

          (18) In May 1994,  the Company  executed a loan  agreement with Bridge
     Ventures,   Inc.  ("Bridge  Ventures")  in  the  amount  of  $100,000.   In
     consideration  for this unsecured loan, the Company issued two-year options
     to purchase 92,160 shares of the Company's Common Stock at $2.72 per share.
     The  loan  term is 60 days or  repayment  from  the  proceeds  of the  next
     financing in excess of $500,000.  The Company has granted certain rights to
     the Company  optionholder to have the options  registered under the Act. In
     August 1994,  Bridge  Ventures  converted  its note into 200,000  shares of
     Common  Stock and received a warrant to purchase  200,000  shares of Common
     Stock of the Company at $3.50 per share. In addition, the Company converted
     a $50,000  consulting fee payable to Bridge Ventures into 100,000 shares of
     Common Stock.

          (19) From July to November 1994, the Company sold 2,050,000  shares of
     Common Stock for an aggregate  consideration of $1,025,000 to 26 accredited
     investors.  In  conjunction  with the  financing,  the  Company  agreed  to
     collateralize  various  patents  until the earlier of an  executed  initial
     public  stock  offering or the  consummation  of  corporate  alliances,  or
     licensing  arrangements  which  provide  significant  operating  capital or
     clinical  development  funding  to the  Company.  In  connection  with  the
     financing, the Company issued warrants to purchase 300,000 shares of Common
     Stock at an  exercise  price of $3.50 per share to Stephen J.  Drescher  in
     November 1994 in exchange for general consulting services.

          (20) In  September  1994,  Maryann  Charlap  Azzato,  entered  into an
     agreement with Lloyd DeVos, a stockholder,  former director and holder of a
     note in the  principal  amount of $100,000  (the "DeVos  Note") in order to
     settle a lawsuit  filed  against the Company and Dr. Carter by Mr. DeVos in
     the United  States  District  Court for the  Southern  District of New York
     alleging  breach of  contract,  conversion  and certain  violations  of the
     federal  securities  laws in  connection  with issuance of Mr. DeVos' note.
     Pursuant to the settlement  agreement,  principal and interest on the DeVos
     Note were repaid by Ms. Azzato as well as certain expenses  incurred by Mr.
     DeVos in the approximate  amount of $2,600 and 1,536 shares of Common Stock
     of the Company were transferred to Mr. DeVos in exchange for the assignment
     to Ms.  Azzato by Mr. DeVos of his right to repayment by the Company of the
     DeVos  Note and  warrant to  purchase  1,667  shares of Series C  Preferred
     Stock.  In  addition,  certain  options to purchase  6,912 shares of Common
     Stock of  the  Company  previously  issued  to  Mr. DeVos  were   delivered

                                      II-5


<PAGE>

     to Mr. DeVos. In exchange for the above  agreement,  Mr. DeVos, the Company
     and Dr.  Carter  executed  mutual  releases  of all  claims  and Mr.  DeVos
     dismissed the suit.

          (21) In  October  1994 in  connection  with the  execution  of the SAB
     Agreement,  the  Company  granted  Cedric C.  Philipp,  a  Director  of the
     Company,  an option to purchase 20,000 shares of Common Stock at a price of
     $3.50 per share.

          (22) In October  1994,  the Company  received  loans in the  aggregate
     amount of $750,000 from Jordan  Belfort and the Belfort  Family Trust.  The
     loans were repaid by the Company without  interest from the proceeds of the
     Bridge Loans.

          (23) In October  and  November  1994,  the  Company  granted  Rule 701
     Warrants to purchase  20,000  shares of Common  Stock at $3.50 per share to
     Maryann Charlap  Azzato,  E. Gerald Kay, Cedric C. Philipp and Peter Rodino
     III. IN addition,  the Company  granted the following  Rule 701 Warrants to
     William A Carter,  200,000 Rule 701  Warrants to Sharon  Will;  and 400,000
     Rule 701 Warrants to Harris Freedman.

          (24) In November 1994, the Company restructured a $100,000 note issued
     to Myron Cherry (the "Cherry  Note"),  a stockholder and former director of
     the Company pursuant to which the repayment date of the principal amount of
     the Cherry Note was  extended to the closing  date of this Public  Offering
     and the accrued but unpaid interest  subsequent to September 30, 1993 shall
     be  converted  into  Common  Stock of the  Company  at a price of $5.43 per
     share.  In the event that this Public Offering is not completed by February
     28,  1995,  the  principal  amount  will be repaid by the Company of Bridge
     Ventures  Inc. by March 6, 1995.  In  addition,  the Company  issued to Mr.
     Cherry 5,000  immediately  exercisable  warrants with an exercise  price of
     $3.50 per share and Bridge Ventures agreed that the unpaid principal on the
     Cherry Note would be  collateralized  by the Company's  patents on the same
     terms as the Bridge Financing arranged by Bridge Ventures. Harris Freedman,
     a Vice President of the Company, is an officer of Bridge Ventures. In March
     1995,  the Company and Myron  Cherry  agreed to extend until March 31, 1995
     the maturity  date of the $100,000  note issued to him. In exchange for the
     extension of the maturity  date,  the Company  issued  warrants to purchase
     5,000  shares of Common  Stock at $3.50  per share to Mr.  Cherry.  In June
     1995,  the Company  repaid the principal  amount due on the Cherry Note; in
     July 1995, the Company repaid the accrued interest due on the Cherry Note.

          (25) Between  February and April 1995, the Company issued Bridge Notes
     in the aggregate principal amount of $1,500,000 to 17 accredited investors.
     The Bridge  Notes bear  interest  at 8% per year and are due the earlier of
     the closing of this Public  Offering August 1, 1996. In  consideration  for
     making the loans,  the Company  granted to the holders of the Bridge  Notes
     Bridgeholder  Options to purchase an aggregate of 1,000,000  Bridge  Units.
     Each Bridge Unit contains one share of Common Stock,  on Class A Redeemable
     Warrant and one Class B Redeemable  Warrant.  The Bridgeholder  Options are
     immediately  exercisable upon the effectiveness of this Public Offering and
     remain exercisable for five years thereafter.

                                      II-6


<PAGE>

          (26) In February 1995, the Company entered a settlement agreement with
     FLF Associates,  Gerald Tsai and Lincoln Trust (the "Tisch/Tsai  Entities")
     to restructure the December 1992 and February 1993 promissory  notes in the
     aggregate  principal  amount of $2,400,000  and settle  certain  threatened
     claims  made by the  Tisch/Tsai  Entities  against the  Company.  This debt
     restructuring  consisted of (i) the  repayment by the Company of $1,200,000
     in  principal,  (ii) the  issuance of  replacement  notes in the  aggregate
     principal amount of $600,000 to the Tisch/Tsai Entities which notes are due
     on the earlier of the  closing of this Public  Offering or May 28, 1996 and
     bear  interest  at the rate of 8% per annum,  which  interest is payable in
     quarterly installments from an interest reserve established by the Company,
     (iii) the conversion of $600,000 of principal into 344,828 shares of Series
     C Preferred  Stock at the rate of $1.74 per share,  (iv) the  amendment and
     restatement  of certain  warrants  issued in  connection  with the original
     notes in  order  to  increase  the  number  of  shares  of  stock  issuable
     thereunder by 32,0000 shares to provide for warrants to purchase a total of
     144,000  shares of Common Stock at an exercise price of $4.00 and $2.00 per
     share,  respectively,  which  warrants are  exercisable  until December 31,
     1997,  and (v) the release by all parties of any  claims.  The  replacement
     notes were secured by a pledge by Dr.  William A. Carter of 112,925  shares
     of Series C Preferred Stock and 240,756 shares of Common Stock. The Company
     may have  been in  default  of these  notes.  See  "Risk  Factors--Possible
     Default on Certain Debt."

          (27) In March 1995, the Company issued a note in the Principal  amount
     of  $200,000  bearing  interest  at the rate of 12% per year to  Gerald  A.
     Brauser,  (the "Original  Brauser  Note").  The Original  Brauser Note also
     provided  for the  issuance of warrants  to purchase  50,000  shares of the
     Company's  Common  Stock at $1.75  per  share.  In May  1995,  the  Company
     restructured  the Original Brauser Note in exchange for the Company issuing
     to  MR.   Brauser  (i)  a  promissory   note  (the  "New  Brauser   Note"),
     collateralized  by the Company's patent estate,  in the principal amount of
     $100,000  bearing  interest  at a rate of 12% per year,  (ii) a warrant  to
     purchase 25,000 shares of Common Stock at a price of $1.75 per share, (iii)
     100,000 shares of Common Stock at $.50 per share, and (iv) a Bridge Loan in
     the amount of $50,000 as well as a Bridgeholder  Option to purchase  33,340
     Bridge  Units.  The New Brauser Note was  originally  due on the earlier of
     June  30,  1995  or  the  Company's  receipt  of  a  certain  payment  from
     SAB/Bioclones but has been amended to extend the date on which repayment is
     due to the  earlier  of  November  2, 1995 or the  closing  of this  Public
     Offering.

          (28) In May 1995,  the  Company and certain  officers,  directors  and
     shareholders  entered into a Standby Financing  Agreement pursuant to which
     the parties  agreed to provide an aggregate of  $5,500,000  in financing to
     the Company during 1995 in the event that existing and additional financing
     is insufficient to cover the cash needs of the Company through December 31,
     1995. In exchange for entering into the Standby  Financing  Agreement,  the
     Company  issued  warrants to purchase an aggregate  of 2,750,000  shares of
     Common Stock at $1.75 per share to the  parties.  In  September  1995,  the
     parties to the 1995 Standby Financing  Agreement,  including Dr. Carter and
     Mr. Kay, agreed to extend their obligations through December 31, 1996.

                                      II-7


<PAGE>

          (29) In June 1995, the Company entered into an agreement with the Sage
     Group  pursuant  to which the Sage Group  agreed to  identify  distribution
     partners for the Company.  In connection with this  agreement,  the Company
     agreed to issue  warrants  to  purchase  100,000  shares  of  Common  Stock
     exercisable at $1.75 per share under certain conditions.

          (30) In June 1996,  the Company  issued  6,000  shares of its Series D
     Preferred  Stock (the "Preferred  Stock") to GFL Advantage Fund Limited,  a
     foreign investment fund at a price of $1,000 per share. The Preferred Stock
     is convertible into Common Stock.

     (b) No underwriters were engaged in connection with the sales of securities
described in Item 15(a).

     The issuances of securities set forth in Item 15(a) were deemed exempt from
registration  under the Act in  reliance  upon  Section  4(2) of the Act and the
rules and  regulations  promulgated  thereunder as transactions by an issuer not
involving  a  public  offering.  The  purchasers  of  securities  in  each  such
transaction   represented   their  intentions  to  acquire  the  securities  for
investment  only  and not  with a view to or for  sale in  connection  with  any
distribution  thereof and  appropriate  legends were  affixed to the  securities
issued in such transactions.  All recipients had adequate access,  through their
relationships   with  the  Company  or  otherwise,   to  information  about  the
Registrant.

Item 16. Exhibits and Financial Statement Schedule

     (a) The following exhibits marked with an * are filed herewith:

     Exhibit No.           Description
     -----------           -----------

     (1)1.1       Form of Underwriting Agreement

     (1)1.2       Form of Selected Dealer Agreement

     (1)1.3       Form of Agreement Among Underwriters

     (1)3.1       Amended  and  Restated   Certificate   of   Incorporation   of
                  Registrant,   as   amended,   along   with   Certificates   of
                  Designations, Rights and Preferences of Series A1, A2, B and C
                  Preferred Stock, as amended

     (1)3.2       By-laws of Registrant, as amended

     3.3*         Certificate of Designations of Series D Preferred Stock

     (1)4.1       Specimen certificate representing Registrant's Common Stock

     (1)4.2       Form of Class A Redeemable Warrant Certificate

                                      II-8


<PAGE>

     (1)4.3       Form of Underwriter's Unit Option Purchase Agreement

     (1)4.4       Form of Class A Redeemable  Warrant Agreement with Continental
                  Stock Transfer and Trust Company

     5.1*         Opinion of Silverman,  Collura & Chernis, P.C. with respect to
                  legality of the securities of the Registrant being registered

     (1)10.1      Registration Rights Agreement, dated as of May 9, 1989

     (1)10.2      Subordination Agreement, dated as of September 18, 1992

     (1)10.3      Series A1 and Series A2 Preferred  Stock  Purchase  Agreement,
                  dated as of January 22, 1991

     (1)10.4      Sixth  Amendment  Agreement,  dates  as  of  March  31,  1994,
                  amending the Series A1 and Series A2 Preferred  Stock Purchase
                  Agreement

     (1)10.5      Seventh  Amendment  Agreement,  dated as of  January  1, 1995,
                  amending the Series A1 and Series A2 Preferred  Stock Purchase
                  Agreement

     (1)10.6      Form of Series C Preferred Stock Subscription Agreement, dated
                  as of June 22, 1993

     (1)10.7      Form of Series C Debt Subscription Agreement, dates as of June
                  30, 1993

     (1)10.8      Form of Note issued with respect to Series C Debt Subscription
                  Agreement, dated as of June 30, 1993

     (1)10.9      Form  of  Warrant   issued  with  respect  to  Series  C  Debt
                  Subscription Agreement, dated as of June 30, 1993

     (1)10.10     Cohn Restructuring Agreement, dated as of March 31, 1994

     (1)10.11     Form of Warrant  issued  with  respect  to Cohn  Restructuring
                  Agreement, dated as of March 31, 1994

     (1)10.12     Note  issued  with  respect to Cohn  Restructuring  Agreement,
                  dated as of March 31, 1994

     (1)10.13     Letter Agreement,  dated April 14, 1994 between the Registrant
                  and Maryann Charlap and Promissory Notes

     (1)10.14     Letter Agreement, dated July 13, 1994 between Bridge Ventures,
                  Inc. and the Registrant

                                      II-9


<PAGE>

     (1)10.15     Letter  Agreement  dated  September  20, 1994 between  Maryann
                  Charlap and Lloyd DeVos

     (1)10.16     Letter Agreement, dated November 1, 1994 among the Registrant,
                  Bridge Ventures, Inc. and Myron Cherry

     (1)10.17     Form of Bridge Loan Agreement and Promissory Note

     (1)10.18     [Intentionally left blank]

     (1)10.19     Form of Registration  Rights Agreement issued pursuant to 1994
                  Common Stock Financing Subscription Agreement

     (1)10.20     Form of Proxy issued  pursuant to 1994 Common Stock  Financing
                  Subscription Agreement

     (1)10.21     Standby  Financing  Agreement,  dated June 2, 1995, as amended
                  September 20, 1995

     (1)10.22     Tisch/Tsai Entities Stock Pledge Agreement, dated February 28,
                  1995

     (1)10.23     Tisch/Tsai Entities Settlement  Agreement,  dated February 28,
                  1995

     (1)10.24     Form of Promissory Note with Tisch/Tsai Entities

     (1)10.25     Form of Warrant with Tisch/Tsai Entities

     (1)10.26     Letter  Agreement,  dated May 4, 12995 between the  Registrant
                  and Gerald Brauser

     (1)10.27     Brauser Note, dated May 2, 1995

     (1)10.28     1990 Stock Option Plan

     (1)10.29     1992 Stock Option Plan

     (1)10.30     1993 Employee Stock Purchase Plan

     (1)10.31     Form of Confidentiality, Invention and Non-Compete Agreement

     (1)10.32     Form of Clinical Research Agreement

     (1)10.33     Form of Collaboration Agreement

     (1)10.34     Employment Agreement by and between the Registrant and John R.
                  Rapoza, dated May 18, 1992

                                      II-10


<PAGE>

     (1)10.35     Employment  Agreement by and between the  Registrant and James
                  R. Owen, dated September 21, 1992

     (1)10.36     Amended and Restated  Employment  Agreement by and between the
                  Registrant and Dr. William A. Cater, dated as of July 1, 1993

     (1)10.37     Employment  Agreement  by and  between  Registrant  and Harris
                  Freedman, dated August 1, 1994

     (1)10.38     Employment  Agreement by and between the Registrant and Sharon
                  Will, dated August 1 1994

     (1)10.39     License  Agreement by and between the Registrant and the Johns
                  Hopkins University, dated December 31, 1980

     (1)10.40     Technology Transfer, Paten License and Supply Agreement by and
                  between the  Registrant,  Pharmacia  LKB  Biotechnology  Inc.,
                  Pharmacio  P-L  Biochemicals  Inc. and E.I. du Pont de Nemours
                  and Company, dated November 24, 1987

     (1)10.41     Pharmaceutical  Use  Agreement,  by and between the Registrant
                  and Temple University, dated August 3, 1988

     (1)10.42     Assignment and Research  Support  Agreement by and between the
                  Registrant,  Hahnemann  University and Dr. David Strayer,  Dr.
                  Isadore Brodsky and Dr. David Gillespie, dated June 30, 1989

     (1)10.43     Lease  Agreement  between  the  Registrant  and Red  Gate  III
                  Limited  Partnership,  dated November 1, 1989, relating to the
                  Registrant's Rockville, Maryland facility

     (1)10.44     Fee  Agreement  between  the  Registrant  and  Choate,  Hall &
                  Stewart, dated January 27, 1993

     (1)10.45     Settlement  and Release  Agreement  between the Registrant and
                  Lloyd DeVos, dated August 18, 1994

     (1)10.46     Agreement  between the Registrant and Bioclones  (Proprietary)
                  Limited

     (1)10.47     Licensing Agreement with Core BioTech Corp.

     (1)10.48     Licensing Agreement with BioPro Corp.

     (1)10.49     Licensing Agreement with BioAegean Corp.

     (1)10.50     Letter Agreement,  dated may 12, 1992,  between the Registrant
                  and Dr. Werner E.G. Muller

                                      II-11


<PAGE>

     (1)10.51     Amendment,  dated  August 3, 1995,  to  Agreement  between the
                  Registrant and Bioclones  (Proprietary)  Limited (contained in
                  Exhibit 10.46)

     (1)10.52     Agreement,  dated  July  16,  1995,  between  the  Registrant,
                  Vernacular  Communications,  Inc.  Gerald Souham,  Mitchell L.
                  Reisman, Craig S. O'Keefe and Robert C. Conaboy

     (1)10.53     Agreement, dated June 27, 1995, between the Registrant and The
                  Sage Group

     (1)10.54     Form of Indemnification Agreement

     (1)10.55     Agreement,  dated  September 13, 1995,  between the Registrant
                  and River Pharma Inc.

     10.56*       Series D Preferred Stock  Subscription  Agreement,  dated June
                  28, 1996

     10.57*       Series D Preferred Stock Registration Rights Agreement,  dated
                  June 28, 1996

     10.58*       GFL  Advantage  Fund Limited  Common Stock  Purchase  Warrant,
                  dated June 28, 1996

     (1)11        Calculation of Earnings Per Share

     (1)14.1      Material Foreign Patents

     (1)21        Subsidiaries of the Registrant

     24.1*        Consent of  Silverman,  Collura & Chernis,  P.C.  (included in
                  Exhibit 5.1)

     24.2*        Consent of KMPG Peat Marwick LLP

     25*          Power of Attorney is  included on the  signature  pages of the
                  Registration Statement

(1)  Incorporated  by  reference  from   Registration   Statement  on  Form  S-1
     (Registration  No.  33-93314)  filed by the Company with the Securities and
     Exchange Commission on November 2, 1995.

     b. Financial Statement Schedules.

     All schedules are omitted from this Registration Statement because they are
not  required  or the  required  information  is  included  in the  Consolidated
Financial Statement or the Notes thereto.

                                      II-12


<PAGE>

Item 17. Undertakings.

     (a)  Rule 415 Offerings.

     The undersigned issuer hereby undertakes that it will:

          (1) File, during any period in which it offers or sells securities,  a
     post-effective amendment to this Registration Statement to:

               (i) Include any  prospectus  required by Section  10(a)(3) of the
          Securities Act of 1933;

               (ii)  Reflect  in the  prospectus  any  facts  or  events  which,
          individually  or  together,  represent  a  fundamental  change  in the
          information in the Registration Statement; and

               (iii) Includes any additional or changed material  information on
          the plan of distribution.

provided,  however,  the paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
Registration  Statement is on Form S-3 or Form S-8, and the information required
in a  post-effective  amendment  by those  paragraphs  is  contained in periodic
reports filed by the  Registrant  pursuant to Section 13 or Section 15(d) of the
Securities  Exchange  Act of 1934  that are  incorporated  by  reference  in the
Registration Statement.

          (2) For determining  liability under the Securities Act of 1933, treat
     each  post-effective  amendment  as a new  registration  statement  of  the
     securities  offered,  and the offering of the securities at that time to be
     the initial bona fide offering.

          (3) File a post-effective amendment to remove from registration any of
     the securities that remain unsold at the end of the offering.

     (b) Request for acceleration of effective date.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933,  as amended (the "Act"),  may be permitted to  directors,  officers and
controlling  persons of the small  business  issuer  pursuant  to the  foregoing
provisions, or otherwise, the issuer has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy
as expressed in the Act and is,  therefore,  unenforceable.  In the event that a
claim for  indemnification  against such liabilities  (other than the payment by
the issuer of expenses  incurred or paid by a director,  officer or  controlling
person  of  the  issuer  in  the  successful  defense  of any  action,  suit  or
proceedings)  is asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the issuer will, unless in the
opinion of its counsel  the matter has been  settled by  controlling  precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such court.

                                      II-13


<PAGE>

     (2) For  determining  any liability  under the  Securities  Act of 1933, as
amended, treat each post-effective  amendment that contains a form of prospectus
as a new registration  statement for the securities  offered in the registration
statement,  and that offering of the securities at that time as the initial bona
fide offering of those securities.

                                      II-14


<PAGE>

                                   SIGNATURES

         In accordance with the  requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the  requirements  of filing  on Form S-1 and  authorized  this  registration
statement  to be  signed  on its  behalf  by the  undersigned,  in the  City  of
Philadelphia, State of Pennsylvania, on July 25, 1996.

                                       HEMISPHERX BIOPHARMA, INC.

                                       By: s\William A. Carter, M.D.
                                         ---------------------------------------
                                             William A. Carter, M.D., CEO

                                POWER OF ATTORNEY

     Each person whose signature  appear below  constitutes and appoints William
A. Carter, M.D. his true and lawful  attorney-in-fact and agent, with full power
of substitution and  resubstitution for him and in his name, place and stead, in
any and all capacities to sign any and all amendments (including  post-effective
amendments)  to this  Registration  Statement,  and to file the  same,  with all
exhibits  thereto,  and  other  documents  in  connection  therewith,  with  the
Securities and Exchange  Commission,  and to take such actions in, and file with
the appropriate  authorities in, whatever states said attorney-in-fact and agent
shall determine, such applications,  statements, consents and other documents as
may be necessary or  expedient to register  securities  of the Company for sale,
granting unto said  attorney-in-fact and agent full power and authority to do so
and perform  each and every act and thing  requisite  or necessary to be done in
and about the  premises,  as fully to all  intents  and  purposes as he might or
could  do  in  person,   hereby   ratifying   and   confirming   all  that  said
attorney-in-fact  and agent or his substitute or substitutes  may lawfully do or
cause  to be done by  virtue  hereof  and the  Registrant  hereby  confers  like
authority on its behalf.

     In accordance  with the  requirements  of the Securities Act of 1933,  this
Registration statement was signed by the following persons in the capacities and
on the dates stated.

         Signature                   Title                     Date
         ---------                   -----                     ----
                                       
                             Principal Executive Officer
                             and Chairman of the Board
                             and as Power of Attorney
s\William A. Carter, M.D.    for Members of the Board             July 25, 1996
- -------------------------
William A. Carter, M.D.

                             Principal Financial Officer and
s\Robert E. Peterson         Principal Accounting Officer         July 25, 1996
- -------------------------
Robert E. Peterson

                             Special Advisor to the Board
s\Cedric C. Philipp          Associate Secretary and Director     July 25, 1996
- -------------------------
Cedric C. Philipp



                                     II-15
<PAGE>

                               Secretary and Director             July __, 1996
_______________________
Peter W. Rodino III

s\Richard C. Piani           Director                             July 25, 1996
- ---------------------
Richard C. Piani


s\E. Gerald Kay               Director                            July 25, 1996
- ---------------------
E. Gerald Kay

                                      II-16




                           HEMISPHERx BIOPHARMA, INC.

                           CERTIFICATE OF DESIGNATIONS
                                       OF
                      SERIES D CONVERTIBLE PREFERRED STOCK

             (Pursuant to Section 151 of the General Corporation Law
                            of the State of Delaware)

                                     ------

     Hemispherx BioPharma, Inc., a Delaware corporation (the "Corporation"),  in
accordance with the provisions of Section 103 of the General  Corporation Law of
the State of Delaware (the "DGCL") DOES HEREBY CERTIFY:

     That  pursuant  to  authority  vested  in the  Board  of  Directors  of the
Corporation by the Certificate of Incorporation, as amended, of the Corporation,
the Board of  Directors  of the  Corporation,  pursuant to a  unanimous  written
consent of Directors, dated July 2, 1996, adopted a resolution providing for the
creation of a series of the Corporation's Preferred Stock, $.01 par value, which
series is designated "Series D Convertible Preferred Stock," which resolution is
as follows:

     RESOLVED,  that  pursuant to authority  vested in the Board of Directors of
the Corporation by the Certificate of  Incorporation,  as amended,  the Board of
Directors  does  hereby  provide for the  creation of a series of the  Preferred
Stock,  $.01  par  value  (hereafter  called  the "  Preferred  Stock"),  of the
Corporation,  and to the  extent  that the voting  powers and the  designations,
preferences  and  relative,  participating,  optional  or other  special  rights
thereof and the qualifications,  limitations or restrictions of such rights have
not been set forth in the  Certificate  of  Incorporation,  as  amended,  of the
Corporation, does hereby fix the same as follows:

                      SERIES D CONVERTIBLE PREFERRED STOCK

     Section 1.  Designation  and  Amount.  The shares of such  series  shall be
designated as "Series D Convertible  Preferred Stock" (the "Series D Convertible
Preferred  Stock"),   and  the  number  of  shares  constituting  the  Series  D
Convertible  Preferred  Stock  shall be  6,000,  and  shall  not be  subject  to
increase.

     Section 2. Stated  Capital.  The amount to be represented in stated capital
at all times for each share of Series D Convertible Preferred Stock shall be the
sum of (i) $1,000, (ii) to the extent legally available,  the accrued but unpaid
dividends on such share of Series D Convertible Preferred Stock, and (iii) to be

<PAGE>

determined  on at least a quarterly  basis,  an amount  equal to the accrued and
unpaid  interest on dividends in arrears through the date of  determination  (as
provided in Section 4).

     Section 3. Rank.  All Series D Convertible  Preferred  Stock shall rank (i)
senior to the Common Stock, par value $.001 per share (the "Common  Stock"),  of
the  Corporation,  now or  hereafter  issued,  as to  payment of  dividends  and
distribution  of assets  upon  liquidation,  dissolution,  or  winding up of the
Corporation,  whether  voluntary or  involuntary,  and (ii) on a parity with any
additional  series of preferred  stock of any class which the Board of Directors
or the  stockholders  may from time to time  authorize,  both as to  payment  of
dividends and as to distributions of assets upon  liquidation,  dissolution,  or
winding up of the Corporation, whether voluntary or involuntary.

     Section 4. Dividends and Distributions. (a) The holders of shares of Series
D Convertible  Preferred  Stock shall be entitled to receive,  when,  as, and if
declared by the Board of Directors of the Corporation  (the "Board of Directors"
or the "Board") out of funds legally  available  for such purpose,  dividends at
the rate of $50.00  per  annum  per  share,  and no more,  which  shall be fully
cumulative,  shall accrue without interest (except as otherwise  provided herein
as to  dividends  in arrears)  from the date of original  issuance  and shall be
payable in cash  quarterly  on January 1, April 1, July 1, and October 1 of each
year  commencing  October 1, 1996  (except  that if any such date is a Saturday,
Sunday,  or legal  holiday,  then such  dividend  shall be  payable  on the next
succeeding day that is not a Saturday,  Sunday,  or legal holiday) to holders of
record as they  appear  on the stock  books of the  Corporation  on such  record
dates,  not more than 20 nor less than 10 days  preceding  the payment dates for
such  dividends,  as  shall be fixed by the  Board.  Dividends  on the  Series D
Convertible Preferred Stock shall be paid in cash or, subject to the limitations
in  Section  4(b)  hereof,  shares of  Common  Stock of the  Corporation  or any
combination of cash and shares of Common Stock, at the option of the Corporation
as hereinafter provided. The amount of the dividends payable per share of Series
D  Convertible  Preferred  Stock for each  quarterly  dividend  period  shall be
computed by dividing the annual dividend amount by four. The amount of dividends
payable  for the  initial  dividend  period and any period  shorter  than a full
quarterly  dividend  period  shall be computed on the basis of a 360-day year of
twelve 30-day months.  Dividends not paid on a payment date, whether or not such
dividends  have been  declared,  will bear interest at the rate of 12% per annum
until paid. No dividends or other  distributions,  other than dividends  payable
solely  in  shares of Common  Stock or other  capital  stock of the  Corporation
ranking  junior as to  dividends  to the Series D  Convertible  Preferred  Stock
(collectively,  the  "Junior  Dividend  Stock"),  shall be paid or set apart for
payment on any shares of Junior Dividend Stock, and no purchase,  redemption, or


                                      -2-
<PAGE>

other  acquisition  shall be made by the  Corporation  of any  shares  of Junior
Dividend Stock unless and until all accrued and unpaid dividends on the Series D
Convertible  Preferred  Stock and  interest on  dividends in arrears at the rate
specified herein shall have been paid or declared and set apart for payment.

     If at any time any dividend on any capital stock of the Corporation ranking
senior as to dividends to the Series D Convertible  Preferred Stock (the "Senior
Dividend Stock") shall be in default,  in whole or in part, no dividend shall be
paid or declared and set apart for payment on the Series D Convertible Preferred
Stock  unless and until all accrued  and unpaid  dividends  with  respect to the
Senior  Dividend  Stock,  including  the full  dividends  for the  then  current
dividend  period,  shall have been paid or declared  and set apart for  payment,
without interest.  No full dividends shall be paid or declared and set apart for
payment on any class or series or the Corporation's capital stock ranking, as to
dividends,  on a parity  with the  Series D  Convertible  Preferred  Stock  (the
"Parity  Dividend Stock") for any period unless all accrued but unpaid dividends
(and interest on dividends in arrears at the rate  specified  herein) have been,
or contemporaneously are, paid or declared and set apart for such payment on the
Series  D  Convertible  Preferred  Stock.  No full  dividends  shall  be paid or
declared and set apart for payment on the Series D Convertible  Preferred  Stock
for  any  period  unless  all  accrued  but  unpaid   dividends  have  been,  or
contemporaneously  are, paid or declared and set apart for payment on the Parity
Dividend Stock for all dividend  periods  terminating on or prior to the date of
payment of such full  dividends.  When  dividends  are not paid in full upon the
Series  D  Convertible  Preferred  Stock  and the  Parity  Dividend  Stock,  all
dividends  paid or declared  and set apart for  payment  upon shares of Series D
Convertible  Preferred  Stock (and  interest on dividends in arrears at the rate
specified  herein) and the Parity  Dividend  Stock shall be paid or declared and
set apart for payment pro rata, so that the amount of dividends paid or declared
and set apart for payment per share on the Series D Convertible  Preferred Stock
and the  Parity  Dividend  Stock  shall in all cases bear to each other the same
ratio  that  accrued  and unpaid  dividends  per share on the shares of Series D
Convertible Preferred Stock and the Parity Dividend Stock bear to each other.

     Any references to  "distribution"  contained in this Section 4 shall not be
deemed to include any stock dividend or  distributions  made in connection  with
any  liquidation,  dissolution,  or  winding  up  of  the  Corporation,  whether
voluntary or involuntary.

     (b) If the  Corporation  elects in the exercise of its sole  discretion  to
issue shares of Common Stock in payment of dividends on the Series D Convertible
Preferred Stock, the Corporation shall issue and dispatch, or cause to be issued
and  dispatched,  to each holder of such shares a certificate  representing  the
number of whole  shares of Common  Stock  arrived at by  dividing  the per share
Computed  Price of such  shares of Common  Stock  into the total  amount of cash


                                      -3-
<PAGE>

dividends such holder would be entitled to receive if the aggregate dividends on
the Series D  Convertible  Preferred  Stock held by such holder  which are being
paid in shares of Common Stock were being paid in cash; provided,  however, that
if certificates representing shares of Common Stock are issued and dispatched to
holders of Series D Convertible  Preferred Stock subsequent to the third trading
day after a dividend payment date, the percentage used to calculate the Computed
Price will be reduced by one for each  trading  day after the third  trading day
following such dividend payment date to the date of dispatch of shares of Common
Stock.  No  fractional  shares of Common  Stock  shall be issued in  payment  of
dividends.  In lieu  thereof,  the  Corporation  may issue a number of shares of
Common  Stock to each holder  which  reflects a rounding  to the  nearest  whole
number  of shares of Common  Stock or may pay cash.  The  Corporation  shall not
exercise  its right to issue  shares of Common  Stock in payment of dividends on
Series D Convertible Preferred Stock if:

          (i) the  number  of shares  of  Common  Stock at the time  authorized,
     unissued and  unreserved  for all  purposes,  or held in the  Corporation's
     treasury,  is  insufficient to pay the portion of such dividends to be paid
     in shares of Common Stock;

          (ii) the  issuance or delivery of shares of Common Stock as a dividend
     payment would  require  registration  with or approval of any  governmental
     authority  under any law or regulation,  and such  registration or approval
     has not been effected or obtained;

          (iii) the shares of Common  Stock to be issued as a  dividend  payment
     have not been authorized for listing,  upon official notice of issuance, on
     any securities exchange or market on which the Common Stock is then listed;
     or have not been  approved  for  quotation if the Common Stock is traded in
     the over-the-counter market;

          (iv) the Computed Price  (determined  without regard to the proviso to
     the definition  thereof) is less than the par value of the shares of Common
     Stock;

          (v) the  shares of  Common  Stock  (A)  cannot be sold or  transferred
     without  restriction  by  unaffiliated  holders who receive  such shares of
     Common  Stock  as a  dividend  payment  or (B) are no  longer  listed  on a
     national securities  exchange,  on the Nasdaq National Market or the Nasdaq
     SmallCap Market; or

          (vi) the issuance of shares of Common Stock in payment of dividends on
     Series D Convertible  Preferred Stock held by any GFL Person (as defined in
     Section 9(a) hereof)  would  result in any GFL Person  beneficially  owning
     
                                      -4-
<PAGE>

     more than 4.9% of the Common  Stock,  determined as provided in the proviso
     to the second sentence of Section 9(a) hereof.

     Shares  of  Common  Stock  issued  in  payment  of  dividends  on  Series D
Convertible  Preferred  Stock  pursuant  to this  Section  shall be, and for all
purposes shall be deemed to be,  validly  issued,  fully paid and  nonassessable
shares of Common Stock of the Corporation;  the issuance and delivery thereof is
hereby authorized;  and the dispatch thereof will be, and for all purposes shall
be deemed to be,  payment in full of the  cumulative  dividends to which holders
are entitled on the applicable dividend payment date.

     "Computed  Price" of shares of Common  Stock on any date means the  product
obtained by  multiplying  (x) the  Conversion  Percentage (as defined in Section
9(b)) as in effect on such date times (y) the  arithmetic  mean of the per share
Closing  Price (as  defined  in Section  9(b)) of the Common  Stock for the five
consecutive trading days ending on the fifth trading day prior to the applicable
dividend payment date; provided however, that, notwithstanding the foregoing, in
no event shall the Computed Price be less than $.001 per share.

     Section  5.  Liquidation  Preference.   In  the  event  of  a  liquidation,
dissolution, or winding up of the Corporation, whether voluntary or involuntary,
the holders of Series D Convertible Preferred Stock shall be entitled to receive
out of the assets of the  Corporation,  whether  such assets  constitute  stated
capital or surplus of any  nature,  an amount per share of Series D  Convertible
Preferred Stock equal to the sum of (i) all dividends accrued and unpaid thereon
to the date of final  distribution  to such  holders,  (ii)  accrued  and unpaid
interest  on  dividends  in  arrears  to the  date of  distribution,  and  (iii)
$1,000.00 (collectively,  "the Liquidation Preference"), and no more, before any
payment shall be made or any assets  distributed  to the holders of Common Stock
or any other class or series of the  Corporation's  capital stock ranking junior
as  to  liquidation   rights  to  the  Series  D  Convertible   Preferred  Stock
(collectively,  the "Junior Liquidation Stock");  provided,  however,  that such
rights shall accrue to the holders of Series D Convertible  Preferred Stock only
in the event that the  Corporation's  payments  with respect to the  liquidation
preference of the holders of capital stock of the Corporation  ranking senior as
to liquidation  rights to the Series D Convertible  Preferred Stock (the "Senior
Liquidation  Stock") are fully met.  After the  liquidation  preferences  of the
Senior  Liquidation  Stock are fully met, the entire  assets of the  Corporation
available for distribution shall be distributed ratably among the holders of the
Series D  Convertible  Preferred  Stock  and any  other  class or  series of the
Corporation's  capital  stock having  parity as to  liquidation  rights with the
Series D  Convertible  Preferred  Stock  (the  "Parity  Liquidation  Stock" ) in
proportion to the respective preferential amounts to which each is entitled (but
only to the extent of such preferential  amounts).  After payment in full of the


                                      -5-
<PAGE>

liquidation price of the shares of the Series D Convertible  Preferred Stock and
the Parity  Liquidation  Stock, the holders of such shares shall not be entitled
to any further  participation  in any distribution of assets by the Corporation.
Neither a consolidation  or merger of the Corporation  with another  corporation
nor a sale or  transfer  of all or part of the  Corporation's  assets  for cash,
securities, or other property in and of itself will be considered a liquidation,
dissolution, or winding up of the Corporation.

     Section 6. No  Mandatory  Redemption.  The  shares of Series D  Convertible
Preferred Stock shall not be subject to mandatory redemption by the Corporation.

     Section 7. No Sinking Fund.  The shares of Series D  Convertible  Preferred
Stock  shall not be subject  to the  operation  of a  purchase,  retirement,  or
sinking fund.

     Section 8. Optional Redemption. So long as the Corporation is in compliance
in all material respects with its obligations to the holders of shares of Series
D Convertible  Preferred Stock (including,  without limitation,  its obligations
under the Registration Rights Agreement between the Corporation and the original
holder of the Series D Convertible  Preferred  Stock (the  "Registration  Rights
Agreement")  and  the  provisions  of this  Certificate  of  Designations),  the
Corporation  shall have the right,  exercisable on not less than 15 days or more
than 20 days  written  notice to the holders of record of the shares of Series D
Convertible  Preferred  Stock to be redeemed,  at any time and from time to time
after the Registration Effective Date (as defined in Section 9(b)) to redeem all
of the shares or any part of not less than 600 shares (or such lesser  number of
shares of Series D Convertible  Preferred  Stock as shall remain  outstanding at
the time of exercise of such redemption right) of Series D Convertible Preferred
Stock in accordance  with this Section 8. Any notice of redemption (a "Notice of
Redemption")  under this Section shall be delivered to the holders of the shares
of Series D  Convertible  Preferred  Stock at their  addresses  appearing on the
records of the Corporation; provided, however, that any failure or defect in the
giving of notice to any such holder  shall not affect the  validity of notice to
or the redemption of shares of Series D Convertible Preferred Stock of any other
holder.  Any Notice of Redemption may, subject to the 15 and 20 day restrictions
stated above, be given prior to the Registration Effective Date, but in any such
case may not specify a Redemption Date (as herein defined) prior to a date which
is after the  Registration  Effective Date. Any Notice of Redemption shall state
(1) that the  Corporation  is exercising its right to redeem all or a portion of
the outstanding shares of Series D Convertible  Preferred Stock pursuant to this
Section 8, (2) the number of shares of Series D Convertible Preferred Stock held
by  such  holder  which  are  to be  redeemed,  (3)  the  Redemption  Price  (as
hereinafter  defined) per share of Series D  Convertible  Preferred  Stock to be
redeemed,  determined  in  accordance  with  this  Section  and (4) the  date of


                                      -6-
<PAGE>

redemption of such shares of Series D Convertible Preferred Stock, determined in
accordance with this Section (the  "Redemption  Date").  On the Redemption Date,
the Corporation shall make payment or cause to be paid in immediately  available
funds of the applicable Redemption Price (as hereinafter defined) to each holder
of shares of Series D Convertible  Preferred Stock to be redeemed to or upon the
order of such holder as specified  by such holder in writing to the  Corporation
at least one  business  day prior to the  Redemption  Date.  If the  Corporation
exercises  its right to redeem  all or a portion  of the  outstanding  shares of
Series D Convertible Preferred Stock the Corporation shall make payment or cause
to be paid to the holders of the shares of Series D Convertible  Preferred Stock
to be redeemed in respect of each share of Series D Convertible  Preferred Stock
to be  redeemed  of an  amount  equal to the  greater  of (a) the sum of (A) the
amount of the  Liquidation  Preference  of such  share of  Series D  Convertible
Preferred Stock determined as of the applicable  Redemption Date and (B) $333.33
and (b) an amount equal to the product obtained by multiplying (x) the number of
shares of Common  Stock which  would,  but for the  redemption  pursuant to this
Section 8, be issuable on  conversion  in  accordance  with  Section 9(a) of one
share of  Series D  Convertible  Preferred  Stock  and any  accrued  and  unpaid
dividends  thereon and any accrued and unpaid  interest on dividends  thereon in
arrears if a notice of  conversion  were  given by the  holder of such  Series D
Convertible  Preferred  Stock on the  Redemption  Date times (y) the  arithmetic
average of the Closing  Price (as defined in Section  9(b)) of the Common  Stock
for the five  consecutive  trading  days  ending  one  trading  day prior to the
Redemption Date (such greater amount being referred to herein as the "Redemption
Price").  Upon redemption of less than all of the shares of Series D Convertible
Preferred Stock evidenced by a particular certificate, promptly, but in no event
later than  three  business  days after  surrender  of such  certificate  to the
Corporation,  the  Corporation  shall issue a  replacement  certificate  for the
shares of Series D  Convertible  Preferred  Stock which have not been  redeemed.
Only whole shares of Series D Convertible  Preferred  Stock may be redeemed.  If
the Corporation  exercises its right to redeem less than all outstanding  shares
of Series D Convertible  Preferred Stock, then such redemption shall be made, as
nearly as  practical,  pro rata  among  the  holders  of record of the  Series D
Convertible  Preferred Stock.  Except as otherwise permitted by Section 9 hereof
in  connection  with a conversion  of shares of Series D  Convertible  Preferred
Stock pursuant to Section 9(a), no share of Series D Convertible Preferred Stock
as to which the holder  exercises the right of conversion  pursuant to Section 9
hereof may be redeemed by the Corporation pursuant to this Section 8 on or after
the date of exercise of such conversion  right  regardless of whether the Notice
of  Redemption  shall  have been  given  prior to the date of  exercise  of such
conversion right.

                                      -7-
<PAGE>

     Section 9. Conversion.

     (a) Conversion at Option of Holder. The holders of the Series D Convertible
Preferred Stock may, upon surrender of the certificates therefor, convert any or
all of their shares of Series D Convertible  Preferred Stock into fully paid and
nonassessable  shares of Common Stock and such other  securities and property as
hereinafter provided.  Commencing on the date which is 76 days after the date of
initial  issuance  of  shares  of  Series D  Convertible  Preferred  Stock  (the
"Issuance Date") and at any time thereafter,  each share of Series D Convertible
Preferred Stock initially may be converted at the principal executive offices of
the  Corporation,  the office of any transfer agent for the Series D Convertible
Preferred  Stock,  if any, the office of any transfer agent for the Common Stock
or at such  other  office or  offices,  if any,  as the Board of  Directors  may
designate,  into such  number of whole  fully paid and  nonassessable  shares of
Common  Stock  (calculated  as to each  conversion  to the nearest  1/100th of a
share)  determined by dividing (x) the sum of (i) the  Conversion  Amount,  (ii)
accrued but unpaid  dividends  to the  Conversion  Date on the share of Series D
Convertible  Preferred  Stock  being  converted,  and (iii)  accrued  but unpaid
interest on the dividends on the share of Series D Convertible  Preferred  Stock
being  converted in arrears to the  Conversion  Date by (y) the lower of (1) the
product of (A) the Conversion Percentage times (B) the arithmetic average of the
Closing  Price  of  the  Common  Stock  on the  five  consecutive  trading  days
immediately  preceding the  Conversion  Date or (2) $4.00  (subject to equitable
adjustments for stock splits, stock dividends, combinations,  recapitalizations,
reclassifications and similar events occurring on or after the date of filing of
this  Certificate  of  Designations  with the Secretary of State of the State of
Delaware),  in each case subject to  adjustment  as  hereinafter  provided  (the
"Conversion Rate"); provided, however, that in no event shall GFL Advantage Fund
Limited  ("Advantage") be entitled to convert any shares of Series D Convertible
Preferred  Stock in  excess of that  number  of  shares of Series D  Convertible
Preferred  Stock upon conversion of which the sum of (1) the number of shares of
Common  Stock  beneficially  owned by  Advantage  or any  person  associated  or
affiliated  with, or serving as an adviser to Advantage (each a "GFL Person" and
collectively,  the "GFL  Persons")  (other  than shares of Common  Stock  deemed
beneficially  owned  through the  ownership  of  unconverted  shares of Series D
Convertible  Preferred  Stock and  unexercised  Warrants)  and (2) the number of
shares of Common Stock  issuable upon the  conversion of the number of shares of
Series D Convertible  Preferred Stock with respect to which the determination in
this  proviso is being made,  would  result in  beneficial  ownership by any GFL
Person of more than 4.9% of the outstanding shares of Common Stock. For purposes
of the proviso to the immediately preceding sentence, beneficial ownership shall
be determined in accordance with Section 13(d) of the Securities Exchange Act of
1934, as amended, and Regulation 13D-G thereunder,  except as otherwise provided
in  clause  (1) of  the  proviso  to the  immediately  preceding  sentence.  The


                                      -8-
<PAGE>

"Conversion  Price"  shall be  equal to the  Conversion  Amount  divided  by the
Conversion  Rate.  Notwithstanding  any other  provision  of this  Section 9, in
connection  with each conversion by any holder of shares of Series D Convertible
Preferred  Stock,  in lieu of issuing shares of Common Stock on conversion of up
to  one-half  of the  shares  of  Series  D  Convertible  Preferred  Stock to be
converted by such holder in such  conversion,  the Company shall have the right,
exercisable  by notice as herein  provided  to a holder of Series D  Convertible
Preferred  Stock who shall  have given a notice of  conversion,  to redeem up to
one-half of the shares of Series D  Convertible  Preferred  Stock at a price per
share equal to the Redemption  Price (as calculated in accordance with Section 8
hereof).  Notice of any  redemption  pursuant to this Section 9(a) in connection
with a  particular  conversion  shall be given not later  than one day after the
Corporation   receives  the  notice  of  conversion  in  connection   with  such
conversion,  may be sent by telephone line facsimile transmission to such number
as the  Corporation  shall have obtained from such holder for this purpose,  and
shall be  effective  only  upon  actual  receipt  by such  holder.  A notice  of
redemption pursuant to this Section 9(a) shall state (1) the number of shares of
Series D Convertible Preferred Stock to be redeemed and (2) the Redemption Price
per share. The Redemption Price for any redemption pursuant to this Section 9(a)
shall be paid by wire transfer of immediately available funds to such account as
the  holder  exercising  such  conversion  right  shall  have  specified  to the
Corporation  for this  purpose and shall be paid not later than one business day
after the Corporation  shall have given a notice of redemption  pursuant to this
Section 9(a).  Time is of the essence for any notice of redemption or payment of
the Redemption Price pursuant to this Section 9(a). If the Corporation shall not
give  timely  or  proper  notice of a  redemption  or shall  fail to pay in full
Redemption  Price of all shares of Series D  Convertible  Preferred  Stock to be
redeemed,  then such  shares of Series D  Convertible  Preferred  Stock shall be
converted into shares of Common Stock in accordance herewith and notwithstanding
any wire by the Corporation of any such defect or failure.

     (b) Certain Definitions.

     As used herein,  the "Closing Price" of any security on any date shall mean
the closing bid price of such security on such date on the principal  securities
exchange on which such security is traded.

     "Computation  Date"  means (1) the date which is 90 days after the  Closing
Date, unless the Registration  Statement required to be filed by the Corporation
pursuant to Section 2(a) of the Registration  Rights  Agreement  theretofore has
been  declared  effective  by the SEC,  and, (2) if the  Registration  Statement
required  to be  filed  by the  Corporation  pursuant  to  Section  2(a)  of the


                                      -9-
<PAGE>

Registration Rights Agreement has not theretofore been declared effective by the
SEC, each date which is 30 days after a Computation Date.

     As used  herein,  the  "Conversion  Amount"  initially  shall  be  equal to
$1,000.00, subject to adjustment as hereinafter provided.

     As used herein,  "Conversion  Date" shall mean the date on which the notice
of conversion is actually  received by the Corporation,  in case of a conversion
at the option of the holder pursuant to Section 9(a).

     As used herein, "Conversion Percentage" shall mean 75 percent, except that,
if the Registration Statement is not ordered effective by the SEC within 90 days
after the Issuance  Date,  then the  percentage  stated above in this  paragraph
shall be reduced by two and one half percentage  points on each Computation Date
or by a pro rated portion of such two and one half percentage points in the case
of any  Computation  Date  which  is less  than 30  days  subsequent  to a prior
Computation  Date;  provided,  however,  that if the  arithmetic  average of the
Closing  Price on the five  consecutive  trading  days  immediately  preceding a
particular  Conversion Date is $2.00 (subject to equitable adjustments for stock
splits, stock dividends, combinations, recapitalizations,  reclassifications and
similar events  occurring on or after the date of filing of this  Certificate of
Designations with the Secretary of State of the State of Delaware) or less, then
the  Conversion  Percentage  applicable to such  Conversion  Date shall mean 100
percent, regardless of the actual amount otherwise determined pursuant hereto.

     As used herein,  "Registration  Effective Date" shall mean, with respect to
any  share of  Series  D  Convertible  Preferred  Stock,  the date on which  the
Registration  Statement  required  to be filed by the  Corporation  with the SEC
pursuant to Section 2(a) of the  Registration  Rights Agreement is first ordered
effective by the SEC.

     As used  herein,  "Registration  Statement"  shall  mean  the  Registration
Statement  required  to be filed by the  Corporation  with the SEC  pursuant  to
Section 2(a) of the Registration Rights Agreement.

     As used herein,  "SEC" shall mean the United States Securities and Exchange
Commission.

     (c) Other  Provisions.  Notwithstanding  anything in this  Section 9 to the
contrary,  no change in the  Conversion  Amount shall actually be made until the
cumulative effect of the adjustments called for by this Section 9 since the date
of the last change in the Conversion  Amount would change the Conversion  Amount
by more than 1%.  However,  once the  cumulative  effect  would result in such a


                                      -10-
<PAGE>

change,  then the  Conversion  Rate shall  actually  be  changed to reflect  all
adjustments   called   for  by  this   Section  9  and  not   previously   made.
Notwithstanding  anything in this Section 9, no change in the Conversion  Amount
shall be made that would result in a Conversion Price of less than the par value
of the Common Stock into which shares of Series D  Convertible  Preferred  Stock
are at the time convertible.

     The holders of shares of Series D Convertible  Preferred Stock at the close
of business on the record date for any  dividend  payment to holders of Series D
Convertible Preferred Stock shall be entitled to receive the dividend payable on
such shares on the  corresponding  dividend  payment  date  notwithstanding  the
conversion  thereof after such dividend payment record date or the Corporation's
default in payment of the dividend due on such dividend payment date;  provided,
however,  that shares of Series D Convertible  Preferred  Stock  surrendered for
conversion  during the period  between  the close of business on any record date
for a dividend payment and the opening of business on the corresponding dividend
payment date must be  accompanied  by payment of an amount equal to the dividend
payable on such  shares on such  dividend  payment  date.  A holder of shares of
Series D Convertible Preferred Stock on a record date for a dividend payment who
(or whose  transferee)  tenders any of such shares for conversion into shares of
Common  Stock on or after such  dividend  payment date will receive the dividend
payable by the  Corporation  on such  shares of Series D  Convertible  Preferred
Stock on such date,  and the converting  holder need not include  payment of the
amount of such  dividend  upon  surrender  of  shares  of  Series D  Convertible
Preferred Stock for conversion. Except as provided above, no adjustment shall be
made in  respect  of cash  dividends  on Common  Stock or  Series D  Convertible
Preferred  Stock that may be accrued  and  unpaid at the date of  surrender  for
conversion.

     The right of the holders of Series D Convertible Preferred Stock to convert
their shares shall be exercised by delivering to the  Corporation  or its agent,
as provided above, a written notice,  duly signed by or on behalf of the holder,
stating  the  number of shares of  Series D  Convertible  Preferred  Stock to be
converted.  Promptly, but in no event later than 10 business days after delivery
of a notice of conversion,  such holder shall  surrender for such purpose to the
Corporation or its agent, as provided above, certificates representing shares to
be converted,  duly endorsed in blank or  accompanied  by proper  instruments of
transfer. If such holder shall fail to deliver certificates  representing shares
to be converted in such form on or prior to such tenth business day, such notice
of  conversion   shall  not  be  effective,   unless  otherwise  agreed  by  the
Corporation,  but such failure shall not affect such  holder's  right to convert
such shares at a date after the date such notice of  conversion  was given.  The
Corporation  shall pay any tax arising  under United  States  federal,  state or
local law in  connection  with any  conversion of shares of Series D Convertible
Preferred Stock except that the Corporation shall not,  however,  be required to


                                      -11-
<PAGE>

pay any tax which may be  payable in respect  of any  transfer  involved  in the
issue and delivery upon conversion of shares of Common Stock or other securities
or  property in a name other than that of the holder of the shares of the Series
D Convertible Preferred Stock being converted,  and the Corporation shall not be
required  to issue or deliver any such  shares or other  securities  or property
unless and until the person or persons  requesting  the issuance  thereof  shall
have  paid  to the  Corporation  the  amount  of any  such  tax  or  shall  have
established to the satisfaction of the Corporation that such tax has been paid.

     The  Corporation  (and any  successor  corporation)  shall  take all action
necessary so that a number of shares of the authorized but unissued Common Stock
(or common stock in the case of any successor corporation) sufficient to provide
for the conversion of the Series D Convertible  Preferred Stock outstanding upon
the basis hereinbefore provided are at all times reserved by the Corporation (or
any successor  corporation),  free from preemptive  rights, for such conversion,
subject to the provisions of the next succeeding  paragraph.  If the Corporation
shall issue any  securities  or make any change in its capital  structure  which
would  change the number of shares of Common  Stock into which each share of the
Series D Convertible  Preferred  Stock shall be convertible as herein  provided,
the  Corporation  shall at the same  time  also make  proper  provision  so that
thereafter  there  shall be a  sufficient  number  of  shares  of  Common  Stock
authorized  and reserved,  free from  preemptive  rights,  for conversion of the
outstanding  Series D Convertible  Preferred  Stock on the new basis.  If at any
time the number of authorized  but unissued  shares of Common Stock shall not be
sufficient to effect the conversion of all of the outstanding shares of Series D
Convertible  Preferred Stock, the Corporation promptly shall seek such corporate
action as may, in the  opinion of its  counsel,  be  necessary  to increase  its
authorized but unissued shares of Common Stock to such number of shares as shall
be sufficient for such purpose.

     In case of any  consolidation  or merger of the Corporation  with any other
corporation  (other than a wholly-owned  subsidiary of the Corporation) in which
the  Corporation  is not the  surviving  corporation,  or in case of any sale or
transfer of all or substantially all of the assets of the Corporation, or in the
case of any share exchange  pursuant to which all of the  outstanding  shares of
Common Stock are converted into other  securities or property,  the  Corporation
shall make appropriate  provision or cause  appropriate  provision to be made so
that  each  holder  of  shares of  Series D  Convertible  Preferred  Stock  then
outstanding  shall have the right  thereafter to convert such shares of Series D
Convertible  Preferred  Stock  into the kind and  amount  of shares of stock and
other securities and property receivable upon such consolidation,  merger, sale,
transfer,  or share exchange by a holder of the number of shares of Common Stock
into which such shares of Series D Convertible  Preferred  Stock could have been
converted immediately prior to the effective date of such consolidation, merger,
sale,   transfer,   or  share   exchange.   If,  in  connection  with  any  such


                                      -12-
<PAGE>

consolidation,  merger, sale, transfer, or share exchange, each holder of shares
of Common  Stock is entitled to elect to receive  either  securities,  cash,  or
other assets upon completion of such transaction,  the Corporation shall provide
or cause to be provided to each holder of Series D Convertible  Preferred  Stock
the right to elect the securities, cash, or other assets into which the Series D
Convertible  Preferred  Stock held by such  holder  shall be  convertible  after
completion  of any such  transaction  on the same terms and  subject to the same
conditions  applicable  to  holders  of the  Common  Stock  (including,  without
limitation,  notice of the right to elect,  limitations  on the  period in which
such  election  shall be  made,  and the  effect  of  failing  to  exercise  the
election).  The  Corporation  shall not effect any such  transaction  unless the
provisions of this paragraph have been complied with. The above provisions shall
similarly apply to successive  consolidations,  mergers,  sales,  transfers,  or
share exchanges.

     If a holder shall have given a notice of  conversion  of shares of Series D
Convertible Preferred Stock, upon surrender of certificates  representing shares
of Series D Convertible  Preferred Stock for conversion,  the Corporation  shall
issue and deliver to such person certificates for the Common Stock issuable upon
such conversion  within three business days after such surrender of certificates
and the  person  converting  shall be deemed  to be the  holder of record of the
Common Stock issuable upon such  conversion,  and all rights with respect to the
shares  surrendered  shall forthwith  terminate  except the right to receive the
Common Stock or other securities, cash, or other assets as herein provided.

     No  fractional  shares of Common Stock shall be issued upon  conversion  of
Series D Convertible  Preferred Stock but, in lieu of any fraction of a share of
Common  Stock which  would  otherwise  be  issuable in respect of the  aggregate
number of such shares surrendered for conversion at one time by the same holder,
the Corporation at its option (a) may pay in cash an amount equal to the product
of (i) the arithmetic average of the Closing Price of a share of Common Stock on
the three  consecutive  trading  days before the  Conversion  Date and (ii) such
fraction of a share or (b) may issue an additional share of Common Stock.

     The "Closing  Price" for each day shall be the closing price regular way on
such day as reported on the New York Stock Exchange  Composite  Tape, or, if the
Common  Stock is not listed or  admitted  to trading  on such  Exchange,  on the
principal  national  securities  exchange  on which  Common  Stock is  listed or
admitted  to trading,  or, if not listed or admitted to trading on any  national
securities  exchange,  the closing bid price as reported on the Nasdaq  National
Market (or, if not so  reported,  the closing  price),  or, if not  admitted for
quotation  on the Nasdaq  National  Market,  the average of the high bid and low
asked prices on such day as recorded by the National  Association  of Securities
Dealers,  Inc. through the National  Association of Securities Dealers Automated


                                      -13-
<PAGE>

Quotations  System  ("NASDAQ"),  or if the National  Association  of  Securities
Dealers,  Inc.  through  NASDAQ shall not have reported any bid and asked prices
for the Common  Stock on such day,  the average of the bid and asked  prices for
such day as furnished by any New York Stock  Exchange  member firm selected from
time to time by the Corporation for such purposes,  or, if no such bid and asked
prices can be obtained from any such firm, the fair market value of one share of
Common Stock on such day as  determined in good faith by the Board of Directors.
Such determination by the Board of Directors shall be conclusive.

     The  Conversion  Amount shall be adjusted  from time to time under  certain
circumstances,  subject to the  provisions  of the first three  sentences of the
first paragraph of this Section 9(c), as follows:

     (i) In case the  Corporation  shall issue  rights or warrants on a pro rata
basis to all holders of the Common Stock entitling such holders to subscribe for
or purchase  Common  Stock on the record  date  referred to below at a price per
share less than the average daily  Closing  Prices of the Common Stock on the 30
consecutive  business  days  commencing  45 business days before the record date
(the "Current  Market Price"),  then in each such case the Conversion  Amount in
effect on such record date shall be adjusted in accordance with the formula

         C1 = C x (O + N)/(O + (N x P)/M)

where

     C1   = the adjusted Conversion Amount 

     C    = the current Conversion Amount

     O    = the number of shares of Common Stock outstanding on the record date.

     N    = the number of additional shares of Common Stock issuable pursuant to
            the exercise of such rights or warrants.

     P    = the offering price per share of the additional  shares (which amount
            shall include  amounts  received by the  Corporation in  respect  of
            the issuance and the exercise of such rights or warrants).

     M    = the  Current  Market  Price per share of Common  Stock on the record
            date.

Such adjustment shall become effective immediately after the record date for the
determination  of stockholders  entitled to  receive  such  rights  or warrants.


                                      -14-
<PAGE>

If any or all such rights or warrants  are not so issued or expire or  terminate
before being exercised, the Conversion Amount then in effect shall be readjusted
appropriately.

     (ii) In case the Corporation shall, by dividend or otherwise, distribute to
all  holders of its  Junior  Stock (as  hereinafter  defined)  evidences  of its
indebtedness  or assets  (including  securities,  but  excluding any warrants or
subscription  rights referred to in  subparagraph  (i) above and any dividend or
distribution paid in cash out of the retained earnings of the Corporation), then
in each such case the  Conversion  Amount  then in effect  shall be  adjusted in
accordance with the formula

         C1 = C x  M(M - F)

where

     C1   = the adjusted Conversion Amount

     C    = the current Conversion Amount

     M    = the  Current  Market  Price per share of Common  Stock on the record
          date mentioned below.

     F    = the aggregate  amount of such cash  dividend  and/or the fair market
          value on the record date of the assets or securities to be distributed
          divided by the  number of shares of Common  Stock  outstanding  on the
          record date. The Board of Directors  shall  determine such fair market
          value, which determination shall be conclusive.

Such adjustment shall become effective immediately after the record date for the
determination of stockholders entitled to receive such dividend or distribution.
For purposes of this subparagraph  (ii),  "Junior Stock" shall include any class
of capital  stock  ranking  junior as to  dividends or upon  liquidation  to the
Series D Convertible Preferred Stock.

     (iii) All  calculations  hereunder  shall be made to the nearest cent or to
the nearest 1/100 of a share, as the case may be.

     (iv) If at any time as a result of an adjustment made pursuant to the fifth
paragraph of this Section 9(c), the holder of any Series D Convertible Preferred
Stock  thereafter  surrendered  for conversion  shall become entitled to receive
securities,  cash,  or assets other than Common  Stock,  the number or amount of
such securities or property so receivable  upon  conversion  shall be subject to


                                      -15-
<PAGE>

adjustment  from  time to time in a manner  and on terms  nearly  equivalent  as
practicable  to the  provisions  with respect to the Common  Stock  contained in
subparagraphs (i) to (iii) above.

     Except as otherwise  provided above in this Section 9, no adjustment in the
Conversion  Amount  shall  be  made  in  respect  of any  conversion  for  share
distributions  or  dividends  theretofore  declared  and paid or  payable on the
Common Stock.

     Whenever  the  Conversion  Amount  is  adjusted  as  herein  provided,  the
Corporation  shall  send to  each  transfer  agent,  if any,  for the  Series  D
Convertible  Preferred  Stock  and  the  Common  Stock,  and  to  the  principal
securities exchange,  if any, on which the Series D Convertible  Preferred Stock
and the Common Stock is traded,  or the Nasdaq  National  Market if the Series D
Convertible Preferred Stock or Common Stock is admitted for a quotation thereon,
a statement  signed by the  Chairman of the Board,  the  President,  or any Vice
President of the  Corporation and by its Treasurer or its Secretary or Assistant
Secretary stating the adjusted  Conversion Amount determined as provided in this
Section  9, and any  adjustment  so  evidenced,  given in good  faith,  shall be
binding upon all stockholders and upon the Corporation.  Whenever the Conversion
Amount is adjusted,  the Corporation  will give notice by mail to the holders of
record of Series D  Convertible  Preferred  Stock,  which  notice  shall be made
within 45 days after the effective  date of such  adjustment and shall state the
adjustment  and the  Conversion  Amount.  Notwithstanding  the foregoing  notice
provisions,  failure by the  Corporation to give such notice or a defect in such
notice  shall not  affect the  binding  nature of such  corporate  action of the
Corporation.

     Whenever the Corporation shall propose to take any of the actions specified
in the fifth paragraph of this Section 9(c) or in  subparagraphs  (i) or (ii) of
the ninth paragraph of this Section 9(c) which would result in any adjustment in
the  Conversion  Amount under this Section 9(c), the  Corporation  shall cause a
notice to be mailed at least 20 days prior to the date on which the books of the
Corporation  will close or on which a record will be taken for such  action,  to
the holders of record of the outstanding Series D Convertible Preferred Stock on
the date of such  notice.  Such notice shall  specify the action  proposed to be
taken by the  Corporation  and the date as of which  holders  of  record  of the
Common  Stock shall  participate  in any such actions or be entitled to exchange
their Common Stock for securities or other property, as the case may be. Failure
by the  Corporation  to mail the notice or any defect in such  notice  shall not
affect the validity of the transaction.

     Notwithstanding any other provision of this Section 9, no adjustment in the
Conversion   Amount  need  be  made  (a)  for  a  transaction   referred  to  in
subparagraphs (i) or (ii) of the ninth paragraph of this Section 9(c) if holders
of Series D Convertible Preferred Stock are to participate in the transaction or



                                      -16-
<PAGE>

distribution  on a basis and with notice that the Board of Directors  determines
such transaction to be fair to the holders of the Series D Convertible Preferred
Stock and appropriate in light of the basis on which holders of the Common Stock
or, in the case of a transaction  referred to in said subparagraph (ii), holders
of Junior Stock  participate in the  transaction;  (b) for sales of Common Stock
pursuant to a plan for reinvestment of dividends and interest, provided that the
purchase  price in any such sale is at least equal to the fair  market  value of
the Common Stock at the time of such  purchase,  or pursuant to any plan adopted
by the Corporation for the benefit of its employees,  directors, or consultants;
or (c) after such time as a holder of shares of Series D  Convertible  Preferred
Stock becomes  entitled to receive only cash upon  conversion of such shares (in
which case no  interest  shall  accrue on the amount of such cash for any period
prior  to  the  date  which  is  three  business  days  after  surrender  of the
certificates for such shares for conversion).

     (d) Mandatory Conversion. So long as the Corporation shall be in compliance
in all material  respects  with its  obligations  to the holders of the Series D
Convertible  Preferred Stock  (including its obligations  under the Registration
Rights Agreement and the provisions of this Certificate of Designations)  and so
long as the Registration Statement shall be effective,  on the date which is 730
days after the date the Registration Statement is first ordered effective by the
SEC (the "Mandatory  Conversion Date") all of the shares of Series D Convertible
Preferred  Stock then  outstanding  shall be converted,  in accordance  with the
provisions,  and subject to the  limitations,  of Section  9(a),  into shares of
Common Stock to the extent the same are at such time  convertible into shares of
Common Stock. On the Mandatory  Conversion  Date, the Corporation  shall mail by
first class mail or  otherwise  deliver to each  holder of Series D  Convertible
Preferred  Stock a notice (a "Section 9(d)  Notice"),  which shall state (1) the
number of shares of Series D  Convertible  Preferred  Stock held by such  holder
which have been  converted  into shares of Common Stock in accordance  with this
Section 9(d) and (2) the Mandatory  Conversion  Date. If the  Corporation  shall
give a Section 9(d) Notice, then, unless theretofore  converted by the holder in
accordance  herewith  or  redeemed  by the  Corporation,  and,  so  long  as the
Registration  Statement shall remain effective on the Mandatory  Conversion Date
and the  Corporation  shall be in compliance  in all material  respects with its
obligations  to  the  holders  of  the  Series  D  Convertible  Preferred  Stock
(including  its  obligations  under the  Registration  Rights  Agreement and the
provisions of this  Certificate  of  Designations)  on the Mandatory  Conversion
Date, on the Mandatory Conversion Date properly set forth therein, all shares of
Series D Convertible  Preferred Stock which on the Mandatory Conversion Date are
convertible in accordance with Section 9(a) hereof, shall be converted into such
number of shares of Common Stock as shall be determined pursuant to this Section
9 as if the  conversion  of such  number  of  shares  of  Series  D  Convertible
Preferred Stock were made by the holders  thereof in accordance  herewith and as


                                      -17-
<PAGE>

if the Mandatory Conversion Date were the Conversion Date. Upon the surrender of
certificates  for shares of Series D Convertible  Preferred  Stock by the holder
after a Section 9(d) Notice is given,  the  Corporation  shall issue and, within
three  trading days after such  surrender,  deliver to or upon the order of such
holder that number of shares of Common  Stock for the number of shares of Series
D  Convertible  Preferred  Stock  converted,  together  with  accrued and unpaid
dividends  thereon to the date of conversion and accrued and unpaid  interest on
dividends  on such  shares  which  are in  arrears,  as shall be  determined  in
accordance  herewith.  In connection  with any  conversion of shares of Series D
Convertible Preferred Stock pursuant to this Section 9(d), the Corporation shall
not have the right provided in Section 9(a) to redeem any portion of such shares
for cost in lieu of such conversion.

     (e) Conversion at Option of Corporation.  So long as the Corporation  shall
be in compliance in all material respects with its obligations to the holders of
the Series D Convertible  Preferred Stock  (including its obligations  under the
Registration  Rights  Agreement  and  the  provisions  of  this  Certificate  of
Designations)  and so long as the  Registration  Statement  required to be filed
under the  Registration  Rights  Agreement  shall be effective,  the Corporation
shall have the right,  exercisable  at any time after the date which is 360 days
after the Registration  Effective Date by at least 15 business days but not more
than 20 business days prior notice (a  "Corporation  Conversion  Notice") to the
holders of the Series D  Convertible  Preferred  Stock to require the holders of
the Series D Convertible  Preferred  Stock to convert,  in  accordance  with the
provisions,  and subject to the limitations,  of this Section 9, all or any part
of the outstanding shares of Series D Convertible Preferred Stock into shares of
Common Stock to the extent the same are at such time  convertible into shares of
Common Stock.  The Corporation  Conversion  Notice shall state (1) the number of
shares of Series D Convertible  Preferred Stock which the  Corporation  seeks to
require to be  converted  into shares of Common  Stock and (2) the date for such
conversion (the "Corporation  Conversion Date"). If the Corporation shall give a
Corporation  Conversion Notice, then, unless theretofore converted by the holder
or redeemed  by the  Corporation  in  accordance  herewith,  and, so long as the
Registration Statement shall remain effective on the Corporation Conversion Date
and the  Corporation  shall be in compliance  in all material  respects with its
obligations  to  the  holders  of  the  Series  D  Convertible  Preferred  Stock
(including  its  obligations  under the  Registration  Rights  Agreement and the
provisions of this  Certificate of  Designations)  on the Conversion  Date, such
shares of Series D Convertible  Preferred  Stock subject to this provision shall
be converted  into such number of shares of Common Stock as shall be  determined
pursuant  to this  Section 9 as if the  conversion  of such  number of shares of
Series D  Convertible  Preferred  Stock  were  made by the  holders  thereof  in
accordance  herewith  without any  further  action on the part of the holders of
such  shares  of Series D  Convertible  Preferred  Stock.  Upon  receipt  by the


                                      -18-
<PAGE>

Corporation of certificates  for shares of Series D Convertible  Preferred Stock
converted into shares of Common Stock in accordance with this Section 9(e) after
a  Corporation  Conversion  Notice is given,  the  Corporation  shall issue and,
within three trading days after such surrender,  deliver to or upon the order of
such holder (1) that  number of shares of Common  Stock for the number of shares
of Series D Convertible  Preferred  Stock  converted,  together with accrued and
unpaid  dividends  thereon  to the date of  conversion  and  accrued  and unpaid
interest  on  dividends  on such  shares  which  are in  arrears,  as  shall  be
determined in accordance  herewith and (2) a new  certificate for the balance of
shares of Series D Convertible  Preferred  Stock, if any. In connection with any
conversion of shares of Series D Convertible  Preferred  Stock  pursuant to this
Section 9(e), the Corporation  shall not have the right provided in Section 9(a)
to redeem any portion of such shares for cash in lieu of such conversion.

     (f)  Conversion  Into Units.  Notwithstanding  any other  provision  to the
contrary  contained  herein,  if, at the time of any conversion  pursuant to any
provision  of this  Section 9 the  Common  Stock is not  trading  on the  Nasdaq
SmallCap Market ("Nasdaq")  separate from units ("Units" ), each Unit consisting
of one share of Common  Stock and one Class A Redeemable  Common Stock  Purchase
Warrant to  purchase  one share of Common  Stock  (the  "Common  Stock  Purchase
Warrants"),  then upon any such  conversion,  in lieu of  issuance  of shares of
Common Stock,  the Company shall issue a number of Units  determined as provided
in this Section 9(f). Any Common Stock Purchase  Warrant issued upon  conversion
of shares of Series D Convertible Preferred Stock issued pursuant to the Warrant
Agreement,   dated  November  2,  1995,  by  and  between  the  Corporation  and
Continental  Stock  Transfer & Trust  Company,  as Warrant  Agent (the  "Warrant
Agreement"),  shall be in the form specified in the Warrant Agreement. If at any
time shares of Series D Convertible  Preferred  Stock shall be convertible  into
Units as provided in this Section 9(f), then the number of Units to be issued on
conversion  of each  share of  Series D  Convertible  Preferred  Stock  shall be
determined based on the Closing Price of the Units. All other provisions of this
Section 9 relating to  conversion  of shares of Series D  Convertible  Preferred
Stock shall be applicable to the Units as if they were shares of Common Stock.

     Section 10. Voting Rights.  Except as otherwise  required by law, shares of
Series D  Convertible  Preferred  Stock  shall  not be  entitled  to vote on any
matter. 

     The  affirmative  vote or  consent  of the  holders  of a  majority  of the
outstanding  shares  of  the  Series  D  Convertible   Preferred  Stock,  voting
separately as a class,  will be required for (1) any amendment,  alteration,  or
repeal,  whether by merger or consolidation or otherwise,  of the  Corporation's
Certificate of Incorporation if the amendment,  alteration, or repeal materially
and adversely affects the powers, preferences, or special rights of the Series D


                                      -19-
<PAGE>

Convertible  Preferred  Stock,  or (2) the  creation  and issuance of any Senior
Dividend Stock or Senior Liquidation Stock; provided, however, that any increase
in the  authorized  preferred  stock  of the  Corporation  or the  creation  and
issuance of any stock which is both Junior Dividend Stock and Junior Liquidation
Stock or any other capital stock of the Corporation ranking on a parity with the
Series D Convertible  Preferred  Stock shall not be deemed to affect  materially
and adversely such powers, preferences, or special rights.

     Section  11.  Outstanding  Shares.  For  purposes  of this  Certificate  of
Designations, all shares of Series D Convertible Preferred Stock shall be deemed
outstanding  except (i) from the date of surrender of certificates  representing
shares of Series D Convertible Preferred Stock for conversion into Common Stock,
all shares of Series D Convertible  Preferred Stock converted into Common Stock;
(ii)  from  the  date of  registration  of  transfer,  all  shares  of  Series D
Convertible  Preferred Stock held of record by the Corporation or any subsidiary
or  Affiliate  (as  defined  herein)  of the  Corporation  and  (iii)  from  the
Redemption  Date, all shares of Series D Convertible  Preferred  Stock which are
redeemed,  so long as in each case the Redemption Price of such shares of Series
D Convertible  Preferred  Stock shall have been paid by the  Corporation  as and
when required  hereby.  For the purposes of this  Certificate  of  Designations,
"Affiliate" means any person directly or indirectly controlling or controlled by
or under direct or indirect  common control with the  Corporation.  "Control" is
the power to direct the management and policies of a person, directly or through
one or more intermediaries,  whether through the ownership of voting securities,
by contract, or otherwise.

                                      -20-


<PAGE>

     IN WITNESS  WHEREOF,  Hemispherx  BioPharma,  Inc. has caused its corporate
seal to be  hereunto  affixed  and this  certificate  to be signed by William A.
Carter, M.D., its President, this 3rd day of July, 1996.

                                                HEMISPHERX BIOPHARMA, INC.

                                                By  s/William A.Carter      
                                                  -----------------------------
                                                      William A. Carter 

                                      -21-




               [LETTERHEAD OF SILVERMAN, COLLURA & CHERNIS, P.C.]



                                                                   July 26, 1996

Hemispherx Biopharma, Inc.
1617 JFK Boulevard
Philadelphia, Pennsylvania 19103

         Re:  Registration Statement on Form S-1

Gentlemen:

         We have acted as counsel to Hemispherx Biopharma, Inc. (the "Company"),
a Delaware  corporation,  pursuant to a  Registration  Statement on Form S-1, as
filed  with  the  Securities  and  Exchange  Commission  on July 26,  1996  (the
"Registration Statement"),  covering 2,770 shares of the Company's Common Stock,
$.001 par value (the "Common Stock"),  890,543 shares of Common Stock underlying
Common Stock Purchase  Warrants (the  "Warrants") and 2,427,275 shares of Common
Stock underlying  Series D Preferred Stock (the "Preferred  Stock").  The Common
Stock,  Warrants  and  Preferred  Stock  are  hereinafter  referred  to  as  the
"Securities".

         In acting as counsel for the Company  and  arriving at the  opinions as
expressed below, we have examined and relied upon originals or copies, certified
or otherwise  identified  to our  satisfaction,  of such records of the Company,
agreements and other instruments,  certificates of officers and  representatives
of the Company,  certificates of public officials and other documents as we have
deemed necessary or appropriate as a basis for the opinions expressed herein.

         In connection  with our  examination we have assumed the genuineness of
all signatures,  the authenticity of all documents  tendered to us as originals,
the legal capacity of natural  persons and the conformity to original  documents
of all documents submitted to us as certified or photostated copies.

         Based  on  the  foregoing,   and  subject  to  the  qualifications  and
limitations set forth herein, it is our opinion that:

         1.  The Company has authority to issue the Securities in the manner and
under the terms set forth in the Registration Statement.


<PAGE>

SILVERMAN, COLLURA & CHERNIS, P.C.

Hemispherx Biopharama, Inc.
July 26, 1996
Page 2


         2. The Securities have been duly authorized and when issued,  delivered
and paid for  in  accordance  with their  respective  terms,  will  be   validly
issued, fully paid and non-assessable.

         We express no opinion  with respect to the laws other than those of the
State of New York and  Federal  Laws of the  United  States of  America,  and we
assume on responsibility as to the applicability thereto, the effect thereon, of
the laws of any other jurisdiction.

         We hereby  consent to the filing of this  opinion as Exhibit 5.1 to the
Registration Statement and its use as part of the Registration Statement.

         We are furnishing this opinion to the Company solely for its benefit in
connection with the Registration  Statement.  It is not to be used,  circulated,
quoted or otherwise referred to for any other purpose. Other than the Company no
one is entitled to reply on this opinion.

                                Very truly yours,

                                           SILVERMAN, COLLURA & CHERNIS, P.C.

                                           s\ Silverman, Collura & Chernis, P.C.





                             SUBSCRIPTION AGREEMENT
                          (GFL Advantage Fund Limited)

         THIS  SUBSCRIPTION  AGREEMENT,  dated as of the date of acceptance  set
forth below, by and between HEMISPHERx BIOPHARMA,  INC., a Delaware corporation,
with  headquarters  located at 1617 JFK Boulevard,  Philadelphia,  Pennsylvania,
19103 (the "Company"), and the undersigned (the "Buyer").

                              W I T N E S S E T H:

         WHEREAS,  the Company and the Buyer are executing and  delivering  this
Agreement in reliance upon the exemption from securities  registration  afforded
by Rule 506 of  Regulation  D as  promulgated  by the  Securities  and  Exchange
Commission  (the "SEC") under the  Securities Act of 1933, as amended (the "1933
Act"); and

         WHEREAS,  the Buyer wishes to  purchase,  upon the terms and subject to
the conditions of this Agreement,  shares of non-voting,  convertible  preferred
stock of the Company  which will be  convertible  into  shares of Common  Stock,
$.001 par value (the "Common  Stock") or units (the "Units" ) consisting  of one
Class A Redeemable Common Stock Purchase Warrant (the "Class A Warrant") and one
share of Common  Stock (the "Unit  Share"),  and, in  connection  therewith,  to
receive  warrants  to  purchase  100,000  shares of  Common  Stock,  subject  to
acceptance of this Agreement by the Company;

         NOW  THEREFORE,  in  consideration  of  the  premises  and  the  mutual
covenants  contained  herein  and other  good and  valuable  consideration,  the
receipt and sufficiency of which are hereby  acknowledged,  the parties agree as
follows:

         1. AGREEMENT TO SUBSCRIBE; PURCHASE PRICE; WARRANTS.

         a. Subscription and Warrants. The undersigned hereby agrees to purchase
from the  Company  the number of shares  (the  "Preferred  Shares")  of Series D
Convertible  Preferred  Stock,  $.01 par value (the "Preferred  Stock"),  of the
Company set forth on the signature page of this Agreement,  having the terms and
conditions  as set forth in the form of  Certificate  of  Designations  attached
hereto as Annex I (the "Certificate of Designations") at the price per share and
for the  aggregate  purchase  price  set  forth  on the  signature  page of this
Agreement.  The  purchase  price for the  Preferred  Shares  shall be payable in
United States  Dollars.  The shares of Common Stock issuable upon  conversion of
the Preferred Stock and the Unit Shares comprising a part of a Unit are referred
to herein  as the  "Conversion  Shares."  In  addition  to the  issuance  of the
Preferred  Shares,  the Company shall issue to the Buyer on the Closing Date (as
herein  defined)  warrants  to purchase  100,000  shares of Common  Stock,  such
warrants to be in the form  attached  hereto as Annex II (the  "Warrants").  The
shares of Common Stock  issuable  upon  exercise of the Warrants and the Class A
Warrants are referred to herein as the "Warrant  Shares." The Conversion  Shares

<PAGE>

and the  Warrant  Shares are  referred  to herein  collectively  as the  "Common
Shares."  The Common  Shares and the  Preferred  Shares are  referred  to herein
collectively  as the  "Shares."  The  Shares,  the  Units and the  Warrants  are
referred to herein collectively as the "Securities."

         b. Form of  Payment.  The Buyer  shall pay the  purchase  price for the
Preferred Shares by delivering good funds in United States Dollars to the escrow
agent (the "Escrow Agent") identified in the Joint Escrow Instructions  attached
hereto as Annex III (the "Joint  Escrow  Instructions").  Such delivery of funds
shall be made  against  delivery  by the  Company  of the  certificates  for the
Preferred Shares registered in the name of the Buyer. Promptly following payment
by the Buyer to the Escrow Agent of the purchase price of the Preferred  Shares,
but in no  event  later  than  the  Closing  Date,  the  Company  shall  deliver
certificates for the Preferred  Shares,  registered in the name of the Buyer, to
the Escrow  Agent.  By signing  this  Agreement,  the Buyer and the Company each
agrees to all of the terms and  conditions of, and becomes a party to, the Joint
Escrow  Instructions,  all of the provisions of which are incorporated herein by
this reference as if set forth in full.

         c. Method of Payment.  Payment of the purchase  price for the Preferred
Shares shall be made by wire transfer of funds to:

             Citibank, N.A.
             153 East 53rd Street
             New York, New York 10043

             ABA#021000089
             For Further Credit to A/C#37179446
             for credit to the account of Brian W. Pusch Attorney Escrow Account
             Reference:  GFL/Hemispherx

Not later than 4:00 p.m.,  New York City time, on the date which is one New York
Stock Exchange  trading day after the Company shall have accepted this Agreement
and returned a signed  counterpart  of this  Agreement  to the Buyer,  the Buyer
shall  deposit  with the  Escrow  Agent  the  aggregate  purchase  price for the
Preferred Shares.

         2. BUYER  REPRESENTATIONS,  WARRANTIES,  ETC.;  ACCESS TO  INFORMATION;
INDEPENDENT INVESTIGATION.

         The Buyer  represents  and warrants to, and  covenants and agrees with,
the Company as follows:

         a. The Buyer is  purchasing  the  Preferred  Shares and  acquiring  the
Warrants for its own account for investment only and not with a view towards the
public sale or distribution thereof;

                                      -2-
<PAGE>

         b. The Buyer is an  "accredited  investor"  as that term is  defined in
Rule 501 of the General  Rules and  Regulations  under the 1933 Act by reason of
Rule 501(a)(3);

         c. All subsequent offers and sales of the Securities by the Buyer shall
be made pursuant to registration of the Securities  being offered and sold under
the 1933 Act or pursuant to an exemption from registration;

         d. The Buyer understands that the Preferred Shares and the Warrants are
being offered and sold, and the Common Shares and Units are being offered, to it
in reliance on specific exemptions from the registration  requirements of United
States  federal and state  securities  laws and that the Company is relying upon
the truth and accuracy of, and the Buyer's compliance with, the representations,
warranties,  agreements,  acknowledgments  and  understandings  of the Buyer set
forth herein in order to determine the  availability  of such exemptions and the
eligibility of the Buyer to acquire the Preferred Shares and the Warrants and to
receive an offer of the Common Shares and the Units;

         e. The Buyer and its  advisors,  if any, have been  furnished  with all
materials  relating to the business,  finances and operations of the Company and
materials  relating  to the  offer  and  sale of the  Preferred  Shares  and the
Warrants  and the offer of the Common  Shares  which have been  requested by the
Buyer. The Buyer and its advisors, if any, have been afforded the opportunity to
ask questions of the Company and have received complete and satisfactory answers
to any such  inquiries.  Without  limiting the generality of the foregoing,  the
Buyer has had the  opportunity  to obtain and to review the Company's (1) Annual
Report on Form 10-K for the fiscal year ended  December 31, 1995,  (2) Quarterly
Report on Form 10-Q for the  fiscal  quarter  ended  March 31,  1996 and (3) the
Company's   definitive   Proxy   Statement  for  its  1996  Annual   Meeting  of
Stockholders, in each case as filed with the SEC. The Buyer understands that its
investment in the Shares involves a high degree of risk;

         f. The Buyer  understands that no United States federal or state agency
or any  other  government  or  governmental  agency  has  passed  on or made any
recommendation or endorsement of the Securities;

         g. This  Agreement has been duly and validly  authorized,  executed and
delivered  on behalf of the Buyer and is a valid and  binding  agreement  of the
Buyer enforceable in accordance with its terms,  subject as to enforceability to
general principles of equity and to bankruptcy, insolvency, moratorium and other
similar laws affecting the enforcement of creditors' rights generally; and

         h. The Buyer is not purchasing the Preferred  Shares for the purpose of
covering any short sale of the Common Stock,  put option  relating to the Common
Stock or other certificate or instrument with the Conversion Shares.

                                      -3-
<PAGE>

         3. COMPANY REPRESENTATIONS, ETC.

         The Company represents and warrants to the Buyer that:

         a. Concerning the Securities.  The Securities have been duly authorized
and the  Preferred  Shares,  when  issued and paid for in  accordance  with this
Agreement,  and the Common Shares,  when issued upon conversion of the Preferred
Shares or exercise of the Warrants or Class A Warrants, as the case may be, will
be duly and validly issued,  fully paid and  non-assessable and will not subject
the holder thereof to personal  liability by reason of being such holder.  There
are no preemptive rights of any stockholder of the Company,  as such, to acquire
any of the  Securities.  The Units are listed for trading on the Nasdaq SmallCap
Market  ("Nasdaq")  and (1) the  Company  and the Units  meet the  criteria  for
continued  listing and trading on Nasdaq;  (2) the Company has not been notified
since January 1, 1994 by the National Association of Securities Dealers, Inc. of
any failure or potential  failure to meet the criteria for continued listing and
trading  on Nasdaq and (3) no  suspension  of trading in the Units is in effect.
The Company has no reason to believe  that the Common  Stock will be  ineligible
for listing on Nasdaq or that it will fail to become  listed on Nasdaq within 30
days from the Closing Date as required by Section 4(e) hereof.

         b. Subscription  Agreement;  Registration  Rights Agreement;  Warrants;
Units. This Agreement,  the Registration Rights Agreement,  the form of which is
attached hereto as Annex IV (the "Registration  Rights  Agreement"),  the Units,
the Warrant Agreement dated November 2, 1995 between the Company and Continental
Stock Transfer & Trust Company, as Warrant Agent (the "Warrant Agreement"),  and
the  Warrants  have  been  duly and  validly  authorized  by the  Company,  this
Agreement has been duly executed and delivered on behalf of the Company and this
Agreement and the Warrant  Agreement are and the Registration  Rights Agreement,
the Units and the Warrants, when executed and delivered by the Company, will be,
valid and binding agreements of the Company enforceable in accordance with their
respective terms,  subject as to enforceability to general  principles of equity
and to bankruptcy,  insolvency,  moratorium and other similar laws affecting the
enforcement of creditors' rights generally.

         c.  Non-contravention.  The execution and delivery of this Agreement by
the Company and the  consummation  by the Company of the  issuance of the Shares
and the Warrants and the other transactions  contemplated by this Agreement, the
Registration Rights Agreement and the terms of the Preferred Stock, the Warrants
and the  Units do not and will not  conflict  with or  result in a breach by the
Company of any of the terms or provisions of, or constitute a default under, the
certificate  of  incorporation  or by-laws  of the  Company,  or any  indenture,

                                      -4-
<PAGE>

mortgage,  deed of trust or other material  agreement or instrument to which the
Company is a party or by which it or any of its  properties or assets are bound,
or any applicable law, rule or regulation or any applicable decree,  judgment or
order  of  any  court,   United  States  federal  or  state   regulatory   body,
administrative  agency or other  governmental body having  jurisdiction over the
Company or any of its properties or assets.

         d.  Approvals.  No  authorization,  approval  or  consent of any court,
governmental body,  regulatory agency,  self-regulatory  organization,  or stock
exchange or market or the stockholders of the Company is required to be obtained
by the  Company  for the  issuance  and sale of the Shares and the  Warrants  as
contemplated by this Agreement, the Preferred Stock, the Units and the Warrants.

         e. Information  Provided.  The information  provided by or on behalf of
the Company to the Buyer and referred to in Section 2(e) of this  Agreement does
not  contain  any  untrue  statement  of a  material  fact or omit to state  any
material fact necessary in order to make the statements therein, in the light of
the circumstance under which they are made, not misleading.

         f. Absence of Certain Changes.  Since December 31, 1995, there has been
no material adverse change and no material adverse  development in the business,
properties,  operations, financial condition, results of operations or prospects
of the Company, except as disclosed in the documents referred to in Section 2(e)
hereof.

         g. Absence of Litigation. There is no action, suit, proceeding, inquiry
or investigation before or by any court, public board or body pending or, to the
knowledge  of the  Company  or any of its  subsidiaries,  threatened  against or
affecting  the  Company  or any  of its  subsidiaries,  wherein  an  unfavorable
decision,  ruling  or  finding  would  have a  material  adverse  effect  on the
properties,  business,  condition (financial or other), results of operations or
prospects  of  the  Company  and  its  subsidiaries  taken  as a  whole  or  the
transactions contemplated by this Agreement or any of the documents contemplated
hereby or which would adversely affect the validity or enforceability of, or the
authority  or ability of the  Company to perform  its  obligations  under,  this
Agreement or any of such other documents.

         4. CERTAIN COVENANTS AND ACKNOWLEDGMENTS.

         a. Transfer Restrictions. The Buyer acknowledges that (1) the Preferred
Shares and the  Warrants  have not been and are not being  registered  under the
provisions of the 1933 Act and,  except as provided in the  Registration  Rights
Agreement,  the Common Shares have not been and are not being  registered  under
the 1933 Act,  and may not be  transferred  unless (A)  subsequently  registered
thereunder  or (B) the Buyer shall have  delivered  to the Company an opinion of
counsel, reasonably satisfactory in form, scope and substance to the Company, to

                                      -5-
<PAGE>

the effect that the Warrants or the Shares to be sold or transferred may be sold
or transferred pursuant to an exemption from such registration;  (2) any sale of
the Shares or the Warrants  made in reliance on Rule 144  promulgated  under the
1933 Act may be made only in accordance with the terms of said Rule and further,
if said Rule is not  applicable,  any resale of such  Shares or  Warrants  under
circumstances in which the seller,  or the person through whom the sale is made,
may be deemed to be an  underwriter,  as that term is used in the 1933 Act,  may
require compliance with some other exemption under the 1933 Act or the rules and
regulations  of the SEC  thereunder;  and (3)  neither the Company nor any other
person is under any  obligation  to register the Shares  (other than pursuant to
the  Registration  Rights  Agreement)  or the Warrants  under the 1933 Act or to
comply with the terms and  conditions  of any exemption  thereunder  (other than
pursuant  to  Section  4(d)  hereof  and  pursuant  to the  Registration  Rights
Agreement).

         b.  Restrictive  Legend.  The Buyer  acknowledges  and agrees  that the
certificates for the Preferred Shares, the Warrants, and, until such time as the
Common Shares have been  registered  under the 1933 Act as  contemplated  by the
Registration Rights Agreement,  the certificates for the Common Shares, may bear
a restrictive  legend in  substantially  the following form (and a stop-transfer
order may be placed against  transfer of the certificates for the Shares and the
Warrants):

          The  securities   represented  by  this   certificate  have  not  been
          registered  under  the  Securities  Act  of  1933,  as  amended.   The
          securities  have been  acquired  for  investment  and may not be sold,
          transferred  or assigned in the absence of an  effective  registration
          statement  for the  securities  under the  Securities  Act of 1933, as
          amended,  or an opinion of counsel that  registration  is not required
          under said Act.

         c.  Registration  Rights  Agreement.  The parties hereto agree to enter
into the Registration Rights Agreement on or before the Closing Date.

         d.  Form D. The  Company  agrees to file a Form D with  respect  to the
Shares as required under Regulation D and to provide a copy thereof to the Buyer
promptly  after such filing.  The Buyer agrees to cooperate  with the Company in
connection  with such filing and,  upon request of the  Company,  to provide all
information relating to the Buyer required for such filing.

         e. Authorization for Trading; Reporting Status. Within 30 days from the
Closing Date,  the Company  shall cause the Common  Shares to be authorized  for
trading on Nasdaq.  So long as the Buyer  beneficially owns any of the Preferred
Shares, the Warrants, the Units or the Common Shares, the Company shall file all
reports required to be filed with the SEC pursuant to Section 13 or 15(d) of the
Securities  Exchange Act of 1934,  as amended (the "1934 Act"),  and the Company

                                      -6-
<PAGE>

shall not terminate  its status as an issuer  required to file reports under the
1934 Act even if the 1934 Act or the  rules  and  regulations  thereunder  would
permit such termination.

         f. Use of Proceeds.  The Company will use the proceeds from the sale of
the Preferred Shares and the exercise of the Warrants for the Company's internal
working capital purposes.

         g. Blue Sky Laws. On or before the Closing Date, the Company shall take
such action as shall be necessary to qualify, or to obtain an exemption for, the
Preferred  Shares  and the  Warrants  for  sale to the  Buyer  pursuant  to this
Agreement  and the  Common  Shares  for sale to the Buyer on  conversion  of the
Preferred  Shares and  comprising  a portion of the Units and on exercise of the
Warrants and Class A Warrants under such of the securities or "blue sky" laws of
jurisdictions  in the United  States as shall be  applicable  to the sale of the
Preferred  Shares and  Warrants  to the Buyer  pursuant to this  Agreement,  the
issuance of the Common Shares to the Buyer on conversion of the Preferred Shares
and  comprising  a portion of the Units and exercise of the Warrants and Class A
Warrants. The Company shall furnish copies of all filings, applications,  orders
and grants or confirmations  of exemptions  relating to such securities or "blue
sky" laws on or prior to the Closing Date.

         h. Certain  Expenses.  If the closing occurs,  the Company shall pay or
reimburse the Buyer for all reasonable legal fees and expenses of counsel to the
Buyer for the preparation and negotiation of, and closing under,  this Agreement
(but not to exceed $10,000). The obligations of the Company under the provisions
of this Section 4(g) shall be in addition to the  obligation  of the Company for
expenses under the Registration Rights Agreement.

         i. Certain Trading  Restrictions.  The Buyer agrees that,  prior to the
conversion in full or redemption of all Preferred Shares owned by the Buyer, the
Buyer shall not engage in short sales or other similar transactions with respect
to the Common  Stock  other  than in the  ordinary  course of selling  shares of
Common Stock in connection with conversions of shares of Preferred Stock.

         j. Proxy  Appointment.  Effective on the  acquisition of any Conversion
Shares,  the Buyer shall  irrevocably  appoint  William A. Carter,  M.D.,  Chief
Executive  Officer and Chairman of the Board of the Company,  with full power of
substitution,  as the Buyer's  attorney-in-fact to vote all Conversion Shares in
the name of the Buyer on the  records  of the  Company on any matter to be voted
upon by the  stockholders of the Company,  other than any matter with respect to
which the holders of Common Stock are entitled under the General Corporation Law
of the State of Delaware,  to exercise  dissenters'  rights of  appraisal,  such
proxy to terminate on the earliest of (1) the date on which the aggregate market

                                      -7-
<PAGE>

capitalization  of the  outstanding  shares  of  Common  Stock  shall  have been
$300,000,000  or more for 20 consecutive  trading days, (2) the date the Company
shall have  received a bona fide offer  relating to a merger,  consolidation  or
other  acquisition of the Company or its assets, or a tender offer for shares of
the Common Stock which,  if consummated,  would value the outstanding  shares of
Common  Stock  at  $300,000,000  or more or (3) such  date as shall be  required
pursuant to Section 14(a) of the 1934 Act and the rules and  regulations  of the
SEC  thereunder.  On or before the Closing Date,  the Buyer shall deliver to the
Company an Irrevocable Proxy in the form attached hereto as Annex V. In no event
shall such proxy  restrict  the sale by the Buyer of any  Conversion  Shares and
upon any bona fide sale by the Buyer of Conversion  Shares for value, such proxy
shall terminate as to the Conversion Shares so sold.

         5. TRANSFER AGENT INSTRUCTIONS; CONVERSION PROCEDURE.

         a. Transfer Agent Instructions.  Promptly following the delivery by the
Buyer of the aggregate  purchase  price for the  Preferred  Shares in accordance
with  Section  1(c)  hereof,  and prior to the  Closing  Date the  Company  will
irrevocably  instruct its transfer  agent to issue  certificates  for the Common
Shares from time to time upon conversion of the Preferred Shares and exercise of
the  Warrants in such  amounts as  specified  from time to time to the  transfer
agent  in the  Conversion  Certificates  surrendered  in  connection  with  such
conversions  and  referred  to in  Section  5(b)  of  this  Agreement  or in the
subscription  forms  attached  to  the  Warrants,  as  the  case  may  be,  such
certificates  to bear the restrictive  legend  specified in Section 4(b) of this
Agreement  prior to  registration  of the  Common  Shares  under  the 1933  Act,
registered in the name of the Buyer or its nominee and in such  denominations to
be  specified  by the  Buyer in  connection  with  each  Unit or  conversion  of
Preferred  Shares or  exercise  of  Warrants,  as the case may be.  The  Company
warrants that no instruction  other than such  instructions  referred to in this
Section 5 and stop transfer  instructions  to give effect to Section 4(a) hereof
prior to  registration  of the Common Shares under the 1933 Act will be given by
the Company to the transfer agent and that the Common Shares shall  otherwise be
freely transferable on the books and records of the Company as and to the extent
provided in this Agreement. Nothing in this Section 5(a) shall affect in any way
the Buyer's  obligations and agreement to comply with all applicable  securities
laws upon  resale of the  Shares.  If the Buyer  provides  the  Company  with an
opinion of counsel  reasonably  satisfactory in form, scope and substance to the
Company that  registration  of a resale by the Buyer of any of the Securities in
accordance  with clause (1)(B) of Section 4(a) of this Agreement is not required
under the 1933 Act (which opinion expressly states that it may be relied upon by
the Company and its counsel in delivering instructions to the Company's transfer
agent),  the Company  shall permit the transfer of such  Securities  and, in the
case of the Common Shares, promptly, but in no event later than three days after
receipt of such opinion,  instruct the Company's  transfer agent to issue one or

                                      -8-
<PAGE>

more share  certificates in such name and in such  denominations as specified by
the Buyer. The provisions of Section 3(n) of the  Registration  Rights Agreement
shall supersede this Section 5(a) once said Section 3(n) becomes applicable.

         b. Conversion Procedure.  In connection with the exercise of conversion
rights  relating to the Preferred  Shares,  if the Common  Shares  issuable upon
conversion of the Preferred  Shares have not been registered  under the 1933 Act
prior to such  conversion,  the Buyer or any subsequent  holder of the Preferred
Shares shall, in addition to any other  requirement  imposed by the terms of the
Preferred Shares as set forth in the Certificate of Designation,  complete, sign
and furnish to the Company a conversion  certificate in the form attached hereto
as Annex VI.

         6. STOCK DELIVERY INSTRUCTIONS.

         The  certificates  for the  Preferred  Shares  and  Warrants  shall  be
delivered by the Company to the Escrow Agent  pursuant to Section 1(b) hereof on
a delivery against payment basis at the closing.

         7. CLOSING DATE.

         The date and time of the issuance and sale of the Preferred  Shares and
issuance of Warrants  (the  "Closing  Date") shall be 12:00 noon,  New York City
time, on the date which is three New York Stock Exchange  trading days after the
date on which the Buyer  has  deposited  the  purchase  price for the  Preferred
Shares with the Escrow Agent in  accordance  with  Section 1(c) hereof,  or such
other  mutually  agreed to time.  The closing shall occur on the Closing Date at
the offices of the Escrow Agent.

         8. CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL AND ISSUE.

         The  Buyer  understands  that  the  Company's  obligations  to sell the
Preferred Shares to the Buyer and to issue the Warrants to the Buyer pursuant to
this Agreement is conditioned upon:

         a. The  receipt and  acceptance  by the  Company of this  Agreement  as
evidenced  by  execution  of this  Agreement  by the Company and  delivery of an
executed counterpart of this Agreement to the Buyer or its legal counsel;

         b.  Delivery by the Buyer to the Escrow  Agent of good funds as payment
in full of an amount equal to the  purchase  price for the  Preferred  Shares in
accordance with Section 1(c) hereof; and

         c.  The  accuracy  on  the  Closing  Date  of the  representations  and
warranties  of the Buyer  contained in this  Agreement as if made on the Closing
Date and the  performance  by the Buyer on or  before  the  Closing  Date of all

                                      -9-
<PAGE>

covenants and agreements of the Buyer required to be performed on or before such
Closing Date.

         9. CONDITIONS TO THE BUYER'S OBLIGATION TO PURCHASE.

         The Company  understands  that the Buyer's  obligation  to purchase the
Preferred  Shares and to acquire the Warrants on the Closing Date is conditioned
upon:

         a. Delivery by the Company to the Escrow Agent of the  certificates for
the Preferred Shares and the Warrants in accordance with this Agreement;

         b.  The  accuracy  on  the  Closing  Date  of the  representations  and
warranties of the Company  contained in this Agreement as if made on the Closing
Date and the  performance  by the Company on or before the  Closing  Date of all
covenants and  agreements  of the Company  required to be performed on or before
such Closing Date; and

         c.  Receipt by the Buyer on the  Closing  Date of an opinion of counsel
for the Company, dated the Closing Date, in form, scope and substance reasonably
satisfactory to the Buyer, to the effect set forth in Annex VII attached hereto.

         10. GOVERNING LAW;  MISCELLANEOUS.  This Agreement shall be governed by
and  interpreted  in  accordance  with the  laws of the  State  of New  York.  A
facsimile transmission of this signed Agreement bearing a signature on behalf of
a party  hereto  shall be legal and binding on such party.  The headings of this
Agreement are for convenience of reference and shall not form part of, or affect
the interpretation of, this Agreement.  If any provision of this Agreement shall
be  invalid  or   unenforceable   in  any   jurisdiction,   such  invalidity  or
unenforceability  shall  not  affect  the  validity  or  enforceability  of  the
remainder of this Agreement or the validity or  enforceability of this Agreement
in any other  jurisdiction.  This Agreement may be amended only by an instrument
in  writing  signed by the party to be charged  with  enforcement.  Any  notices
required or  permitted  to be given under the terms of this  Agreement  shall be
sent by  mail or  delivered  personally  (which  shall  include  telephone  line
facsimile  transmission)  or by courier and shall be  effective  five days after
being placed in the mail, if mailed, or upon receipt, if delivered personally or
by courier,  in each case addressed to a party at such party's  address shown in
the introductory paragraph or on the signature page of this Agreement (facsimile
number 215-988-1739,  in the case of the Company, and 703-834-6627,  in the case
of the Buyer) or such other  address as a party shall have provided by notice to
the other party in accordance  with this provision and, in the case of notice to
the Company, with a copy to Silverman,  Collura & Chernis, P.C., 381 Park Avenue
South, 16th Floor, New York, New York 10016,  Attention:  Michael Freedman, Esq.
(facsimile number  212-779-8858) and, in the case of notice to the Buyer, with a

                                      -10-
<PAGE>

copy to Law Offices of Brian W Pusch,  Penthouse Suite, 29 West 57th Street, New
York,  New  York  10019  (facsimile  number  212-980-7055).   The  Buyer  hereby
designates  as its address for any notice  required or  permitted to be given to
the Buyer  pursuant  to the  Certificate  of  Designations  the  following:  GFL
Advantage Fund Limited, c/o Genesee Advisers,  12007 Sunrise Valley Drive, Suite
460, Reston,  Virginia 22091 (facsimile  number  703-476-7711),  until the Buyer
shall designate another address for such purpose. The Buyer shall have the right
to assign it rights and  obligations  under this  Agreement  with respect to the
purchase of all or any portion of the  Preferred  Shares and Warrants to another
investment fund, provided such assignee,  by written instrument duly executed by
such assignee,  assumes all  obligations of the Buyer  hereunder with respect to
the purchase of the portion of the Preferred Shares and Warrants so assigned and
makes the same  representations and warranties with respect thereto as the Buyer
makes in this  Agreement,  whereupon  the Buyer shall be relieved of any further
obligations,  responsibilities  and liabilities  with respect to the purchase of
all or the portion of the Preferred  Shares and Warrants the  obligation for the
purchase of which has been so assigned. In the case of any such assignment,  the
Company  shall agree in writing  with such  assignee to make  available  to such
assignee the benefits of the  Registration  Rights Agreement with respect to the
Common Shares  issuable on  conversion  of the Preferred  Shares or comprising a
portion of a Unit upon conversion of the Preferred Shares and on exercise of the
Warrants  and Class A Warrants  with  respect to which the  purchase  under this
Agreement has been so assigned.

                                      -11-
<PAGE>

         IN WITNESS WHEREOF,  this Agreement has been duly executed by the Buyer
or one of its officers thereunto duly authorized as of the date set forth below.

NUMBER OF SHARES:  6,000

PRICE PER SHARE:  $1,000.00

AGGREGATE PURCHASE PRICE:  $6,000,000.00

NAME OF BUYER:  GFL ADVANTAGE FUND LIMITED

SIGNATURE  /s/ C.P. Kroon
               -------------------------
               C.P Kroon

Title:  i.a. of A.P. de Groot/President
      ----------------------------------
Date:  6/28/96
      ----------------------------------
Address:   c/o CITCO
           Kaya Flamboyan 9
           Curacao, Netherlands Antilles


         This Agreement has been accepted as of the date set forth below.


HEMISPHERX BIOPHARMA, INC.

By:___________________
   
Title:________________

Date: ________________



<PAGE>

         IN WITNESS WHEREOF,  this Agreement has been duly executed by the Buyer
or one of its officers thereunto duly authorized as of the date set forth below.

NUMBER OF SHARES:  6,000

PRICE PER SHARE:  $1,000.00

AGGREGATE PURCHASE PRICE:  $6,000,000.00

NAME OF BUYER:  GFL ADVANTAGE FUND LIMITED

SIGNATURE 
         _____________________________
              
Title:
         _____________________________

Date:  
         _____________________________

Address:   c/o CITCO
           Kaya Flamboyan 9
           Curacao, Netherlands Antilles


         This Agreement has been accepted as of the date set forth below.


HEMISPHERX BIOPHARMA, INC.

By:  s/ William A. Carter
   -----------------------
Title: President
      --------------------
Date:  6/28/96
      --------------------


                          REGISTRATION RIGHTS AGREEMENT

     THIS  REGISTRATION  RIGHTS  AGREEMENT,  dated  as of June  28,  1996  (this
"Agreement"),  is made by and between  HEMISPHERx  BIOPHARMA,  INC.,  a Delaware
corporation (the  "Company"),  and the person named on the signature page hereto
(the "Initial Investor").

                              W I T N E S S E T H:

     WHEREAS,  in connection with the Subscription  Agreement,  dated as of June
28,  1996,  between the Initial  Investor  and the  Company  (the  "Subscription
Agreement"),  the  Company  has  agreed,  upon  the  terms  and  subject  to the
conditions  of the  Subscription  Agreement,  to issue  and sell to the  Initial
Investor an  aggregate  of 6,000  shares (the  "Preferred  Shares") of preferred
stock of the Company as provided in the Subscription Agreement,  which shares of
Preferred Stock are convertible into shares (the "Conversion  Shares") of Common
Stock,  $.001  par  value  per share  (the  "Common  Stock" ), or Units,  of the
Company,  and to issue to the Initial  Investor  warrants  (the  "Warrants")  to
purchase  100,000  shares  (subject to adjustment) of Common Stock (the "Warrant
Shares" and, together with the Conversion Shares, the "Shares") of Common Stock;
and

     WHEREAS,  to induce  the  Initial  Investor  to  execute  and  deliver  the
Subscription  Agreement,  the Company has agreed to provide certain registration
rights  under  the  Securities  Act of  1933,  as  amended,  and the  rules  and
regulations  thereunder,  or any similar  successor statute  (collectively,  the
"Securities  Act"),  and applicable  state  securities  laws with respect to the
Shares;

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency  of which are  hereby  acknowledged,  the  Company  and the  Initial
Investor hereby agree as follows:

     1. Definitions.

     (a) As used in this Agreement, the following terms shall have the following
meanings:

     (i)  "Investor"  means the Initial  Investor and any transferee or assignee
who agrees to become bound by the  provisions  of this  Agreement in  accordance
with Section 9 hereof.

     (ii) "register,"  "registered," and "registration"  refer to a registration
effected by  preparing  and filing a  Registration  Statement or  Statements  in
compliance with the Securities Act and pursuant to Rule 415 under the Securities
Act or any  successor  rule  providing  for offering  securities on a continuous
basis ("Rule 415"),  and the  declaration or ordering of  effectiveness  of such
Registration  Statement by the United States Securities and Exchange  Commission
(the "SEC").

<PAGE>

     (iii)  "Registrable  Securities"  means the Shares and any shares of Common
Stock  issued by the  Company to any  Investor  as a dividend  on the  Preferred
Shares,  the shares of Common  Stock  included in a Unit or any shares of Common
Stock issued by the Company to any holder of Common Stock Purchase Warrants.

     (iv) "Registration Statement" means a registration statement of the Company
under the Securities Act.

     (v) "Units" mean the units to be issued by the Company upon  conversion  of
the Preferred  Shares pursuant to the terms of the Preferred  Shares,  each Unit
consisting  of (i) one  share of Common  Stock  and (ii) one Class A  Redeemable
Common Stock Purchase Warrant to purchase one share of Common Stock (the "Common
Stock Purchase Warrant").

     (b) As used in this Agreement, the term Investor includes (i) each Investor
(as  defined  above)  and (ii) each  person  who is a  permitted  transferee  or
assignee of the Registrable Securities pursuant to Section 9 of this Agreement.

     (c) Capitalized terms defined in the introductory paragraph or the recitals
to  this  Agreement  shall  have  the  respective   meanings  therein  provided.
Capitalized  terms used herein and not otherwise  defined  herein shall have the
respective meanings set forth in the Subscription Agreement.

     2. Registration.

     (a) Mandatory  Registration.  The Company shall prepare, and on or prior to
the date which is 21 days after the date of the closing  under the  Subscription
Agreement  (the  "Closing  Date"),  file with the SEC a  Registration  Statement
covering at least  2,427,275  shares of Common Stock as Registrable  Securities,
and which  Registration  Statement shall state that, in accordance with Rule 416
under  the  Securities  Act,  such  Registration   Statement  also  covers  such
indeterminate number of additional shares of Common Stock as may become issuable
upon conversion of the Preferred  Shares and exercise of the Warrants to prevent
dilution resulting from stock splits, stock dividends or similar transactions or
by reason of changes in the  conversion  price of the  Preferred  Shares and the
exercise price of the Warrants in accordance with the respective  terms thereof.
If for three  consecutive  trading  days the  number of shares  included  in the
Registration Statement required to be filed as provided in the first sentence of
this Section 2(a) shall not be sufficient to cover the number of Units  issuable
on conversion in full of the unconverted Preferred Shares, then promptly, but in
no event later than 15 days after such  insufficiency  shall occur,  the Company
shall file with the SEC an additional Registration Statement on Form S-1 (or, if
eligible  at  the  time, Form S-3) or  other  applicable  form  covering    such

                                      -2-
<PAGE>

number of Units as shall be sufficient to permit such  conversion  and exercise.
If at any time the  Preferred  Shares become  convertible  into Units and if for
three consecutive trading days the number of shares included in the Registration
Statement  required to be filed shall not be  sufficient  to cover the number of
Units issuable on conversion in full of the unconverted  Preferred Shares,  then
promptly,  but in no event  later than 15 days after  such  insufficiency  shall
occur, the Company shall file with the SEC an additional  Registration Statement
on Form S-1 (or,  if eligible at the time,  Form S-3) or other  applicable  form
covering such number of Units as shall be  sufficient to permit such  conversion
and  exercise.  For all  purposes of this  Agreement  (other than  Section  2(b)
hereof)  such  additional  Registration  Statements  shall be  deemed  to be the
Registration  Statement  required to be filed by the Company pursuant to Section
2(a) of this  Agreement,  and the Company and the Investors  shall have the same
rights and  obligations  (other than  Section  2(c) hereof) with respect to such
additional  Registration  Statements  as they  shall  have with  respect  to the
initial  Registration  Statement required to be filed by the Company pursuant to
this Section  2(a).  The Company  shall be  permitted to include any  additional
shares of Common  Stock in any  registration  effected  pursuant to this Section
2(a).

     (b) Adjustment in Conversion Price. If the Registration  Statement covering
the  Registrable  Securities  required  to be filed by the  Company  pursuant to
Section 2(a) hereof is not effective within 90 days after the Closing Date, then
the  conversion  price of the Preferred  Shares shall be adjusted as provided in
the Certificate of Designations for the Preferred Shares.

     (c) Piggy-Back Registrations. If at any time the Company shall determine to
prepare and file with the SEC a Registration  Statement  relating to an offering
for its own account or the account of others under the  Securities Act of any of
its  equity  securities,  other  than on  Form  S-4 or Form  S-8 or  their  then
equivalents relating to equity securities to be issued solely in connection with
any  acquisition  of any entity or  business  or equity  securities  issuable in
connection with stock option or other employee  benefit plans, the Company shall
send to each Investor, who is entitled to registration rights under this Section
2(a) written notice of such  determination and, if within twenty (20) days after
receipt of such notice,  such Investor shall so request in writing,  the Company
shall include in such Registration  Statement all or any part of the Registrable
Securities  such  Investor  requests  to  be  registered,  except  that  if,  in
connection with any underwritten  public offering for the account of the Company
the managing  underwriter(s)  thereof shall impose a limitation on the number of
shares of Common  Stock  which may be  included  in the  Registration  Statement
because,  in such  underwriter(s)'  judgment,  such  limitation  is necessary to
effect an orderly  public  distribution,  then the Company shall be obligated to
include  in  such  Registration  Statement  only  such  limited  portion  of the
Registrable  Securities  with  respect  to which  such  Investor  has  requested

                                      -3-
<PAGE>

inclusion hereunder.  Any exclusion of Registrable  Securities shall be made pro
rata  among  the  Investors  seeking  to  include  Registrable  Securities,   in
proportion to the number of Registrable Securities sought to be included by such
Investors; provided, however, that the Company shall not exclude any Registrable
Securities unless the Company has first excluded all outstanding  securities the
holders of which are not entitled by right to inclusion  of  securities  in such
Registration Statement; and provided further, however, that, after giving effect
to the immediately  preceding proviso,  any exclusion of Registrable  Securities
shall be made pro rata with  holders  of other  securities  having  the right to
include such securities in the Registration  Statement. No right to registration
of  Registrable  Securities  under this Section 2(c) shall be construed to limit
any  registration  required  under Section 2(a) hereof.  The  obligations of the
Company under this Section 2(c) may be waived by Investors holding a majority in
interest of the  Registrable  Securities  and shall expire after the Company has
afforded the opportunity for the Investors to exercise registration rights under
this Section 2(c) for two registrations;  provided,  however,  that any Investor
who shall have had any  Registrable  Securities  excluded from any  Registration
Statement in  accordance  with this Section 2(c) shall be entitled to include in
an  additional  Registration  Statement  filed by the  Company  the  Registrable
Securities so excluded.  Notwithstanding  any other provision of this Agreement,
if the Registration  Statement  required to be filed pursuant to Section 2(a) of
this Agreement  shall have been ordered  effective by the SEC and thereafter the
Company shall have complied in all material  respects with its obligations under
this Agreement in respect of such Registration Statement, then the Company shall
not be obligated  to register any  Registrable  Securities  on any  Registration
Statement referred to in this Section 2(c).

     3.  Obligations of the Company.  In connection with the registration of the
Registrable Securities, the Company shall:

     (a) use its best efforts to cause each Registration  Statement  relating to
Registrable  Securities  to become  effective  as soon as  possible  after  such
Registration  Statement  is  filed  with the  SEC,  and  keep  the  Registration
Statement  effective pursuant to Rule 415 at all times until the later of (1) in
the case of any Registrable Securities, the earlier of (i) such date as is three
years after the date such  Registration  Statement is first ordered effective by
the SEC and (ii) the date on which all Registrable  Securities have been sold by
the Investors under circumstances in which the buyers may resell the Registrable
Securities without registration under the Securities Act and, (2) in the case of
Registrable  Securities that are Warrant Shares, the later of (i) the date which
is three  years  after the date such  Registration  Statement  if first  ordered
effective  by the SEC  (but in no  event  later  than  the  date  on  which  all
Registrable  Securities  that are Warrant Shares have been sold by the Investors

                                      -4-
<PAGE>

under  circumstances  in which the buyers may resell the Registrable  Securities
that are Warrant Shares without  registration under the Securities Act), in case
the Warrants  have been  exercised in full on a net exercise  basis and (ii) the
date which is three years after the latest  exercise  of the  Warrants  for cash
(but in no event later than the date on which all  Registrable  Securities  that
are Warrant Shares have been sold by the Investors under  circumstances in which
the buyers may resell the Registrable Securities that are Warrant Shares without
registration  under  the  Securities  Act)  (the  "Termination   Date"),   which
Registration  Statement  (including any  amendments or  supplements  thereto and
prospectuses  contained  therein)  shall not contain any untrue  statement  of a
material fact or omit to state a material fact required to be stated therein, or
necessary to make the statements therein, in light of the circumstances in which
they were made, not misleading;

     (b) prepare and file with the SEC such amendments (including post-effective
amendments)  and  supplements to the  Registration  Statement and the prospectus
used in connection with the  Registration  Statement as may be necessary to keep
the Registration  Statement  effective at all times until the Termination  Date,
and,  during such period,  comply with the provisions of the Securities Act with
respect to the disposition of all Registrable  Securities of the Company covered
by the  Registration  Statement  until  such  time  as all of  such  Registrable
Securities  have been  disposed of in  accordance  with the intended  methods of
disposition  by the seller or sellers  thereof as set forth in the  Registration
Statement;

     (c) furnish to each Investor whose  Registrable  Securities are included in
the Registration Statement and its legal counsel, (1) promptly after the same is
prepared  and  publicly  distributed,  filed  with  the SEC or  received  by the
Company, one copy of the Registration  Statement and any amendment thereto, each
preliminary  prospectus and prospectus and each amendment or supplement thereto,
each  letter  written by or on behalf of the  Company to the SEC or the staff of
the SEC and each  item of  correspondence  from the SEC or the  staff of the SEC
relating to such  Registration  Statement (other than any portion of any thereof
which  contains  information  for  which the  Company  has  sought  confidential
treatment)  and  (2)  such  number  of  copies  of  a  prospectus,  including  a
preliminary  prospectus,  and all  amendments and  supplements  thereto and such
other documents,  as such Investor may reasonably request in order to facilitate
the disposition of the Registrable Securities owned by such Investor;

     (d) use  reasonable  efforts to (i)  register  and qualify the  Registrable
Securities covered by the Registration  Statement under such other securities or
blue sky laws of such  jurisdictions  as the  Investors  who hold a majority  in
interest of the Registrable  Securities being offered reasonably  request,  (ii)
prepare   and   file  in  those   jurisdictions   such   amendments   (including
post-effective   amendments)   and   supplements  to  such   registrations   and

                                      -5-
<PAGE>

qualifications as may be necessary to maintain the effectiveness  thereof at all
times  until the  Termination  Date,  (iii)  take such  other  actions as may be
necessary to maintain such  registrations  and  qualifications  in effect at all
times  until the  Termination  Date and (iv) take all other  actions  reasonably
necessary or advisable to qualify the  Registrable  Securities  for sale in such
jurisdictions;  provided,  however,  that the  Company  shall not be required in
connection  therewith or as a condition thereto to (I) qualify to do business in
any  jurisdiction  where it would not  otherwise  be required to qualify but for
this  Section  3(d),  (II)  subject  itself  to  general  taxation  in any  such
jurisdiction,  (III)  file a general  consent  to service of process in any such
jurisdiction, (IV) provide any undertakings that cause more than nominal expense
or burden to the Company or (V) make any change in its charter or by-laws, which
in each case the Board of Directors of the Company  determines to be contrary to
the best interests of the Company and its stockholders;

     (e) as promptly as practicable  after becoming aware of such event,  notify
each Investor of the happening of any event of which the Company has  knowledge,
as a result of which the prospectus included in the Registration  Statement,  as
then in effect,  includes  an untrue  statement  of a material  fact or omits to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein,  in light of the circumstances  under which they were made,
not  misleading,  and use its best efforts  promptly to prepare a supplement  or
amendment to the  Registration  Statement  to correct  such untrue  statement or
omission,  and deliver such number of copies of such  supplement or amendment to
each Investor as such Investor may reasonably request;

     (f) as promptly as practicable  after becoming aware of such event,  notify
each Investor who holds Registrable Securities being sold of the issuance by the
SEC of any stop order or other  suspension of  effectiveness of the Registration
Statement at the earliest possible time;

     (g) permit a single  firm of counsel  designated  as selling  stockholders'
counsel by the  Investors  who hold a majority in  interest  of the  Registrable
Securities  being sold to review the  Registration  Statement and all amendments
and supplements  thereto a reasonable  period of time prior to their filing with
the SEC, at the selling stockholders' expense;

     (h) make generally  available to its security holders as soon as practical,
but not later  than  ninety  (90) days  after  the close of the  period  covered
thereby,  an earnings  statement (in form  complying with the provisions of Rule
158 under the Securities Act) covering a twelve-month period beginning not later
than the first day of the Company's  fiscal quarter next following the effective
date of the Registration Statement;

                                      -6-
<PAGE>


     (i)  make  available  for  inspection  by  any  Investor,  any  underwriter
participating in any disposition pursuant to the Registration Statement, and any
attorney, accountant or other agent retained by any such Investor or underwriter
(collectively,  the  "Inspectors"),  all pertinent  financial and other records,
pertinent corporate documents and properties of the Company  (collectively,  the
"Records"),  as shall be  reasonably  necessary  to  enable  each  Inspector  to
exercise its due diligence  responsibility,  and cause the  Company's  officers,
directors  and  employees  to supply all  information  which any  Inspector  may
reasonably request for purposes of such due diligence;  provided,  however, that
each  Inspector  shall  hold in  confidence  and shall  not make any  disclosure
(except to an  Investor)  of any Record or other  information  which the Company
determines  in good faith to be  confidential,  and of which  determination  the
Inspectors  are so  notified,  unless  (i) the  disclosure  of such  Records  is
necessary  to avoid or correct a  misstatement  or omission in any  Registration
Statement, (ii) the release of such Records is ordered pursuant to a subpoena or
other order from a court or government  body of competent  jurisdiction or (iii)
the information in such Records has been made generally  available to the public
other  than by  disclosure  in  violation  of this or any other  agreement.  The
Company shall not be required to disclose any  confidential  information in such
Records to any Inspector until and unless such Inspector shall have entered into
confidentiality  agreements (in form and substance  satisfactory to the Company)
with the Company with respect thereto, substantially in the form of this Section
3(k). Each Investor agrees that it shall,  upon learning that disclosure of such
Records  is  sought  in  or  by  a  court  or  governmental  body  of  competent
jurisdiction or through other means, give prompt notice to the Company and allow
the  Company,  at its  expense,  to  undertake  appropriate  action  to  prevent
disclosure  of,  or to  obtain  a  protective  order  for,  the  Records  deemed
confidential.  The  Company  shall  hold in  confidence  and  shall not make any
disclosure  of  information  concerning  an  Investor  provided  to the  Company
pursuant to Section 4(e) hereof  unless (i)  disclosure of such  information  is
necessary to comply with federal or state  securities  laws, (ii) the disclosure
of such  information is necessary to avoid or correct a misstatement or omission
in any Registration Statement,  (iii) the release of such information is ordered
pursuant  to a  subpoena  or other  order from a court or  governmental  body of
competent  jurisdiction  or  (iv)  such  information  has  been  made  generally
available  to the public  other than by  disclosure  in violation of this or any
other agreement. The Company agrees that it shall, upon learning that disclosure
of such  information  concerning  an  Investor  is  sought  in or by a court  or
governmental body of competent  jurisdiction or through other means, give prompt
notice to such  Investor,  at its expense,  to undertake  appropriate  action to
prevent disclosure of, or to obtain a protective order for, such information;

     (j) use its  best  efforts  (i) to  cause  all the  Registrable  Securities
covered by the Registration Statement to be listed on the Nasdaq SmallCap Market

                                      -7-
<PAGE>

or such other principal  securities market on which securities of the same class
or series  issued by the Company are then listed or traded or (ii) if securities
of the same class or series as the Registrable Securities are not then listed on
the Nasdaq SmallCap Market or any such other securities  market,  to arrange for
at least  two  market  makers  to  register  with the  National  Association  of
Securities  Dealers,  Inc.  ("NASD")  as such with  respect to such  Registrable
Securities;

     (k) provide a transfer agent and  registrar,  which may be a single entity,
for  the  Registrable  Securities  not  later  than  the  effective  date of the
Registration Statement;

     (l)  cooperate  with the Investors who hold  Registrable  Securities  being
offered to facilitate the timely  preparation and delivery of certificates  (not
bearing any  restrictive  legends)  representing  Registrable  Securities  to be
offered pursuant to the Registration  Statement and enable such  certificates to
be in such  denominations  or amounts the Investors may  reasonably  request and
registered  in such  names as the  Investors  may  request;  and,  within  three
business  days  after  a  Registration   Statement  which  includes  Registrable
Securities is ordered effective by the SEC, the Company shall deliver, and shall
cause legal counsel  selected by the Company to deliver,  to the transfer  agent
for the Registrable  Securities (with copies to the Investors whose  Registrable
Securities  are included in such  Registration  Statement) an instruction in the
form attached hereto as Exhibit 1 (without substantive additions thereto) and an
opinion  of such  counsel  in the form  attached  hereto as  Exhibit 2  (without
substantive additions thereto); and

     (m) take all other reasonable  actions necessary to expedite and facilitate
disposition  by the  Investor  of the  Registrable  Securities  pursuant  to the
Registration Statement.

     4. Obligations of the Investors. In connection with the registration of the
Registrable Securities, the Investors shall have the following obligations:

     (a) It shall be a condition  precedent to the obligations of the Company to
complete  the  registration  pursuant  to this  Agreement  with  respect  to the
Registrable Securities of a particular Investor that such Investor shall furnish
to the Company such information  regarding  itself,  the Registrable  Securities
held by it and the intended method of disposition of the Registrable  Securities
held by it as shall be reasonably  required to effect the  registration  of such
Registrable  Securities and shall execute such documents in connection with such
registration as the Company may reasonably request. At least four (4) days prior
to the first anticipated filing date of the Registration Statement,  the Company
shall notify each  Investor of the  information  the Company  requires from each
such  Investor  (the  "Requested   Information")   if  any  of  such  Investor's
Registrable Securities are eligible for inclusion in the Registration Statement.

                                      -8-
<PAGE>

If at least one (1)  business  day prior to the filing  date the Company has not
received  the  Requested   Information  from  an  Investor  (a   "Non-Responsive
Investor"),  then  the  Company  may  file the  Registration  Statement  without
including Registrable Securities of such Non-Responsive Investor;

     (b)  Each  Investor  by  such  Investor's  acceptance  of  the  Registrable
Securities  agrees to cooperate with the Company as reasonably  requested by the
Company  in  connection  with the  preparation  and  filing of the  Registration
Statement hereunder, unless such Investor has notified the Company in writing of
such  Investor's  election  to  exclude  all  of  such  Investor's   Registrable
Securities from the Registration Statement;

     (c) Each Investor  agrees that, upon receipt of any notice from the Company
of the  happening  of any event of the kind  described  in Section 3(e) or 3(f),
such Investor will immediately discontinue disposition of Registrable Securities
pursuant to the  Registration  Statement  covering such  Registrable  Securities
until  such  Investor's  receipt of the  copies of the  supplemented  or amended
prospectus  contemplated  by Section  3(e) or 3(f) and,  if so  directed  by the
Company,  such  Investor  shall  deliver to the  Company  (at the expense of the
Company) or destroy (and deliver to the Company a  certificate  of  destruction)
all  copies in such  Investor's  possession,  of the  prospectus  covering  such
Registrable Securities current at the time of receipt of such notice; and

     5. Expenses of Registration.  All expenses, other than fees and expenses of
investment bankers and other than brokerage commissions,  incurred in connection
with registrations,  filings or qualifications pursuant to Section 3, including,
without limitation, all registration,  listing and qualifications fees, printers
and accounting  fees and the fees and  disbursements  of counsel for the Company
and the Investors,  shall be borne by the Company;  provided,  however, that the
Investors  shall  bear the  fees and  out-of-pocket  expenses  of the one  legal
counsel selected by the Investors pursuant to Section 2(b) hereof.

     6. Indemnification. In the event any Registrable Securities are included in
a Registration Statement under this Agreement:

     (a) To the extent  permitted by law, the Company  will  indemnify  and hold
harmless each Investor who holds such Registrable Securities,  the directors, if
any, of such Investor,  the officers, if any, of such Investor,  each person, if
any, who controls any Investor  within the meaning of the  Securities Act or the
Exchange  Act,  any  underwriter  (as  defined  in the  Securities  Act) for the
Investors,  the directors, if any, of such underwriter and the officers, if any,
of such underwriter,  and each person, if any, who controls any such underwriter
within  the  meaning  of the  Securities  Act  or the  Exchange  Act  (each,  an
"Indemnified  Person"),   against  any  losses,  claims,  damages,  expenses  or

                                      -9-
<PAGE>

liabilities (joint or several) incurred (collectively, "Claims") to which any of
them may become subject under the Securities Act, the Exchange Act or otherwise,
insofar  as such  Claims  (or  actions  or  proceedings,  whether  commenced  or
threatened,  in  respect  thereof)  arise  out of or are  based  upon any of the
following statements,  omissions or violations in the Registration Statement, or
any post-effective  amendment thereof, or any prospectus  included therein:  (i)
any untrue statement or alleged untrue statement of a material fact contained in
the  Registration  Statement  or any  post-effective  amendment  thereof  or the
omission or alleged  omission to state  therein a material  fact  required to be
stated therein or necessary to make the statements therein not misleading,  (ii)
any untrue statement or alleged untrue statement of a material fact contained in
any  preliminary  prospectus  if  used  prior  to the  effective  date  of  such
Registration  Statement,  or  contained in the final  prospectus  (as amended or
supplemented,  if the Company files any amendment thereof or supplement  thereto
with the SEC) or the omission or alleged  omission to state therein any material
fact  necessary  to  make  the  statements   made  therein,   in  light  of  the
circumstances  under which the  statements  therein were made, not misleading or
(iii) any violation or alleged  violation by the Company of the Securities  Act,
the Exchange Act, any state  securities law or any rule or regulation  under the
Securities Act, the Exchange Act or any state securities law (the matters in the
foregoing clauses (i) through (iii) being, collectively,  "Violations"). Subject
to the  restrictions  set forth in  Section  6(d) with  respect to the number of
legal  counsel,  the  Company  shall  reimburse  the  Investors  and  each  such
underwriter  or controlling  person,  promptly as such expenses are incurred and
are due and payable, for any legal fees or other reasonable expenses incurred by
them  in   connection   with   investigating   or  defending   any  such  Claim.
Notwithstanding  anything to the contrary contained herein, the  indemnification
agreement contained in this Section 6(a): (I) shall not apply to a Claim arising
out of or based upon a Violation which occurs in reliance upon and in conformity
with information  furnished in writing to the Company by any Indemnified  Person
or underwriter for such Indemnified  Person expressly for use in connection with
the preparation of the Registration  Statement or any such amendment  thereof or
supplement  thereto, if such prospectus was timely made available by the Company
pursuant to Section 3(c) hereof; (II) with respect to any preliminary prospectus
shall not inure to the benefit of any such person from whom the person asserting
any such Claim purchased the Registrable Securities that are the subject thereof
(or  to the  benefit  of any  person  controlling  such  person)  if the  untrue
statement or omission of material fact contained in the  preliminary  prospectus
was  corrected  in the  prospectus,  as then  amended or  supplemented,  if such
prospectus  was timely made  available  by the Company  pursuant to Section 3(c)
hereof;  and (III) shall not apply to amounts paid in settlement of any Claim if
such  settlement is effected  without the prior written  consent of the Company,
which consent shall not be unreasonably withheld. Such indemnity shall remain in
full force and effect  regardless of any  investigation  made by or on behalf of

                                      -10-
<PAGE>

the  Indemnified  Person  and shall  survive  the  transfer  of the  Registrable
Securities by the Investors pursuant to Section 9.

     (b) In connection with any  Registration  Statement in which an Investor is
participating,  each such Investor agrees to indemnify and hold harmless, to the
same extent and in the same manner set forth in Section 6(a), the Company,  each
of its  directors,  each of its officers who signs the  Registration  Statement,
each  person,  if any,  who  controls  the  Company  within  the  meaning of the
Securities Act or the Exchange Act, any  underwriter  and any other  stockholder
selling  securities  pursuant  to  the  Registration  Statement  or  any  of its
directors or officers or any person who controls such stockholder or underwriter
within the meaning of the Securities Act or the Exchange Act  (collectively  and
together with an Indemnified Person, an "Indemnified Party"),  against any Claim
to which any of them may become subject,  under the Securities Act, the Exchange
Act or  otherwise,  insofar  as such  Claim  arises  out of or is based upon any
Violation,  in each  case to the  extent  (and  only to the  extent)  that  such
Violation  occurs in reliance  upon and in conformity  with written  information
furnished to the Company by such Investor  expressly for use in connection  with
such Registration Statement; and such Investor will reimburse any legal or other
expenses  reasonably  incurred  by  them in  connection  with  investigating  or
defending  any such  Claim;  provided,  however,  that the  indemnity  agreement
contained in this Section 6(b) shall not apply to amounts paid in  settlement of
any Claim if such  settlement is effected  without the prior written  consent of
such  Investor,  which consent  shall not be  unreasonably  withheld;  provided,
further,  however, that the Investor shall be liable under this Section 6(b) for
only that amount of a Claim as does not exceed the amount,  if any, by which (1)
the net  proceeds  to such  Investor  as a  result  of the  sale of  Registrable
Securities pursuant to such Registration Statement exceed (2) the purchase price
paid by such  Investor  for the  Registrable  Securities  sold by such  Investor
pursuant to such  Registration  Statement.  Such indemnity  shall remain in full
force and effect  regardless of any  investigation  made by or on behalf of such
Indemnified  Party and shall survive the transfer of the Registrable  Securities
by the Investors pursuant to Section 9. Notwithstanding anything to the contrary
contained herein, the  indemnification  agreement contained in this Section 6(b)
with respect to any preliminary prospectus shall not inure to the benefit of any
Indemnified Party if the untrue statement or omission of material fact contained
in the preliminary prospectus was corrected on a timely basis in the prospectus,
as then amended or supplemented.

     (c) Promptly  after receipt by an Indemnified  Person or Indemnified  Party
under this Section 6 of notice of the commencement of any action  (including any
governmental  action),  such Indemnified Person or Indemnified Party shall, if a
Claim in respect thereof is to be made against any indemnifying party under this

                                      -11-
<PAGE>

Section  6,  deliver  to  the  indemnifying   party  a  written  notice  of  the
commencement  thereof  and the  indemnifying  party  shall  have  the  right  to
participate in, and, to the extent the  indemnifying  party so desires,  jointly
with any other indemnifying  party similarly  noticed,  to assume control of the
defense thereof with counsel mutually  satisfactory to the Indemnified Person or
the  Indemnified  Party,  as  the  case  may  be;  provided,  however,  that  an
Indemnified  Person or Indemnified  Party shall have the right to retain its own
counsel, with the fees and expenses to be paid by the indemnifying party, if, in
the  reasonable  opinion of counsel  retained  by the  indemnifying  party,  the
representation  by such counsel of the Indemnified  Person or Indemnified  Party
and the  indemnifying  party would be  inappropriate  due to actual or potential
differing interests between such Indemnified Person or Indemnified Party and any
other party  represented by such counsel in such  proceeding.  The Company shall
pay for only one separate  legal counsel for the  Investors;  such legal counsel
shall be  selected  by the  Investors  holding a  majority  in  interest  of the
Registrable Securities included in the Registration Statement to which the Claim
relates.  The failure to deliver written notice to the indemnifying party within
a reasonable time of the  commencement of any such action shall not relieve such
indemnifying  party of any liability to the  Indemnified  Person or  Indemnified
Party under this Section 6, except to the extent that the indemnifying  party is
prejudiced in its ability to defend such action. The indemnification required by
this Section 6 shall be made by periodic  payments of the amount  thereof during
the course of the  investigation or defense,  as such expense,  loss,  damage or
liability is incurred and is due and payable.

     7. Contribution. To the extent any indemnification by an indemnifying party
is  prohibited  or limited by law,  the  indemnifying  party  agrees to make the
maximum contribution with respect to any amounts for which it would otherwise be
liable  under  Section  6 to the  fullest  extent  permitted  by law;  provided,
however,  that (a) no contribution shall be made under  circumstances  where the
maker would not have been liable for  indemnification  under the fault standards
set  forth in  Section  6, (b) no  seller of  Registrable  Securities  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities Act) shall be entitled to contribution from any seller of Registrable
Securities  who was not  guilty  of such  fraudulent  misrepresentation  and (c)
contribution by any seller of Registrable  Securities shall be limited in amount
to the net amount of  proceeds  received  by such  seller  from the sale of such
Registrable Securities.

     8.  Reports  under  Exchange  Act.  With a view to making  available to the
Investors the benefits of Rule 144  promulgated  under the Securities Act or any
other  similar  rule or  regulation  of the SEC that may at any time  permit the
Investors to sell  securities of the Company to the public without  registration
("Rule 144"), the Company agrees to:

                                      -12-
<PAGE>

     (a)  make  and keep  public  information  available,  as  those  terms  are
understood and defined in Rule 144;

     (b) file with the SEC in a timely  manner all reports  and other  documents
required of the Company under the Securities Act and the Exchange Act; and

     (c) furnish to each  Investor  so long as such  Investor  owns  Registrable
Securities,  promptly upon request,  (i) a written statement by the Company that
it has complied with the reporting  requirements of Rule 144, the Securities Act
and the Exchange Act, (ii) a copy of the most recent annual or quarterly  report
of the Company and such other  reports and documents so filed by the Company and
(iii)  such  other  information  as may be  reasonably  requested  to permit the
Investors to sell such securities pursuant to Rule 144 without registration.

     9. Assignment of the  Registration  Rights.  The rights to have the Company
register   Registrable   Securities   pursuant  to  this   Agreement   shall  be
automatically  assigned by the Investors to  transferees  or assignees of all or
any  portion of such  securities  which was issued upon  conversion  of at least
1,000 Preferred Shares, or any transferee of any portion of the Preferred Shares
which is at least 1,000 Preferred Shares, or any combination  thereof,  only if:
(a) the  Investor  agrees in writing with the  transferee  or assignee to assign
such rights,  and a copy of such  agreement is furnished to the Company within a
reasonable time after such  assignment,  (b) the Company is, within a reasonable
time after such transfer or assignment, furnished with written notice of (i) the
name and address of such  transferee  or assignee and (ii) the  securities  with
respect to which such registration rights are being transferred or assigned, (c)
immediately  following  such transfer or assignment  the further  disposition of
such securities by the transferee or assignee is restricted under the Securities
Act and  applicable  state  securities  laws,  and (d) at or before the time the
Company received the written notice  contemplated by clause (b) of this sentence
the transferee or assignee agrees in writing with the Company to be bound by all
of the provisions contained herein.

     10. Amendment of Registration  Rights.  Any provision of this Agreement may
be amended and the observance  thereof may be waived  (either  generally or in a
particular  instance and either  retroactively or prospectively),  only with the
written  consent of the Company and Investors who hold a majority in interest of
the Registrable Securities.  Any amendment or waiver effected in accordance with
this Section 10 shall be binding upon each Investor and the Company.

     11. Miscellaneous.

     (a) A person or entity is deemed to be a holder of  Registrable  Securities
whenever such person or entity owns of record such  Registrable  Securities.  If

                                      -13-
<PAGE>

the Company receives conflicting instructions,  notices or elections from two or
more persons or entities with respect to the same  Registrable  Securities,  the
Company shall act upon the basis of  instructions,  notice or election  received
from the registered owner of such Registrable Securities.

     (b) Notices required or permitted to be given hereunder shall be in writing
and shall be deemed to be sufficiently given when personally delivered (by hand,
by courier, by telephone line facsimile  transmission or other means) or sent by
certified mail,  return receipt  requested,  properly  addressed and with proper
postage pre-paid (i) if to the Company, at Hemispherx BioPharma,  Inc., 1617 JFK
Boulevard, Philadelphia, Pennsylvania 19103, Attention: Chief Executive Officer,
(ii) if to the Initial Investor,  at the address set forth under its name in the
Subscription  Agreement and (iii) if to any other  Investor,  at such address as
such Investor  shall have  provided in writing to the Company,  or at such other
address as each such party  furnishes  by notice given in  accordance  with this
Section 11(b), and shall be effective,  when personally delivered,  upon receipt
and,  when so sent by certified  mail,  four days after  deposit with the United
States Postal Service.

     (c)  Failure  of any  party to  exercise  any right or  remedy  under  this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

     (d)  This  Agreement  shall  be  enforced,  governed  by and  construed  in
accordance  with the laws of the State of New York applicable to agreements made
and to be performed  entirely within such State. In the event that any provision
of this Agreement is invalid or  unenforceable  under any applicable  statute or
rule of law, then such provision shall be deemed  inoperative to the extent that
it may  conflict  therewith  and shall be deemed  modified to conform  with such
statute  or rule of law.  Any  provision  hereof  which  may  prove  invalid  or
unenforceable  under any law shall not affect the validity or  enforceability of
any other provision hereof.

     (e) This  Agreement  constitutes  the entire  agreement  among the  parties
hereto with respect to the subject  matter  hereof.  There are no  restrictions,
promises, warranties or undertakings,  other than those set forth or referred to
herein. This Agreement  supersedes all prior agreements and understandings among
the parties hereto with respect to the subject matter hereof.

     (f) Subject to the  requirements of Section 9 hereof,  this Agreement shall
inure to the benefit of and be binding upon the  successors  and assigns of each
of the parties hereto.

                                      -14-
<PAGE>


     (g) All  pronouns  and  any  variations  thereof  refer  to the  masculine,
feminine or neuter, singular or plural, as the context may require.

     (h) The headings in this  Agreement are for  convenience  of reference only
and shall not limit or otherwise affect the meaning hereof.

     (i) The Company acknowledges that any failure by the Company to perform its
obligations  under this Agreement (and no other agreement),  including,  without
limitation,  the Company's  obligations under Section 3(l), or any delay in such
performance  could  result  in both  direct  and  consequential  damages  to the
Investors and the Company  agrees that,  in addition to any other  liability the
Company may have by reason of any such  failure or delay,  the Company  shall be
liable for all direct and  consequential  damages  caused by any such failure or
delay.

     (j) This  Agreement  may be executed in two or more  counterparts,  each of
which shall be deemed an original but all of which shall  constitute one and the
same agreement.  This Agreement,  once executed by a party,  may be delivered to
the other party hereto by telephone  line  facsimile  transmission  of a copy of
this Agreement bearing the signature of the party so delivering this Agreement.

                                      -15-
<PAGE>



                  IN WITNESS WHEREOF,  the parties have caused this Agreement to
be duly executed by their  respective  officers  thereunto duly authorized as of
day and year first above written.

                                        HEMISPHERX BIOPHARMA, INC.

                                        By /s/ William A Carter
                                          ---------------------------
                                          Name:  William A. Carter
                                          Title: President

                                        INITIAL INVESTOR:

                                        NAME:  GFL ADVANTAGE FUND
                                                  LIMITED

                                        By__________________________
                                          Name:
                                          Title:

<PAGE>


                  IN WITNESS WHEREOF,  the parties have caused this Agreement to
be duly executed by their  respective  officers  thereunto duly authorized as of
day and year first above written.

                                        HEMISPHERX BIOPHARMA, INC.

                                        By___________________________
                                          Name:   
                                          Title:  

                                        INITIAL INVESTOR:

                                        NAME:  GFL ADVANTAGE FUND
                                                  LIMITED

                                        By s/C.P. Kroon
                                          ----------------------------
                                          Name:C.P. Kroon
                                          Title: i.a. of Arno de Groot
                                              President

<PAGE>

                                                                    EXHIBIT 1
                                                                       to
                                                                  Registration
                                                                Rights Agreement


                              [Company Letterhead]


                                     [Date]


[Name and address of Transfer Agent]

Ladies and Gentlemen:

     This letter shall serve as our irrevocable  authorization  and direction to
you (1) to transfer or  re-register  the  certificates  for the shares of Common
Stock, $.001 par value per share (the "Common Stock"), of Hemispherx  BioPharma,
Inc., a Delaware corporation (the "Company"),  represented by certificate number
_______ for _______  shares (the  "Outstanding  Common  Shares") of Common Stock
presently  registered in the name of [Name of Investor]  upon  surrender of such
certificate to you,  notwithstanding  the legend appearing on such  certificate,
(2) to issue shares (the " Conversion Common Shares") of Common Stock to or upon
the order of the holders of record  from time to time of shares (the  "Preferred
Shares") of Series D Convertible  Preferred Stock,  $.01 par value per share, of
the Company upon surrender to you for conversion of  certificates  for Preferred
Shares and a properly  completed and duly  executed  Notice of Conversion in the
form enclosed  herewith and (3) to issue shares (the "Warrant Common Shares") of
Common  Stock to or upon the order of the holders of record from time to time of
warrants (the "Warrants") to purchase shares of Common Stock of the Company upon
surrender to you of Warrants and a properly  completed and duly executed Form of
Subscription in the form enclosed  herewith.  The transfer or re-registration of
certificates  for the  Outstanding  Common  Shares by you should be made at such
time as you are  requested  to do so by the  record  holder  of the  Outstanding
Common  Shares.  The  certificate  issued upon such transfer or  re-registration
should be  registered  in such name as  requested by the holder of record of the
certificate  surrendered  to you and  should  not bear any  legend  which  would
restrict the transfer of the shares represented  thereby.  In addition,  you are
hereby  directed  to  remove  any  stop-transfer  instruction  relating  to  the
Outstanding Common Shares. Certificates for the Conversion Common Shares and the
Warrant Common Shares should not bear any  restrictive  legend and should not be
subject to any stop-transfer restriction.

     Contemporaneously  with  the  delivery  of  this  letter,  the  Company  is
delivering to you an opinion of __________ as to  registration  of the resale of
the  Outstanding  Common Shares,  the  Conversion  Common Shares and the Warrant
Common Shares under the Securities Act of 1933, as amended.

                                       1-1

<PAGE>

     Should you have any questions concerning this matter, please contact me.

                                          Very truly yours,

                                          HEMISPHERX BIOPHARMA, INC.

                                          By: _____________________________
                                                 Name:
                                                 Title:

Enclosure
cc:   [Name of Investor]

                                       1-2

<PAGE>

                                                                  EXHIBIT 2
                                                                      to
                                                                Registration
                                                               Rights Agreement


                                     [Date]

[Name and address
of transfer agent]

                           HEMISPHERX BIOPHARMA, INC.
                             Shares of Common Stock

Ladies and Gentlemen:

     We are counsel to Hemispherx  BioPharma,  Inc., a Delaware corporation (the
"Company"),  and we  understand  that  [Name of  Investor]  (the  "Holder")  has
purchased  from the Company an aggregate of shares (the  "Preferred  Shares") of
the Company's Series D Convertible  Preferred  Stock,  $.01 par value per share,
represented by Certificate Nos. , and , respectively  convertible into shares of
Common  Stock,  $.001 par value (the "Common  Stock"),  and warrants to purchase
shares of Common Stock (the "Warrants").  The Preferred Shares were purchased by
the Holder  pursuant to a  Subscription  Agreement,  dated as of July __,  1996,
between the Holder and the Company (the "Subscription Agreement"). Pursuant to a
Registration  Rights Agreement,  dated as of July __, 1996,  between the Company
and the Holder (the "Registration  Rights Agreement") entered into in connection
with  the  purchase  by the  Holder  of the  Preferred  Shares  pursuant  to the
Subscription Agreement,  the Company agreed with the Holder, among other things,
to  register  for resale by the Holder  shares (the  "Common  Shares") of Common
Stock  issuable upon  conversion of the Preferred  Shares and on exercise of the
Warrants under the Securities  Act of 1933, as amended (the  "Securities  Act"),
upon the terms provided in the Registration Rights Agreement. In connection with
the exercise by the Holder of its  registration  rights  under the  Registration
Rights Agreement, on __________, 1996 the Company filed a Registration Statement
on Form S- (File No. 333- ) (the  "Registration  Statement") with the Securities
and Exchange  Commission (the "SEC") relating to the Common Shares,  which names
the  Holder  as a  selling  stockholder  thereunder.  [If  notice  from  SEC  is
available:  The Company has received a notice from the SEC that the Registration
Statement  has  been  declared  effective.  A copy of such  notice  is  attached
hereto.]

     Based on the  foregoing,  we are of the opinion that the Common Shares have
been registered under the Securities Act.

                                       2-1
<PAGE>


     This   opinion  has  been   furnished  to  you  in   connection   with  the
above-referenced transaction and may not be used for any other purpose or by any
other  person.  We assume no  responsibility  to inform you of events or changes
occurring after the date hereof.

                  [Other appropriate language to be included.]


                                                 Very truly yours,

cc:      [Name of Investor]

                                       2-2



THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE  HAVE NOT BEEN REGISTERED UNDER
THE  SECURITIES ACT OF 1933, AS AMENDED.  THE SECURITIES  HAVE BEEN ACQUIRED FOR
INVESTMENT  AND MAY NOT BE SOLD,  TRANSFERRED  OR  ASSIGNED IN THE ABSENCE OF AN
EFFECTIVE  REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF
1933,  AS AMENDED,  OR AN OPINION OF COUNSEL THAT  REGISTRATION  IS NOT REQUIRED
UNDER SAID ACT.

                                                Right to Purchase 100,000 Shares
                                                of Common Stock of Hemispherx
                                                BioPharma, Inc.

                           HEMISPHERx BIOPHARMA, INC.

                          Common Stock Purchase Warrant

     HEMISPHERX  BIOPHARMA,  INC., a Delaware corporation (the "Company") hereby
certifies  that,  for value  received,  GFL Advantage Fund Limited or registered
assigns (the  "Holder"),  is entitled,  subject to the terms set forth below, to
purchase  from the  Company  at any  time or from  time to time  after  the date
hereof,  and before 5:00 p.m.,  New York City time, on the  Expiration  Date (as
hereinafter  defined),  100,000  fully paid and  nonassessable  shares of Common
Stock,  $.001 par value per share,  of the Company at a purchase price per share
equal to the Purchase Price (as hereinafter defined).  The number of such shares
of Common Stock and the Purchase  Price are subject to adjustment as provided in
this Warrant.

     As used herein the following terms,  unless the context otherwise requires,
have the following respective meanings:

          (a) The term  "Business  Day" as used herein shall mean a day on which
     the New York Stock Exchange is open for business.

          (b) The term "Common Stock" includes the Company's Common Stock, $.001
     par  value per  share,  as  authorized  on the date  hereof,  and any other
     securities  into which or for which the Common  Stock may be  converted  or
     exchanged pursuant to a plan of recapitalization,  reorganization,  merger,
     sale of assets or otherwise.

          (c) The term "Company" shall include  Hemispherx  BioPharma,  Inc. and
     any  corporation  that  shall  succeed  to  or  assume  the  obligation  of
     Hemispherx BioPharma, Inc. hereunder.

<PAGE>


          (d) The term "Expiration Date" refers to November 2, 2000.

          (e) The term "Other Securities" refers to any stock (other than Common
     Stock) and other  securities of the Company or any other person  (corporate
     or  otherwise)  which  the  Holder  of this  Warrant  at any time  shall be
     entitled  to  receive,  or shall have  received,  on the  exercise  of this
     Warrant,  in lieu of or in addition to Common  Stock,  or which at any time
     shall  be  issuable  or  shall  have  been  issued  in  exchange  for or in
     replacement of Common Stock or Other Securities pursuant to Section 4.

          (f) The term "Purchase Price" shall mean $4.00,  subject to adjustment
     as provided in this Warrant.

     1. Exercise of Warrant.

     1.1 Exercise at Option of Holder.  (a) This Warrant may be exercised by the
Holder  hereof  in full or in part at any time or from time to time  during  the
exercise  period  specified in the first  paragraph  hereof until the Expiration
Date by surrender of this Warrant and the subscription form annexed hereto (duly
executed) by such Holder, to the Company at its principal office, accompanied by
payment,  in cash or by certified or official bank check payable to the order of
the Company in the amount  obtained by  multiplying  (a) the number of shares of
Common  Stock  designated  by the  Holder  in the  subscription  form by (b) the
Purchase  Price  then in  effect.  On any  partial  exercise  the  Company  will
forthwith  issue and  deliver  to or upon the order of the  Holder  hereof a new
Warrant or Warrants of like tenor,  in the name of the Holder  hereof or as such
Holder  (upon  payment  by such  Holder of any  applicable  transfer  taxes) may
request,  providing  in the  aggregate  on the  face or  faces  thereof  for the
purchase  of the  number of shares of Common  Stock for which  such  Warrant  or
Warrants  may  still be  exercised.  Notwithstanding  anything  to the  contrary
contained  herein,  if, at any time  shares of  Series D  Convertible  Preferred
Stock, $.01 par value ("Preferred  Stock"), of the Company issued by the Company
to GFL Advantage Fund Limited  ("Advantage")  are converted into units ("Units")
comprised of one share of Common  Stock and one Class A Redeemable  Common Stock
Purchase  Warrant  (rather  than being  converted  solely  into shares of Common
Stock),  then the number of shares of Common  Stock  into which this  Warrant is
exercisable  shall be reduced  simultaneously  with each such  conversion  by an
amount  proportionately  by the  percentage  of the  aggregate  stated  value of
Preferred  Stock so converted  equal to the product  obtained by multiplying (1)
the number of shares of Common  Stock  which  initially  may be  purchased  upon
exercise  of this  Warrant (as the same shall have been  adjusted in  accordance
with Section 5) times (2) a fraction, the numerator of which shall be the number
of shares of Preferred  Stock  converted  into Units in such  conversion and the
denominator of which shall be 6,000.

                                      -2-
<PAGE>


     (b)  Notwithstanding any other provision of this Warrant, in no event shall
Advantage be entitled at any time to purchase a number of shares of Common Stock
on exercise of this Warrant in excess of that number of shares upon  purchase of
which the sum of (1) the number of shares of Common Stock  beneficially owned by
Advantage,  or any person associated with, or serving as an adviser to Advantage
(each a "GFL Person" and collectively,  the "GFL Persons") (other than shares of
Common Stock deemed  beneficially owned through the ownership of the unexercised
portion of this Warrant and shares of Preferred Stock  beneficially owned by all
GFL Persons) and (2) the number of shares of Common Stock issuable upon exercise
of the portion of this Warrant with respect to which the  determination  in this
sentence is being made,  would result in beneficial  ownership by any GFL Person
of more than 4.9% of the outstanding shares of Common Stock. For purposes of the
immediately  preceding  sentence,  beneficial  ownership  shall be determined in
accordance  with  Section  13(d) of the  Securities  Exchange  Act of  1934,  as
amended, and Regulation 13D-G thereunder, except as otherwise provided in clause
(1) of the immediately preceding sentence.

     1.2 Net  Issuance.  Notwithstanding  anything to the contrary  contained in
Section 1.1,  the Holder may elect to exercise  this Warrant in whole or in part
by  receiving  shares  of  Common  Stock  equal to the net  issuance  value  (as
determined  below) of this Warrant,  or any part hereof,  upon surrender of this
Warrant at the  principal  office of the  Company  together  with notice of such
election,  in which  event the  Company  shall  issue to the  Holder a number of
shares of Common Stock computed using the following formula:

     X = (Y (A-B))/A

         Where:   X =  the number of shares of Common Stock to be issued  to the
                       Holder

                  Y =  the number of shares of Common Stock  as  to  which  this
                       Warrant is to be exercised

                  A =  the  current  fair  market  value  of one share of Common
                       Stock calculated as of the last trading  day  immediately
                       preceding the exercise of this Warrant

                  B =  the Purchase Price

     As used herein, current fair market value of Common Stock as of a specified
date shall mean with  respect to each share of Common  Stock the  average of the
closing bid prices of the Common  Stock on the  principal  securities  market on
which the Common Stock may at the time be traded over a period of five  Business

                                      -3-
<PAGE>

Days  consisting of the day as of which the current fair market value of a share
of Common Stock is being  determined  (or if such day is not a Business Day, the
Business Day next  preceding  such day) and the four  consecutive  Business Days
prior to such day. If on the date for which  current  fair market value is to be
determined  the Common  Stock is not  eligible  for  trading  on any  securities
market, the current fair market value of Common Stock shall be the highest price
per share  which the  Company  could  then  obtain  from a willing  buyer (not a
current  employee or  director)  for shares of Common Stock sold by the Company,
from authorized but unissued shares, as determined in good faith by the Board of
Directors  of the  Company,  unless  prior to such date the  Company  has become
subject to a merger,  acquisition or other  consolidation  pursuant to which the
Company is not the surviving  party, in which case the current fair market value
of the Common  Stock shall be deemed to be the value  received by the holders of
the  Company's  Common Stock for each share  thereof  pursuant to the  Company's
acquisition.

     2.  Delivery  of  Stock  Certificates,   etc.,  on  Exercise.  As  soon  as
practicable  after the exercise of this  Warrant,  and in any event within three
days thereafter,  the Company at its expense (including the payment by it of any
applicable  issue or stamp  taxes)  will  cause to be  issued in the name of and
delivered to the Holder  hereof,  or as such Holder (upon payment by such Holder
of any applicable  transfer taxes) may direct, a certificate or certificates for
the  number of fully  paid and  nonassessable  shares of Common  Stock (or Other
Securities)  to which such Holder  shall be entitled on such  exercise,  in such
denominations  as  may be  requested  by  such  Holder,  plus,  in  lieu  of any
fractional share to which such Holder would otherwise be entitled, cash equal to
such fraction multiplied by the then current fair market value (as determined in
accordance with subsection 1.2) of one full share, together with any other stock
or other securities any property  (including  cash,  where  applicable) to which
such Holder is entitled upon such exercise pursuant to Section 1 or otherwise.

     3.   Adjustment   for   Dividends   in   Other   Stock,   Property,   etc.;
Reclassification, etc. In case at any time or from time to time, all the holders
of Common Stock (or Other Securities)  shall have received,  or (on or after the
record date fixed for the  determination  of  stockholders  eligible to receive)
shall have become entitled to receive, without payment therefor,

          (a) other or additional  stock or other  securities or property (other
     than cash) by way of dividend, or

          (b) any cash (excluding cash dividends  payable solely out of earnings
     or earned surplus of the Company), or

          (c)  other  or  additional  stock  or  other  securities  or  property
     (including   cash)  by  way  of   spin-off,   split-up,   reclassification,
     recapitalization, combination of shares or similar corporate rearrangement,

                                      -4-
<PAGE>


other than additional shares of Common Stock (or Other  Securities)  issued as a
stock dividend or in a stock-split (adjustments in respect of which are provided
for in Section 5), then and in each such case the Holder of this Warrant, on the
exercise  hereof as  provided  in Section 1, shall be  entitled  to receive  the
amount of stock and other  securities and property  (including cash in the cases
referred  to in  subdivisions  (b) and (c) of this  Section 3) which such Holder
would  hold on the date of such  exercise  if on the date  hereof the Holder had
been the holder of record of the number of shares of Common  Stock called for on
the face of this  Warrant  and had  thereafter,  during the period from the date
hereof to and including the date of such exercise,  retained such shares and all
such other or additional stock and other securities and property (including cash
in the  case  referred  to in  subdivisions  (b)  and  (c) of  this  Section  3)
receivable by the Holder as aforesaid  during such period,  giving effect to all
adjustments called for during such period by Section 4.

     4. Adjustment for  Reorganization,  Consolidation,  Merger, etc. In case at
any time or from time to time,  the Company  shall (a) effect a  reorganization,
(b)  consolidate  with or merge into any other  person,  or (c)  transfer all or
substantially all of its properties or assets to any other person under any plan
or arrangement  contemplating the dissolution of the Company, then, in each such
case,  as a condition of such  reorganization,  consolidation,  merger,  sale or
conveyance, the Company shall give at least 30 days notice to the Holder of such
pending  transaction  whereby the Holder  shall have the right to exercise  this
Warrant  prior  to any  such  reorganization,  consolidation,  merger,  sale  or
conveyance. Any exercise of this Warrant pursuant to notice under this paragraph
shall be  conditioned  upon the closing of such  reorganization,  consolidation,
merger,  sale or conveyance  which is the subject of the notice and the exercise
of this Warrant shall not be deemed to have occurred until  immediately prior to
the closing of such transaction.

     5. Adjustment for Extraordinary Events. In the event that the Company shall
(i)  issue  additional  shares  of the  Common  Stock  as a  dividend  or  other
distribution  on  outstanding  Common Stock,  (ii)  subdivide or reclassify  its
outstanding  shares of Common Stock, or (iii) combine its outstanding  shares of
Common Stock into a smaller number of shares of Common Stock, then, in each such
event,  the Purchase  Price  shall,  simultaneously  with the  happening of such
event,  be adjusted by multiplying  the then Purchase  Price by a fraction,  the
numerator  of which  shall be the number of shares of Common  Stock  outstanding
immediately prior to such event and the denominator of which shall be the number
of shares of Common  Stock  outstanding  immediately  after such event,  and the
product so obtained shall  thereafter be the Purchase Price then in effect.  The
Purchase Price, as so adjusted,  shall be readjusted in the same manner upon the
happening of any successive  event or events described herein in this Section 5.

                                      -5-
<PAGE>

The Holder of this Warrant shall thereafter,  on the exercise hereof as provided
in  Section 1, be  entitled  to receive  that  number of shares of Common  Stock
determined  by  multiplying  the number of shares of Common Stock which would be
issuable on such exercise as of immediately prior to such issuance by a fraction
of which (i) the numerator is the Purchase Price in effect  immediately prior to
such issuance and (ii) the  denominator  is the Purchase  Price in effect on the
date of such exercise.

     6.  Further  Assurances.  The  Company  will  take all  action  that may be
necessary or appropriate in order that the Company may validly and legally issue
fully paid and  nonassessable  shares of stock,  free from all taxes,  liens and
charges with respect to the issue thereof, on the exercise of all or any portion
of this Warrant from time to time outstanding.

     7. Notices of Record Date, etc. In the event of

          (a) any taking by the  Company of a record of the holders of any class
     of securities  for the purpose of determining  the holders  thereof who are
     entitled  to  receive  any  dividend  on,  or any right to  subscribe  for,
     purchase or otherwise acquire any shares of stock of any class or any other
     securities or property, or to receive any other right, or

          (b) any capital reorganization of the Company, any reclassification or
     recapitalization of the capital stock of the Company or any transfer of all
     or  substantially  all of the assets of the Company to or  consolidation or
     merger of the Company with or into any other person, or

          (c)  any  voluntary  or   involuntary   dissolution,   liquidation  or
     winding-up of the Company,

then and in each such event the  Company  will mail or cause to be mailed to the
Holder, at least ten days prior to such record date, a notice specifying (i) the
date on which any such record is to be taken for the  purpose of such  dividend,
distribution  or right,  and stating the amount and character of such  dividend,
distribution  or  right,  (ii)  the  date  on  which  any  such  reorganization,
reclassification,    recapitalization,    transfer,    consolidation,    merger,
dissolution, liquidation or winding-up is to take place, and the time, if any is
to be fixed,  as of which  the  holders  of  record  of  Common  Stock (or Other
Securities) shall be entitled to exchange their shares of Common Stock (or Other
Securities) for securities or other property deliverable on such reorganization,
reclassification,    recapitalization,    transfer,    consolidation,    merger,
dissolution,  liquidation or  winding-up,  and (iii) the amount and character of
any stock or other  securities,  or  rights or  options  with  respect  thereto,
proposed to be issued or granted,  the date of such proposed  issue or grant and

                                      -6-
<PAGE>

the  persons or class of persons to whom such  proposed  issue or grant is to be
offered or made. Such notice shall also state that the action in question or the
record date is subject to the  effectiveness  of a registration  statement under
the Securities Act of 1933, as amended (the  "Securities  Act"),  or a favorable
vote of stockholders if either is required. Such notice shall be mailed at least
ten days prior to the date  specified in such notice on which any such action is
to be taken or the record date, whichever is earlier.

     8.  Reservation  of Stock,  etc.,  Issuable on Exercise  of  Warrants.  The
Company will at all times  reserve and keep  available,  solely for issuance and
delivery on the exercise of this  Warrant,  all shares of Common Stock (or Other
Securities) from time to time issuable on the exercise of this Warrant.

     9.  Transfer of  Warrant.  This  Warrant  shall inure to the benefit of the
successors to and assigns of the Holder.  This Warrant and all rights hereunder,
in whole or in part,  is  registrable  at the  office or  agency of the  Company
referred  to below by the  Holder  hereof in  person  or by his duly  authorized
attorney, upon surrender of this Warrant properly endorsed.

     10.  Register of Warrants.  The Company  shall  maintain,  at the principal
office of the Company (or such other office as it may designate by notice to the
Holder  hereof),  a  register  in which the  Company  shall  record the name and
address of the person in whose name this Warrant has been issued, as well as the
name and address of each successor and prior owner of such Warrant.  The Company
shall  be  entitled  to treat  the  person  in whose  name  this  Warrant  is so
registered as the sole and absolute owner of this Warrant for all purposes.

     11. Exchange of Warrant.  This Warrant is exchangeable,  upon the surrender
hereof by the Holder  hereof at the office or agency of the Company  referred to
in Section 10, for one or more new  Warrants of like tenor  representing  in the
aggregate the right to subscribe for and purchase the number of shares of Common
Stock which may be subscribed for purchase hereunder,  each of such new Warrants
to represent  the right to subscribe  for and purchase  such number of shares as
shall be designated by said Holder hereof at the time of such surrender.

                                      -7-
<PAGE>


     12. Replacement of Warrant. On receipt of evidence reasonably  satisfactory
to the Company of the loss,  theft,  destruction  or  mutilation of this Warrant
and, in the case of any such loss,  theft or  destruction  of this  Warrant,  on
delivery of an indemnity agreement or security  reasonably  satisfactory in form
and amount to the Company or, in the case of any such  mutilation,  on surrender
and  cancellation  of this Warrant,  the Company at its expense will execute and
deliver, in lieu thereof, a new Warrant of like tenor.

     13.   Redemption.   (a)  So  long  as  the   Registration   Statement  (the
"Registration  Statement")  required  to  be  filed  by  the  Company  with  the
Securities and Exchange  Commission  (the "SEC") pursuant to Section 2(a) of the
Registration  Rights Agreement,  dated as of June 28, 1996,  between the Company
and Advantage (the  "Registration  Rights Agreement") shall be effective and the
Company  shall be in compliance  in all material  respects with its  obligations
under  the  Registration  Rights  Agreement,  this  Warrant,  the  terms  of the
Preferred Stock and the  Subscription  Agreement,  dated as of June 28, 1996, by
and between the Company and Advantage (the  "Subscription  Agreement"),  in each
case at the time of exercise of the Company's  rights as herein  provided and at
all times  thereafter  until the  Redemption  Date (as herein  defined),  if the
Closing  Price (as defined  below) for 20  consecutive  trading  days ending not
later than the date which is 90 days after the  Registration  Statement is first
ordered  effective by the SEC (the "SEC  Effective  Date") is greater than $6.00
(subject  to  equitable   adjustment   for  stock   splits,   stock   dividends,
subdivisions, combinations, reclassifications and similar events occurring after
the date of original issuance of this Warrant),  then the Company shall have the
right,  exercisable  at any time on or prior to the date  which is 92 days after
the SEC Effective Date, by not less than sixty (60) days prior notice, to redeem
this Warrant at a redemption  price equal to the product obtained by multiplying
(x) the number of shares of Common Stock which may be purchased upon exercise of
this Warrant  (determined without regard to any limitations in Section 1.1(b) of
this  Warrant)  times (y) an amount equal to $.001.  All of this Warrant must be
redeemed, if any of this Warrant is redeemed pursuant to this paragraph (a).

     (b) So  long as the  Registration  Statement  shall  be  effective  and the
Company  shall be in compliance  in all material  respects with its  obligations
under  the  Registration  Rights  Agreement,  this  Warrant,  the  terms  of the
Preferred  Stock  and the  Subscription  Agreement,  in each case at the time of
exercise of the Company's  rights as herein provided and at all times thereafter
until the  Redemption  Date (as herein  defined),  in lieu of redemption of this
Warrant under Section  13(a),  the Company shall have the right,  exercisable at
any time on or prior to the date which is 90 days after the SEC  Effective  Date
on not less than sixty  (60) days  prior  notice,  to redeem  this  Warrant at a
redemption  price equal to the net  redemption  value  (determined in accordance
with Section 1.2) of the entire  unexercised  portion of this Warrant,  in which
event,  the Company  shall pay cash or, at the election of the Company,  issue a
number of shares of Common  Stock  having a Computed  Value equal to, the amount
computed using the following formula:

     R = Y (A-B)

                                      -8-
<PAGE>

     Where:   R =   the net redemption  value, expressed in dollars, of the 
                    entire unexercised portion of this Warrant

              Y =   the number of shares of Common Stock as to which this 
                    Warrant is at the time unexercised

              A =  the  current  fair market  value of one share of Common Stock
                   calculated  as of the last trading day immediately  preceding
                   Redemption Date

              B =  the Purchase Price

All of  this  Warrant  must be  redeemed,  if any of this  Warrant  is  redeemed
pursuant to this paragraph (b).

     (c) If the  Company  shall  desire to  exercise  its  right to redeem  this
Warrant in accordance with paragraph (a) or (b) of this Section,  it shall,  not
later than the latest date on which the Company is  permitted  to exercise  such
redemption  rights in accordance  with paragraph (a) or (b) of this Section,  as
applicable,  and prior to the 60th day  before  the date  fixed for  redemption,
deliver personally (which shall include a telephone line facsimile transmission)
or mail a notice of  redemption  to the  Holder of this  Warrant,  first  class,
postage  prepaid,  at the Holder's  address as it shall appear on the records of
the Warrant register  referred to in Section 10. Any notice mailed in the manner
provided  herein  shall be deemed to have been  duly  given  only when  actually
received by the Holder.  The notice of redemption  shall specify (i) whether the
redemption  is  pursuant  to  paragraph  (a) or (b) of this  Section,  (ii)  the
redemption price or the manner of determining the same, (iii) the date fixed for
redemption,  (iv) the  place  where  this  Warrant  shall be  delivered  and the
redemption  price  paid,  (v) that the  right to  exercise  this  Warrant  shall
terminate at 5:00 p.m.,  New York City time,  on the  business  day  immediately
preceding the Redemption  Date and (vi) in the case of a redemption  pursuant to
paragraph (b) of this  Section,  whether the  redemption  price is to be paid in
cash or shares of  Common  Stock.  The date  fixed  for the  redemption  of this
Warrant shall be the Redemption Date.

     (d) Any right to exercise  this Warrant shall  terminate at 5:00 p.m.,  New
York City time, on the business day immediately  preceding the Redemption  Date.
On and after the  Redemption  Date, the Holder shall have no further rights with
respect to the  portion of this  Warrant so  redeemed  except to  receive,  upon
surrender of this Warrant,  the applicable  redemption  price for the portion of
this Warrant so redeemed.

     (e) From and after the Redemption  Date,  the Company  shall,  at the place
specified in the notice of redemption,  upon  presentation  and surrender to the
Company  by or on behalf of the Holder of this  Warrant,  deliver or cause to be
delivered to or upon the written  order of the Holder a sum in cash equal to the

                                      -9-
<PAGE>

applicable  redemption  price.  From and after the Redemption  Date and upon the
deposit  or setting  aside by the  Company of a sum  sufficient  to redeem  this
Warrant (or, in the case of a redemption  pursuant to Section  13(b),  shares of
Common Stock having a Computed Value equal to the applicable redemption price or
a  combination  of cash and  shares  of  Common  Stock  equal to the  applicable
redemption  price),  this Warrant shall terminate and become void and all rights
hereunder  with  respect  hereto,  except  the right to  receive  payment of the
applicable redemption price, shall cease.

     (f) If the Company elects, in accordance with Section 13(b) to make payment
of all or any  part  of the  applicable  redemption  price  in  fully  paid  and
nonassessable  shares of Common Stock  (hereinafter  sometimes called the "Stock
Payment  Option"),  the Company shall be permitted to exercise the Stock Payment
Option if the issuance of shares of Common Stock upon such exercise of the Stock
Payment  Option  shall have been  authorized  by the Board of  Directors  of the
Company and none of the following conditions are present:

          (i) the  number of shares of Common  Stock  authorized,  unissued  and
     unreserved  for  all  purposes,  or  held  in the  Company's  treasury,  is
     insufficient to pay the redemption price in Common Stock;

          (ii) the  issuance or delivery of shares of Common  Stock  pursuant to
     the Stock Payment  Option or the public resale of such shares by the Holder
     would require  registration with or approval of any governmental  authority
     under any law or regulation, and such registration or approval has not been
     effected or obtained;  provided,  however,  that with respect to compliance
     with the  securities  or blue sky laws of the states of the United  States,
     the  requirements  of this clause (ii) shall be deemed  satisfied if at the
     applicable  time the  Company is in  compliance  with  Section  3(d) of the
     Registration Rights Agreement;

          (iii) the shares of Common  Stock to be issued  upon  exercise  of the
     Stock Payment Option have not been  authorized  for listing,  upon official
     notice of issuance, on any national securities exchange on which the Common
     Stock is then listed;  have not been authorized for listing,  upon official
     notice of issuance,  on the Nasdaq  National  Market or the Nasdaq SmallCap
     Market,  if the Common  Stock is traded on either  such  market or have not
     been  approved  for  quotation  if  the  Common  Stock  is  traded  in  the
     over-the-counter market;

          (iv) the  Computed  Price is less  than  the par  value of the  Common
     Stock;

                                      -10-
<PAGE>


          (v) the Common  Stock is neither (i) listed or admitted for trading on
     a national  securities  exchange  nor (ii)  quoted on the  Nasdaq  National
     Market or the Nasdaq SmallCap Market; or

          (vi)  the  issuance  of  shares  of  Common  Stock in  payment  of the
     applicable  redemption  price would  result in any GFL Person  beneficially
     owning  more than 4.9% of the  Common  Stock,  determined  as  provided  in
     Section 1.1(b) hereof.

     (g) If the Stock  Payment  Option is elected,  the Company  shall issue and
dispatch or cause to be  dispatched to the Holder one or more  certificates  for
the aggregate  number of whole shares of Common Stock determined by dividing the
Computed Price into the net  redemption  value of this Warrant or the portion of
the net  redemption  value of this Warrant to be paid in shares of Common Stock.
No  fractional  shares  will be issued in payment of the  applicable  redemption
price. In lieu thereof, the Company may issue a number of shares of Common Stock
which reflects a rounding up to the next whole number or may pay lawful money of
the United States of America.  The shares of Common Stock issued or to be issued
by the  Company in  payment of the  applicable  redemption  price are  sometimes
referred to hereinafter as the "Payment Shares."

     (h) If the Company  exercises the Stock Payment  Option,  the Company shall
deliver to the Holder, on or prior to the date on which Payment Shares are to be
dispatched to the Holder, an Officers'  Certificate  setting forth (i) the total
amount of the applicable redemption price to which the Holder is entitled,  (ii)
the portion of the  applicable  redemption  price being made in Payment  Shares,
(iii) the number of Payment  Shares  allocable to such  payment,  as  calculated
pursuant to Section  13(g),  (iv) any rounding  adjustment to such number or any
payment necessary to be made pursuant to Section 13(g), (v) a brief statement of
the facts  requiring such adjustment and (vi) a brief statement that none of the
conditions  set  forth in  Section  13(f) has  occurred  and is  existing.  Such
Officer's  Certificate shall be accompanied by the certificates and instruments,
each duly issued in the name of the  Holder,  representing  the Payment  Shares.
Such Officers'  Certificate  shall be conclusive  evidence of the correctness of
the  calculation  of the number of Payment  Shares  allocable to the payments to
which such Officers'  Certificate  relates and of any adjustments to such number
made pursuant to Section 13(g) in the absence of manifest error. In addition, on
or before the pertinent payment date, the Company shall cause the transfer agent
for the Common  Stock to prepare  and issue the  certificates  representing  the
Payment  Shares in the name of the Holder or as  directed  by the Holder  before
being so delivered by the Company.

     (i) The Payment Shares,  when dispatched pursuant to and in compliance with
this Section 13, shall be, and for all purposes  shall be deemed to be,  validly
issued,  fully paid and  nonassessable  shares of Common Stock; the issuance and

                                      -11-
<PAGE>

delivery thereof is in all respects hereby authorized; and the dispatch thereof,
together with lawful money of the United States of America, if any, paid in lieu
of fractional  shares of such Common Stock,  will be, and for all purposes shall
be deemed to be, in full discharge and satisfaction of the Company's  obligation
to pay the applicable redemption price to which such Payment Shares relate.

     (j) As used in this Section 13, the following terms shall have the meanings
provided herein:

          (1) "Closing Price" means the last reported bid price for one share of
     the Common  Stock,  as reported,  quoted or  determined by the first of the
     following  to  apply:  the New York  Stock  Exchange,  the  American  Stock
     Exchange, the Nasdaq National Market and the Nasdaq SmallCap Market.

          (2) "Computed Price" means the arithmetic average of the Closing Price
     for the five  consecutive  trading days ending one trading day prior to the
     Redemption Date.

          (3) "Officer"  means the Chairman or Vice  Chairman of the Board,  the
     Chief Executive Officer, the President,  any Vice President, the Controller
     or the Chief Financial Officer of the Company.

          (4) "Officers' Certificate" means a certificate signed by an Officer.

     14.  Warrant  Agent.  The  Company  may,  by written  notice to the Holder,
appoint  an agent  having an office in the  United  States of  America,  for the
purpose of issuing  Common Stock (or Other  Securities)  on the exercise of this
Warrant  pursuant to Section 1, exchanging this Warrant  pursuant to Section 11,
and replacing this Warrant pursuant to Section 12, or any of the foregoing,  and
thereafter any such issuance, exchange or replacement, as the case may be, shall
be made at such office by such agent.

     15. Remedies. The Company stipulates that the remedies at law of the Holder
of this Warrant in the event of any default or threatened default by the Company
in the  performance  of or compliance  with any of the terms of this Warrant are
not and will not be adequate,  and that such terms may be specifically  enforced
by a decree for the specific performance of any agreement contained herein or by
an injunction against a violation of any of the terms hereof or otherwise.

     16. No Rights or  Liabilities  as a  Stockholder.  This  Warrant  shall not
entitle the Holder  hereof to any voting rights or other rights as a stockholder
of the  Company.  No provision of this  Warrant,  in the absence of  affirmative

                                      -12-
<PAGE>

action by the Holder hereof to purchase  Common Stock,  and no mere  enumeration
herein of the rights or privileges of the Holder hereof,  shall give rise to any
liability  of such  Holder for the  Purchase  Price or as a  stockholder  of the
Company,  whether  such  liability is asserted by the Company or by creditors of
the Company.

     17. Notices,  etc. All notices and other communications from the Company to
the registered  Holder of this Warrant shall be mailed by first class  certified
mail, postage prepaid, at such address as may have been furnished to the Company
in  writing  by such  Holder  or at the  address  shown  for such  Holder on the
register of Warrants referred to in Section 10.

     18. Investment  Representations.  By acceptance of this Warrant, the Holder
represents  to the Company that this Warrant is being  acquired for the Holder's
own  account and for the  purpose of  investment  and not with a view to, or for
sale in  connection  with,  the  distribution  thereof,  nor  with  any  present
intention of  distributing  or selling the Warrant or the Common Stock  issuable
upon exercise of the Warrant.  The Holder  acknowledges that the Holder has been
afforded the  opportunity  to meet with the management of the Company and to ask
questions  of, and receive  answers  from,  such  management  and the  Company's
counsel about the business and affairs of the Company and  concerning  the terms
and  conditions  of the offering of this Warrant,  and to obtain any  additional
information,  to the extent that the Company possessed such information or could
acquire it  without  unreasonable  effort or  expense,  necessary  to verify the
accuracy of the  information  otherwise  obtained by or  furnished to the Holder
hereof in  connection  with the  offering  of this  Warrant.  The Holder  hereof
asserts that it may be considered to be a  sophisticated  investor,  is familiar
with the risks inherent in speculative  investments such as in the Company,  has
such  knowledge  and  experience  in financial  and business  matters that it is
capable of evaluating the merits and risks of the investment in this Warrant and
the Common Stock issuable upon exercise of this Warrant, and is able to bear the
economic risk of the investment.  The Holder  acknowledges  and agrees that this
Warrant and, except as otherwise provided in the Registration  Rights Agreement,
the Common Stock  issuable  upon exercise of this Warrant (if any) have not been
(and at the time of  acquisition  by the Holder,  will not have been or will not
be),  registered  under the Securities  Act or under the securities  laws of any
state,  in reliance  upon certain  exemptive  provisions of such  statutes.  The
Holder  recognizes and acknowledges  that such claims of exemption are based, in
part,  upon the  representations  of the  Holder  contained  herein.  The Holder
further  recognizes and  acknowledges  that because this Warrant and,  except as
provided in the Registration  Rights  Agreement,  the Common Stock issuable upon
exercise of this Warrant (if any) are unregistered, they may not be eligible for
resale,  and  may  only  be  resold  in  the  future  pursuant  to an  effective
registration  statement  under  the  Securities  Act  and any  applicable  state
securities  laws,  or  pursuant  to a valid  exemption  from  such  registration

                                      -13-
<PAGE>

requirements. Unless the shares of Common Stock have theretofore been registered
for resale under the Securities Act, the Company may require,  as a condition to
the  issuance of Common  Stock upon the exercise of this Warrant (i) in the case
of an exercise in accordance  with Section 1.1 hereof,  a confirmation as of the
date of exercise of the Holder's representations pursuant to this Section 18, or
(ii) in the case of an  exercise in  accordance  with  Section  1.2  hereof,  an
opinion  (in form and  substance  reasonably  satisfactory  to the  Company)  of
counsel  reasonably  satisfactory to the Company that the shares of Common Stock
to be issued upon such  exercise may be issued  without  registration  under the
Securities Act.

     19. Legend.  Unless theretofore  registered for resale under the Securities
Act, each certificate for shares issued upon exercise of this Warrant shall bear
the following legend:

     The securities  represented by this  certificate  have not been  registered
     under the  Securities  Act of 1933, as amended.  The  securities  have been
     acquired for investment and may not be sold, transferred or assigned in the
     absence of an effective registration statement for the securities under the
     Securities  Act  of  1933,  as  amended,  or an  opinion  of  counsel  that
     registration is not required under said Act.

     20.  Miscellaneous.  This  Warrant  and any terms  hereof  may be  changed,
waived,  discharged or terminated only by an instrument in writing signed by the
party against which enforcement or such change, waiver, discharge or termination
is sought.  This Warrant shall be construed and enforced in accordance  with and
governed by the  internal  laws of the State of  Delaware.  The headings in this
Warrant are for  purposes of  reference  only,  and shall not limit or otherwise
affect  any of the terms  hereof.  The  invalidity  or  unenforceability  of any
provision  hereof shall in no way affect the validity or  enforceability  of any
other provision.


                                      -14-
<PAGE>

     IN WITNESS WHEREOF,  Hemispherx BioPharma,  Inc. has caused this Warrant to
be executed on its behalf by one of its officers thereunto duly authorized.

Dated:  July 3, 1996                             HEMISPHERX BIOPHARMA, INC.

                                                 By: /s/ William A. Carter
                                                     ---------------------------
                                                 Title:  President

<PAGE>


                              FORM OF SUBSCRIPTION

                   (To be signed only on exercise of Warrant)

TO HEMISPHERX BIOPHARMA, INC.

     1. The undersigned Holder of the attached original, executed Warrant hereby
elects to  exercise  its  purchase  right  under such  Warrant  with  respect to
______________  shares of Common Stock, as defined in the Warrant, of Hemispherx
BioPharma, Inc., a Delaware corporation (the "Company").

     2. The undersigned Holder

     (a)  elects to pay the aggregate  purchase  price for such shares of Common
          Stock (the "Exercise Shares") (i) by lawful money of the United States
          or the  enclosed  certified or official  bank check  payable in United
          States  dollars  to  the  order  of  the  Company  in  the  amount  of
          $___________,  or (ii) by wire  transfer of United States funds to the
          account of the Company in the amount of $____________,  which transfer
          has been made before or simultaneously  with the delivery of this Form
          of Subscription pursuant to the instructions of the Company;

         or

     (b)  elects to receive  shares of Common  Stock having a value equal to the
          value of the Warrant  calculated in accordance with Section 1.2 of the
          Warrant.

     3.   Please issue a stock  certificate  or  certificates  representing  the
          appropriate  number  of  shares  of  Common  Stock  in the name of the
          undersigned or in such other names as is specified below:

         Name:    _____________________________________

         Address: _____________________________________

                  _____________________________________                



Dated:____________ ___, _____                       ____________________________
                                                    (Signature must conform to 
                                                    name of Holder as specified 
                                                    on the face of the Warrant)

                                                   _____________________________

                                                   _____________________________
                                                             (Address)



                        Consent of Independent Auditors

The Board of Directors
Hemispherx Biopharma, Inc.:

We consent to the use of our report  included herein and to the reference to our
firm under the heading "Experts" in the prospectus.


/s/ KPMG Peat Marwick LLP

Philadelphia, Pennsylvania
July 24, 1996



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