INTERFERON SCIENCES INC
S-1/A, S-1, 2000-11-06
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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As filed with the Securities and Exchange Commission on November 6, 2000
                                            Registration No. 333-_______
=====================================================================
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                 AMENDMENT NO. 1
                                   ON FORM S-1
                                   TO FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
          ------------------------------------------------------------

                            INTERFERON SCIENCES, INC.
             (Exact name of registrant as specified in its charter)

                           Delaware 325414 22-2313648

 (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer
Identification incorporation or organization) Classification Number) Number)

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

                                783 JERSEY AVENUE

                             NEW BRUNSWICK, NJ 08901
                                 (732) 249-3250

               (Address,  including zip code,  and telephone  number,  including
          area code, of registrant's principal executive offices)

                            LAWRENCE M. GORDON, ESQ.
                             Chief Executive Officer

                            Interferon Sciences, Inc.

                                783 Jersey Avenue

                         New Brunswick, New Jersey 08901

                                 (732) 249-3250

(Name, address,  including zip code, and telephone number,  including area code,
of agent for service)

                                    Copy to:

                             ROBERT J. HASDAY, ESQ.
                          Duane, Morris & Heckscher LLP

                              380 Lexington Avenue

                            New York, New York 10168

                                 (212) 692-1010

         APPROXIMATE  DATE OF  COMMENCEMENT  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]

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [ ]

         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. [ ]

         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(d) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. [ ]

         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. [ ]

                         <TABLE>
<CAPTION>

                                                    CALCULATION OF REGISTRATION FEE

                                                                           Proposed
    Title of Each Class of                          Proposed Maximum       Maximum
          Securities                Amount to        Offering Price       Aggregate          Amount of
       to be Registered           Be Registered         Per Share       Offering Price   Registration Fee
<S>                                     <C>                <C>          <C>                     <C>
Common Stock, par value $.01         23,312,302(1)        $1.56        $36,367,191            $9,600.94(2)
per share

Common Stock, par value $.01          4,587,518(1)        $1.03        $  4,725,144           $1,247.44(3)
per share

(1)      The securities being registered hereby consist of shares of common stock offered from time to time for resale by certain
     selling security holders, including shares issuable upon exercise of warrants.  Also registered hereunder is such indeterminate
     number of additional shares of common stock that may become issuable pursuant to the anti-dilution provisions of such warrants.
(2)      Previously paid on August 4, 2000.
(3)      Estimated pursuant to Rule 457(c) solely for the purpose of calculating the amount of the registration fee and based upon
     the closing price per share of the common stock, on October 26, 2000, as reported on the OTC Bulletin Board, of $1.03.

         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.
</TABLE>

<PAGE>



Information  in this  prospectus is not complete and may be changed.  We may not
sell these  securities  until the  registration  statement filed with the SEC is
effective.  This  is  not  an  offer  to  sell  these  securities  and it is not
soliciting an offer to buy these securities in any state where the offer or sale
is not permitted.

                        PROSPECTUS SUBJECT TO COMPLETION

                              November _____, 2000

                            INTERFERON SCIENCES, INC.

                        27,899,820 SHARES OF COMMON STOCK

         We have prepared this  prospectus to allow the selling  stockholders we
identify  herein to sell up to  27,899,820  shares of our  common  stock  (which
includes  15,069,569 shares of common stock issuable upon exercise of warrants).
We will not receive  any of the  proceeds  from the sale of common  stock by the
selling stockholders.  However, we could receive up to $21,122,024 upon exercise
of the warrants.  Any proceeds we receive from the exercise of the warrants will
be used for general corporate purposes.

         We expect that sales made pursuant to this prospectus will be made

-        in broker's transactions,
-        in transactions directly with market makers, or
-        in negotiated sales or otherwise

         The shares may be sold at current market prices or at negotiated prices
at the time of the sale.  We will pay the  expenses  incurred  to  register  the
shares  for  resale,  but the  selling  stockholders  will pay any  underwriting
discounts,  concessions,  and brokerage commissions  associated with the sale of
their shares.

         The selling  stockholders and the brokers and dealers that they utilize
may be deemed to be  "underwriters"  within the meaning of the securities  laws,
and any  commissions  received  and any profits  realized by them on the sale of
shares may be considered to be underwriting compensation.

         Our common stock is traded on the OTC  Bulletin  Board under the symbol
"IFSC." On October 26, 2000, the last reported sale price of our common stock on
the OTC Bulletin Board was $1.03 per share.

Investing in our common stock involves a high degree of risk. See "Risk Factors"
beginning on page 4.

Neither the SEC nor any state  securities  commission  has  approved  the common
stock nor have these  organizations  determined that this prospectus is accurate
or complete. Any representation to the contrary is a criminal offense.

         The date of this prospectus is November __, 2000.

         This prospectus contains forward-looking  statements relating to future
events  or  our  future  financial   performance.   These  statements  are  only
predictions  and actual events or results may be materially  different  from our
predictions.  In evaluating  these  statements,  you should consider the various
factors identified in this prospectus,  including but not limited to the matters
set forth under the heading "Risk  Factors," which could cause actual results to
differ materially from those indicated by such forward-looking statements.

         You should rely only on the  information  incorporated  by reference or
provided in this  prospectus or any  prospectus  supplement.  Neither we nor the
selling  stockholders  have authorized anyone else to provide you with different
information.  Neither  we nor the  selling  stockholders  are making an offer of
these  securities in any state where the offer is not permitted.  You should not
assume that the  information in this prospectus is accurate as of any date other
than the date on the front of the prospectus.


<PAGE>


                                     SUMMARY

         This  summary  highlights   information  contained  elsewhere  in  this
prospectus.  You should read this entire prospectus carefully before deciding to
acquire shares of our common stock.  This  prospectus  contains  forward-looking
statements,  which involve  risks and  uncertainties.  Our actual  results could
differ materially from those anticipated in these forward-looking  statements as
a result of certain factors,  including those set forth under "Risk Factors" and
elsewhere  in this  prospectus.  All  references  to  "we,"  "our,"  "us,"  "our
company,"  "the  Company,"  or "ISI"  in this  prospectus  refer  to  Interferon
Sciences, Inc. and its subsidiary.

                                   The Company

         Interferon Sciences, Inc. is a biopharmaceutical company which studies,
manufactures,  and sells  pharmaceutical  products based on its highly purified,
multispecies,  natural source alpha interferon ("Natural Alpha Interferon"). Our
ALFERON N  Injection(R)  (Interferon  Alfa-n3)  product has been approved by the
United States Food and Drug Administration  ("FDA") for the treatment of certain
types of genital warts and we have studied its potential use in the treatment of
human  immunodeficiency  virus  ("HIV"),  hepatitis C virus  ("HCV"),  and other
indications.  We have also  studied  ALFERON N Gel(R) and  ALFERON  LDO(R),  our
topical and oral  formulations  of Natural Alpha  Interferon,  for the potential
treatment of viral and immune system  diseases.  In addition,  we are seeking to
enter into  collaborations  with  companies  in the areas of cancer,  infectious
diseases, and immunology. Our strategy is to utilize our expertise in regulatory
affairs, clinical trials, manufacturing, and research and development to acquire
equity participations in early stage companies.  Our principal executive offices
are located at 783 Jersey  Avenue,  New  Brunswick,  New Jersey  08901,  and our
telephone number is (732) 249-3250.

<TABLE>
<CAPTION>

                                  The Offereing
<S>                                     <C>

Shares Offered......................27,899,820 shares of common stock to be offered by the selling stockholders named in this
                                    prospectus.  The shares include 15,069,569 shares that we will issue to the selling stockholders
                                    on exercise of warrants held by them.

Offering Price......................Determined at the time of sale by the selling stockholders.

Shares Outstanding..................17,949,897 at October 31, 2000

Use of Proceeds.....................We will not receive any of the proceeds of the shares offered by the selling stockholders

                                    Any proceeds we received from the sale of shares on exercise of warrants by the selling
                                    stockholders will be used for general corporate purposes.  See "Use of Proceeds."

OTC Bulletin Board Symbol...........IFSC

Risk Factors........................Investing in our common stock involves a high degree of risk.  See "Risk Factors" beginning on
                                    page 4.
</TABLE>




                                  RISK FACTORS

         You should  carefully  consider the following  factors,  as well as the
other information in this prospectus, before purchasing our common stock.

         You should be  cautioned  that the  following  important  factors  have
affected,  and in the future  could  affect,  our actual  results.  There may be
additional  factors  not  discussed  in this  prospectus  that could also affect
future results. These factors could cause our future financial results to differ
materially  from those expressed in any  forward-looking  statements made by us.
Forward-looking statements may relate to such matters as:

-        our ability to generate future revenues;

-        the potential commercialization of our products; and

-        our ability to enter into future business collaborations and marketing
         partnerships.

         Forward-looking  statements may include words such as "will," "should,"
"could,"  "anticipate,"  "believe," "plan," "estimate,"  "expect," "intend," and
other similar  expressions.  This list does not  constitute all factors that you
should consider prior to making an investment  decision in our  securities.  You
should  also not assume  that the  information  contained  herein is complete or
accurate in all respects after the date of this filing.  We disclaim any duty to
update the statements contained herein.

History Of Operating Losses; Uncertainty Of Future Financial Results

         We have experienced significant operating losses since our inception in
1980. For the years ended December 31, 1999,  1998, and 1997, we had losses from
operations of $5.4 million, $20.8 million, and $22.4 million,  respectively.  We
expect such losses to continue  until  significant  sales of ALFERON N Injection
occur, or we enter into successful collaborations with other companies. Although
we received  approval to market ALFERON N Injection for the treatment of genital
warts from the FDA in October 1989 and from certain foreign countries many years
ago, we have had only  limited  revenues  from the sale of ALFERON N  Injection.
There can be no  assurance  that sales of ALFERON N Injection  will ever reach a
level that will enable us to operate  profitably.  Future financial results will
be affected by, among other things, the following factors:

-        our ability to increase the market for ALFERON N Injection;

-        the willingness of potential strategic partners to market ALFERON N
         Injection;

-        our ability to enter into collaborations with promising companies;

-        the costs related to any new collaborations with other companies;

-        the progress of our research and development programs;

-        the progress of our preclinical and human clinical studies;

-        the time, costs, and ability of obtaining regulatory approvals for
         those products subject to such approvals;

-        our ability to protect our proprietary rights;

-        the costs of protecting our patent claims;

-        competing technological and market developments;

-        manufacturing costs associated with our various products and potential
         products; and

-        the costs of commercializing and marketing our products.

Need For Additional Capital

         Additional funds will be required to:

-        enable us to continue our research and development activities;

-        conduct preclinical and clinical studies;

-        fund our obligations in any new collaborations with other companies;
         and

-        manufacture and market our products.

Management is likely to pursue various financing alternatives to obtain
these funds, including:

-        equity issuances;

-        lease financing;

-        collaborative arrangements with partners; and/or

-        asset-based financing.

         The level of expenditures  required for these activities will depend in
part on the  extent  to which we  develop,  manufacture,  and  market  ALFERON N
Injection   independently   or  with  other  companies   through   collaborative
arrangements.  Our future  capital  requirements  will also depend,  among other
things, on one or more of the following factors:

-        our obligations in any new collaborations;

-        the extent and progress of our research and development programs;

-        the progress of preclinical and clinical studies;

-        the time and costs of obtaining regulatory clearances for those
         products subject to such clearances;

-        the costs involved in filing, protecting, and enforcing patent claims;

-        competing technological and market developments;
-        the cost of capital expenditures at our manufacturing facilities;

-        the costs of marketing and commercializing our products; and

-        our ability to attract partners to help market and/or manufacture our
         products.

         There is no assurance that funding to carry on these activities will be
available at all or on favorable terms to permit successful commercialization of
ALFERON N  Injection  or of any  products  which we  collaborate  on with  other
companies

        If adequate funds are not available, we may be required to:

-        curtail one or more of our research and development programs;

-        curtail manufacturing and commercialization programs; and/or

-        obtain funds through arrangements with collaborative partners or
         others, if possible.

         These  arrangements may require us to relinquish  certain technology or
product rights, including patent and other intellectual property rights.

Equity Participations

         Our strategy of seeking to acquire equity participations in early stage
companies subjects us to all of the risks inherent in such companies, including:

-       the  uncertainty  of whether such  companies  can obtain  require
        funding on acceptable terms or at all;

-       the  uncertainty  as to whether such  companies  can complete the
        research and development of a commercially viable product;

-       the risk that  such  companies  may not be able to  adequately  protect
        their intellectual  property,  or that their technology will infringe
        the intellectual property of third parties; and

- the risk that superior technologies will be developed.

         There are also other risks  involved in  investing  in such  companies,
including:

- the limited  basis on which we can evaluate the business and prospects of such
companies;

- we will have to compete  with  others  seeking to  acquire  interests  in such
companies,  and we may not be able to acquire such interests on terms acceptable
to us or at all;

- since we  contemplate  generally not acquiring a controlling  interest in such
companies, any success we have will be largely dependent upon the efforts of the
management of such companies, over which we may have limited control; and

- the  uncertainty  of  whether we will have an  acceptable  exit  strategy.  No
Guaranteed Source Of Required Materials

         We use a number of essential  materials in the  production of ALFERON N
Injection,  including  human white blood cells,  and we have a limited number of
sources from which to obtain such materials. We do not have long-term agreements
for the supply of any of such materials.  There can be no assurance we can enter
into long-term supply agreements  covering  essential  materials on commercially
reasonable  terms,  if at all.  If we are  unable to  obtain  the  required  raw
materials, we may be required to scale back our operations or stop manufacturing
ALFERON N Injection.  The costs and  availability  of products and  materials we
need for the  commercial  production of ALFERON N Injection  and other  products
which we may  commercially  produce are subject to  fluctuation  depending  on a
variety of factors beyond our control, including competitive factors, changes in
technology,  and FDA and  other  governmental  regulation  and  there  can be no
assurance  that we will be able to obtain such  products and  materials on terms
acceptable to us or at all.

Limited Marketing Program

         In  June  1998,   we  entered   into  an  agreement   with   Integrated
Commercialization  Solutions,  Inc.  ("ICS"),  a subsidiary  of Bergen  Brunswig
Corporation,  pursuant to which ICS became the sole United States distributor of
ALFERON  N  Injection.  ICS also  provides  clinical  and  product  information,
reimbursement  information  and services,  and  management of patient  assistant
services. Although we currently have marketing arrangements for the distribution
of ALFERON N Injection in Mexico and Germany,  substantially all of the revenues
derived from the sales of ALFERON N Injection are in the United  States.  Unless
we successfully  develop our own sales force or enter into additional  marketing
arrangements  with other  companies,  we will be dependent on the ability of our
current  distributors  to sell  sufficient  quantities of ALFERON N Injection to
allow us to operate  profitably.  There can be no assurance that we will be able
to develop our own sales force or enter into additional  marketing agreements on
acceptable terms, if at all, or that we will be able to successfully  market and
sell ALFERON N Injection or any other product.

Products Under Development

         We are currently  evaluating the development of ALFERON N Injection for
the treatment of multiple  sclerosis  and certain  types of cancer.  We are also
planning  additional  clinical  trials in order to expand the potential  uses of
Alferon N Injection for the treatment of human papilloma virus ("HPV") and other
related  areas.  However,  there can be no assurance that these products will be
cost-effective,  safe, or effective treatments for these diseases,  and there is
no assurance  of receiving  regulatory  approvals to market these  products.  We
cannot market such  products  until such  approvals  are obtained.  Even if such
approvals are  obtained,  there can be no assurance  that any of these  products
will be successful or will produce significant  revenues or profits. Our ability
to become profitable depends on the successful  commercial  development of these
products or our entering into successful collaborations with other companies.

Potential Side Effects

         We  manufacture  and sell  only one FDA  approved  product,  ALFERON  N
Injection for the  intralesional  treatment of refractory or recurring  external
genital  warts in adults.  In clinical  trials  conducted  for the  treatment of
genital warts with ALFERON N Injection, patients did not experience serious side
effects; however, there can be no assurance that unexpected or unacceptable side
effects will not be found in the future for this use or other  potential uses of
ALFERON N Injection or for any other  product  which we may develop  which could
threaten or limit such product's usefulness.

Risk Of Product Liability

         Our products have undergone or will undergo extensive  clinical testing
prior to the granting of any  regulatory  approval for the purpose,  among other
things,  of determining  the safety of such products.  We may sell products that
cause unexpected adverse reactions or result in an allergic or other reaction or
which are alleged to have unacceptable  adverse side effects.  Product liability
risk  is  inherent  in the  testing,  manufacture,  marketing,  and  sale of our
products,  and  there  can be no  assurance  that  we  will  be  able  to  avoid
significant product liability exposure.  Such liability might result from claims
made directly by consumers or by pharmaceutical companies or others selling such
products. It is impossible to predict the scope of injury or liability from such
unexpected  reactions,  or the  measure  of  damages  that might be imposed as a
result of any  claims or the cost of  defending  such  claims.  We have  product
liability  insurance  in the amount of  $10,000,000.  Although  we believe  this
amount is  sufficient,  there is no  assurance  that we will be able to maintain
such  coverage,  and even if we do  maintain  it,  in the  event  that we become
subject to liability  claims in excess of any insurance  coverage we may have in
effect,  we may not have  sufficient  assets or liquidity to satisfy such claims
which could result in the inability to continue our operations. Furthermore, any
published  reports or rumors  suggesting  a link between any of our products and
injury to a person could be expected to materially  impair our ability to market
such product.

Substantial Competition

         Many of our potential competitors are among the largest  pharmaceutical
companies in the world, are well known to the public and the medical  community,
and have substantially  greater financial resources,  product  development,  and
manufacturing and marketing capabilities than we or our marketing partners have.

         We  currently  compete  with   Schering-Plough   Corp.'s   ("Schering")
injectable  recombinant  interferon  product for the treatment of genital warts.
Minnesota  Mining  &  Manufacturing  Co.  also  received  FDA  approval  for its
immune-response modifier,  Aldara(R), a self-administered topical cream, for the
treatment of genital  warts.  ALFERON N Injection  also competes with  surgical,
chemical,  and other  methods of treating  genital  warts.  We cannot assess the
impact products developed by our competitors or advances in other methods of the
treatment of genital  warts will have on the  commercial  viability of ALFERON N
Injection.

         If and when we obtain additional approvals of uses of our products,  we
expect to compete primarily on the basis of product  performance.  Our potential
competitors  have  developed or may develop  products  (containing  either alpha
interferon or other  therapeutic  compounds) or other  treatment  modalities for
those uses. In the United States,  two recombinant forms of beta interferon have
been approved for the treatment of relapsing-remitting multiple sclerosis. There
can be no  assurance  that,  if we are able to  obtain  regulatory  approval  of
ALFERON N Injection  for the  treatment of new  indications,  we will be able to
achieve any significant  penetration  into those markets.  In addition,  because
certain of the competitive products are not dependent on a source of human blood
cells, such products may be able to be produced in greater volume and at a lower
cost than ALFERON N Injection.

         Currently,  our  wholesale  price on a per  unit  basis  of  ALFERON  N
Injection is substantially higher than that of the competitive recombinant alpha
interferon products.

         Other companies may succeed in developing  products earlier than we do,
obtaining  approvals  for such products from the FDA more rapidly than we do, or
developing products that are more effective than those we may develop.  While we
will  attempt  to  expand  our  technological  capabilities  in order to  remain
competitive,  there can be no assurance that research and  development by others
or other medical advances will not render our technology or products obsolete or
non-competitive  or result in  treatments  or cures  superior  to any therapy we
develop.

Potential Patent Infringement Claims

         On March 5, 1985, the United States Patent and Trademark  Office issued
a patent to  Hoffmann-La  Roche,  Inc.  ("H-LR")  claiming  purified human alpha
(leukocyte) interferon  (regardless of how it is produced).  F. Hoffmann-LaRoche
Ltd. ("Roche"),  the parent of H-LR, also has been issued patents covering human
alpha  interferon in many countries  throughout the world. As of March 31, 1995,
we obtained a non-exclusive perpetual license from H-LR and Roche (collectively,
"Hoffmann") that grants us the worldwide rights to make, use, and sell,  without
a potential patent infringement claim from Hoffmann,  any formulation of Natural
Alpha Interferon.  The license permits us to grant marketing rights with respect
to Natural Alpha  Interferon  products to third  parties,  except that we cannot
grant marketing rights with respect to injectable  formulations of Natural Alpha
Interferon  in any country in which  Hoffmann has patent  rights  covered by the
license  to any  third  party not  listed  on a  schedule  of  approximately  50
potential  marketing  partners  without the consent of Hoffmann,  which  consent
cannot be unreasonably withheld. There can be no assurance that we will not want
to grant such marketing rights to a third party not listed on such schedule,  or
that  Hoffmann  will not  withhold the required  consent.  In addition,  if such
license were terminated,  we may be subject to a patent infringement  lawsuit by
Hoffmann if we continue to market Natural Alpha Interferon  products.  If such a
suit were brought, we would have to either counterclaim to attempt to invalidate
the Hoffmann patents or prove that we do not infringe such patents.

         In addition, there may have been other patent applications filed in the
United States and in foreign countries, some of which may have been filed by our
potential competitors,  with respect to the technologies and/or products that we
may require to produce our current and proposed products. If any of such patents
issue in the United  States or in foreign  countries  in a form that  covers our
products  or  processes,  we would be  required  to obtain  licenses  under such
patents in connection with the domestic and international  commercialization  of
such products. There can be no assurance that we could obtain licenses under any
of such  patents if so issued,  particularly  if they were  issued to  companies
directly in competition with us, or that, even if we could obtain  licenses,  we
could do so on commercially reasonable terms.

         If the sale or use of any of our products were to become the basis of a
patent  infringement  lawsuit,  assuming  we  could  not  obtain  a  license  on
satisfactory terms, we may be required to incur substantial litigation expenses,
and such litigation could also consume substantial  management time, which could
have a material  adverse  effect upon our  financial  condition  even if we were
successful in the litigation.  If we were not successful in such litigation,  we
may be required  to pay a royalty  for the use of the  claimed  patents or cease
producing  the  products  and  redevelop  the products in such a way as to avoid
infringing  any claimed  patent  rights.  There can be no assurance in such case
that we could  obtain a license  under such patents on  commercially  reasonable
terms or at all, or that we could  successfully  redevelop  the products to fall
outside the scope of the claim.

         Our policy is to seek  licenses  if we  believe  that the terms of such
licenses,  when  weighed  against  the expense and  uncertainties  of  potential
litigation, are cost effective.

Possible Inability To Protect Technology

         To a significant  extent,  our ability to protect  rights in any of our
products  or  technology  we may  develop  depends  upon our  ability  to obtain
suitable patent or similar  protection.  Our ability to obtain patents,  and the
nature,  extent, and enforceability of the intellectual property rights that are
obtained as a result of our research,  involve complex legal and factual issues.
New  technology  and  products  that we  develop  may  not  qualify  for  patent
protection or, if they do qualify,  may be subject to challenge or to protracted
judicial  proceedings.  In addition,  we may  determine  not to seek  additional
patent or other  protection  for our  technology or products.  It is not certain
that  other  patents  will be issued  or, if  issued,  that they will  afford us
protection from  competitive  products.  Although our practice is to require our
technical and scientific  employees and  consultants to execute  confidentiality
agreements  covering  proprietary  information,  there can be no assurance  that
others will not  independently  make similar  discoveries  or  otherwise  obtain
access to our  proprietary  information.  In addition,  we have a  non-exclusive
license  agreement  with  Hoffmann  that enables us to sell ALFERON N Injection.
There can be no  assurance  that  Hoffmann  has not  granted or will not grant a
similar  license  to  another  company  with  considerably   greater  financial,
technical,  and marketing resources than we have or that Hoffmann will not enter
the market itself with a competitive product.

         While we have been  issued a United  States  patent for  Natural  Alpha
Interferon  produced from human  peripheral  blood leukocytes and our production
process and have several patent applications pending, it is possible that others
have or may develop  equivalent or superior products or technologies which would
not fall within the scope of our patent claims or which might involve inventions
similar  in scope  to those of ours for  which  patent  or  similar  rights  are
obtained by others prior to the time that we are able to do so.

Regulatory Approvals

         The production  and marketing of our products in the United States,  as
well  as our  ongoing  research  and  development  activities,  are  subject  to
regulation by governmental agencies, most significantly the FDA. Such regulation
includes  requirements for obtaining FDA approval prior to marketing each of our
products in the United  States.  In order to obtain such FDA  approval,  we must
demonstrate, among other things, the safety and efficacy of each product through
pre-clinical and clinical testing.  Obtaining such approvals is a time-consuming
process and requires the expenditure of substantial resources.  Each facility in
which the products are produced and packaged,  whether operated by us or a third
party,  must meet the FDA's standards for current good  manufacturing  practices
and must also be approved prior to marketing any product produced or packaged in
such facility.  Any  significant  change in the  production  process that may be
commercially required, including changes in sources of certain raw materials, or
any change in the location of the  production  facilities  will also require FDA
approval. To the extent we do not handle a specific portion of the manufacturing
process  for  a  product,  we  must  similarly  receive  FDA  approval  for  the
participation by such third party in the manufacturing  process. For example, we
have an agreement with Abbott  Laboratories,  Inc.  ("Abbott") pursuant to which
Abbott formulates and packages ALFERON N Injection. We presently have a biologic
establishment  license  for  the  facilities  in  which  we  produce  ALFERON  N
Injection, which includes the facilities in which Abbott formulates and packages
ALFERON N Injection.  If our or Abbott's present  manufacturing  facilities were
damaged or destroyed or our agreement with Abbott were terminated,  there can be
no assurance  that FDA approval  could be obtained for another  facility or that
another  facility  could  be  built  and  approved  on  a  timely  basis  or  on
commercially  reasonable terms.  Delays in obtaining,  or the failure to obtain,
any necessary  regulatory  approvals could have a material adverse effect on our
ability to develop,  produce, and sell our products.  In addition, if we fail to
comply in any respect with FDA  requirements  with respect to the production and
marketing of biological  drug products,  we could be subject to potential  civil
and criminal  penalties.  In addition,  our products could be subject to seizure
and other civil enforcement  action.  Because of the uncertain nature of many of
these  requirements,  there can be no assurance that regulatory problems of this
type will not occur.

Foreign Regulatory Approvals

         To market our products outside of the United States,  we are subject to
numerous and varying  foreign  regulatory  requirements,  implemented by foreign
health  authorities,  governing the design and conduct of human clinical  trials
and marketing  approval.  The approval  procedure varies among countries and can
involve additional testing,  and the time required to obtain approval may differ
from that  required  to obtain  FDA  approval.  At  present,  foreign  marketing
authorizations   are  applied  for  at  a  national  level,   although   certain
registration  procedures  are available  within the European Union (the "EU") to
companies  wishing to market a product in more than one EU member country.  If a
regulatory authority is satisfied that adequate evidence of safety, quality, and
efficacy has been presented,  marketing  authorization is usually  granted.  The
foreign  regulatory  approval  process includes all of the risks associated with
obtaining  FDA  approval  set forth  above.  Approval by the FDA does not ensure
approval by other  countries.  There can be no assurance  that our products will
receive such  approvals.  In addition,  under certain  circumstances,  we may be
required  to obtain FDA  authorization  to export  products  for sale in foreign
countries. For instance, in most cases, we may not export products that have not
been  approved by the FDA unless we first obtain an export  permit from the FDA.
However,  these FDA export  restrictions  generally do not apply if our products
are  exported  in  conformance   with  their  United  States  approvals  or  are
manufactured  outside the United States. At the present time, we do not have any
foreign manufacturing facilities.

Royalty Obligations

         We have entered into certain  license  agreements  pursuant to which we
are obligated to pay royalties  based upon the  commercial  exploitation  of our
products. Royalty payments under such license agreements with respect to ALFERON
N Injection,  ALFERON N Gel, and ALFERON LDO could aggregate up to 9.5%,  13.5%,
and  19.5%,  respectively,  of our net  sales  of such  products.  Such  royalty
obligations, together with any additional royalties that we may become obligated
to pay in the future,  may limit our  marketing  strategies  and prevent us from
obtaining  adequate  profit margins and could have a material  adverse effect on
the commercial exploitation of our products.

         In connection with the acquisition of certain intellectual property and
technology rights from GP Strategies Corporation ("GP Strategies"), we agreed to
pay GP Strategies a royalty of $1 million. Such amount is payable if and when we
generate income before income taxes, limited to 25% of such income before income
taxes per year until such  amount is paid in full.  Since we have not had income
before taxes, we have not made any payments to GP Strategies.

Retention Of Key Personnel

         Because of the  specialized  scientific  nature of our business,  it is
necessary  to attract and retain  personnel  with a wide  variety of  scientific
capabilities.  Competition  for  such  personnel  is  intense.  There  can be no
assurance  that we  will  continue  to  attract  and  retain  personnel  of high
scientific  caliber.  Other than Mr. Gordon,  our Chief Executive  Officer,  Dr.
Schutzbank, our President, and Dr. Ronel, our Chairman of the Board, none of our
other key employees have employment agreements.  We do not maintain key man life
insurance  for  any of our  key  employees  and do not  intend  to  obtain  such
insurance.  If we lose the services of certain of our employees, it could have a
material adverse effect on our operations.

Preferred Stock

         Our  charter  allows us to issue up to  5,000,000  shares of  preferred
stock, the rights, preferences,  qualifications,  limitations,  and restrictions
that may be fixed by the Board of  Directors  without any further vote or action
by the  stockholders.  The ability to issue the  preferred  stock could have the
effect of delaying, deferring, or preventing the change of control of ISI.

Options And Warrants

         As of October 31,  2000,  we had  outstanding  options and  warrants to
purchase  17,098,326  shares of common  stock.  For the life of the  outstanding
options and warrants, the holders are given, at nominal cost, the opportunity to
profit  if the price for the  common  stock in the  public  market  exceeds  the
exercise  price  of the  options  or  warrants,  without  assuming  the  risk of
ownership,  with a resulting dilution in the interest of other security holders.
If the public  market price of the common stock does not rise above the exercise
price  of the  options  or  warrants  during  the  exercise  period,  then  such
securities  will  expire  worthless.  As long  as the  outstanding  options  and
warrants remain  unexercised,  the terms under which we could obtain  additional
capital may be adversely affected. Moreover, the holders of these securities may
be expected to exercise them at a time when we would, in all likelihood, be able
to obtain any needed  capital by a new offering of our  securities on terms more
favorable than those provided by these securities.

Possible Volatility Of Stock Price; Limited Liquidity; Absence Of Dividends

         The market  price of our common  stock may  experience  a high level of
volatility,  as frequently occurs with publicly traded emerging growth companies
and biosciences  companies.  The market price of our stock may be  significantly
impacted, among other things, by:

- announcements of technological innovations or new commercial products by us or
our competitors;

- developments or disputes concerning patent or proprietary rights;
- publicity  regarding actual or potential  medical results relating to products
under development by us or our competitors;

- general  regulatory  developments  affecting  our  products in both the United
States and foreign countries;

- market conditions for emerging growth companies and biosciences  companies and
economic and other internal and external factors;

- period-to-period fluctuations in financial results; and

- our  ability to enter  into  collaborations  with third  parties to market our
products.

         We have never  declared or paid any cash  dividends on our common stock
and do not intend to do so for the foreseeable future.

Shares Eligible For Future Sale; Registration Rights

         As of October 31, 2000, we had 17,949,897  outstanding shares of common
stock,  approximately  5.1 million of which are available for sale in the public
marketplace  and the remaining  approximately  12.8 million of which will become
available for sale on the date of this  Prospectus.  There were also outstanding
stock  options to purchase an aggregate  of 1,937,380  shares of common stock at
prices ranging from $.25 to $1.50 per share and warrants to purchase  15,160,946
shares of common stock at prices  ranging from $.66 to $48 per share.  Shares of
common stock that may be issued under  outstanding  options and warrants will be
available for sale in the public  markets.  In addition,  certain holders of the
common stock have certain demand and piggyback registration rights pursuant to a
registration rights agreement between us and these holders. No prediction can be
made as to the  effect,  if any,  that  sales of shares  of common  stock or the
availability  of such  shares  for sale  will have on the  market  prices of the
common stock  prevailing  from time to time. The  possibility  that  substantial
amounts of common stock may be sold in the public  market may  adversely  affect
prevailing  market prices for the common stock. This could impair our ability to
raise  capital  through  the  sale of  equity  securities.  Further,  if we were
required  to include  shares,  through  exercise  of the  outstanding  piggyback
registration  rights,  in a  company-initiated  registration,  the  sale of such
shares could have a material  adverse effect on our ability to raise  additional
capital.

                    PRICE RANGE OF COMMON STOCK AND DIVIDENDS

         Our  Common  Stock is  traded on the OTC  Bulletin  Board and is quoted
under the symbol IFSC. On April 13, 1999, the Common Stock was delisted from the
NASDAQ  National   Market  System  for  failure  to  maintain   certain  listing
requirements. The following table sets forth for each period indicated, the high
and low sales  prices for the Common  Stock as reported  on the NASDAQ  National
Market System  through April 13, 1999 and on the OTC Bulletin  Board  commencing
April 14, 1999.

<TABLE>
<CAPTION>

         All prices have been  adjusted for a  one-for-five  reverse stock split
effective as of January 6, 1999.

                                     2000                          1999                             1998
                                     ----                          ----                             ----
Quarter                      High          Low             High             Low             High            Low
-------                      ----          ---             ----             ---             ----            ---
<S>                           <C>          <C>              <C>               <C>
First                      $5 5/8        $ 5/16          $2  1/2          $  3/4         $46  7/8     $18 29/32
Second                      3            1 1/8            1                  3/16         35 15/16      4 17/32
Third                       2 9/16       1 5/16              1/2             7/32          6  1/4       2  1/2
Fourth (through
October 31, 2000)           1 1/4        1 1/32              15/32           1/8           8  3/4       1 13/32


         As of October 15, 2000, the Company had 1,300 stockholders of record.
</TABLE>

         We have not paid any  dividends on our Common Stock since our inception
and do not contemplate  paying  dividends on our Common Stock in the foreseeable
future.

                                 USE OF PROCEEDS

         We will not receive any proceeds  from the sale of the shares of common
stock by the selling stockholders. If all the warrants are exercised in full, we
will receive up to approximately  $21.1 million,  which will be used for general
corporate  purposes.  There  can be no  assurance,  however,  that  the  selling
stockholders will exercise the warrants in full or at all.


<PAGE>


                             SELECTED FINANCIAL DATA

 .........The   selected  financial  data  presented  below  under  the  captions
"Selected Income  Statement Data" and "Selected  Balance Sheet Data" for, and as
of the end of, each of the years in the  five-year  period  ended  December  31,
1999,  are derived from the  consolidated  financial  statements  of the Company
which financial statements have been audited by KPMG LLP, independent  certified
public  accountants.  The consolidated  financial  statements as of December 31,
1999 and 1998 and for each of the years in the three-year  period ended December
31, 1999, and the report thereon, are included elsewhere in this Prospectus. The
selected  unaudited  financial  data as of June 30,  2000 and for the six months
ended  June 30,  2000 and 1999,  are  derived  from the  unaudited  consolidated
financial  statements  of the  Company  which  are  included  elsewhere  in this
Prospectus  and  include all  adjustments  consisting  only of normal  recurring
adjustments  necessary  for a fair  presentation  of the  operating  results and
financial position as of and for the unaudited  periods.  The selected financial
data should be read in conjunction with the consolidated financial statements as
of December 31, 1999 and 1998 and for the years ended  December  31, 1999,  1998
and 1997,  the related notes and the audit report,  appearing  elsewhere in this
Prospectus,  which contains an explanatory paragraph that states the Company has
suffered  recurring  losses from operations and has an accumulated  deficit that
raise  substantial  doubt about its ability to continue as a going concern.  The
consolidated financial statements and selected financial data do not include any
adjustments  that  might  result  from  that   uncertainty.   See  "Management's
Discussion and Analysis of Financial  Condition and Results of  Operations"  and
"Consolidated Financial Statements."

<TABLE>
<CAPTION>


                                      Six Months Ended                 Year Ended December 31,
                                           June 30,
                               ------------------   ---------------------------------------------
                                    (Thousands of dollars except per share data)

                                 2000     1999       1999      1998       1997     1996    1995
                                       (restated)
                                 ----     ----        ----     ----       ----     ----    -----
<S>                             <C>       <C>          <C>     <C>        <C>      <C>      <C>
Selected Income                   (unaudited)
 Statement Data:

  Revenues                     $   321  $   986    $2,329   $  2,007   $  2,956  $ 2,092 $ 1,296
  Cost of goods sold and
   excess/idle production
   costs                           655    2,224     3,552      6,533      1,858    1,400   3,076

  Research and development

   costs, net                      458    1,943     3,060        8,655     11,864    6,400   3,726

  General and administrative

   expense                         966    1,285     2,315        4,570      4,389    3,405   1,940

  Loss from operations(2)(3)      (1,623) (3,883)   (5,420)     (20,841)  (22,410) (12,426) (7,447)
  Interest (expense and
   financing costs) income, net     (10)    (245)     (530)        253        670      441      75

  Gain on sale of state net
   operating loss carryovers                          2,349

  Net loss(2)(3)                  (1,633)  (4,128)   (3,602)   (21,325)   (21,740) (11,986) (7,372)
  Basic and diluted loss per
   share of common stock(2)(3)(4)    (.22)    (.84)     (.71)    (6.67)     (8.15)   (5.98)  (5.55)

  Dividends                       NONE     NONE       NONE        NONE       NONE     NONE    NONE
</TABLE>

<TABLE>



                                                                       December 31,
                                        June 30,         ________________________________________
                                        2000             1999    1998     1997     1996     1995
                                        (unaudited)      ____    ____     ____     ____     ____
                                         ---------
<S>                                      <C>               <C>    <C>     <C>      <C>      <C>
Selected Balance Sheet Data:

  Total assets                         $7,181           $6,256  $6,599  $24,153  $27,743  $13,953

  Working capital (deficiency)            879           (2,097) (1,889)  14,529   19,929    7,062

  Stockholders' equity                  3,777              557   2,103   20,214   25,374   12,827


(1)      The June 30, 1999 information has been restated to correct certain accounts (see Note 6 to the consolidated financial
      statements as of and for the six-month period ended June 30, 2000).

(2)   The loss from  operations and the net loss and loss per share data include
      a  (reversal)/provision  for excess inventory of $(1,177,531),  $3,089,841
      and $7,254,710 in 1999, 1998 and 1997, respectively.

(3)      The loss from operations and the net loss and loss per share data for 1997 include a $3,313,705
        charge for reacquisition of marketing rights.

(4)   Prior periods have been restated to reflect the effect of the one-for-four
      reverse  stock  split   effective  as  of  March  21,  1997  and  for  the
      one-for-five reverse stock split effective as of January 6, 1999.

</TABLE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF

                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

         Since 1981, the Company has been primarily  engaged in the research and
development of pharmaceutical products containing Natural Alpha Interferon.  The
Company has experienced  significant  operating losses since its inception.  The
Company  received  FDA  approval in 1989 to market  ALFERON N  Injection  in the
United States for the treatment of certain genital warts. ALFERON N Injection is
currently  marketed  and sold in the United  States by the Company and in Mexico
and Germany by licensees. However, the Company has had limited revenues from the
sale of ALFERON N Injection to date. For the Company to operate profitably,  the
Company must sell significantly  more ALFERON N Injection.  Increased sales will
depend  primarily  upon the  expansion  of existing  markets  and/or  successful
attainment  of FDA  approval  to  market  ALFERON  N  Injection  for  additional
indications.  The future  revenues and  profitability  of, and  availability  of
capital for,  biotechnology  companies may be affected by the continuing efforts
of governmental and third-party  payors to contain or reduce the costs of health
care  through  various  means.   Management  is  continuing  to  pursue  raising
additional  capital  by  either  (i)  issuing  securities  in a  private  equity
offering,  or (ii)  licensing  the  rights to its  injectable,  topical  or oral
formulations  of alpha  interferon.  The  Company  has  primarily  financed  its
operations  to date  through  private  placements  and public  offerings  of the
Company's  securities.  This may be more difficult in the future in light of the
FDA's  requirement  for the  Company  to conduct  additional  Phase 3 studies of
ALFERON  N  Injection  in the  treatment  of  patients  infected  with the human
immunodeficiency virus ("HIV") and hepatitis C virus ("HCV").

Liquidity and Capital Resources

         The Company  recently  completed a private  offering in which it raised
gross proceeds of $7,679,380 from the sale of 11,635,451  shares of common stock
at a price of $0.66 per share and  warrants,  exercisable  until  April  2005 to
purchase  11,635,451  shares of common stock at a price of $1.50 per share.  The
proceeds from this private  placement will be used to fund new  initiatives,  in
addition   to  funding   certain   projects   within  the   Company's   existing
interferon-related   operations.   The   Company   is   seeking  to  enter  into
collaborations with companies in the areas of cancer,  infectious diseases,  and
immunology.  The  strategy is to utilize our  expertise in  regulatory  affairs,
clinical trials,  manufacturing,  and research and development to acquire equity
participations in early stage companies. As of October 31, 2000, the Company had
an aggregate of  approximately  $4,400,000 in cash and cash  equivalents.  Until
utilized,  such cash and cash  equivalents  are being  invested  principally  in
short-term interest-bearing investments.

         The Company's future capital  requirements will depend on many factors,
including:  continued scientific progress in its drug development programs;  the
magnitude of these  programs;  progress with  pre-clinical  testing and clinical
trials; the time and costs involved in obtaining regulatory approvals; the costs
involved  in  filing,  prosecuting,   and  enforcing  patent  claims;  competing
technologies  and  market   developments;   changes  in  its  existing  research
relationships;  and  the  ability  of the  Company  to  establish  collaborative
arrangements and effective commercialization activities and arrangements.

         Based on the Company's estimates of revenues,  expenses,  the timing of
repayment of creditors,  and levels of production,  management believes that the
cash  presently  available  will be sufficient to enable the Company to continue
operations  until  at  least  September  30,  2001.  However,   actual  results,
especially with respect to revenues,  may differ  materially from such estimate,
and no  assurance  can be given that  additional  funding  will not be  required
sooner than anticipated or that such additional funding,  whether from financial
markets or collaborative or other  arrangements with corporate  partners or from
other  sources,  will be  available  when needed or on terms  acceptable  to the
Company.  Insufficient  funds will require the Company to further  delay,  scale
back, or eliminate certain or all of its research and development programs or to
license third parties to commercialize products or technologies that the Company
would otherwise seek to develop itself. The independent  auditors' report, dated
April 10, 2000, on the Company's consolidated financial statements as of and for
the year ended December 31, 1999 included an  explanatory  paragraph that states
that the Company  has  suffered  recurring  losses  from  operations  and has an
accumulated  deficit that raise  substantial doubt about its ability to continue
as a going concern.

         The  Company  participates  in the  State of New  Jersey's  corporation
business tax benefit certificate transfer program (the "Program"),  which allows
certain high  technology  and  biotechnology  companies  to transfer  unused New
Jersey net operating loss  carryovers to other New Jersey  corporation  business
taxpayers.  During 1999, the Company  submitted an application to the New Jersey
Economic Development Authority (the "EDA") to participate in the Program and the
application  was  approved.  The EDA then issued a  certificate  certifying  the
Company's eligibility to participate in the Program and the amount of New Jersey
net operating loss  carryovers the Company has available to transfer.  Since New
Jersey law  provides  that net  operating  losses can be carried  over for up to
seven years,  the Company may be able to transfer  its New Jersey net  operating
losses from the last seven years.  The Company  estimated that, as of January 1,
1999, it had  approximately  $85 million of unused New Jersey net operating loss
carryovers available for transfer under the Program. The Program requires that a
purchaser pay at least 75% of the amount of the surrendered tax benefit.

         During December 1999, the Company  completed the sale of  approximately
$32 million of its New Jersey tax loss carryovers and received $2.35 million. In
June 2000,  the Company  submitted an  application  to sell an  additional  $4.8
million of tax benefits  (calculated  by  multiplying  the Company's  unused New
Jersey net operating loss  carryovers of  approximately  $53 million by 9%). The
actual  amount of such tax  benefits  the  Company may sell will depend upon the
allocation among qualifying companies of an annual pool established by the State
of New Jersey.  The allocated  pool for fiscal year 2000 and future years is $40
million per year.

         The Company obtained human white blood cells used in the manufacture of
ALFERON N Injection from several sources,  including the Red Cross pursuant to a
supply agreement dated April 1, 1997 (the "Supply Agreement").  The Company will
not need to purchase  more human white blood cells until such time as production
of crude alpha  interferon is resumed,  and has not purchased any since April 1,
1998.  Under the terms of the Supply  Agreement,  the Company was  obligated  to
purchase a minimum  amount of human white blood cells each month  through  March
1999 (the "Minimum  Purchase  Commitment"),  with an aggregate  Minimum Purchase
Commitment  during the period  from April 1998  through  March 1999 in excess of
$3,000,000.   As  of  November  23,  1998,   the  Company  owed  the  Red  Cross
approximately  $1.46 million plus interest at the rate of 6% annum accruing from
April 1, 1998 (the "Red  Cross  Liability")  for  white  blood  cells  purchased
pursuant to the Supply Agreement.

         In an agreement  dated  November 23, 1998,  the Company agreed to grant
the Red Cross a  security  interest  in  certain  assets to secure the Red Cross
Liability and to issue to the Red Cross  300,000  shares of Common Stock (with a
market value of  $1,171,875 at December 4, 1998) and  additional  shares at some
future date as  requested  by the Red Cross.  The Red Cross  agreed that any net
proceeds  received by it upon sale of such shares  would be applied  against the
Red Cross Liability and that at such time as the Red Cross Liability was paid in
full, the Minimum Purchase  Commitment would be deleted  effective April 1, 1998
and any then  existing  breaches of the  Minimum  Purchase  Commitment  would be
waived.  In January 1999 the Company  granted the Red Cross a security  interest
(the  "Security  Interest")  in, among other things,  the Company's real estate,
equipment inventory,  receivables,  and New Jersey net operating loss carryovers
to secure  repayment  of the Red Cross  Liability,  and the Red Cross  agreed to
forbear from  exercising its rights under the Supply  Agreement,  including with
respect to collecting  the Red Cross  Liability,  until June 30, 1999 (which was
subsequently  extended  until  December 31,  1999).  On December  29, 1999,  the
Company,  the Red Cross and GP  Strategies  entered in an agreement  pursuant to
which the Red Cross agreed that until  September  30, 2000 it would forbear from
exercising its rights under (i) the Supply Agreement,  including with respect to
collecting the Red Cross Liability,  and (ii) the Security  Interest.  As of the
date  hereof,  the Red Cross has not given the  Company  notice of its intent to
exercise its rights to collect the Red Cross Liability.  Under the terms of such
agreement,  the Company is  allowing  the Red Cross to sell the  Company's  real
estate.  In the event the Red Cross is successful in selling the Company's  real
estate,  the  Company  would  hope to be able to enter into a lease with the new
owner, although there can be no assurance.

         As the liability to the Red Cross remains  unsettled until such time as
the Red Cross sells the shares it has already  received and could receive in the
future,  the Company  recorded any shares issued to the Red Cross as "Settlement
Shares" within  stockholders'  equity.  Any decreases in the market value of the
Company's common stock below $1.2 million, until such time as the Red Cross were
to sell its shares,  would  impact the value of the shares held by the Red Cross
and accordingly require an adjustment to "Settlement Shares". Due to the decline
in the  Company's  stock price  during  1999,  an  adjustment  for  $550,000 was
recorded with a corresponding  charge to cost of goods sold. Due to the increase
in the Company's  stock price during the three months ended March 31, 2000 up to
the  date of sale  by the Red  Cross  of all  remaining  Settlement  Shares,  an
adjustment  for  $287,341 was recorded  with a  corresponding  credit to cost of
goods sold.  During 1999, the Red Cross sold 27,000 of the Settlement Shares and
sold the balance of such shares  (273,000  shares)  during the first  quarter of
2000.  As a result,  the net proceeds from the sales of the  Settlement  Shares,
$33,000 in 1999 and $368,000 in 2000,  were applied against the liability to the
Red Cross.  The  remaining  liability to the Red Cross at September 30, 2000 and
December 31, 1999 was approximately $1,260,000 and $1,579,000,  respectively. On
October 30, 2000,  the Company  issued an additional  800,000  shares to the Red
Cross which  are part of this  offering.  The net proceeds from the sale of such
shares by the Red Cross will be applied against the remaining  liability owed to
the Red Cross. However, there can be no assurance that the net proceeds from the
sale of such shares will be  sufficient to  extinguish  the remaining  liability
owed the Red Cross.

         In an agreement dated March 25, 1999, GP Strategies  agreed to lend the
Company $500,000 (the "GP Strategies  Debt").  In return,  the Company agreed to
grant GP Strategies (i) a first  mortgage on the Company's  real estate,  (ii) a
two-year option to purchase the Company's real estate, provided that the Company
has terminated its operations and the Red Cross  Liability has been repaid,  and
(iii) a two-year right of first refusal in the event the Company desires to sell
its real estate. In addition,  the Company agreed to issue GP Strategies 500,000
shares of Common  Stock  (the "GP  Shares")  and a  five-year  warrant  (the "GP
Warrant") to purchase 500,000 shares of Common Stock at a price of $1 per share.
The Company  also agreed not to increase  its payroll  during the term of the GP
Strategies  debt  without the prior  consent of GP  Strategies.  Pursuant to the
agreement,  the Company has issued a note to GP Strategies  representing  the GP
Strategies  Debt,  which note was due on September 30, 1999 and bears  interest,
payable at maturity,  at the rate of 6% per annum. In addition, at that time the
Company  negotiated a  subordination  agreement  with the Red Cross  pursuant to
which  the Red  Cross  agreed  that its lien on the  Company's  real  estate  is
subordinate  to GP  Strategies'  lien.  On March 27,  2000,  the  Company and GP
Strategies  entered  into an agreement  pursuant to which (i) the GP  Strategies
Debt was extended until June 30, 2001, and (ii) the Management Agreement between
the Company and GP  Strategies  was  terminated  and all  intercompany  accounts
between the Company and GP Strategies (other than the GP Strategies Debt) in the
amount of approximately  $130,000 were  discharged.  The agreement also provides
that (i)  commencing  on May 1, 2001 and ending on June 30, 2001, on any day ISI
may require GP  Strategies  to exercise  the GP Warrant and sell the  underlying
shares,  if the market price of ISI Common Stock exceeds $1.00 per share on each
of the 10 trading  days prior to any such day,  and (ii) any  proceeds  from the
sale of the shares  issuable  upon  exercise  of the GP Warrant in excess of the
aggregate amount paid by GP Strategies to purchase such shares,  would be deemed
to reduce  the then  outstanding  amount of  principal  and  interest  of the GP
Strategies Debt until such amount is reduced to zero.

         The Company's Common Stock now trades on the OTC Bulletin Board,  which
may have a material  adverse effect on the ability of the Company to finance its
operations and on the liquidity of the Common Stock.

Results of Operations

Six Months Ended June 30, 2000 versus Six Months Ended June 30, 1999

         For the six  months  ended  June 30,  2000 and 1999,  the  Company  had
revenues  from the  sale of  ALFERON  N  Injection  of  $321,072  and  $985,910,
respectively.  In the third and fourth  quarters of 1999,  the  Company  offered
price  concessions to its largest customers in an attempt to raise cash from the
sale of ALFERON N Injection,  which resulted in substantially higher than normal
sales  in the  second  half of 1999 and in lower  than  normal  sales in the six
months ended June 30, 2000.  This was due to the fact that such  customers  were
selling out of their  inventory of Alferon N Injection  (rather than  purchasing
Alferon N Injection from the Company).

         In the six months ended June 30, 2000,  the Company  sold,  through its
distributor, to wholesalers and other customers in the United States 2,636 vials
of ALFERON N Injection,  compared to 7,897 vials sold by the Company  during the
six  months  ended  June 30,  1999.  In  addition,  foreign  sales of  ALFERON N
Injection  were 354 vials for the six months ended June 30, 1999.  There were no
foreign sales in the six months ended June 30, 2000.

         Cost of goods  sold and idle  production  costs  totaled  $655,330  and
$2,223,840  for six months  ended  June 30,  2000 and 1999,  respectively.  Idle
production  costs in the six  months  ended June 30,  2000 and 1999  represented
fixed  production  costs,  which were  incurred  after  production  of ALFERON N
Injection was  discontinued  in April 1998.  Such costs were greater in the 1999
period due to higher levels of payroll costs.  In addition,  lower unit sales in
the six months  ended June 30, 2000 as compared to the six months ended June 30,
1999  contributed to lower cost of goods sold. In addition,  based on changes in
the value of the Settlement Shares, for the six months ended June 30, 2000, cost
of goods sold was  credited  for $287,341 as compared to a charge of $587,261 to
cost of goods sold for the six months ended June 30, 1999.

         During the six months  ended June 30,  2000 and 1999,  a portion of the
reserve  for  excess  inventory  was  reversed  in the  amount of  $135,271  and
$582,650,  respectively,  in order to reflect the inventory at its estimated net
realizable value.

         Research and development  expenses during the six months ended June 30,
2000 of $457,819  decreased by $1,485,170 from $1,942,989 for the same period in
1999,  principally because the Company has had a reduction in research personnel
which has reduced its payroll and research costs. In addition, during the second
quarter of 2000, the Company  settled  amounts owed on various  research-related
liabilities at a savings to the Company of approximately  $457,000.  Such amount
was credited against research and development expenses.

         General and  administrative  expenses for the six months ended June 30,
2000 were  $966,177 as compared to $1,285,023  for the same period in 1999.  The
decrease of  $318,846  was  principally  due to  decreases  in payroll and other
operating expenses.

         Interest  expense,  net,  for the six months  ended  June 30,  2000 was
$10,399 of expense and primarily  represented  interest accrued on the Red Cross
Liability and GP Strategies Debt partially offset by interest  income.  Interest
expense, net, for the six months ended June 30, 1999 was $244,623 of expense and
primarily represented financing costs partially offset by interest income.

         As a result  of the  foregoing,  the  Company  incurred  net  losses of
$1,633,382  and  $4,127,638  for the six months  ended  June 30,  2000 and 1999,
respectively.

Year Ended December 31, 1999 versus Year Ended December 31, 1998

         For the year ended December 31, 1999 (the "1999 Period"), the Company's
revenues of $2,329,222  included $2,328,945 from the sale of ALFERON N Injection
and the balance from sales of research products.  Revenues of $2,007,007 for the
year ended December 31, 1998 (the "1998 Period")  included  $1,930,657  from the
sale of ALFERON N Injection and the balance from sales of research  products and
other revenues.  Cost of goods sold and idle production costs totaled $3,552,026
and  $6,533,462  for  the  1999  Period  and  1998  Period,  respectively.  Idle
production  costs in the 1999 and 1998  Periods,  represented  fixed  production
costs,  which  were  incurred  after  production  of  ALFERON  N  Injection  was
discontinued in April 1998.

         In May 1997, the Company appointed  Alternate Site  Distributors,  Inc.
("ASD"),  a wholly owned  subsidiary of Bergen  Brunswig  Corporation,  the sole
United States distributor of ALFERON N Injection.  Under the agreement with ASD,
the Company sold vials to ASD, which then resold them to the  marketplace.  As a
result, the Company  recognized  revenues when it sold vials to ASD, rather than
when ASD resold them to the marketplace.  In June 1998, the Company replaced ASD
with ICS,  another  subsidiary  of Bergen  Brunswig  Corporation  better able to
handle  the  Company's  specialty  distribution  requirements.   Under  the  new
agreement,  vials  are not sold to ICS,  but  instead  are  sold by the  Company
directly to the marketplace,  at which time the Company recognizes revenues.  In
the 1999 Period,  the Company  sold to  wholesalers  and other  customers in the
United States 19,463 vials of ALFERON N Injection, compared to 13,284 vials sold
by the Company during the 1998 Period.  In addition,  foreign sales of ALFERON N
Injection  were  1,374  vials  and 3,300  vials  for the 1999 and 1998  periods,
respectively.

         During the 1999 Period,  a portion of the reserve for excess  inventory
was reversed in the amount of  $1,177,531  as compared to a provision for excess
inventory of $3,089,841 during the 1998 Period in order to reflect the inventory
at its estimated net realizable value.

         Research and development  expenses during the 1999 Period of $3,060,019
decreased by $5,594,869 from $8,654,888 for the 1998 Period, principally because
the Company has concluded its Phase 3 clinical studies of ALFERON N Injection in
HIV- and HCV-infected  patients. The Company received $29,375 in 1998, as rental
income from GP Strategies for the use of a portion of the Company's  facilities,
which offset research and development expenses.

         General and administrative expenses for the 1999 Period were $2,315,010
as compared to $4,569,608  for the 1998 Period.  The decrease in the 1999 Period
was principally due to decreases in payroll and other operating expenses.

         On February 5, 1998, the Company  completed the sale of 7,500 shares of
Series  A  Convertible  Preferred  Stock  to an  institutional  investor  for an
aggregate amount of $7,500,000.  The $7,179,000 of net proceeds were expected to
augment the  Company's  working  capital  while  awaiting the results of the two
Phase 3 clinical trials of ALFERON N Injection for the treatment of HIV-infected
and  hepatitis C  patients.  After  considering  the  reaction of the  Company's
stockholders to the issuance and the negative impact the issuance apparently had
on the Company's  market  capitalization,  the Board of Directors  determined on
February 13, 1998 to exercise an option to repurchase  the shares of Convertible
Preferred  Stock for $7,894,737  (plus accrued  dividends).  The net loss to the
Company on the repurchase of the Preferred Stock amounted to $737,037.

         Interest  income for the 1999 Period was $6,104 as compared to $252,528
for the 1998 Period.  The  decrease of $246,424 was due to less funds  available
for investment in the 1999 Period.

         Interest  expense and financing costs for the 1999 Period was $536,394,
primarily due to interest and other costs  related to the GP Strategies  Debt in
1999, as compared to zero for the 1998 Period.

         During  December 1999,  the Company  completed the sale of a portion of
its New Jersey tax loss carryforwards and recorded a gain on such sale amounting
to $2,348,509, which is recorded as an income tax benefit.

         As a result  of the  foregoing,  the  Company  incurred  net  losses of
$3,602,083 and $21,325,301 for the 1999 Period and 1998 Period, respectively.

Year Ended December 31, 1998 Versus Year Ended December 31, 1997

         For the year  ended  December  31,  1998,  the  Company's  revenues  of
$2,007,007  included  $1,930,657  from the sale of ALFERON N  Injection  and the
balance  from  sales of  research  products  and  other  revenues.  Revenues  of
$2,955,802  for the year ended  December 31, 1997 (the "1997  Period")  included
$2,927,585  from the sale of ALFERON N Injection  and the balance  from sales of
research  products.  Cost of  goods  sold  and  idle  production  costs  totaled
$6,533,462  and  $1,857,959  for the 1998 Period and 1997 Period,  respectively.
Idle production costs in the 1998 Period primarily  represented fixed production
costs,  which  were  incurred  after  production  of  ALFERON  N  Injection  was
discontinued  in April  1998.  There were no idle  production  costs in the 1997
Period.

         In May 1997, the Company  appointed  ASD, a wholly owned  subsidiary of
Bergen  Brunswig  Corporation,  the sole United States  distributor of ALFERON N
Injection.  Under the agreement  with ASD, the Company sold vials to ASD,  which
then  resold  them to the  marketplace.  As a  result,  the  Company  recognized
revenues  when it sold vials to ASD,  rather  than when ASD  resold  them to the
marketplace. In June 1998, the Company replaced ASD with ICS, another subsidiary
of Bergen  Brunswig  Corporation  better able to handle the Company's  specialty
distribution  requirements.  Under the new agreement, vials are not sold to ICS,
but are instead  sold by the  Company  directly  to the  marketplace,  under the
administration of ICS, at which time revenues are recognized by the Company.  In
the 1998 Period,  the Company  sold to  wholesalers  and other  customers in the
United States 13,284 vials of ALFERON N Injection, compared to 21,584 vials sold
by the Company during the 1997 Period.  In addition,  foreign sales of ALFERON N
Injection  were  3,300  vials  and 4,587  vials  for the 1998 and 1997  Periods,
respectively.

         In light of the  results  to date of the  Company's  Phase 3 studies of
ALFERON  N  Injection  in  HIV-  and  HCV-infected  patients,  the  Company  has
written-down  the carrying  value of its inventory of ALFERON N Injection to its
estimated net realizable value. The write-downs were the result of the Company's
reassessment  of anticipated  near-term needs for product to be sold or utilized
in clinical trials (within  approximately a two-year period beginning January 1,
1998 and based on historical sales levels). As a result, during the three months
ended March 31, 1998, the Company recorded an inventory  write-off of $3,089,841
in  addition  to the  $7,254,710  inventory  write-down,  which was  recorded at
December 31,  1997.  As of December 31,  1998,  the Company  estimated  that the
remaining  inventory  value  represented  product  to be sold  within a one-year
period.

         Research and development  expenses during the 1998 Period of $8,654,888
decreased  by  $3,209,099  from  $11,863,987  for the 1997  Period,  principally
because the Company has nearly concluded its Phase 3 clinical studies of ALFERON
N Injection in HIV- and HCV-infected  patients. The Company received $29,375 and
$234,996,  respectively,  as rental income from GP  Strategies  for the use of a
portion of the  Company's  facilities,  which offset  research  and  development
expenses.

         General and administrative expenses for the 1998 Period were $4,569,608
as compared to  $4,389,025  for the 1997  Period.  The  increase of $180,583 was
principally  due to  increases  in  payroll  and other  operating  expenses.  GP
Strategies provides certain  administrative  services for which the Company paid
GP Strategies  $120,000 for both the 1998 and 1997 Period. In addition,  for the
1997 Period,  payments to GP Strategies for services  provided to the Company by
GP Strategies personnel amounted to $135,000. For the 1998 Period, receipts from
GP  Strategies  for  services  provided to GP  Strategies  by Company  personnel
amounted to $25,000.

         On February 5, 1998, the Company  completed the sale of 7,500 shares of
Series  A  Convertible  Preferred  Stock  to an  institutional  investor  for an
aggregate amount of $7,500,000.  The $7,179,000 of net proceeds were expected to
augment the  Company's  working  capital  while  awaiting the results of the two
Phase 3 clinical trials of ALFERON N Injection for the treatment of HIV-infected
and  hepatitis C  patients.  After  considering  the  reaction of the  Company's
stockholders to the issuance and the negative impact the issuance apparently had
on the Company's  market  capitalization,  the Board of Directors  determined on
February 13, 1998 to exercise an option to repurchase  the shares of Convertible
Preferred  Stock for $7,894,737  (plus accrued  dividends).  The net loss to the
Company on the repurchase of the Preferred Stock amounted to $737,037.

         Interest  income  for the 1998  Period  was  $252,528  as  compared  to
$670,199  for the 1997  Period.  The  decrease of $417,671 was due to less funds
available for investment in the current period.

         As a result  of the  foregoing,  the  Company  incurred  net  losses of
$21,325,301 and $21,739,680 for the 1998 Period and 1997 Period, respectively.

Recent Accounting Developments

         In June 1998, the Financial  Accounting Standards Board ("FASB") issued
Statement of Financial  Accounting Standard No. 133 (SFAS 133),  "Accounting for
Derivative  Instruments  and Hedging  Activities".  This  Statement  establishes
accounting and reporting standards for derivative instruments, including certain
derivative  instruments  embedded in other contracts and for hedging activities.
It  requires  that an entity  recognize  all  derivatives  as  either  assets or
liabilities in the statement of financial position and measure those instruments
at fair value.  This  Statement as amended by SFAS 137 and SFAS 138 is effective
for all fiscal  quarters of fiscal  years  beginning  after June 15,  2000.  The
Company does not believe that implementation of SFAS 133, as amended,  will have
a material effect on its results of operations or financial position.

         On December 3, 1999,  the  Securities  and Exchange  Commission  issued
Staff  Accounting   Bulletin  No.  101  -  "Revenue   Recognition  in  Financial
Statements"  ("SAB No. 101").  SAB No. 101 provides the SEC staff's views on the
recognition of revenue including  nonrefundable  technology access fees received
by biotechnology companies in connection with research collaborations with third
parties. SAB No. 101 states that in certain circumstances the SEC staff believes
that up-front  fees,  even if  nonrefundable,  should be deferred and recognized
systematically over the term of the research arrangement.  On June 26, 2000, the
SEC issued SAB No. 101B which postponed the  implementation of SAB No. 101 until
the quarter  beginning  October 1, 2000. The Company is currently  assessing the
financial  impact  of  complying  with  SAB No.  101 and has not yet  determined
whether  applying  the  accounting  guidance of SAB No. 101 will have a material
effect on its financial position or results of operations.

         FASB  Interpretation  No. 44 provides guidance for applying APB Opinion
No. 25,  "Accounting  for Stock  Issued to  Employees"  ("FIN  44").  It applies
prospectively  to new  awards,  exchanges  of awards in a business  combination,
modifications to outstanding  awards,  and changes in grantee status on or after
July 1, 2000, except for provisions  related to repricings and the definition of
an employee  which apply to awards issued after  December 15, 1998.  The Company
has  evaluated  the  financial  impact  of FIN 44 and has  determined  that  the
repricing  of  employee  stock  options on  October  27,  1999 falls  within the
guidance of FIN 44. On October 27,  1999,  the Company  repriced  429,475  stock
options to $.25 per share. On July 1, 2000, the  implementation  date of FIN 44,
352,823  shares of the 429,475  shares were fully vested  (exercisable)  and the
closing  price of the  Company's  common stock on such date was $1.63 per share.
Beginning  on and  after  July 1,  2000,  the  Company  is  required  to  record
compensation  expense on the repriced  vested stock options only when the market
price  exceeds  $1.63 per  share  and only on the  amount in excess of $1.63 per
share. For the repriced unvested stock options,  the intrinsic value measured at
the July 1, 2000 effective date that is  attributable  to the remaining  vesting
period will be recognized over that future period. The unvested stock options at
July 1, 2000 (76,652) will fully vest on January 1, 2001. On September 30, 2000,
the  closing  price of the  Company's  common  stock  was  $1.16  per  share and
accordingly,  under FIN 44, no  additional  compensation  expense  was  recorded
through that date on the repriced fully vested stock options. However, under FIN
44,  for  the  repriced   unvested  stock  options,   the  Company  will  record
compensation expenses of $7,431. The Company believes that this will be the only
impact of FIN 44 on the Company's financial position and operating results.

Forward-Looking Statements

         This prospectus contains certain forward-looking  statements reflecting
management's   current  views  with  respect  to  future  events  and  financial
performance.  These forward-looking  statements are subject to certain risks and
uncertainties that could cause actual results to differ materially from those in
the forward-looking statements, including, but not limited to, the risk that the
Company will run out of cash;  uncertainty of obtaining  additional  funding for
the Company; uncertainty of obtaining United States regulatory approvals for the
Company's  products under development and foreign  regulatory  approvals for the
Company's  FDA-approved  product and  products  under  development  and, if such
approvals are obtained,  uncertainty of the successful commercial development of
such products; substantial competition from companies with substantially greater
resources than the Company in the Company's present and potential businesses; no
guaranteed source of required materials for the Company's  products;  dependence
on certain distributors to market the Company's products; potential adverse side
effects from the use of the Company's  products;  potential patent  infringement
claims  against the  Company;  possible  inability of the Company to protect its
technology;  substantial  royalty  obligations  payable by the Company;  risk of
product liability;  and risk of loss of key management  personnel,  all of which
are  difficult  to  predict  and many of which are  beyond  the  control  of the
Company.


<PAGE>


                                    BUSINESS

General

         The  Company  is a  biopharmaceutical  company  engaged  in the  study,
manufacture,  and sale of pharmaceutical  products based on its highly purified,
multispecies,  natural source alpha interferon ("Natural Alpha Interferon"). The
Company's ALFERON N Injection  (Interferon Alfa-n3) product has been approved by
the United  States Food and Drug  Administration  ("FDA") for the  treatment  of
certain  types of genital warts and the Company has studied its potential use in
the treatment of HIV, hepatitis C, and other  indications.  The Company has also
studied  ALFERON N Gel(R) and ALFERON  LDO(R),  the  Company's  topical and oral
formulations of Natural Alpha Interferon,  for the potential  treatment of viral
and immune system diseases.

         The Company operates in a single segment.  For the years ended December
31, 1999,  1998 and 1997,  domestic  sales totaled  $2,204,437,  $1,716,157  and
$2,613,430,   respectively,   and  foreign  sales  (primarily  Germany)  totaled
$124,508,  $214,500 and  $314,155,  respectively.  All  identifiable  assets are
located in the United States.

Scientific Background

         Interferons  are a group of proteins  produced and secreted by cells to
combat  diseases.  Researchers  have  identified  five  major  classes  of human
interferon:  alpha,  beta,  gamma,  omega,  and tau. The Company's three ALFERON
products contain a form of alpha interferon. The worldwide market for injectable
alpha  interferon-based  products has experienced rapid growth and various alpha
interferon injectable products are approved for 17 major medical uses worldwide.

         Alpha  interferons  are  manufactured  commercially  in three ways:  by
genetic  engineering,  by cell culture, and from human white blood cells. In the
United  States,  all three of these types of alpha  interferon  are approved for
commercial sale.

         The Company  believes  that the  potential  advantages of Natural Alpha
Interferon  over  recombinant  interferons  may be based upon  their  respective
molecular  compositions.  Natural  Alpha  Interferon  is composed of a family of
proteins  containing many different  molecular species of alpha  interferon.  In
contrast,  recombinant  alpha  interferons  each contain only a single  species.
Researchers  have  reported  that the  various  species of  interferon  may have
differing  antiviral  activity  depending upon the type of virus.  Natural Alpha
Interferon  presents a broad complement of species that the Company believes may
account for its higher efficacy in laboratory studies with the HIV compared with
that of  recombinant  alpha  interferon 2a and 2b (ROFERON(R) A and INTRON(R) A,
respectively).  Natural Alpha Interferon is also glycosylated (partially covered
with sugar  molecules).  Such  glycosylation  is not  present  on the  currently
marketed recombinant alpha interferons. The Company believes that the absence of
glycosylation   may  be,   in   part,   responsible   for  the   production   of
interferon-neutralizing  antibodies  seen in patients  treated with  recombinant
alpha interferon.  Although cell cultured-derived interferon is also composed of
multiple  glycosylated alpha interferon species, the types and relative quantity
of these species are different from the Company's Natural Alpha Interferon.

         The  production of Natural Alpha  Interferon is dependent upon a supply
of human white blood cells and other  essential  materials.  The Company obtains
white blood cells from FDA- licensed blood donor centers.

ALFERON N Injection

         Approved  Indication.  On October 10, 1989, the FDA approved  ALFERON N
Injection  for the  intralesional  treatment of  refractory  (resistant to other
treatment)  or recurring  external  genital warts in patients 18 years of age or
older. Substantially all of the Company's revenues, to date, have been generated
from the sale of  ALFERON N  Injection  for such  treatment.  Genital  warts,  a
sexually-  transmitted  disease,  are caused by certain types of human papilloma
viruses ("HPV"). A published report estimates that  approximately  eight million
new and  recurrent  cases of genital  warts occur  annually in the United States
alone.

         Genital warts are usually  treated  using caustic  chemicals or through
physical  removal  methods.  These procedures can be quite painful and effective
treatment  is  often  difficult  to  achieve.   A  topical   formulation  of  an
interferon-inducer  was approved by the FDA in 1997 for the treatment of genital
warts.  To date,  the Company  does not  believe  that such  approval  has had a
material adverse effect on the sales of Alferon N Injection.

         Clinical Trials for New Indications. In an effort to obtain approval to
market ALFERON N Injection for  additional  indications in the United States and
around the world, the Company has conducted, and is currently planning,  various
clinical trials for new indications.

         HIV-infected   patients.   The  Human  Immunodeficiency  Virus  ("HIV")
infection  is at epidemic  levels in the world.  The World  Health  Organization
estimates  that 50 million  people - 1% of the world's  population - have become
infected  with HIV. HIV  infection  usually  signals the start of a  progressive
disease that  compromises the immune systems,  ultimately  resulting in Acquired
Immune  Deficiency  Syndrome  ("AIDS").  The United  States  Centers for Disease
Control estimates that as of the end of 1999, there were  approximately  412,000
people living with HIV infection and with AIDS in the United States.

         An article published in AIDS Research and Human Retroviruses in 1993 by
investigators  at Walter  Reed Army  Institute  of Research  ("Walter  Reed") in
collaboration  with  the  Company's   scientists   indicated  that  the  various
interferon  species  display vast  differences  in their ability to affect virus
replication.  Walter Reed  researchers  found that the  Company's  Natural Alpha
Interferon  was 10 to 100 times  more  effective  than equal  concentrations  of
recombinant  alpha  interferon  2a  and  2b,   respectively,   in  blocking  the
replication of HIV-1,  the AIDS virus,  in infected  human cells  (monocytes) in
vitro.

         Moreover, the Company's scientists were able to separate members of the
interferon  family in single  protein  fractions  or clusters of proteins  using
advanced  fractionation  techniques.  The  individual  fractions were tested for
their  ability to block HIV  replication  in the  laboratory by  researchers  at
Walter Reed. They found that the unusual  anti-HIV  activity was attributable to
very specific fractions in the Company's product.  The most active fractions are
not present in marketed recombinant interferon products.

         This information  provided additional support for a long-held belief of
the Company that its Natural Alpha Interferon has unique  anti-viral  properties
distinguishing it from recombinant  interferon products. In addition,  published
reports  of  trials  using   recombinant   alpha   interferon  in   asymptomatic
HIV-infected  patients  indicated that while high doses blocked virus production
in many cases, such doses resulted in high levels of adverse reactions,  thereby
limiting the usefulness of the recombinant  product.  These facts led the Walter
Reed researchers to conduct a Phase 1 clinical trial with the Company's  product
in asymptomatic HIV-infected patients.

         In March  1992,  Walter  Reed  launched a Phase 1  clinical  trial with
asymptomatic  HIV-infected patients to investigate the safety and tolerance,  at
several dose regimens, of ALFERON N Injection,  self-injected subcutaneously for
periods of up to 24 weeks.  The  investigators  concluded that the treatment was
"surprisingly"  well tolerated by patients,  at all dose  regimens.  Preliminary
findings  were reported by Walter Reed at the IXth  International  Conference on
AIDS in  Berlin in 1993.  The  investigators  also  reported  that the  expected
interferon side effects,  such as flu-like symptoms,  were rare or absent in the
majority of patients treated with the Company's product.

         Although this Phase 1 clinical trial was designed  primarily to provide
safety  information  on various  doses of ALFERON N Injection  used for extended
periods  of time,  there  were  encouraging  indications  that  certain  disease
parameters had stabilized or even improved in certain patients by the end of the
experimental treatment.

         In a follow-up  analysis of patients'  blood testing data, it was found
after an average  of 16 months  after  treatment,  CD4 white  blood cell  counts
remained essentially  unchanged or were higher than at the onset of the trial in
11 of 20 patients. In addition, while on treatment, the amount of HIV detectable
in the  patients'  blood,  as  measured by  polymerize  chain  reaction  ("PCR")
testing,  declined  in a dose  dependent  manner  (the  greatest  declines  were
observed in the highest dose group).  Also,  none of the patients  were found to
have developed neutralizing  antibodies to Natural Alpha Interferon,  even after
being treated three times weekly for many months. These results were reported at
the Third  International  Congress  on  Biological  Response  Modifiers  held in
Cancun,  Mexico in January 1995 and were selected for a poster  presentation  at
the 35th Interscience  Conference on Antimicrobial  Agents and Chemotherapy held
in San Francisco in September 1995. An extensive report was published in the May
1996 Issue of the Journal of Infectious Diseases.

         It is  important  to note that,  because  of the small  number of study
participants  and the absence of a control  group,  no firm  conclusions  can be
drawn  from these  observations.  However,  based on the safety and  preliminary
efficacy  data  obtained  from this trial and after  meeting  with the FDA,  the
Company  conducted a multi-center  Phase 3 clinical trial of ALFERON N Injection
in HIV-infected patients, which was completed in December 1997. This randomized,
double-blind,  placebo-controlled  trial was designed to evaluate the safety and
efficacy of ALFERON N Injection in the treatment of HIV-positive patients,  some
of whom may have been  taking  other  FDA-approved  antiviral  agents.  Enrolled
patients were required to have CD4 white blood cell counts of at least 250 cells
per  microliter  and a viral burden (as  determined  by PCR testing) of at least
2,000 RNA copies per milliliter.  The Company completed the analysis of the data
collected from the 16 investigator  sites and attended a pre-filing meeting with
the FDA in  mid-March  1998.  Shortly  after that  meeting,  the FDA advised the
Company that, although ALFERON N Injection  demonstrated  biological activity in
this  Phase 3 clinical  trial,  the  results  were  insufficient  for filing for
approval  for this  additional  indication  for ALFERON N  Injection.  While the
results  over  the  course  of  treatment   demonstrated   benefits   that  were
statistically  significant  for  the  group  of  patients  receiving  ALFERON  N
Injection and highly statistically significant for the subgroup of such patients
with high CD4 counts, the study's primary efficacy variable  (reduction in viral
load)  was  not  met  at the  time  point  specified  in the  protocol  (end  of
treatment).  The FDA  therefore  indicated  that an  additional  trial  would be
necessary  to  evaluate  further the  efficacy  of ALFERON N Injection  for this
indication.  The Company does not currently  intend to pursue this program until
it obtains  substantial  additional  funding or enters into  collaboration  with
another company for such purpose.

         There can be no assurance that ALFERON N Injection for the treatment of
patients  with HIV  will be  cost-effective,  safe,  and  effective  or that the
Company will be able to obtain FDA approval for such use.  Furthermore,  even if
such approval is obtained,  there can be no assurance  that such product will be
commercially  successful or will produce significant revenues or profits for the
Company.

         Hepatitis C. Chronic  viral  hepatitis is a liver  infection  caused by
various  hepatitis  viruses.  The United  States  Centers  for  Disease  Control
estimates  that nearly four million  people in the United  States are  presently
infected with the hepatitis C virus  ("HCV"),  a majority of who become  chronic
carriers  and will suffer  gradual  deterioration  of their  liver and  possibly
cancer  of  the  liver.   Several  brands  of   recombinant   interferon  and  a
cell-cultured  interferon have been approved for the treatment of hepatitis C in
the United States and by various regulatory agencies worldwide.  See "Business -
ALFERON N Injection -  Competition."  However,  reports have indicated that many
patients  either do not respond to treatment  with the  recombinant  products or
relapse  after  treatment.   The  Company  has  conducted  three   multi-center,
randomized, open-label, dose ranging Phase 2 clinical trials utilizing ALFERON N
Injection  with  patients  chronically  infected  with HCV. The objective of the
Company's  HCV  clinical  studies  was to compare  the safety  and  efficacy  of
different doses of Natural Alpha  Interferon  injected  subcutaneously  in naive
(previously  untreated),  refractory  (unsuccessfully  treated with  recombinant
interferon),  and relapsing (initially  responded to recombinant  interferon but
later relapsed) patients.

         The results in naive  patients  indicated a significant  dose-dependent
response at the end of treatment  favoring the highest dose group.  In addition,
treatment  of naive  patients  with  ALFERON N  Injection  did not  produce  any
interferon-neutralizing antibodies. An oral presentation of the results in naive
patients was given at the American  Association  for the Study of Liver Diseases
("AASLD")  meeting that took place in November  1995.  The results of this study
were published in the February 1997 issue of Hepatology.

         The   results  in   refractory   patients   indicated   a   significant
dose-dependent response at the end of treatment favoring the highest dose group.
A poster  presentation  of the results in  refractory  patients was given at the
AASLD meeting that took place in November 1995.

         As a result of the  promising  results  obtained  in the study on naive
patients,  the study on relapsing patients,  which was accruing patients slowly,
was terminated early so that the Company could concentrate its limited resources
on pursuing the Phase 3 trials in naive patients, discussed below.

         After  meeting  with the FDA,  the Company  commenced in 1996 a Phase 3
multi-center,  open label,  randomized,  controlled  clinical  trial designed to
evaluate  the  safety  and  efficacy  of ALFERON N  Injection  in naive  chronic
hepatitis C patients.  The trial was conducted at 26 sites located in the United
States and Canada and a total of 321 people were treated. The trial consisted of
a 24-week  treatment  phase and 24-week  follow-up  and also included an interim
analysis after  approximately  one-half of the enrolled  patients  completed the
treatment and follow-up phases.

         On April 2, 1998,  the Company  announced it had  completed the interim
analysis of the results for approximately half of the enrolled patients.  If the
results  of the  interim  analysis  had  demonstrated  at a very  high  level of
statistical  significance  that  ALFERON N Injection is  effective,  the Company
intended to seek FDA  approval  while  continuing  to follow the other  enrolled
patients.  However,  while  the  efficacy  analysis  indicated  that  ALFERON  N
Injection  and the control  treatment  (an approved  therapy)  appeared to yield
similar results,  the study protocol  required a showing of superiority in order
to meet the  criteria  for  statistical  significance  in the interim  analysis.
Therefore the Company did not seek FDA approval  based on the interim  analysis.
The  Phase 3 study  was  completed  in 1998.  The  Company  completed  the final
analysis  of the data in March  1999,  and met  with  the FDA to  determine  the
acceptability  of the  results for filing  purposes.  At that  meeting,  the FDA
advised the Company that the results of the trial were  insufficient to file for
approval because the designed endpoint of the trial (which required a showing of
superiority in sustained  normalization of liver enzymes at the end of treatment
and after six months of follow up) was not met. Therefore,  the FDA informed the
Company  that an  additional  trial would be required  to further  evaluate  the
efficacy of Alferon N Injection for this  indication.  At the present time,  the
Company does not have the resources necessary to conduct an additional study and
does not plan to initiate  such a study unless it can find a sponsor to continue
this program.

         HIV and Hepatitis C Co-Infected  Patients.  In December  1997,  patient
enrollment  commenced  in a Phase 2  multi-center,  open  label  clinical  trial
designed to evaluate  the safety and efficacy of ALFERON N Injection in patients
co-infected  with HIV and HCV. This study has been concluded and an abstract was
accepted for publication in Gastroenterology  for the Annual Meeting of American
Gastroenterology Association,  Digestive Disease Week, in May, 2000. The Company
does  not  intend  to  continue  this  program  unless  it  obtains  substantial
additional funding or a sponsor.

         Multiple Sclerosis.  Multiple sclerosis ("MS") is a chronic,  sometimes
progressive,  immune-mediated  disease of the  central  nervous  system  that is
believed to occur in genetically  predisposed  individuals following exposure to
an  environmental  factor,  such as virus  infection.  The  disease  affects  an
estimated  250,000  to  350,000  people in the United  States,  primarily  young
adults.  Symptoms of MS,  including vision  problems,  muscle weakness,  slurred
speech,  and poor  coordination,  are believed to occur when the  patient's  own
cells attack and ultimately destroy the insulating myelin sheath surrounding the
brain and spinal  cord nerve  fibers,  resulting  in  improper  transmission  of
signals throughout the nervous system.

         In the United States,  two  recombinant  forms of beta  interferon have
been approved for the treatment of relapsing-remitting  MS. However,  reports in
the scientific  literature  and elsewhere  have  indicated that the  significant
adverse reactions  associated with the treatments may limit their usefulness for
a subset of patients. In addition,  Copaxone(R),  a non-interferon  product, was
approved by the FDA to treat  relapsing-remitting  multiple sclerosis.  Based in
part on  encouraging  anecdotal  reports on the use of ALFERON N Injection in MS
patients,  as well as a  recent  poster  presentation  entitled  "Management  of
Interferon-(beta)1b   (Betaseron)  Failures  in  MS  With   Interferon-(alpha)n3
(Alferon N)",  given at the Charcot  Foundation  Meeting in Switzerland in March
2000, the Company would like to conduct a clinical trial in order to investigate
the potential use of ALFERON N Injection for the treatment of MS.  However,  the
timing of this  trial will be  dependent  upon the  Company's  ability to obtain
substantial additional funding or a sponsor.

         Other HPV Indications or Routes of Administration.  The Company is also
evaluating  whether to  investigate  the potential use of ALFERON N Injection by
subcutaneous  systemic  administration  for  the  treatment  of  genital  warts.
Currently, the approved route of administration is intralesional and requires up
to 16 office  visits  to the  medical  practitioner.  If  subcutaneous  systemic
treatment   were   found  to  be   efficacious,   patients   could   potentially
self-administer  the  product as they have done in many of the  clinical  trials
conducted by the Company. This would make treatment considerably more convenient
for patients.

         In addition,  in the following two publications:  "Adjuvant  Interferon
for Anal Condyloma, A Prospective  Randomized Trial",  Diseases of the Colon and
Rectum 1994,  and  "Interferon  as an Adjuvant  Treatment for Genital  Condyloma
Acuminatum",  International  Journal of  Gynecology & Obstetrics  1995, in which
ALFERON N Injection was studied in conjunction with other treatments for genital
warts,  the authors  reported  that the  addition of ALFERON N Injection  to the
other ablative therapies significantly reduced the recurrence rates. The Company
is evaluating  whether to conduct  clinical  trials to further  investigate  the
potential  use of ALFERON N  Injection  as an  adjuvant  to other  genital  wart
treatments.

         Marketing  and  Distribution.  The Company  does not have its own sales
force.  In June 1998, the Company  entered into an agreement  appointing  ICS, a
subsidiary of Bergen Brunswig Corporation, as the sole United States distributor
of ALFERON N  Injection.  ICS  distributes  ALFERON N Injection  to  wholesalers
throughout the United States.  The Company does not believe that the loss of any
one wholesaler  would have a material  adverse effect on the Company's  sales or
financial position.  Pursuant to such agreement,  ICS also provides clinical and
product information,  reimbursement  information and services, and management of
patient assistance services. Most of the Company's sales have been in the United
States.

         Manufacturing.   The  purified   drug   concentrate   utilized  in  the
formulation  of ALFERON N Injection is  manufactured  in the Company's  facility
located in New Brunswick,  New Jersey, and ALFERON N Injection is formulated and
packaged at a production  facility located in McPherson,  Kansas and operated by
Abbott pursuant to a processing and supply  agreement  entered into in September
1994.  Under the terms of the agreement with Abbott,  the Company pays Abbott an
agreed price to formulate  and package  ALFERON N Injection in  accordance  with
specifications  provided by the Company.  At the present  time,  the Company has
discontinued   production  of  crude  interferon.   The  Company  is  converting
intermediates  to  finished  product  as needed.  The  Company  believes  it has
produced sufficient inventory of these intermediates to satisfy its clinical and
commercial needs for the foreseeable  future.  See "Management's  Discussion and
Analysis of Financial Condition and Results of Operations,"  "Business - ALFERON
N Injection - Clinical  Trials for New  Indications,"  "Business -  Governmental
Regulation," and "Properties."

         Competition.  Presently, INTRON A, manufactured by Schering, is the one
other  injectable  interferon  product  approved by the FDA for the treatment of
genital warts.  INTRON A is made from recombinant  alpha  interferon.  Since the
production of INTRON A is not dependent on a source of human blood cells, it may
be able to be  produced  in greater  volume  and at a lower cost than  ALFERON N
Injection.  Currently,  the  Company's  wholesale  price on a per unit  basis of
ALFERON N Injection is  substantially  higher than that of INTRON A. In 1997, 3M
Pharmaceuticals   received  FDA  approval  for  its  immune-response   modifier,
Aldara(R),  a  self-administered  topical  cream,  for the treatment of external
genital and perianal  warts.  ALFERON N Injection  also competes with  surgical,
chemical, and other methods of treating genital warts. The Company cannot assess
the impact from products  developed by the Company's  competitors or advances in
other methods of the treatment of genital warts on the  commercial  viability of
its product.

         If and when the Company obtains approvals for additional indications of
ALFERON N  Injection,  it expects to compete  primarily  on the basis of product
performance  and price with a number of  pharmaceutical  companies,  both in the
United States and abroad.

         A number of synthetic  antiviral  compounds  have been  approved in the
United  States and certain  foreign  countries for the  treatment,  primarily in
combination  therapy,  of HIV infection and AIDS. Shown in Table 1 below are the
drugs,  which are  currently  approved in the United States for the treatment of
patients infected with HIV.


<TABLE>
<CAPTION>

         Table 1: HIV Antiretroviral Drugs Approved in the United States

Class of Drug                Brand Name      Generic Name               Manufacturer
<S>                          <C>             <C>    <C>                 <C>
Nucleoside Reverse           Combivir(R)     Zidovudine + Lamivudine    Glaxo Wellcome
Transcriptase Inhibitors     Epivir(R)       Lamivudine                 Glaxo Wellcome
                             Hivid(R)        Zalcitabine                Hoffmann-La Roche
                             Retrovir(R)     Zidovudine                 Glaxo Wellcome
                             Videx(R)        Didanosine                 Bristol-Myers Squibb
                             Zerit(R)        Stavudine                  Bristol-Myers Squibb
                             Ziagen(R)       Abacavir                   Glaxo Wellcome
Non-Nucleoside Reverse       Rescriptor(R)   Delavirdine                Pharmacia & Upjohn
Transcriptase Inhibitors     Viramune(R)     Nevirapine                 Boehringer Ingelheim
                             Sustiva(R)      Efavirenz                  DuPont-Merck
Protease Inhibitors          Crixivan(R)     Indinavir                  Merck & Co.
                             Invirase(R)     Saquinavir                 Hoffmann-La Roche
                             Fortovase(R)    Saquinavir                 Hoffmann-La Roche
                             Norvir(R)       Ritonavir                  Abbott Laboratories
                             Viracept(R)     Nelfinavir                 Agouron Pharmaceuticals
                             Agenerase(R)    Amprenavir                 Glaxo Wellcome
</TABLE>


         Schering's  recombinant  interferon product is already approved for the
treatment of hepatitis C and hepatitis B in the United States and other markets,
as well as for many other  medical  uses.  Roche  Pharmaceuticals's  recombinant
interferon  product has been  approved  for the  treatment of hepatitis C in the
United  States and for other  medical  uses in the United  States and in foreign
countries. In addition, Amgen Inc.'s recombinant interferon,  Infergen(R),  also
known as consensus  interferon product, as well as Glaxo Wellcome's cell culture
derived interferon,  Wellferon(R), are approved for the treatment of hepatitis C
in the United States.

         In the United States, two recombinant forms of beta interferon, Biogen,
Inc.'s  Avonex(R) and Berlex  Laboratories'  Betaseron(R) as well as Teva Marion
Partners'  Copaxone(R),  a  non-interferon  product,  have been approved for the
treatment of relapsing-remitting MS.

         Many of the  Company's  potential  competitors  are among  the  largest
pharmaceutical  companies  in the  world,  are well  known to the public and the
medical  community,  and have  substantially  greater  financial  resources  and
product development,  manufacturing, and marketing capabilities than the Company
or its marketing  partners.  Therefore,  there can be no assurance  that, if the
Company is able to obtain  regulatory  approval of ALFERON N  Injection  for the
treatment of any additional diseases, it will be able to achieve any significant
penetration into those markets.

ALFERON N Gel

         ALFERON N Gel is a topical,  Natural Alpha Interferon preparation which
the Company has  developed  and  believes  has  potential  in the  treatment  of
cervical dysplasia, intravaginal warts, and mucocutaneous and genital herpes.

         Cervical  Dysplasia.  Affecting  approximately  500,000 to one  million
women each year in the United  States  alone,  cervical  dysplasia,  or abnormal
cervical cells, has been identified as a potential precursor to cervical cancer.
Cervical  cancer  strikes  approximately  13,000 women in the United States each
year,  causing 5,000  deaths,  and is  responsible  for more than half a million
deaths  worldwide.  Cervical  dysplasia is caused by certain strains of HPV, the
same family of viruses that causes  genital  warts.  The Company has completed a
small   Phase   2   dose-ranging    study   using   ALFERON   N   Gel   at   the
Columbia-Presbyterian  Medical  Center  in New  York for the  treatment  of mild
cervical dysplasia.  Pap smears,  identification tests for the presence and type
of virus, and cervical biopsies indicated that ALFERON N Gel appears to have the
potential  for  improving  the course of cervical  dysplasia as indicated in the
majority of patients who completed the treatment  course.  The Company presently
does not plan to start additional  clinical trials for this indication unless it
can find a sponsor.

         Other  Widespread  Dermatological  Lesions  Potentially  Treatable with
ALFERON N Gel Therapy.  Nearly 30 million  people in the U.S. are infected  with
the herpes  simplex  type II virus,  which is the  infectious  virus that causes
genital herpes. Up to 500,000 new cases are reported each year, according to the
Alan  Guttmacher  Institute.  To  date,  there is no cure  for  genital  herpes.
Preliminary  findings with a previous  formulation of recombinant  interferon in
the Company's  proprietary gel showed  significant  shortening of the contagious
period and relief of symptoms,  but the Company will not start  clinical  trials
unless additional funding or a sponsor is secured.

         ALFERON N Gel may also be beneficial to immunocompromised patients with
mucocutaneous  herpes.  Patients with this form of herpes suffer from persistent
skin lesions,  which have become  resistant to existing  therapies.  The Company
will not start clinical trials for this indication unless additional  funding or
a sponsor is secured.

         ALFERON N Gel may also be of benefit to patients who have  intravaginal
warts.  However,  the Company will not start clinical trials for this indication
unless additional funding or a sponsor is secured.

         Marketing  and  Distribution.  The Company does not have any  marketing
agreement  with respect to ALFERON N Gel and, if FDA  approval is  obtained,  no
assurance  can be given that the Company  will be able to enter into a marketing
agreement on terms  satisfactory to the Company.  The Company may also choose to
market ALFERON N Gel itself if FDA approval is obtained.

         Competition.  The Company  believes that three  antiviral  products are
presently  sold in the United  States for the  treatment  of  recurrent  genital
herpes:  Zovirax(R)  (manufactured  by  Glaxo  Wellcome,  Inc.)  which  contains
acyclovir and is administered  orally,  topically,  or intravenously,  Famvir(R)
(manufactured by SmithKline Beecham  Pharmaceuticals) which contains famcyclovir
and is  administered  orally,  and Valtrex(R)  (manufactured  by Glaxo Wellcome,
Inc.) which contains  valacyclovir  and is also  administered  orally.  The only
current treatment for cervical dysplasia in the United States is surgery,  while
intravaginal warts are treated with ablative therapy.

ALFERON LDO

         ALFERON  LDO  is a  low  dose  oral  liquid  Natural  Alpha  Interferon
preparation  that the Company has  developed  and believes has  potential in the
treatment  of several  quality-of-life  parameters  of  importance  to  patients
infected with HIV.

         Clinical  Trials for ALFERON LDO. As described  below,  the Company has
completed two Phase 2 clinical  trials for its ALFERON LDO  formulation  for the
treatment of HIV-infected patients. In addition, a National Institute of Allergy
and  Infectious  Diseases  ("NIAID")  sponsored  Phase 3 trial  in  HIV-infected
patients  has been  concluded  in which  ALFERON LDO was  included as one of the
treatments.

         HIV-infected  patients.  The Company  has  completed  two  double-blind
studies at Mount Sinai Medical Center in New York involving ALFERON LDO. One was
a  placebo-controlled  study in AIDS-related  complex ("ARC") patients,  and the
other was a dose  ranging  study in AIDS or ARC  patients.  The results from the
placebo-controlled  study  did not  demonstrate  a  significant  improvement  or
alteration  in the  expected  progression  of  the  disease,  although  patients
receiving  ALFERON LDO reported greater energy and appetite than those given the
placebo.  The results from the dose ranging study indicate that one of the doses
may promote weight gain and an increase in energy and overall well-being. At the
insistence  of AIDS  groups and  community-based  physicians  who had been using
low-dose oral  formulations of interferon in their practice,  the NIAID launched
in 1996 a Phase 3 trial of  three  preparations  of  low-dose  oral  interferon,
including ALFERON LDO and matching placebos.  An advisory committee comprised of
representatives  from the  Company  and  other  interferon  manufacturers,  AIDS
Support groups, the FDA, and the National  Institutes of Health was organized to
design this multicenter study, which examined the effectiveness of low dose oral
alpha interferon therapy on several quality-of-life  parameters of importance to
patients  infected  with  HIV.  Patients  enrolled  in the study  were  randomly
assigned to one of four treatment groups, with all participants  receiving three
preparations.  In three of the groups, patients received one active compound and
two placebos.  Patients in the fourth group received only  placebos.  This was a
double-blind study and had a six-month  treatment phase and six-month  follow-up
period. While in the study, patients were permitted to take antiretroviral drugs
and therapies against  opportunistic  infections.  The Company provided clinical
quantities of ALFERON LDO for use in the study.

         In June 1997, NIAID terminated enrollment in this study with 247 out of
the  required 560  patients  enrolled.  Even though the trial did not enroll the
number of patients the advisory  committee had deemed  necessary to determine if
the drugs were effective,  the results were published in the Journal of Acquired
Immune  Deficiency  Syndromes  in December of 1999.  In that article the authors
concluded: "Although the trial was designed to enroll 560 study subjects and was
prematurely   terminated   because  of  slow  accrual  and   discontinuation  of
participants,  the small differences among the arms in the primary and secondary
endpoints  do not support  claims of efficacy  for the  measures  studied."  The
Company does not presently anticipate the further development of ALFERON LDO for
this use or any other use unless a sponsor is secured.

         Marketing  and  Distribution.  The  Company  does not have a  marketing
agreement  with  respect to ALFERON LDO and,  if FDA  approval of ALFERON LDO is
obtained,  no assurance can be given that the Company will be able to enter into
a marketing  agreement for such products on terms  satisfactory  to the Company.
The  Company may also  choose to market  ALFERON  LDO itself if FDA  approval is
obtained.

         Competition.  Under the terms of a licensing agreement (as amended, the
"Amarillo  Agreement") with Amarillo  Bioscience,  Inc.  (formerly Amarillo Cell
Culture  Company,  Incorporated)  ("Amarillo") (i) the Company has the exclusive
right to sell ALFERON LDO,  containing  Natural Alpha Interferon,  in the United
States and all foreign  countries  other than Japan,  (ii)  Amarillo  and Pharma
Pacific  Management  Pty.  Ltd.  ("PPM"),  a company  which has also  obtained a
license  from  Amarillo,  each has the right to sell any  interferon  other than
Natural Alpha  Interferon in the United States and all foreign  countries  other
than Japan, and (iii) Hayashibara  Biochemical  Laboratory has the right to sell
its low dose alpha  interferon  in Japan.  See "Business -- Licenses and Royalty
Obligations." Therefore,  with respect to low dose oral interferon products, the
Company will potentially  compete with Amarillo and PPM in the United States and
in the  rest  of  the  world  except  Japan  and  with  Hayashibara  Biochemical
Laboratory in Japan. In addition,  the Company will potentially compete with the
manufacturers  of the synthetic  antiviral  compounds that have been approved in
the United  States and certain  foreign  countries  for the treatment of HIV and
AIDS. See "Business -- ALFERON N Injection -- Competition".

Patents

         In 1996, the Company was issued a United States patent, comprised of 15
claims, for Natural Alpha Interferon.  The two major claims are for (i) a highly
purified  Natural Alpha  Interferon  composition  produced from human peripheral
blood  leukocytes and (ii) an improved method to produce this  composition.  The
issuance of this patent gives the Company  protection for the manufacture,  use,
and sale of its  Natural  Alpha  Interferon  product  in the  United  States and
prevents a competitor from producing or using  equivalent  products derived from
human  peripheral  blood  leukocytes.  Patents have also been issued in selected
foreign countries. In 1997, the Company was issued a second United States patent
which  broadens  the  scope of the  first one to cover  certain  individual,  or
mixtures of, alpha interferon species present in Natural Alpha Interferon.

         Also in 1996, the Company was issued a United States patent,  comprised
of four claims that will expand the Company's portfolio on overall  technologies
in the interferon field. The biological activities of interferon take place when
the interferon binds to Type 1-interferon  receptor proteins,  which are present
in  various  human  cells.  The  major  claim is the  composition  claim  for an
interferon receptor protein  specifically binding alpha and beta, but not gamma,
interferons.  The receptor,  which is isolated from a cancerous cell line, binds
both  natural and  recombinant  alpha  interferons  and is a variant form of the
human  interferon  receptor  (Type 1) that has been found in some cases of acute
leukemia.  The claimed receptor  protein could be used to produce  anti-receptor
antibodies  that may have  potential  use in  diagnostic  testing  for tumors or
cancers that have an abnormal number of receptors.  The claimed receptor protein
may also have  potential use as a therapeutic  agent for those  diseases,  which
have  aberrant  production of  interferon,  by binding to and  neutralizing  the
excess interferon.

         The United  States  Patent  and  Trademark  Office has also  issued two
patents to the Company, that disclose and claim topical interferon preparations.
The patents encompass interferon preparations for the topical delivery of one or
more  interferons  to the site of a disease  that  responds  therapeutically  to
interferon,  and a system for  delivering  interferon  topically  that  prevents
oxidation of the protein.  The  inventions  specifically  encompass  the topical
treatment for treating  viral  diseases,  such as herpes  genitalis,  with alpha
interferon.

         In 1999, the Company was issued a United States patent, comprised of 16
claims,  that  describes an innovative  method for recovery of white blood cells
from  recycled  filters.  Major blood  centers in the United  States and foreign
countries  have been  adopting a process to use  filters to deplete  white blood
cells (leukoreduction) from plasma, red blood cells, platelets,  and other blood
preparations.  Typically,  these  filters  that  contain a large amount of white
blood cells are discarded. The new invention provides an efficient back-flushing
method to recover  functional  white blood cells from these  filters.  The white
blood  cells  recovered  can be used for  production  of  interferons  and other
cytokines  for use as  therapeutic  products.  They can also be used for further
isolation of subsets of white blood cells for  development of new  immunological
products.  This invention  protects the Company's ability to utilize white blood
cells collected in the filters for interferon production when the leukoreduction
process is uniformly  implemented  in blood  centers.  An  international  patent
application was filed in December 1998.

Licenses and Royalty Obligations

         Hoffmann has been issued  patents  covering  human alpha  interferon in
many  countries   throughout  the  world.  In  1995,  the  Company   obtained  a
non-exclusive  perpetual  license from Hoffmann (the "Hoffmann  Agreement") that
grants the  Company  the  worldwide  rights to make,  use,  and sell,  without a
potential patent  infringement  claim from Hoffmann,  any formulation of Natural
Alpha Interferon.  The Hoffmann Agreement permits the Company to grant marketing
rights with  respect to Natural  Alpha  Interferon  products  to third  parties,
except that the Company cannot grant marketing rights with respect to injectable
products  in any  country in which  Hoffmann  has patent  rights  covered by the
Hoffmann Agreement (the "Hoffmann Territory") to any third party not listed on a
schedule of approximately 50 potential marketing partners without the consent of
Hoffmann, which consent cannot be unreasonably withheld.

         Under the terms of the Hoffmann Agreement,  the Company is obligated to
pay  Hoffmann an aggregate  royalty on net sales (as  defined) of Natural  Alpha
Interferon  products by the Company in an amount equal to (i) 8% of net sales in
the Hoffmann  Territory,  and 2% of net sales outside the Hoffmann  Territory of
products manufactured in the Hoffmann Territory,  up to $75,000,000 of net sales
in any calendar year and (ii) 9.5% of net sales in the Hoffmann  Territory,  and
2% of net sales outside the Hoffmann  Territory of products  manufactured in the
Hoffmann Territory,  in excess of $75,000,000 of net sales in any calendar year,
provided  that the total  royalty  payable in any calendar year shall not exceed
$8,000,000.  The Hoffmann Agreement can be terminated by the Company on 30 days'
notice with respect to the United States patent,  any individual foreign patent,
or all patents owned by Hoffmann.  If the Hoffmann  Agreement is terminated with
respect to the patents owned by Hoffmann in a specified country, such country is
no longer included in the Hoffmann Territory. Accordingly, the Company would not
be permitted to market any formulation of alpha interferon in such country.

         In 1989,  the Company  entered into the Amarillo  Agreement.  Amarillo,
which is located in  Amarillo,  Texas,  is in the  business of the  research and
development of animal health products and became a public company in 1996. Under
the terms of the Amarillo  Agreement,  the Company has a  non-exclusive  license
under all of Amarillo's  issued  patents,  patent  applications,  and "know-how"
relating to the treatment of humans by the oral  administration of Natural Alpha
Interferon  in low doses.  In  addition,  Amarillo has the right to purchase the
Company's  Natural Alpha  Interferon  for use in the animal health market and is
obligated to pay  royalties to the Company  based upon sales using the Company's
Natural Alpha Interferon.

         The Company will be  obligated to pay Amarillo  royalties of 10% on the
sales of Natural Alpha Interferon  products using Amarillo's patented technology
as determined under the Amarillo Agreement.  In addition, the Company is a party
to certain license  agreements,  including the Hoffmann  Agreement,  pursuant to
which it is obligated to pay royalties  based upon  commercial  exploitation  of
ALFERON N Gel and ALFERON LDO. Under the terms of such license  agreements,  the
Company  would pay  royalties of up to 13.5% and 19.5% of net sales of ALFERON N
Gel and ALFERON LDO, respectively.

         On  September  15,  2000,  Amarillo  gave  notice to the Company of its
intention to  terminate  the Amarillo  License  Agreement.  The Company does not
believe it has breached the terms of the Amarillo  License  Agreement.  However,
even if the Amarillo  License  Agreement were  terminated,  the Company does not
believe it would have a material  adverse  effect on the  Company's  business or
prospects.

         In addition,  the Company  agreed to pay GP  Strategies a royalty of $1
million in connection with the acquisition of certain intellectual  property and
technology  rights  from GP  Strategies.  Such amount is payable if and when the
Company  generates  income  before  taxes,  limited to 25% of such income before
income taxes per year until the amount is paid in full. To date, the Company has
not generated  income  before taxes and  therefore has not paid  royalties to GP
Strategies.

Recent Developments

         On July 28,  2000,  the  Company  acquired  for  $100,000  an option to
purchase certain  securities of Metacine on the terms set forth below.  Metacine
will use such funds to retain a third party to conduct a review and  analysis of
Metacine's  intellectual  property.  The option may be  exercised by the Company
during the 60-day  period  following  the  Company's  receipt of such review and
analysis, which is required to be delivered to the Company by December 15, 2000.

         If the  option  is  exercised,  Metacine  is  required  to issue to the
Company 700,000 shares of Metacine common stock and a warrant to purchase,  at a
price of $12.48 per share,  178,056 shares of Metacine  common stock in exchange
for  $150,000  in cash,  $250,000  of  services to be rendered by the Company to
Metacine,  and shares of the  Company's  common  stock  having a market value of
$2,000,000.  The Company is also required to pay Metacine the amount, if any, by
which the net proceeds  from the sale by Metacine of the shares of the Company's
common stock is less than $2,000,000.

         Metacine  presently has outstanding  150,000 shares of common stock and
has issued warrants to purchase, at a price of $.01 per share, 752,500 shares of
Metacine common stock.

         The Company and the other  stockholders of Metacine have entered into a
stockholders' agreement providing for rights of first refusal, tag-along rights,
and  preemptive  rights.  The agreement also provides that the Company will have
one  representative  on  Metacine's  board and will vote its  shares in the same
proportion as Metacine's other stockholders,  and that certain corporate actions
will not be taken without the Company's consent.

         The  essential  feature  of  Metacine's  therapeutic  strategy  is  the
modification  and targeted  activation  of dendritic  cells  ("DC"),  the body's
primary  antigen  presenting  cell, for the treatment of first cancer,  and then
viral disease, autoimmune disease and organ transplant rejection. The deployment
of DCs results in a cellular  immune  response  culminating in the production of
two types of  target-specific  T cells (cytolytic and helper) that team together
to find and destroy tumors and virally infected cells.  For effective  treatment
of cancer (and chronic viral  infections),  a patient requires a large number of
cytolytic  and  helper  T  cells.  In the  case  of  transplant  rejection  (and
auto-immune disease), too many existing T cells attack donor (or normal) tissue,
ultimately  killing the donated  organ.  Production of these T cells needs to be
curtailed to improve the chances of a successful outcome.

         Metacine, whose founding scientists have received more than $25 million
in Federal grants for DC research,  is pursuing four different approaches to the
therapeutic use of DCs for the treatment of cancer:  (1) ex vivo cell processing
using DCs pulsed with known antigens to create allogenic  vaccines,  (2) ex vivo
cell  processing  using  patient DCs cultured with patient tumor cells to create
multi-epitope,  patient specific, autologous vaccines, (3) in vivo activation of
DCs to stimulate the patient's immune system to attack the primary tumor as well
as metastatic  sites, and (4) use of DCs as  "intelligent"  gene therapy vectors
that carry  therapeutic genes to the primary tumor, then stimulate the patient's
immune system to attack the tumor and any metastatic sites.

         Metacine's  program  for  prevention  of  organ  transplant   rejection
represents  another important area of application for DCs. Ex vivo culturing and
re-introduction of tolerogenic DCs down-regulates the patient's immune system by
flooding  the  system  with DCs that do not  present  the  transplanted  organ's
antigens.  Mouse  models in which  tolerogenic  DCs are  introduced  to  prevent
rejection of transplanted tissue have shown highly positive results as evidenced
by reduction of  detrimental  host vs. graft immune  response,  and  significant
extension of life following organ transplant.

         A general  lack of side effects has been  observed by Metacine,  and by
others  investigating  DC-based  therapy,  in human  clinical  trials,  which is
probably due to the fact that the technology  utilizes the body's own cells, and
antigens that are already present in the body.

Governmental Regulation

         Regulations imposed by U.S. federal,  state, and local authorities,  as
well as their  counterparts in other countries,  are a significant factor in the
conduct of the research,  development,  manufacturing,  and marketing activities
for present and proposed products developed by the Company.

         The  Company's  or  its  licensees'  potential  products  will  require
regulatory  approval by  governmental  agencies prior to  commercialization.  In
particular,  human  medical  products are subject to rigorous  pre-clinical  and
clinical  testing and other approval  procedures by the FDA in the United States
and similar health  authorities in foreign  countries.  Various  federal and, in
some  cases,  state  statutes  and  regulations  also  govern or  influence  the
manufacturing,  safety, labeling, storage, record keeping, and marketing of such
products,  including the use, manufacture,  storage,  handling,  and disposal of
hazardous  materials and certain waste products.  The process of obtaining these
approvals and the  subsequent  compliance  with  applicable  federal and foreign
statutes  and  regulations  involves a  time-consuming  process and requires the
expenditure of substantial resources.

         The effect of government  regulation may be to delay for a considerable
period of time or prevent  the  marketing  of any  product  that the Company may
develop and/or impose costly procedures on the Company's activities,  the result
of which may be to furnish an advantage to the Company's competitors.  Any delay
in  obtaining or failure to obtain such  approvals  would  adversely  affect the
marketing of the Company's products and the ability to earn product revenue.

         Before  testing  of any  agents  with  potential  therapeutic  value in
healthy  human  test  subjects  or  patients  may  begin,  stringent  government
requirements for pre-clinical data must be satisfied.  These data, obtained from
studies in several  animal  species,  as well as from  laboratory  studies,  are
submitted in a Notice of Claimed Investigational Exemption for a New Drug or its
equivalent  in  countries  outside  the U.S.  where  clinical  studies are to be
conducted.  If the  necessary  authorizations  are  received,  the Company  then
conducts clinical tests of its products on human beings at various  unaffiliated
medical  centers and  institutions.  Initial trials (Phase 1) are conducted on a
small  number of  volunteers  to  determine  whether  the drug is safe for human
beings.  If the initial  trials  demonstrate  the safety of the product,  trials
(Phase 2) are then conducted on patients  affected with the disease or condition
under  investigation  to  establish  the proper  dose and dosing  interval.  The
findings  of these  trials  are then used to design  and  implement  large-scale
controlled  trials (Phase 3) to provide  statistical  proof of effectiveness and
adequate evidence of safety to meet FDA and/or foreign approval requirements.

         The FDA closely monitors the progress of each of the phases of clinical
testing and may, at its discretion,  re-evaluate,  alter,  suspend, or terminate
the testing based on the data which have been  accumulated to that point and its
assessment of the risk/benefit ratio to the patient. Estimates of the total time
required for completing  clinical testing vary between four and ten years.  Upon
successful  completion  of clinical  testing of a new drug, a company  typically
submits  to FDA a New  Drug  Application  ("NDA"),  or for  previously  approved
biological   products   such  as  Natural  Alpha   Interferon,   a  Product  and
Establishment License Application  ("PLA/ELA") or for newly submitted biological
products a single Biological  License  Application  ("BLA") which summarizes the
results and observations of the product during the clinical trials.

         Each  facility,  in which  products are produced and packaged,  whether
operated  by the Company or a third  party,  must meet the FDA's  standards  for
current  good  manufacturing  practices  and  must  also be  approved  prior  to
marketing any product  produced or packaged in such  facility.  Any  significant
change in the production  process that may be commercially  required,  including
changes in sources of certain raw  materials,  or any change in the  location of
the  production  facilities  will also  require  FDA  approval.  To the extent a
portion of the manufacturing process for a product is handled by an entity other
than the Company,  the Company must similarly receive FDA approval for the other
entity's  participation in the  manufacturing  process.  The Company has entered
into an agreement with Abbott,  pursuant to which Abbott formulates and packages
ALFERON N Injection.  The Company  presently has a license for the facilities in
which it produces  ALFERON N Injection,  which  includes the facilities in which
Abbott  formulates and packages ALFERON N Injection.  In addition,  FDA approval
would  have to be  obtained  if the  Company  should  choose  to use an  outside
formulator and/or packager for ALFERON N Gel or ALFERON LDO.

         Once the  manufacture  and sale of a product is  approved,  various FDA
regulations  govern the  production  processes and marketing  activities of such
product. A post-marketing  testing,  surveillance,  and reporting program may be
required to monitor the product's  usage and effects.  Product  approvals may be
withdrawn,  or other  actions  may be ordered,  if  compliance  with  regulatory
standards is not maintained.

         Each individual lot of Natural Alpha Interferon produced must be tested
for  compliance  with  specifications  and released for sale by the FDA prior to
distribution in the marketplace. Even after initial FDA marketing approval for a
product has been granted,  further studies may be required to provide additional
data on safety or  efficacy;  to obtain  approval  for  marketing a product as a
treatment  for  specific  diseases  other than those for which the  product  was
originally  approved;  to change the dosage levels of a product;  to support new
safety  or  efficacy   claims  for  the  product;   or  to  support  changes  in
manufacturing methods, facilities, sources of raw materials, or packaging.

         In many markets, effective commercialization also requires inclusion of
the product in national, state, provincial, or institutional formularies or cost
reimbursement  systems.  The impact of new or changed laws or regulations cannot
be predicted  with any  accuracy.  The Company uses its own staff of  regulatory
affairs   professionals  and  outside   consultants  to  enable  it  to  monitor
compliance,  not only with FDA laws and  regulations,  but also  with  state and
foreign government laws and regulations.

         Promotional  and  educational  communications  by the  Company  and its
distributors  also are  regulated by the FDA and are  governed by statutory  and
regulatory  restrictions and FDA policies  regarding the type and extent of data
necessary to support  claims that may be made.  The Company  currently  does not
have data  adequate  to satisfy  FDA  requirements  with  respect  to  potential
comparative  claims between Natural Alpha  Interferon and competing  recombinant
interferon products.

         For  marketing  outside the United  States,  the  Company  will also be
subject to foreign  regulatory  requirements  governing  human clinical  trials,
manufacturing,  and marketing approval for drugs and other medical products. The
requirements  governing  the  conduct of  clinical  trials,  product  licensing,
pricing,  and reimbursement vary widely from country to country.  In addition to
its United States approval, ALFERON N Injection has received regulatory approval
in Mexico, Germany, Hong Kong, and Singapore, and registration filings have been
submitted in certain other countries.

         Under certain circumstances,  the Company may be required to obtain FDA
authorization to export products for sale in foreign countries. For instance, in
most cases,  the Company may not export  products that have not been approved by
the FDA unless it first  obtains an export permit from the FDA.  However,  these
FDA export  restrictions  generally do not apply if the  Company's  products are
exported in conformance  with their United States  approvals or are manufactured
outside the United  States.  At the present time,  the Company does not have any
foreign manufacturing facilities.

Research Staff and Employees

         As of October 31, 2000,  the Company had 38  employees,  5 of whom work
less than full time. Of the 38 employees,  7 hold Ph.D. degrees, 1 holds an M.D.
degree and 15 hold other  degrees in  scientific  or technical  fields.  Of such
employees,  approximately 7 were engaged in research and product development, 10
were engaged in quality  control,  regulatory and quality  assurance and product
and process  improvement  for  manufacturing,  7 were engaged in engineering and
maintenance,  4 were  engaged  in  medical  affairs  and  10  were  general  and
administrative personnel.

Research and Development

         During the years ended  December 31, 1999,  1998, and 1997, the Company
expended   approximately  $3.1  million,   $8.7  million,   and  $11.9  million,
respectively   for  research  and  development.   Substantially   all  of  these
expenditures were for Company-sponsored research and development programs.

Foreign and Domestic Operations and Export Sales

         All of the Company's material operations and sales are conducted in the
United States.

Properties

         The Company owns two freestanding  buildings  comprising  approximately
44,000 square feet which are located in New Brunswick,  New Jersey.  The Company
uses  the  facilities  for  staff  offices,  for the  conversion  of  interferon
intermediates to finished product,  for quality control and research activities,
and for the storage of raw, in process and finished materials.

         The Company  believes  that its current  facilities  and  equipment are
suitable  and  adequate  for research  and  development  and the  conversion  of
interferon intermediates to finished product, and in good condition.

Legal Proceedings

         The Company is not a party to any legal proceedings.


<PAGE>



                                   MANAGEMENT

Executive Officers

         The following table sets forth the names of the directors and principal
executive officers of the Company as of September 30, 2000, their positions with
the Company, and their principal business experience for the last five years.

<TABLE>


Name                                                  Age                  Position
<S>                                                   <C>                  <C>
Samuel H. Ronel, Ph.D                                 64                   Chairman of the Board

Lawrence M. Gordon                                    47                   Chief Executive Officer and a
                                                                           Director

Stanley G. Schutzbank, Ph.D., R.A.C.                  55                   President and a Director

Donald W. Anderson                                    51                   Controller (Principal
                                                                           Accounting and Financial
                                                                           Officer) and Secretary

Mei-June Liao, Ph.D.                                  49                   Vice President, Research and
                                                                           Development

James R. Knill, M.D.                                  67                   Vice President, Medical Affairs

Robert P. Hansen                                      56                   Vice President, Manufacturing

Sheldon L. Glashow                                    67                   Director

</TABLE>

         Samuel H. Ronel,  Ph.D.  has been Chairman of the Board since  February
1997 and was Vice  Chairman of the Board from January 1996 to February  1997 and
President,  Chief Executive Officer,  and a director of the Company from 1981 to
January 1996. He was  responsible  for the interferon  research and  development
program since its inception in 1979.  Dr. Ronel joined GP Strategies in 1970 and
served as the Vice President of Research and Development of GP Strategies and as
the President of Hydro Med Sciences,  a division of GP Strategies,  from 1976 to
September   1996.   Dr.  Ronel  served  as  President  of  the   Association  of
Biotechnology  Companies,  an  international  organization  representing  United
States and foreign  biotechnology firms, from 1986-88 and has served as a member
of its Board of  Directors  until  1993.  Dr.  Ronel was elected to the Board of
Directors of the  Biotechnology  Industry  Organization from 1993 to 1995 and to
the Governing Body of the Emerging  Companies  Section from 1993 to 1997.  Since
1999 he has been a member of the  Technology  Advisory  Board of the New  Jersey
Economic Development Authority.

         Lawrence M. Gordon has been Chief  Executive  Officer and a director of
the Company since January 1996,  Vice President of the Company from June 1991 to
January 1996, General Counsel of the Company from 1984 to January 1996.

         Stanley G.  Schutzbank,  Ph.D.  has been President of the Company since
January 1996, Executive Vice President of the Company from 1981 to January 1996,
and a  director  of the  Company  since  1981 and has been  associated  with the
interferon  research and development  program since its inception in 1979. He is
involved with all facets of  administration  and planning of the Company and has
coordinated compliance with FDA regulations governing manufacturing and clinical
testing of  interferon,  leading to the approval of ALFERON N Injection in 1989.
Dr. Schutzbank joined GP Strategies in 1972 and served as the Corporate Director
of Regulatory and Clinical  Affairs of GP Strategies from 1976 to September 1996
and as Executive  Vice  President  of Hydro Med Sciences  from 1982 to September
1996. Dr. Schutzbank is a member of the Regulatory Affairs Professionals Society
("RAPS")  and has served as Chairman  of the  Regulatory  Affairs  Certification
Board from its inception until 1994. Dr. Schutzbank received the 1991 Richard E.
Greco  Regulatory  Affairs  Professional of the Year Award for his leadership in
developing  the United  States  Regulatory  Affairs  Certification  Program.  In
September 1995, Dr. Schutzbank was elected to serve as  President-elect in 1996,
President in 1997, and Chairman of the Board in 1998 of the  Regulatory  Affairs
Professionals  Society.  In August 2000, Dr. Schutzbank was notified that he has
been selected to receive "The Leonard J. Stauffer"  Award from RAPS.  This award
is presented to an individual holding the RAC certification who has demonstrated
exceptional  service  to  the  certification  program  and/or  mentoring  in the
profession.

         Donald W.  Anderson has been the  Controller  of the Company since 1981
and Corporate  Secretary of the Company since 1988. He was an officer of various
subsidiaries of GP Strategies from 1976 to September 1996.

               Mei-June  Liao,  Ph.D.  has been  Vice  President,  Research  and
          Development  of the  Company  since  March  1995.  She has served as a
          Director, Research & Development since 1987, and held senior positions
          in the Company's  Research & Development  Department  since 1983.  Dr.
          Liao  received  her  Ph.D.   from  Yale  University  and  completed  a
          three-year postdoctoral  appointment at the Massachusetts Institute of
          Technology   under  the  direction  of  Nobel  Laureate  in  Medicine,
          Professor H. Gobind  Khorana.  Dr. Liao has authored  many  scientific
          publications and invention disclosures.

         James R. Knill,  M.D. has been Vice  President,  Medical Affairs of the
Company since  September 1996 and a consultant to the Company from November 1995
to September  1996. Dr. Knill was employed as Vice President of Medical  Affairs
for  Cytogen  Corporation  from  1994  to 1995  and as  consultant  for  Cytogen
Corporation from 1995 to July 1996. He was previously  employed for more than 20
years as Vice President of Medical Affairs for Bristol-Myers Squibb Company.

         Robert P. Hansen has been Vice President,  Manufacturing of the Company
since  February 1997. He served as a Director of  Manufacturing  since 1995, and
held senior positions in the Company's Manufacturing Department since 1987.

               Sheldon L.  Glashow,  Ph.D.  has been a director  of the  Company
          since 1991.  He has been a director  of GP  Strategies  since 1987,  a
          director of GSE Systems,  Inc.  since 1995,  and a director of CalCol,
          Inc. since 1994.  Dr. Glashow is the Higgins  Professor of Physics and
          the Mellon Professor of the Sciences at Harvard  University.  He was a
          Distinguished  Professor  and visiting  Professor of Physics at Boston
          University. In 1971, he received the Nobel Prize in Physics.


<PAGE>


Executive Compensation

         The following  table presents the  compensation  paid by the Company to
its Chief  Executive  Officer and the  Company's  four most  highly  compensated
executive officers for 1999, 1998, and 1997.

<TABLE>
<CAPTION>


                                                    Summary Compensation Table
                                                                                                 Long-Term
                                                      Annual Compensation         Compensation Awards
                                                      -------------------      -----------------------------
                                                                                 Stock             All Other
                                    Year              Salary       Bonus       Options           Compensation
Name and Principal Position                            ($)         ($)          (#)                 ($) (3)
---------------------------         ----              ------      ------       --------          ------------
<S>                                 <C>               <C>           <C>         <C>                 <C>

Lawrence M. Gordon                  1999              135,800(1)     - 0 -       400,000             9,059
Chief Executive Officer             1998              270,000      103,000        60,000            10,000
                                    1997              135,000(2)     - 0 -        42,525             4,718

Samuel H. Ronel, Ph.D.              1999              103,000(1)     - 0 -       250,000
8,916

Chairman of the Board               1998              213,000       27,000        40,000            10,000
                                    1997              205,154        - 0 -        51,200             5,083

Stanley G. Schutzbank, Ph.D.        1999              123,400(1)     - 0 -       400,000             8,261
President                           1998              251,000       77,000        60,000            10,000
                                    1997              231,302        - 0 -        51,750             4,860

James Knill, M.D.                   1999              120,800(1)     - 0 -        50,375            12,692
Vice President                      1998              170,000       16,800        10,000            10,000
Medical Affairs                     1997              130,646        - 0 -        15,400             3,582

Mei-June Liao, Ph.D.                1999              113,200(1)     - 0 -        81,075             6,952
Vice President, Research            1998              133,000       16,500        15,000             7,500
and Development                     1997              122,380        - 0 -         7,325             3,744

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

(1)      In 1999, due to the financial condition of the Company, Messrs. Gordon, Ronel, Schutzbank, Knill and Ms. Liao reduced the
      number of hours per week they worked for the Company.

(2)      In 1997, Mr. Gordon spent 60% of his time working on the Company's business.

(3)   Matching contribution by the Company to the 401(k) Savings Plan and payments by the Company for Group Term Life.

</TABLE>

<PAGE>


         The  following  table sets forth  information  for the named  executive
officers  regarding the unexercised  options held at the end of 1999. No options
were exercised by the named executive officers in 1999.

<TABLE>
<CAPTION>


                   Aggregated December 31, 1999 Option Values

                                Number of Unexercised         Value of Unexercised
                                     Options at               In-the-Money Options at

                                December 31, 1999(#)          December 31, 1999($)(1)
                                Exercisable/Unexercisable    Exercisable/Unexercisable
                                -------------------------    -------------------------
<S>                             <C>            <C>             <C>            <C>
Lawrence M. Gordon              165,653        343,352        $8,282         $17,167
Samuel H. Ronel, Ph.D.          103,469        208,796         5,173          10,439
Stanley G. Schutzbank, Ph.D.    153,535        331,340         7,676          16,567
James Knill, M.D.                19,634         44,141           981           2,207
Mei-June Liao, Ph.D.             30,363         68,752         1,518           3,437

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

(1)      Calculated based on the closing price of the Common Stock as reported on the OTC Bulletin Board on December 31, 1999.

</TABLE>

                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Agreements with GP Strategies

         Transfer  Agreement.  As of January 1, 1981, GP Strategies entered into
an agreement (the "Transfer  Agreement")  with the Company  pursuant to which GP
Strategies  (i) licensed to the Company in perpetuity  all of its right,  title,
and interest in and to certain intellectual  property and technology rights (the
"Intangible  Assets") relating to its programs in human leukocyte interferon and
recombinant DNA and hybridoma  technology,  and (ii)  transferred to the Company
its rights  under  certain  consulting,  supply,  and research  agreements  (the
"Agreements").  In  consideration  of the license and transfer of the Intangible
Assets and the Agreements, the Transfer Agreement provides that the Company will
pay to GP Strategies a royalty of $1,000,000. Such amount is payable if and when
the Company  generates net income before income taxes,  and is limited to 25% of
such net income before taxes per year until the amount is paid in full. To date,
the Company has not  generated  income  before taxes and  therefore has not paid
royalties to GP Strategies.

         Other Transactions. In an agreement dated March 25, 1999, GP Strategies
agreed to lend the  Company  $500,000  at the rate of  $250,000 a month (the "GP
Strategies  Debt").  In return,  the Company agreed to grant GP Strategies (i) a
first mortgage on the Company's real estate,  (ii) a two-year option to purchase
the  Company's  real  estate,  provided  that the  Company  has  terminated  its
operations and the Red Cross Debt has been repaid, and (iii) a two-year right of
first  refusal  in the event the  Company  desires to sell its real  estate.  In
addition,  the Company  agreed to issue GP Strategies  500,000  shares of Common
Stock and  five-year  options to purchase  500,000  shares of Common  Stock at a
price of $1 per share.  Pursuant to the agreement,  the Company issued a note to
GP  Strategies  representing  the GP  Strategies  Debt,  which  note  was due on
September 30, 1999 (but extended to June 30, 2001) and bears  interest,  payable
at  maturity,  at the  rate  of 6% per  annum.  In  addition,  the  Company  has
negotiated a  subordination  agreement  with the Red Cross pursuant to which the
Red Cross has agreed that its lien on the Company's  real estate is  subordinate
to GP Strategies' lien. On March 27, 2000, the Company and GP Strategies entered
into an  agreement  pursuant to which (i) the GP  Strategies  Debt was  extended
until June 30, 2001, and (ii) the Management  Agreement  between the Company and
GP Strategies was terminated and all  intercompany  accounts between the Company
and GP Strategies  (other than the GP Strategies Debt) in the amount of $130,000
were discharged and eliminated.  The agreement also provides that (i) commencing
on May 1,  2001 and  ending  on June 30,  2001,  on any day ISI may  require  GP
Strategies  to exercise the GP Warrant and sell the  underlying  shares,  if the
market  price of ISI  Common  Stock  exceeds  $1.00  per share on each of the 10
trading days prior to any such day,  and (ii) any proceeds  from the sale of the
shares  issuable  upon  exercise  of the GP Warrant  in excess of the  aggregate
amount paid by GP Strategies to purchase such shares,  would be deemed to reduce
the then outstanding  amount of principal and interest of the GP Strategies Debt
until such amount is reduced to zero.

Employment Agreements

         As of October 1, 1997,  Lawrence M. Gordon  entered into an  employment
agreement with the Company pursuant to which Mr. Gordon is employed as the Chief
Executive  Officer of the Company until December 31, 2001. On December 31, 1999,
and on each  December  31 of each  year  thereafter,  the  employment  period is
automatically  extended for one additional  year unless,  not later than June 30
immediately  preceding any such December 31, either party  delivers to the other
written notice that the employment period is not further extended.

         Commencing  January  1,  1997,  Mr.  Gordon's  base  annual  salary  is
$250,000,  subject to annual  increases of 6%. The Company's  Board of Directors
may determine Mr.  Gordon's bonus for each year, and whether to grant Mr. Gordon
additional  options,  based  upon the  Company's  revenues,  profits  or losses,
financing activities, progress in clinical trials, and such other factors deemed
relevant by the Board.

         As of July 1, 2000,  Stanley G.  Schutzbank and Samuel H. Ronel entered
into employment  agreements with the Company pursuant to which Dr. Schutzbank is
employed as  President  of the Company and Dr.  Ronel is employed as Chairman of
the Board of the Company  until  December 31, 2003. On December 31, 2001 for Dr.
Schutzbank and December 31, 2002 for Dr. Ronel,  and on each December 31 of each
year  thereafter,  the  employment  period  is  automatically  extended  for one
additional  year unless,  not later than June 30 immediately  preceding any such
December  31,  either  party  delivers  to the  other  written  notice  that the
employment period is not further extended.

         Dr.  Schutzbank's  base annual  salary is  $250,000,  subject to annual
increases of 6%, and Dr. Ronel's base annual salary is $175,000, subject to such
increases  as  may  be  granted  by the  Board.  The  Board  may  determine  Dr.
Schutzbank's  and Dr.  Ronel's  bonus for each year,  and  whether to grant them
stock options, based upon the Company's revenues,  profits or losses,  financing
activities,  progress in clinical trials, and such other factors deemed relevant
by the Board.

         The Company may terminate each of the employment  agreements for Cause,
which is defined as (i) the willful  and  continued  failure by the  employee to
substantially  perform his duties or obligations or (ii) the willful engaging by
the  employee in  misconduct  which is  materially  monetarily  injurious to the
Company.  If an  employment  agreement is terminated  for Cause,  the Company is
required to pay the employee his full salary through the termination date.

         Each of the employees can terminate his  employment  agreement for Good
Reason,  which is defined  as (i) a change in  control of the  Company or (ii) a
failure by the Company to comply with any material  provision of the  employment
agreement  which has not been cured within ten days after  notice.  A "change in
control"  of the  Company is defined as (i) a change in control of a nature that
would be required  to be reported in response to Item 1(a) of Current  Report on
Form 8-K pursuant to Section 13 or 15(d) of the Securities  Exchange Act of 1934
(the "Exchange Act"),  (ii) any "person" (as such term is used in Sections 13(d)
and 14(d) of the Exchange Act) is or becomes the "beneficial  owner" (as defined
in Rule 13d-3 under the Exchange Act), directly or indirectly,  of securities of
the  Company  representing  20% or  more of the  combined  voting  power  of the
Company's then outstanding securities, or (iii) at any time individuals who were
either  nominated  for  election  or  elected by the Board of  Directors  of the
Company cease for any reason to constitute at least a majority of the Board.

         If the Company  wrongfully  terminates an  employment  agreement or the
employee  terminates  his  employment  agreement  for Good Reason,  then (i) the
Company is required to pay the employee his full salary through the  termination
date;  (ii) the Company is required to pay as  severance  pay to the employee an
amount  equal to (a) his average  annual  cash  compensation  received  from the
Company  during  the  three  full  calendar  years  immediately   preceding  the
termination  date (or, if the  termination  date is prior to December  31, 2002,
during the full calendar years  commencing with calendar year 2000 preceding the
termination  date),  multiplied  by (b) the  greater  of (I) the number of years
(including  partial  years)  that would have been  remaining  in the  employment
period if the employment agreement had not so terminated and (II) three (one and
one-half in the case of Dr.  Ronel),  such payment to be made (c) if termination
is based on a change of control of the  Company,  in a lump sum on or before the
fifth day following the termination date or (d) if termination  results from any
other cause, in substantially  equal semimonthly  installments  payable over the
number of years (including  partial years) that would have been remaining in the
employment period if the employment  agreement had not so terminated;  (iii) all
options to purchase the Company's common stock granted to the employee under the
Company's option plan or otherwise immediately become fully vested and terminate
on such date as they would have  terminated if the employee's  employment by the
Company had not  terminated  and, if the  employee's  termination  is based on a
change of control of the Company and the employee elects to surrender any or all
of such  options to the  Company,  the Company is required to pay the employee a
lump sum cash  payment  equal to the excess of (a) the fair market  value on the
termination  date  of the  securities  issuable  upon  exercise  of the  options
surrendered  over (b) the aggregate  exercise price of the options  surrendered;
and (iv) if termination of the  employment  agreement  arises out of a breach by
the  Company,  the  Company is  required  to pay all other  damages to which the
employee may be entitled as a result of such breach. If the employment agreement
is  terminated  for any reason  other than  Cause,  the  Company is  required to
maintain in full force and effect, for a number of years equal to the greater of
(i) the number of years (including partial years) that would have been remaining
in the employment  period if the employment  agreement had not so terminated and
(ii) three (one and one-half in the case of Dr.  Ronel),  all  employee  benefit
plans and programs in which the employee was entitled to participate immediately
prior to the termination date.

                             PRINCIPAL STOCKHOLDERS

         The  following  table sets  forth the number of shares of Common  Stock
beneficially  owned as of October 31, 2000, by each person who is known to us to
own beneficially more than 5% of our outstanding Common Stock.

Name and Address                              Number of Shares        Percent of
of Beneficial Owner                           Beneficially Owned           Class
-------------------                           ------------------     -----------
Harbor Trust                                  2,727,274(1)(2)         4.8%(1)(2)
418 Avenue I
Brooklyn, NY  11230


(1)  Includes  1,363,637  shares  that  may be  acquired  upon the  exercise  of
     warrants, exercisable until April 2005, at a price of $1.50 per share.

(2)  Does not include an option to purchase  246,212 Units (each Unit consisting
     of a share of  Common  Stock and a warrant  to  purchase  a share of Common
     Stock for $1.50)  exercisable  commencing  on April 17,  2001 at a price of
     $.66 per unit.

         The  following  table sets forth,  as of October 31,  2000,  beneficial
ownership of shares of Common Stock of the Company by each director, each of the
named executive officers and all directors and executive officers as a group.

<TABLE>
<CAPTION>

                                                                       Of Total Number
                                                                       of Shares
                                                                       Beneficially

                                    Total Number      Percent of          Owned
                                      of Shares         Common         Shares which

                                    Beneficially        Stock        May be Acquired
Name                                   Owned           Owned(1)       Within 60 Days
----                                 ----------       ----------     -----------------
<S>                                    <C>              <C>               <C>
Samuel H. Ronel, Ph.D.                 313,765            2%              176,617
Lawrence M. Gordon                     509,905            3%              287,329
Stanley G. Schutzbank, Ph.D.           484,875            3%              269,205
Sheldon L. Glashow                      22,250            *                19,350
Directors and Executive Officers     1,608,003            9%              896,540
  as a Group (8 persons)
 -------------

* The number of shares owned is less than one percent of the outstanding  shares
of Common Stock.

(1)   The percentage of class calculation assumes for each beneficial owner that
      all of the options or  warrants  are  exercised  in full only by the named
      beneficial  owner and that no other  options or warrants  are deemed to be
      exercised by any other stockholders.
</TABLE>

                          DESCRIPTION OF CAPITAL STOCK

General

         The Company is authorized to issue  55,000,000  shares of Common Stock.
As of October 31, 2000,  17,949,897 shares of Common Stock were outstanding.  In
addition,  17,098,326  shares of Common Stock were  reserved  for issuance  upon
exercise of outstanding warrants and options.

Common Stock

         Each outstanding  share of Common Stock entitles the holder to one vote
on all matters requiring a vote of stockholders. Since the Common Stock does not
have cumulative voting rights, the holders of shares having more than 50% of the
voting  power,  if they  choose to do so,  may elect  all the  directors  of the
Company and the holders of the  remaining  shares would not be able to elect any
directors. See Principal Stockholders."

         Subject to the rights of holders of any series of preferred  stock that
may be issued in the  future,  the holders of the Common  Stock are  entitled to
receive  dividends  when,  as and if declared by the Board of  Directors  out of
funds  legally  available  therefor.  See  "Price  Range  of  Common  Stock  and
Dividends."  In the  event of a  voluntary  or  involuntary  liquidation  of the
Company,  all stockholders are entitled to a pro rata distribution of the assets
of the Company  remaining  after payment of claims of creditors and  liquidation
preferences of any preferred  stock.  Holders of Common Stock have no conversion
or preemptive rights. All outstanding shares of Common Stock are, and the shares
of Common Stock offered  hereby by the Company when issued and paid for will be,
fully paid and nonassessable.

         The transfer agent for the Common Stock is Computershare Investor
Services, L.L.C., 2 North LaSalle Street, Chicago, Illinois 60602.

Preferred Stock

         The Company is authorized to issue 5,000,000 shares of Preferred Stock,
none of which is  outstanding,  the  terms of which may be fixed by the Board of
Directors.  It is not possible to state the actual effect of any issuance of one
or more  series of  preferred  stock upon the rights of holders of Common  Stock
until the Board of Directors of the Company  determines the respective rights of
the holders of one or more series of the preferred  stock.  Such effects  might,
however,  include:  (a) reduction of the amount of funds otherwise available for
payment of cash dividends on Common Stock;  (b)  restrictions  on the payment of
cash  dividends on Common Stock;  (c) dilution of the voting power of the Common
Stock, to the extent that any series of issued preferred stock has voting rights
or is  convertible  into Common  Stock;  and (d) the holders of Common Stock not
being  entitled to share in the assets of the  Company  upon  liquidation  until
satisfaction of liquidation  preferences,  if any, in respect of any outstanding
Preferred Stock.

                              SELLING STOCKHOLDERS

         This  prospectus  relates to the  offering by the selling  stockholders
named in this prospectus of up to 27,899,820  shares of common stock. All of the
selling  stockholders  have  acquired  the  shares  of common  stock in  private
placements and may acquire  additional  shares of common stock upon the exercise
of warrants issued in the private placements.

The following table sets forth important information with respect to the selling
stockholders as of October 31, 2000, as follows:

-        the name and position or other material relationship (if any) within
         the past three years of the selling stockholders with us;

-        the number of shares of common stock  beneficially  owned by the
         selling stockholders (including shares issuable upon exercise of
         warrants  exercisable  within 60 days of October 31, 2000) prior
         to this offering;

-        the number of shares of common stock being offered through this
         prospectus; and

-        the  number  and  percentage  of shares  of  common  stock to be
         beneficially owned by the selling stockholders after the sale of
         the  shares  of  common   stock  being   offered   through  this
         prospectus.

The selling  stockholders  do not have to sell all of the shares of common stock
that they own.

<TABLE>
<CAPTION>


                                 Number of Shares         Number of Shares                       Shares Beneficially
                                 Beneficially             Issuable Upon                          Owned After the Offering
                                 Owned Prior to           Exercise of         Number of Shares   ------------------------
Selling Stockholder              the Offering             Warrants            Offered Hereby      Number      Percentage
-------------------              ------------             ---------           --------------      ------      ----------
<S>                                <C>                      <C>                <C>                  <C>           <C>
Anfel Trading Ltd.                         757,576         378,788(1)          757,576(3)            0             0

Marc L. Bailin                              75,758          37,879(1)           75,758(3)            0             0

Balmore S.A.                             1,515,152         757,576(1)        1,515,152(3)            0             0

Arnaldo Barros                             454,546         227,273(1)          454,546(3)            0             0

B&B Trading Retirement Plan                 75,758          37,879(1)           75,758(3)            0             0

Ismelia Costa Belmont                      120,000          60,000(1)          120,000(3)            0             0

Ethan Benovitz                              75,758          37,879(1)           75,758(3)            0             0

Daniel Berger                              151,516          75,758(1)          151,516(3)            0             0

John W. Blaha                               37,880          18,940(1)           37,880(3)            0             0

Martin Blech                                90,910          45,455(1)           90,910(3)            0             0

Bruce Bridges                               30,000          15,000(1)           30,000(3)            0             0

Celeste Trust Reg.                       1,515,152         757,576(1)        1,515,152(3)            0             0

Central Yeshiva Beth Joseph                237,123         146,971(1)          237,123(3)            0             0

Clarex Limited                             300,000         150,000(1)          300,000(3)            0             0

Congregation Ohel Torah                     75,758          37,879(1)           75,758(3)            0             0

Robert Degirmenci                           75,758          37,879(1)           75,758(3)            0             0

Robert H. Donehew                           30,304          15,152(1)           30,304(3)            0             0

Donehew Fund Limited
Partnership                                272,728         136,364(1)          272,728(3)            0             0

Stella Eros Trust                          400,000         200,000(1)          400,000(3)            0             0

Richard and Kenneth Etra                    37,880          18,940(1)           37,880(3)            0             0

Steven Etra                                189,394          94,697(1)          189,394(3)            0             0

Steven Gluckstein, IRA                      50,000          25,000(1)           50,000(3)            0             0

Ari S. Goldman                              96,000          48,000(1)           96,000(3)            0             0

Martin Goldman                              80,000          40,000(1)           80,000(3)            0             0

GP Strategies Corporation                  794,800         500,000(2)          794,800(3)            0             0

Frank V. Grace                              75,758          37,879(1)           75,758(3)            0             0

HAA, Inc.                                  454,546         227,273(1)          454,546(3)            0             0

Mark and Amy Halper                        200,000         100,000(1)          200,000(3)            0             0

Harbor Trust                             2,727,274       1,363,637(1)     2,727,274(3)(5)            0             0

Harbor Trust                                     0                  0          492,424(5)            0             0

Harnof Investments Limited                 303,032         151,516(1)          303,032(3)            0             0

John Heilshorn                             113,638          56,819(1)          113,638(3)            0             0

Charlotte Horowitz                         121,214          60,607(1)          121,214(3)            0             0

Benjamin J. Jesselson 8/21/74
Trust                                      757,576         378,788(1)          757,576(3)            0             0

Michael G. Jesselson 12/18/80
Trust                                    1,515,152         757,576(1)        1,515,152(3)            0             0

Richard Kandel                             151,516          75,758(1)          151,516(3)            0             0

Scott J. Koppelman                         200,000         100,000(1)          200,000(3)            0             0

KSH Strategic Investment Fund
I, LP                                      757,576         378,788(1)          757,576(3)            0             0

Alan and Penny Layton                       37,880          18,940(1)           37,880(3)            0             0

George Lichtenstein                        170,455          85,227(1)          170,455(3)            0             0

Lightning Ltd.                             151,516          75,758(1)          151,516(3)            0             0

Keith Lippert                               75,758          37,879(1)           75,758(3)            0             0

Low Family Trust                           151,516          75,758(1)          151,516(3)            0             0

Robert A. Mackie                           340,000         170,000(1)          340,000(3)            0             0

Magic Consulting Corp.                     200,000         100,000(1)          200,000(3)            0             0

Markham Holdings Limited                   303,032         151,516(1)          303,032(3)            0             0

Martin Marlow                               75,758          37,879(1)           75,758(3)            0             0

Abraham Masliansky                         400,000         200,000(1)          400,000(3)            0             0

Maria Molinsky                             200,000         100,000(1)          200,000(3)            0             0

Sean Molloy                                 30,000          15,000(1)           30,000(3)            0             0

New Millennium Biotech                           0                  0          492,424(5)            0             0

New Millennium Biotech                     303,032         151,516(1)          303,032(3)            0             0

Avroham Moshel                             200,000         100,000(1)          200,000(3)            0             0

Jules Nordlicht                            303,032         151,516(1)          303,032(3)            0             0

Mark Nordlicht                           1,212,122         606,061(1)        1,212,122(3)            0             0

Steven Oliveira                            200,000         100,000(1)          200,000(3)            0             0

One Route 340 Corp.                         75,758          37,879(1)           75,758(3)            0             0

Ruthy Parnes                               151,516          75,758(1)          151,516(3)            0             0

Lawrence L. Pickens                         37,880          18,940(1)           37,880(3)            0             0

Mary Ann Pickens                            75,758          37,879(1)           75,758(3)            0             0

Richard S. Post                             37,880          18,940(1)           37,880(3)            0             0

Earl H. Powers                              75,758          37,879(1)           75,758(3)            0             0

Dov Rauchwerger                            181,820          90,910(1)          181,820(3)            0             0

RBB Bank Aktiengesellschaft              1,760,000         880,000(1)        1,760,000(3)            0             0

Thomas Redington                           136,364          68,182(1)          136,364(3)            0             0

David Rosenberg                            400,000         200,000(1)          400,000(3)            0             0

Daniel Saks                                 75,758          37,879(1)           75,758(3)            0             0

Marvin Schick                              151,516          75,758(1)          151,516(3)            0             0

Frank J. Schultheis                        151,516          75,758(1)          151,516(3)            0             0

Elliot S. Schwartz and Michael
Ettinger - Tenants in Common                75,758          37,879(1)           75,758(3)            0             0

Seaview Global Fund, LP                     80,000          40,000(1)           80,000(3)            0             0

Abraham Shapiro                             75,758          37,879(1)           75,758(3)            0             0

Charles Silberstein                         30,304          15,152(1)           30,304(3)            0             0

Gary Stein                                  60,608          30,304(1)           60,608(3)            0             0

Richard S. Thompson                         75,758          37,879(1)           75,758(3)            0             0

Michele Faskowitz Treister                  30,304          15,152(1)           30,304(3)            0             0

Nelson M. Tuchman                           75,758          37,879(1)           75,758(3)            0             0

Israel Wallach                              30,304          15,152(1)           30,304(3)            0             0

Teddy Wallach                               60,608          30,304(1)           60,608(3)            0             0

Zvi Weinreb                                151,516          75,758(1)          151,516(3)            0             0

Stephen Weiss                               30,304          15,152(1)           30,304(3)            0             0

Yeshiva Gimel Daled Inc.                   303,032         151,516(1)          303,032(3)            0             0

Yeshiva Madreigas HaAdam                   100,000          50,000(1)          100,000(3)            0             0

Jay Zises, IRA                             303,032         151,516(1)          303,032(3)            0             0

GKN Securities                                   0                  0           88,380(4)            0             0

Jay Goldman                                      0                  0           60,700(4)            0             0

Stuart Horowitz                                  0                  0           20,234(4)            0             0

Diane Pilatsky                                   0                  0            1,650(4)            0             0

Robert Gladstone                                 0                  0            5,398(4)            0             0

David Nussbaum                                   0                  0            5,398(4)            0             0

Roger Gladstone                                  0                  0            5,398(4)            0             0

Graubard, Mollen & Miller                        0                  0           20,796(4)            0             0

Catalyst Venture Capital LLC                     0                  0          280,000(4)            0             0

Albert Poliak                                    0                  0           24,250(4)            0             0

Robert Setteducati                               0                  0           24,250(4)            0             0

YMT, Inc.                                        0                  0          113,638(4)            0             0

Libra Finance S.A.                               0                  0          454,546(4)            0             0

Central Yeshiva Beth Joseph                      0                  0          360,228(4)            0             0

Daniel J. Moran                                  0                  0           56,820(4)            0             0

KSH Investment Group, Inc.                       0                  0          113,638(4)            0             0

Steven Oliveira                                  0                  0          150,000(4)            0             0

Fred Sager                                       0                  0           51,764(4)            0             0

Stephen J. Perrone                               0                  0           22,182(4)            0             0

Gabriel M. Cerrone                               0                  0           90,000(4)            0             0

American Red Cross                      800,000(6)                  0          800,000(6)            0             0

Terry Plasse, MD                         30,000(7)                  0           30,000(7)            0             0

Sera-Tec Biologicals Limited

Partnership                              70,000(8)                  0           70,000(8)            0             0

(1)      The warrants are exercisable at a price of $1.50 per share of common stock until April, 2005.

(2)      The warrants are exercisable at a price of $1.00 per share of common stock until March, 2004.
(3)  Consists  of  shares  of  common  stock  currently  owned  by  the  selling
     stockholders and offered hereby, as well as shares of common stock issuable
     to such selling  stockholders upon exercise of warrants  currently held and
     offered hereby by such selling stockholders.

(4)  Represents  options to purchase  Units,  each Unit consisting of a share of
     Common Stock and a warrant to purchase an additional  share of Common Stock
     at a price of $1.50, exercisable at a price of $.66 per Unit, commencing on
     April 17, 2001. The Units were issued as compensation for services rendered
     to the Company in the private placement.

(5)  Does not include options to purchase an additional 246,212 Units, each Unit
     consisting  of a share  of  Common  Stock  and a  warrant  to  purchase  an
     additional  share of  Common  Stock at a price of $1.50,  exercisable  at a
     price of $.66 per Unit,  commencing  on April 17, 2001.  The warrants  were
     issued to the selling stockholder for acting as a lead investor.

(6)      Represents shares issued as payment for indebtedness owed to the selling stockholder.

(7)      Represents shares issued as payment for indebtedness owed to the selling stockholder.  Dr. Plasse rendered consulting
     services to the Company during 1998 and 1999.

(8)      Represents shares issued as payment for indebtedness owed to the selling stockholder.

</TABLE>

                              PLAN OF DISTRIBUTION

         The common stock being offered by the selling stockholders will be sold
in one or more  transactions  (which may involve block  transactions) on the OTC
Bulletin  Board or on another  market on which the common stock may from time to
time be trading, in  privately-negotiated  transactions,  through the writing of
options on the common stock, short sales, or any combination  thereof.  The sale
price to the public may be the market  price  prevailing  at the time of sale, a
price related to the prevailing  market price, or any other price as the selling
stockholders  determine from time to time. The selling  stockholders  shall have
the sole and absolute  discretion  not to accept any purchase  offer or make any
sale of common stock if they deem the purchase price to be unsatisfactory at any
particular time.

         The selling  stockholders  may also sell the common  stock  directly to
market makers acting as principals  and/or  broker-dealers  acting as agents for
themselves  or  their  customers.  Brokers  acting  as  agents  for the  selling
stockholders  will  receive  usual  and  customary   commissions  for  brokerage
transactions, and market makers and block purchasers purchasing the common stock
will do so for their own account and at their own risk.  It is possible that the
selling  stockholders  will  attempt  to sell  shares of  common  stock in block
transactions to market makers or other purchasers at a price per share which may
be below the then market price. In addition,  the selling stockholders (or their
successors in interest) may enter into hedging  transactions with broker-dealers
who may  engage in short  sales of common  stock in the  course of  hedging  the
positions they assume with a selling stockholder. There can be no assurance that
all or any of the common stock offered hereby will be issued to, or sold by, the
selling stockholders.

         The selling  stockholders  and any other persons  participating  in the
sale  or  distribution  of the  common  stock  will  be  subject  to  applicable
provisions of the Exchange Act and the rules and regulations  thereunder.  These
rules may limit the timing of purchases  and sales of any of the common stock by
the selling  stockholders or any other person participating in the distribution.
Furthermore, under Regulation M, persons engaged in a distribution of securities
are prohibited  from  simultaneously  engaging in market making and other market
activities  with  respect to the  common  stock for a  specified  period of time
before the distribution  begins. These restrictions may reduce the marketability
of the common stock.

         We  have  agreed  to  indemnify   the  selling   stockholders   against
potentially significant liabilities,  including liabilities under the Securities
Act.

                                  LEGAL MATTERS

         Certain  legal  matters  with respect to the shares of common stock and
the shares  issuable  upon  exercise of the  warrants  offered  hereby have been
passed upon for the  Company by Duane,  Morris & Heckscher  LLP,  New York,  New
York.

                                     EXPERTS

         The consolidated financial statements of the Company as of December 31,
1999 and 1998, and for each of the years in the three-year period ended December
31, 1999 have been included herein and in the registration statement in reliance
upon the report of KPMG LLP, independent certified public accountants, appearing
elsewhere  herein,  and upon the authority of said firm as experts in accounting
and auditing.

         The  report  of KPMG LLP  covering  the  December  31,  1999  financial
statements  contains an  explanatory  paragraph  that states that our  recurring
losses from operations and accumulated deficit raise substantial doubt about our
ability to continue as a going concern. The consolidated financial statements do
not  include  any  adjustments  that  might  result  from  the  outcome  of that
uncertainty.

                       WHERE YOU CAN FIND MORE INFORMATION

         We file annual,  quarterly and special  reports,  proxy  statements and
other information with the SEC. Our SEC filings are available to the public over
the Internet at the SEC's web site at http://www.sec.gov.  You may also read and
copy any document we file at the SEC's  public  reference  rooms in  Washington,
D.C.,  New  York,  New  York  and  Chicago,  Illinois.  Please  call  the SEC at
1-800-732-0330 for further information on the public reference rooms.

         We have  filed  a  registration  statement  on Form  S-1  with  the SEC
relating to the common stock offered by this  prospectus.  This  prospectus does
not contain all of the information set forth in the  registration  statement and
the  exhibits  for the  registration  statement.  Statements  contained  in this
prospectus as to the content of any contract or other  document  referred to are
not  necessarily  complete and in each  instance we refer you to the contract or
other  document  filed as an exhibit to the  registration  statement,  each such
statement being qualified in all respects by such reference.

         For  further  information  with  respect  to ISI and the  common  stock
offered  by  this  prospectus,  we  refer  you  to the  registration  statement,
exhibits, and schedules,  which may be inspected by anyone without charge at the
public reference  facilities maintain by the SEC at the above locations.  Copies
of all or any part of the registration statement may be obtained from the Public
Reference Section of the SEC at 450 Fifth Street, N.W., Washington,  D.C. 20549,
upon  payment  of the  prescribed  fees.  The  registration  statement  is  also
available   through   the   SEC's   Web   site   at   the   following   address:
http://www.sec.gov.  Our common stock is quoted on the OTC Bulletin  Board under
the symbol "IFSC."


<PAGE>

<TABLE>
<CAPTION>



                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Unaudited Consolidated Financial Statements                                                                     Page
<S>                                                                                                             <C>

Consolidated Condensed Balance Sheets - June 30, 2000 (Unaudited) and
            December 31, 1999...................................................................................F-2

Consolidated Condensed Statements of Operations - Three Months and Six Months
            Ended June 30, 2000 and 1999 (Unaudited)............................................................F-3

Consolidated Condensed Statements of Changes in Stockholders' Equity - Six Months
            Ended June 30, 2000 (Unaudited).....................................................................F-5

Consolidated Condensed Statements of Cash Flows - Six Months Ended June 30, 2000
            and 1999 (Unaudited)................................................................................F-6

Notes to Consolidated Condensed Financial Statements (Unaudited)................................................F-7


Audited Consolidated Financial Statements

Independent Auditors' Report...................................................................................F-12

Consolidated Balance Sheets - December 31, 1999 and 1998.......................................................F-13

Consolidated Statements of Operations - Years Ended December 31, 1999, 1998 and 1997...........................F-14

Consolidated Statements of Changes in Stockholders' Equity - Years Ended December 31,
         1999, 1998, and 1997..................................................................................F-14

Consolidated Statements of Cash Flows - Years Ended December 31, 1999, 1998 and 1997...........................F-16

Notes to Consolidated Financial Statements.....................................................................F-17

</TABLE>

<PAGE>


                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                      CONSOLIDATED CONDENSED BALANCE SHEETS

                                   (Unaudited)

                                                 June 30,         December 31,
                                                   2000              1999
                                               (Unaudited)
ASSETS                                        -------------------------------
Current assets

  Cash and cash equivalents                   $  3,391,236        $ 2,273,242
  Accounts and other receivables                   128,097             35,561
  Inventories, net of reserves
    of $5,945,842 and $6,225,185,
    respectively                                   735,203            766,000
  Prepaid expenses and other
    current assets                                  28,582             27,018
                                             -------------      -------------
Total current assets                             4,283,118          3,101,821
                                             -------------      -------------
Property, plant and equipment,
  at cost                                       12,759,273         12,759,273
Less accumulated depreciation                  (10,076,311)        (9,834,558)
                                             -------------      -------------
                                                 2,682,962          2,924,715
                                             -------------      -------------
Patent costs, net of accumulated
  amortization                                     204,788            219,822
Other assets                                        10,100             10,100
                                             -------------      -------------
Total assets                                 $   7,180,968      $   6,256,458
                                             =============      =============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities

  Accounts payable and accrued expenses      $   2,867,722      $   4,915,466
  Note payable and amount due
   GP Strategies                                   536,250            283,637
                                             -------------      -------------
Total current liabilities                        3,403,972          5,199,103
                                             -------------      -------------
Note payable to GP Strategies                                         500,000
                                             -------------      -------------
Commitments and contingencies

Stockholders' equity

Preferred stock, par value $.01 per share;
 authorized-5,000,000 shares; none issued
 and outstanding
Common stock, par value $.01 per share;
 authorized-55,000,000 shares; issued
 and outstanding-12,482,393 and
 5,327,473 shares, respectively                    124,824            53,275
Capital in excess of par value                 134,097,733       129,397,259
Accumulated deficit                           (130,445,561)     (128,812,179)
Settlement shares                                                    (81,000)
                                             -------------      ------------
Total stockholders' equity                       3,776,996           557,355
                                             -------------      ------------
Total liabilities and stockholders'
  equity                                     $   7,180,968     $   6,256,458
                                             =============     =============


The  accompanying  notes are an integral  part of these  consolidated  condensed
financial statements.


<PAGE>


                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

                                   (Unaudited)

                                                      Three Months Ended
                                                           June 30,
                                                  -----------------------------
                                                       2000           1999
                                                                  (as restated)
                                                  -------------   ------------
Revenues

  Alferon N Injection                              $    157,922   $    526,389
                                                  -------------  -------------
Total revenues                                          157,922        526,389
                                                  -------------  -------------
Costs and expenses
Cost of goods sold and idle

  production costs                                      425,177        765,408
Reversal of reserve for excess inventory                              (273,789)
Research and development (net of $456,998
  for settlements on various liabilities
  during the three months ended June 30, 2000)           34,000        696,497
General and administrative                              518,103        504,792
                                                  -------------  -------------
Total costs and expenses                                977,280      1,692,908
                                                  -------------  -------------
Loss from operations                                  (819,358)     (1,166,519)

 Interest expense and financing costs                       779        249,360
                                                  -------------  -------------
Net loss                                          $   (820,137)    $(1,415,879)
                                                  =============  =============

Basic and diluted loss per share                  $       (.09)   $       (.27)
                                                  =============  =============
Weighted average number of
 shares outstanding                                   9,227,925      5,179,034
                                                  =============  =============



The  accompanying  notes are an integral  part of these  consolidated  condensed
financial statements.


<PAGE>



                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

                                   (Unaudited)

                                Six Months Ended

                                    June 30,

                                                  -----------------------------
                                                       2000           1999
                                                                  (as restated)
                                                  -------------   -------------
Revenues

  Alferon N Injection                              $    321,072   $    985,910
  Research products                                                        277
                                                  -------------  -------------
Total revenues                                          321,072        986,187
                                                  -------------  -------------
Costs and expenses
Cost of goods sold and idle

  production costs                                      655,330      2,223,840
Reversal of reserve for excess inventory               (135,271)      (582,650)
Research and development (net of $456,998
  for settlements on various liabilities
  during the six months ended June 30, 2000)            457,819      1,942,989
General and administrative                              966,177      1,285,023
                                                  -------------  -------------
Total costs and expenses                              1,944,055      4,869,202
                                                  -------------  -------------
Loss from operations                                 (1,622,983)    (3,883,015)

 Interest expense and financing costs                    10,399        244,623
                                                  -------------  -------------
Net loss                                           $ (1,633,382)   $(4,127,638)
                                                  =============  =============

Basic and diluted loss per share                   $       (.22)  $       (.84)
                                                  =============  =============
Weighted average number of
 shares outstanding                                   7,566,877      4,922,447
                                                  =============   =============



The  accompanying  notes are an integral  part of these  consolidated  condensed
financial statements.


<PAGE>

<TABLE>
<CAPTION>

                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

       CONSOLIDATED CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
                         SIX MONTHS ENDED June 30, 2000

                                   (Unaudited)

                                             Capital                                           Total
                       Common Stock         in excess       Accummulated     Settlement     stockholders'
                     Shares      Amount    of par value      deficit          shares          equity
                     ------------------    ------------    --------------    ----------     -------------
<S>                     <C>     <C>             <C>             <C>              <C>            <C>
Balance at
 Dec. 31,
 1999              5,327,473   $ 53,275    $129,397,259  $(128,812,179)   $  (81,000)    $   557,355

Net proceeds
 from sale of
 common stock      7,088,648     70,886       4,507,614                                    4,578,500

Common stock
 issued as
 compensation         20,000        200           23,550                                       23,750

Common stock
 issued under
 Company 401(k)
 Plan                 46,272        463           39,424                                       39,887

Forgiveness of
 amount due GP
 Strategies                                      129,886                                      129,886

Settlement shares
 sold                                                                          368,341        368,341

Market value
 adjustment                                                                   (287,341)      (287,341)

Net loss                                                      (1,633,382)                  (1,633,382)
                 --------------------------------------------------------------------------------------
Balance at
 June 30,

 2000             12,482,393   $124,824     $134,097,733   $(130,445,561)   $   ---        $3,776,996


The  accompanying  notes are an integral  part of these  consolidated  condensed
financial statements.

</TABLE>

<PAGE>

<TABLE>
<CAPTION>



                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS

                                   (Unaudited)

                                                             Six Months Ended
                                                                  June 30,
                                                         --------------------------
                                                           2000         1999
                                                                    (as restated)
                                                         ------------  ------------
<S>                                                             <C>        <C>
Cash flows from operations:

  Net loss                                               $(1,633,382)  $(4,127,638)
  Adjustments to reconcile net loss to net
   cash used for operating activities:
    Depreciation and amortization                            256,787       373,654
    Amortization of deferred financing costs                               250,000
    Gain on settlements of research-related liabilities     (456,998)
    Compensation and
     benefits paid with common stock                          63,637        68,979
    Reversal of reserve for
     excess inventory                                       (135,271)     (582,650)
    Market value adjustment                                 (287,341)      587,261
    Loss on sale of other assets                                            51,392
    Change in operating assets and liabilities:
     Inventories                                             166,068       520,434
     Amount due to GP Strategies                            (117,501)       74,264
     Accounts and other receivables                          (92,536)      480,810
     Prepaid expenses and other current
      assets                                                  (1,564)      (78,319)
     Accounts payable and accrued expenses                (1,222,405)      878,161
                                                         ------------  ------------
    Net cash used for operations                          (3,460,506)   (1,503,652)
                                                         ------------  ------------
Cash flows from investing activities:

  Proceeds from sale of other assets                                        38,658
                                                         ------------  ------------
  Net cash provided by                                                      38,658
    investing activities                                 ------------  ------------

Cash flows from financing activities:

  Net proceeds from sale of common stock                   4,578,500
  Proceeds from note payable to
  GP Strategies                                                            500,000
                                                         ------------  ------------
Net cash provided by financing activities                  4,578,500       500,000
                                                         ------------  ------------
Net increase (decrease) in cash and cash equivalents       1,117,994      (964,994)

Cash and cash equivalents at beginning
 of period                                                 2,273,242     1,170,861
                                                         ------------  ------------
Cash and cash equivalents at end of period               $ 3,391,236   $   205,867
                                                         ============  ============

Noncash items:
 Forgiveness of amount due GP Strategies                 $   129,886   $
                                                         ===========   ============

The accompanying notes are an integral part of these consolidated condensed financial statements
</TABLE>

<PAGE>


                        INTERFERON SCIENCES, INC. AND SUBSIDIARY

              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS

                                   (Unaudited)

Note 1.  Basis of Presentation

         The  financial   information   included   herein  is  unaudited.   Such
information,  however,  reflects all  adjustments  (consisting  solely of normal
recurring  adjustments) that are, in the opinion of management,  necessary for a
fair  presentation  of the  financial  position  and  operating  results for the
interim periods.  The operating  results for interim periods are not necessarily
indicative of operating results to be expected for the year.

 Note 2.  Inventories

       Inventories are classified as follows:

                               June 30,        December 31,
                                 2000              1999
                           --------------     --------------

   Finished goods          $     570,070      $     361,809
   Work in process             4,778,415          5,296,816
   Raw materials               1,332,560          1,332,560
   Less reserve for
    excess inventory          (5,945,842)        (6,225,185)
                           ---------------     --------------
                           $     735,203      $     766,000
                           ===============     ==============


       Finished  goods  inventory  consists  of vials of  ALFERON  N  Injection,
available  for  commercial  and  clinical use either  immediately  or upon final
release by quality assurance.

       During the three  months  ended June 30,  2000,  the Company  converted a
portion  of its  interferon  intermediates  (work  in  process  inventory)  into
finished goods inventory.

         In light of the  results  to date of the  Company's  phase 3 studies of
ALFERON N Injection in HIV and HCV-infected patients, the Company has recorded a
reserve  against its  inventory of ALFERON N Injection to reflect its  estimated
net realizable  value.  The reserve was a result of the Company's  assessment of
anticipated  near-term projections of product to be sold or utilized in clinical
trials,   giving   consideration  to  historical  sales  levels.  As  a  result,
inventories at June 30, 2000 and December 31, 1999, reflect a reserve for excess
inventory of $5,945,842 and $6,225,185, respectively.

         During the six months  ended June 30,  2000 and 1999,  a portion of the
reserve  for  excess  inventory  was  reversed  in the  amount of  $135,271  and
$582,650,  respectively,  to reflect  inventory at its estimated net  realizable
value. In addition,  during the six months ended June 30, 2000, a portion of the
reserve for excess inventory was used in the amount of $144,072.

Note 3. Agreement with GP Strategies Corporation

         In an agreement  dated March 25, 1999, GP Strategies  Corporation  ("GP
Strategies")  agreed to lend the Company $500,000 (the "GP Strategies Debt"). In
return,  the Company  agreed to grant GP Strategies  (i) a first mortgage on the
Company's  real estate,  (ii) a two-year  option to purchase the Company's  real
estate,  provided that the Company has  terminated  its operations and a certain
liability to the American Red Cross (the "Red Cross") has been repaid, and (iii)
a two-year  right of first refusal in the event the Company  desires to sell its
real  estate.  In  addition,  the  Company  agreed  to  allow a  designee  of GP
Strategies  to attend  any  meeting  with the FDA with  respect to  approval  of
ALFERON N Injection  for the treatment of hepatitis C and to issue GP Strategies
500,000 shares (the "GP Shares") of common stock and five-year  warrant (the "GP
Warrant") to purchase 500,000 shares of common stock at a price of $1 per share.
The GP Shares and GP Warrant were valued at $500,000 and recorded as a financing
cost and amortized over the original  period of the GP Strategies  Debt in 1999.
The Company  also agreed not to increase  its payroll  during the term of the GP
Strategies  Debt  without the prior  consent of GP  Strategies.  Pursuant to the
agreement,  the Company has issued a note to GP Strategies  representing  the GP
Strategies  Debt,  which note was due on September 30, 1999 and bears  interest,
payable at maturity, at the rate of 6% per annum. In addition, at that time, the
Company  negotiated a  subordination  agreement  with the Red Cross  pursuant to
which  the Red  Cross  agreed  that its lien on the  Company's  real  estate  is
subordinate to GP Strategies' lien.

         On March 27,  2000,  the  Company  and GP  Strategies  entered  into an
agreement  pursuant to which (i) the GP Strategies  Debt was extended until June
30, 2001 (and  accordingly is classified as a current  liability and a long-term
liability on the accompanying  consolidated condensed balance sheets at June 30,
2000 and  December 31, 1999,  respectively),  (ii) the Company  agreed to file a
registration statement prior to July 31, 2000 (which the Company is currently in
the process of filing)  covering  the shares  issuable  upon  exercise of the GP
Warrant and any of the GP Shares for which Rule 144 under the  Securities Act of
1933 was not available,  and (iii) the Management  Agreement between the Company
and GP Strategies (whereby certain legal, financial and administrative  services
were  provided  by  GP  Strategies  to  the  Company)  was  terminated  and  all
intercompany  accounts between the Company and GP Strategies  (other than the GP
Strategies Debt) were discharged.  The amount of intercompany accounts that were
discharged was approximately  $130,000,  which was recorded in the quarter ended
March 31, 2000 as a  contribution  to capital.  The agreement also provides that
(i)  commencing  on May 1, 2001 and ending on June 30, 2001,  on any day ISI may
require GP Strategies to exercise the GP Warrant and sell the underlying shares,
if the market price of ISI common stock  exceeds  $1.00 per share on each of the
10 trading days prior to any such day,  and (ii) any  proceeds  from the sale of
the shares  issuable  upon exercise of the GP Warrant in excess of the aggregate
amount paid by GP Strategies to purchase such shares,  would be deemed to reduce
the then outstanding  amount of principal and interest of the GP Strategies Debt
until such amount is reduced to zero.

Note 4.  Agreement with the Red Cross

         In an agreement  dated  November 23, 1998,  the Company agreed to grant
the Red Cross a  security  interest  in  certain  assets to secure the Red Cross
Liability and to issue to the Red Cross  300,000  shares of Common Stock (with a
market value of  $1,171,875 at December 4, 1998) and  additional  shares at some
future date as  requested  by the Red Cross.  The Red Cross  agreed that any net
proceeds  received by it upon sale of such shares  would be applied  against the
Red Cross Liability.

       As the liability to the Red Cross remained  unsettled  until such time as
the Red Cross sells the shares they have already  received and could  receive in
the  future,  the  Company  recorded  any  shares  issued  to the Red  Cross  as
"Settlement  Shares" within  stockholders'  equity.  Any decreases in the market
value of the Company's  common stock below $1.2 million,  until such time as the
Red Cross were to sell its shares,  would impact the value of the shares held by
the Red Cross and accordingly require an adjustment to "Settlement  Shares". Due
to the decline in the Company's stock price during the six months ended June 30,
1999, an adjustment  for $587,261 was recorded  with a  corresponding  charge to
cost of goods sold. Due to the increase in the Company's  stock price during the
three months ended March 31, 2000 up to the date of sale by the Red Cross of all
remaining  Settlement  Shares,  an  adjustment  for $287,341 was recorded with a
corresponding  credit to cost of goods  sold.  During  1999,  the Red Cross sold
27,000 of the  Settlement  Shares and sold the balance of such  shares  (273,000
shares) during the first quarter of 2000. As a result, the net proceeds from the
sales of the  Settlement  Shares,  $33,000 in 1999 and  $368,000  in 2000,  were
applied against the liability to the Red Cross.  The remaining  liability to the
Red Cross at June 30, 2000 and  December 31, 1999 was  approximately  $1,244,000
and $1,579,000, respectively.

     On October 30, 2000, the Company  issued an  accumulated  800,000 shares to
the Red Cross . The net  proceeds  from the sale of such shares by the Red Cross
will be applied against the remaining liability owed to the Red Cross.  However,
there can be no  assurance  that the net  proceeds  from the sale of such shares
will be sufficient to extinguish the remaining liability owed the Red Cross.

Note 5. Operations and Liquidity

       The  Company  has  experienced  significant  operating  losses  since its
inception in 1980. As of June 30, 2000, the Company had an  accumulated  deficit
of approximately  $130.4 million. For the six months ended June 30, 2000 and the
years  ended  December  31,  1999,  1998 and 1997,  the  Company had losses from
operations of approximately $1.6 million, $5.4 million,  $20.8 million and $22.4
million,  respectively.  Although  the Company  received FDA approval in 1989 to
market  ALFERON N Injection  in the United  States for the  treatment of certain
genital  warts and ALFERON N  Injection  currently  is marketed  and sold in the
United  States by the Company,  in Mexico by Industria  Farmaceutica  Andromaco,
S.A. De C.V. and in Germany by Cell Pharm GmbH ("Cell  Pharm"),  the Company has
had  limited  revenues  from the sale of ALFERON N  Injection  to date.  For the
Company to operate profitably,  the Company must sell significantly more ALFERON
N  Injection.  Increased  sales will  depend  primarily  upon the  expansion  of
existing markets and/or successful  attainment of FDA approval to market ALFERON
N Injection  for  additional  indications,  of which there can be no  assurance.
There can be no assurance that sufficient quantities of ALFERON N Injection will
be sold to allow the Company to operate profitably.

         During  the  second  quarter of 2000 and  through  August 3, 2000,  the
Company raised gross proceeds of $7,679,380 from the sale in a private placement
of 11,635,451 shares of common stock at a price of $0.66 per share and warrants,
exercisable until April 2005 to purchase  11,635,451 shares of common stock at a
price of $1.50 per share. The proceeds from this private  placement will be used
to fund new  initiatives,  in addition to funding  certain  projects  within the
Company's  existing  interferon-related  operations.  At August  10,  2000,  the
Company  has  $5,700,000  of cash and cash  equivalents,  with  which to support
future  operating  activities  and to satisfy its financial  obligations as they
become payable.  Management is continuing to actively pursue raising  additional
capital by either (i) issuing  securities  in a private  equity  offering,  (ii)
licensing the rights to its  injectable,  topical or oral  formulations of alpha
interferon,  or (iii) selling the Company.  Insufficient  funds will require the
Company  to  further  delay,  scale  back,  or  eliminate  certain or all of its
activities or to license third parties to commercialize products or technologies
that the Company would otherwise seek to develop itself.

         During  the  second  quarter of 2000,  the  Company  was able to settle
certain amounts owed on various research-related liabilities at a savings to the
Company of approximately $457,000. Such amount was credited against research and
development expenses.

         Based on the Company's estimates of revenues,  expenses,  the timing of
repayment of creditors,  and levels of production,  management believes that the
cash  presently  available  will be sufficient to enable the Company to continue
operations  for at least  the  next  twelve  months.  However,  actual  results,
especially with respect to revenues,  may differ  materially from such estimate,
and no  assurance  can be given that  additional  funding  will not be  required
sooner than anticipated or that such additional funding,  whether from financial
markets or collaborative or other  arrangements with corporate  partners or from
other  sources,  will be  available  when needed or on terms  acceptable  to the
Company.

Note 6.  Restatement of the June 30, 1999 Financial Statements (unaudited)

         The  Company  has  restated  its   consolidated   condensed   financial
statements  for the  three  months  ended  March  31,  1999,  June 30,  1999 and
September  30, 1999 because of errors  discovered  subsequent to the issuance of
such consolidated  condensed financial  statements.  The consolidated  condensed
financial   statements  required   restatement  to  correct  the  reporting  for
inventories,  Settlement Shares, deferred compensation, cost of sales, financing
costs and certain other expenses.

         The impact of the restatement on the Company's  consolidated  condensed
statements of operations for the three months and six months ended June 30, 1999
and cash flows for the six months ended June 30, 1999 is summarized as follows:

<TABLE>
<CAPTION>

                               Three Months Ended

                                  June 30, 1999

   Operations:                                     As Reported        Restated
   ----------                                      -----------        --------
<S>                                                     <C>              <C>
   Revenues

    Alferon N Injection                           $    526,389    $    526,389
                                                  -------------   -------------
   Total revenues                                      526,389         526,389
                                                  -------------   -------------
   Costs and expenses

   Cost of goods sold and idle production costs        603,360         765,408
   Reversal of reserve for excess inventory                           (273,789)
   Research and development                            696,497         696,497
   General and administrative                          458,381         504,792
                                                   -------------   -------------
   Total costs and expenses                          1,758,238       1,692,908
                                                  -------------   -------------
   Loss from operations                             (1,231,849)     (1,166,519)

    Interest income (expense and
      financing costs)                                     640        (249,360)
                                                  -------------   -------------
   Net loss                                       $ (1,231,209)   $ (1,415,879)
                                                  =============   =============

   Basic and diluted loss per share               $       (.26)   $       (.27)
                                                  =============   =============
   Weighted average number of
    shares outstanding                               4,697,034       5,179,034
                                                  =============   =============


                                Six Months Ended

                                  June 30, 1999

   Operations:                                     As Reported        Restated
   ----------                                      -----------        --------

   Revenues

    Alferon N Injection                           $    985,910    $    985,910
    Research products                                      277             277
                                                  -------------   -------------
   Total revenues                                      986,187         986,187
                                                  -------------   -------------
   Costs and expenses

   Cost of goods sold and idle production costs      1,636,579       2,223,840
   Reversal of reserve for excess inventory                           (582,650)
   Research and development                          1,942,989       1,942,989
   General and administrative                        1,261,076       1,285,023
                                                   -------------   ------------
   Total costs and expenses                          4,840,644       4,869,202
                                                  -------------   -------------
   Loss from operations                             (3,854,457)     (3,883,015)

    Interest income (expense and
      financing costs)                                   5,377        (244,623)
                                                  -------------   -------------
   Net loss                                       $ (3,849,080)   $ (4,127,638)
                                                  =============   =============

   Basic and diluted loss per share               $       (.83)   $       (.84)
                                                  =============   =============
   Weighted average number of
    shares outstanding                               4,636,733       4,922,447
                                                  =============   =============

                                Six Months Ended

                                  June 30, 1999

   Cash flows:                                     As Reported        Restated
   ----------                                      -----------        --------

   Cash flows from operations:

       Net loss                                      $ (3,849,080)   $ (4,127,638)
      Adjustments to reconcile net loss to net
       cash used for operating activities:
        Depreciation and amortization                     373,654         373,654
        Amortization of deferred financing costs                          250,000
        Accounts payable and benefits paid with
         common stock                                     603,354          68,979
        Reversal of reserve for excess inventory                         (582,650)
        Market value adjustment                                           587,261
        Loss on sale of other assets                                       51,392
        Change in operating assets and liabilities:
        Inventories                                       520,434         520,434
        Amount due to GP Strategies                       574,264          74,264
        Accounts and other receivables                    480,810         480,810
        Prepaid expenses and other current assets         (78,319)        (78,319)
        Accounts payable and accrued expenses             319,839         878,161
                                                      ------------    ------------
        Net cash used for operations                   (1,055,044)     (1,503,652)
                                                      ------------    ------------

       Cash flows from investing activities:

        Proceeds from sale of other assets                 90,050          38,658
                                                      ------------    ------------
        Net cash provided by investing activities          90,050          38,658
                                                      ------------    ------------
       Cash flows from financing activities:

        Proceeds from note payable to GP Strategies                       500,000
                                                      ------------    ------------
       Net cash provided by financing activities                          500,000
                                                      ------------    ------------
       Net decrease in cash and cash equivalents         (964,994)       (964,994)

       Cash and cash equivalents at beginning of
        period                                          1,170,861       1,170,861
                                                      ------------    ------------
       Cash and cash equivalents at end of period    $    205,867     $   205,867
                                                      ============    ============

</TABLE>


<PAGE>


                          INDEPENDENT AUDITORS' REPORT

The Board of Directors and Stockholders
Interferon Sciences, Inc.:

         We have audited the  consolidated  financial  statements  of Interferon
Sciences,  Inc.  and  subsidiary  as listed  in the  accompanying  index.  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 Interferon
Sciences,  Inc. and subsidiary at December 31, 1999 and 1998, and the results of
their  operations  and their cash flows for each of the years in the  three-year
period ended December 31, 1999 in conformity with generally accepted  accounting
principles.

         The accompanying  consolidated  financial statements have been prepared
assuming that the Company will continue as a going concern. As discussed in Note
3 to the consolidated  financial statements,  the Company has suffered recurring
losses from  operations  and has an accumulated  deficit that raise  substantial
doubt about its ability to continue as a going  concern.  Management's  plans in
regard to these matters are also described in Note 3. The consolidated financial
statements do not include any adjustments  that might result from the outcome of
this uncertainty.

                                                                    /s/ KPMG LLP


New York, New York
April 10, 2000


<PAGE>


                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                           CONSOLIDATED BALANCE SHEETS

                                                        December 31,
                                                        ------------
                                                   1999              1998
                                                   ----              ----

ASSETS

Current assets

  Cash and cash equivalents                     $ 2,273,242        $ 1,170,861
  Accounts and other receivables                     35,561            689,511
  Inventories, net of reserves of
      $6,225,185 and $10,344,551                    766,000            709,784
  Prepaid expenses and other current assets          27,018             36,511
                                                -------------      ------------
Total current assets                              3,101,821          2,606,667
                                                -------------      ------------
Property, plant and equipment, at cost
  Land                                              140,650            140,650
  Buildings and improvements                      7,702,825          7,702,825
  Equipment                                       4,915,798          4,928,298
                                                --------------     ------------
                                                 12,759,273         12,771,773

Less accumulated depreciation                    (9,834,558)        (9,130,248)
                                                ------------       ------------
                                                  2,924,715          3,641,525
                                                ------------       ------------
Patent costs, net of accumulated amortization
  of $301,339 and $270,856                          219,822            250,305
Other assets                                         10,100            100,150
                                                ------------       ------------
                                                $ 6,256,458       $  6,598,647
                                                ============       ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities

  Accounts payable                              $ 4,396,181       $  4,149,666
  Accrued expenses                                  519,285            236,641
  Amount due GP Strategies                          283,637            108,943
                                                -------------     -------------
Total current liabilities                         5,199,103          4,495,250
                                                -------------     -------------
Note payable to GP Strategies                       500,000
                                                -------------     -------------

Commitments

Stockholders' equity

  Preferred stock, par value $.01 per share; authorized - 5,000,000 shares; none
  issued and outstanding Common stock, par value $.01 per share; authorized

   - 55,000,000 shares; issued and outstanding
   - 5,327,473 and 4,360,808 shares                  53,275             43,608
  Capital in excess of par value                129,397,259        127,933,885
  Accumulated deficit                          (128,812,179)      (125,210,096)
  Settlement shares                                 (81,000)          (664,000)
                                                --------------    -------------
Total stockholders' equity                          557,355          2,103,397
                                                --------------    -------------
                                              $   6,256,458        $  6,598,647
                                                =============     =============

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.

<TABLE>
<CAPTION>


                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                      CONSOLIDATED STATEMENTS OF OPERATIONS

                  YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997

                                                 1999          1998             1997
                                               --------       --------         -------
<S>                                             <C>             <C>             <C>
Revenues

ALFERON N Injection                          $  2,328,945   $  1,930,657    $  2,927,585
Research products and other
  revenues                                            277         76,350          28,217
                                              ------------   ------------    ------------
Total revenues                                  2,329,222      2,007,007       2,955,802
                                              ------------   ------------    ------------
Costs and expenses
Cost of goods sold and excess/idle
  production costs                              3,552,026      6,533,462       1,857,959
(Reversal) Provision for excess inventory      (1,177,531)     3,089,841       7,254,710
Research and development                        3,060,019      8,654,888      11,863,987
General and administrative                      2,315,010      4,569,608       4,389,025
                                              ------------   -------------   ------------
Total costs and expenses                        7,749,524     22,847,799      25,365,681
                                              ------------   -------------   ------------
Loss from operations                           (5,420,302)   (20,840,792)    (22,409,879)

Interest income                                     6,104        252,528         670,199
Interest expense and financing costs             (536,394)
Loss on repurchase of preferred stock                             (737,037)
                                               -----------   -------------   ------------
Loss before income tax benefit                 (5,950,592)   (21,325,301)    (21,739,680)

                                               -----------   -------------   ------------
Income tax benefit:
Gain on sale of state net operating loss
  carryovers                                    2,348,509
                                              -------------  -------------   ------------
Net loss                                     $ (3,602,083)  $(21,325,301)   $(21,739,680)
                                              =============  =============   ============
Basic and diluted

  loss per share                             $       (.71)  $      (6.67)   $      (8.15)
                                              =============  =============   ============
Weighted average number of
shares outstanding                              5,088,620      3,199,396       2,668,352
                                              =============  =============   ============




The accompanying notes are an integral part of these consolidated financial statements

</TABLE>


<PAGE>
<TABLE>
<CAPTION>


                                        INTERFERON SCIENCES, INC. AND SUBSIDIARY

                              CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

                                    YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997

                                                                                                                            Total
                                                                                 Capital in                                 stock-

                                            Preferred stock    Common stock      excess of      Accumulated    Settlement   holders
                                             Shares   Amount   Shares   Amount   par value       deficit       shares       equity
                                            -------  ------   -----    ------   ---------       --------      --------      ------
<S>                                           <C>     <C>     <C>      <C>      <C>             <C>            <C>           <C>
Balance at December 31, 1996                           $     2,455,239 $24,552  $107,494,394    $(82,145,115)   $        $25,373,831
Net proceeds from sale of common stock                         582,418   5,824    16,429,896                              16,435,720
Purchase of fractional shares of common stock
 resulting from reverse stock split                                (21)      -          (633)                                  (633)
Common stock issued under Company 401(k) plan                       483      5        22,962                                  22,967
Proceeds from exercise
 of common stock options                                          3,962     40       121,395                                 121,435
Net loss                                                                                          (21,739,680)          (21,739,680)
------------------------------------------------------------------------------------------------------------------------------------
Balance at December 31, 1997                                  3,042,081 30,421       124,068,014 (103,884,795)           20,213,640
Net proceeds from the sale of common
  and preferred stock                         7,500     75      960,000  9,600         9,123,762                           9,133,437
Repurchase of preferred Stock                (7,500)   (75)                           (7,178,925)                        (7,179,000)
Common stock issued as payment against
 negotiated settlement
 and accounts payable                                           330,000  3,300         1,246,794                 (1,189,000)  61,094
Common stock issued as compensation                               3,238     32           116,865                             116,897
Common stock issued
 under Company 401(k) plan                                       25,489    255           170,978                             171,233
Compensation paid in cash in exchange
 of obligation to issue common stock                                                     386,397                             386,397
Market value adjustment                                                                                             525,000  525,000
Net loss                                                                                          (21,325,301)          (21,325,301)
------------------------------------------------------------------------------------------------------------------------------------
Balance at December 31, 1998                                  4,360,808 43,608    127,933,885    (125,210,096)   (664,000) 2,103,397
Common stock issued as financing cost                           500,000  5,000        495,000                                500,000
Common stock issued as payment against
 accounts payable                                               285,000  2,850        531,525                                534,375
Common stock issued
 under Company 401(k) plan                                      181,665  1,817         98,159                                 99,976
Compensation paid in cash in exchange
 of obligation to issue common stock                                                  338,690                                338,690
Settlement shares sold                                                                                               33,000   33,000
Market value adjustment                                                                                             550,000  550,000
Net loss                                                                                           (3,602,083)           (3,602,083)
------------------------------------------------------------------------------------------------------------------------------------
Balance at December 31, 1999                       $          5,327,473 $53,275  $129,397,259   $(128,812,179)    $(81,000) $557,355

The accompanying notes are an integral part of these consolidated financial statements
</TABLE>

<PAGE>

<TABLE>
<CAPTION>

                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                      CONSOLIDATED STATEMENTS OF CASH FLOWS

                  YEARS ENDED DECEMBER 31, 1999, 1998 AND 1997

                                                           1999           1998          1997
                                                         --------       --------       --------
<S>                                                       <C>            <C>             <C>
Cash flows from operations:

  Net loss                                            $ (3,602,083)  $(21,325,301)  $(21,739,680)
  Adjustments to reconcile net loss
    to net cash used for operating activities:
    Depreciation and amortization                          747,293        894,013        782,802
    Amortization of deferred financing costs               500,000
    Compensation and benefits
       paid with common stock                               99,976        288,130         22,967
    (Reversal) provision for excess inventory           (1,177,531)     3,089,841      7,254,710
    Non-cash deferred compensation                         338,690        386,397
    Loss on repurchase of preferred stock                                 737,037
    Market value adjustment                                550,000        515,625
    Provision for impairment of equipment                                 803,217
    Loss on sale of other assets                            51,392
    Change in operating assets
       and liabilities:
    Inventories                                          1,121,315      (466,972)     (6,258,765)
    Accounts and other receivables                         653,950       299,947        (756,421)
    Prepaid expenses and other current assets                9,493        28,842          96,666
    Amount due to GP Strategies                            174,694       130,847          60,998
    Accounts payable and accrued expenses                1,096,534       517,040       1,570,704
                                                    ---------------   ------------  -------------
  Net cash provided by (used for) operations               563,723   (14,101,337)    (18,966,019)
                                                    ---------------   ------------  -------------
Cash flows from investing activities:

  Additions to property, plant and equipment                             (78,235)     (1,023,175)
  Proceeds from sale of other assets                        38,658        73,750
                                                    ---------------   ------------  ------------
  Net cash provided by (used for)
    investing activities                                   38,658        (4,485)     (1,023,175)
                                                    ---------------   ------------  -------------
Cash flows from financing activities:

  Proceeds from GP Strategies                              500,000
  Net proceeds from sale of common stock                               1,954,437      16,435,720
  Net proceeds from preferred stock offering                           7,179,000
  Repurchase of preferred stock                                       (7,916,037)
  Proceeds from exercise of common stock options                                         121,435
  Purchase of fractional shares of common stock                                             (633)
                                                    ---------------   ------------  -------------
  Net cash provided by financing activities                500,000     1,217,400      16,556,522
                                                    ---------------   ------------  -------------
Net increase (decrease) in cash and cash equivalents     1,102,381   (12,888,422)     (3,432,672)

Cash and cash equivalents at beginning of year           1,170,861    14,059,283      17,491,955
                                                    --------------    ------------  -------------
Cash and cash equivalents at end of year            $    2,273,242   $ 1,170,861     $14,059,283
                                                    ==============    ============  =============

The accompanying notes are an integral part of these consolidated financial statements

</TABLE>

<PAGE>


                    INTERFERON SCIENCES, INC. AND SUBSIDIARY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1. Organization and Business

         Interferon  Sciences,  Inc.  (the  "Company")  is  a  biopharmaceutical
company  that  operates  in a  single  segment  and is  engaged  in  the  study,
manufacture,  and sale of pharmaceutical  products based on its highly purified,
multispecies,  natural source alpha interferon ("Natural Alpha Interferon"). The
Company's ALFERON(R) N Injection  (Interferon Alfa-n3) product has been approved
by the United States Food and Drug  Administration  ("FDA") for the treatment of
certain  types of genital  warts and is being  studied for  potential use in the
treatment  of HIV,  hepatitis C, and other  indications.  Alferon N Injection is
sold  principally  in the United States,  however,  a portion is sold in foreign
countries.  For the years ended December 31, 1999, 1998 and 1997, domestic sales
totaled $2,204,437,  $1,716,157 and $2,613,430,  respectively, and foreign sales
(primarily Germany) totaled $124,508, $214,500 and $314,155,  respectively.  All
identifiable  assets are  located  in the United  States.  The  Company  also is
studying  ALFERON N Gel and  ALFERON  LDO(R),  the  Company's  topical  and oral
formulations of Natural Alpha Interferon,  for the potential  treatment of viral
and immune system diseases. (See Note 5).

         Integrated  Commercialization  Solutions, Inc. ("ICS"), a subsidiary of
Bergen Brunswig Corporation,  is the sole United States distributor of ALFERON N
Injection.  ICS  distributes  ALFERON N Injection to wholesalers  throughout the
United States.  The Company does not believe that the loss of any one wholesaler
would  have a  material  adverse  effect  on the  Company's  sales or  financial
position.

Note 2.   Summary of Significant Accounting Policies

         Principles of consolidation -- The  consolidated  financial  statements
include  the  operations  of the  Company and  Interferon  Sciences  Development
Corporation ("ISD"), its wholly owned subsidiary.  All significant  intercompany
transactions and balances have been eliminated.

         Cash and cash  equivalents  -- The Company  considers all highly liquid
instruments  with  maturities  of three months or less from  purchase date to be
cash equivalents.

         Property,  plant and  equipment -- Property,  plant and  equipment  are
carried  at  cost.  Major  additions  and  betterments  are  capitalized   while
maintenance  and  repairs,  which do not  extend  the lives of the  assets,  are
expensed.

         Depreciation -- The Company  provides for depreciation and amortization
of plant and  equipment  following the  straight-line  method over the estimated
useful lives of such assets as follows:

                  Class of Assets                         Estimated Useful Lives
                  Buildings and Improvements              15 to 30 years
                  Equipment                                5 to 10 years

         Patent  costs -- The Company  capitalizes  costs to obtain and maintain
patents  and  licenses.   Patent  costs  are  amortized   over  17  years  on  a
straight-line  basis. To the extent a patent is determined to be worthless,  the
related net capitalized cost is immediately expensed.

         Revenue recognition -- Sales are recorded upon shipment of product.

         Collaborative  agreement research and development  revenues and costs -
The costs of performing  research and  development  are expensed when  incurred.
Generally,  the  Company  matches its  collaborative  research  and  development
revenues in the same accounting  periods in which the related research costs are
incurred.  However, when the revenues are exhausted,  the Company has the option
to continue the research activities at its own expense.

         Inventories  --  Inventories,  consisting  of raw  materials,  work  in
process and finished goods,  are stated at the lower of cost or market on a FIFO
basis.  Inventory in excess of the Company's  estimated  usage  requirements  is
written down to its estimated net realizable value. Inherent in the estimates of
net realizable  value are management  estimates  related to the Company's future
manufacturing schedules, customer demand, possible alternative uses and ultimate
realization of potentially excess inventory.

         Long-Lived Assets -- The Company reviews  long-lived assets and certain
identifiable   intangibles   for  impairment   whenever  events  or  changes  in
circumstances  indicate  that  the  carrying  amount  of an  asset  may  not  be
recoverable.  Recoverability  of  assets  to be held and used is  measured  by a
comparison of the carrying  amount of an asset to future net cash flows expected
to be generated by the assets. If such assets are considered to be impaired, the
impairment  to be  recognized  is measured  by the amount by which the  carrying
amount of the assets exceeds the estimated  fair value of the assets.  Assets to
be disposed of are  reported at the lower of the  carrying  amount or  estimated
fair value less costs to sell.  Due to the  circumstances  described  in Note 7,
during 1998,  the Company  ceased  production  of finished  goods  inventory and
continues to hold its long-lived  assets for use. In addition,  as the Company's
financial and operating  situation had continued to worsen (as further described
in Note 3), and after  consideration of projected revenues for 1999, the Company
determined that the carrying value of their equipment was impaired. Accordingly,
the Company  recorded a charge for  impairment  of its  equipment of $803,217 in
December  1998 to  write  down  this  equipment  to its  estimated  fair  value.
Management  has  determined,   based  on  their  best  estimates  and  available
information,  the estimated fair value of this equipment to be that amount which
could be recovered through the sale of the equipment.  No further impairment was
deemed to exist at December 31, 1999. Quoted market prices are not available.

         Stock option plan - The Company  applies the provision of SFAS No. 123,
Accounting for Stock-Based Compensation, which requires entities to recognize as
expense over the vesting period the fair value of all stock-based  awards on the
date of grant.  As permitted  under SFAS No. 123, the Company elects to continue
to apply the  provisions  of APB Opinion No. 25 and provide pro forma net income
(loss) and pro forma earnings  (loss) per share  disclosures  for employee stock
option  grants made in 1995 and future years as if the  fair-value-based  method
defined in SFAS No. 123 had been applied and, accordingly,  no compensation cost
has  been  recognized  for  its  stock  options  in the  consolidated  financial
statements.

         Reverse  stock  split -- As a result of a  one-for-four  reverse  stock
split  effective as of March 21, 1997,  and a  one-for-five  reverse stock split
effective as of January 6, 1999, all shares and per share  information have been
restated.

         Loss per share -- Basic earnings  (loss) per share (EPS) are based upon
the weighted  average  number of common  shares  outstanding  during the period.
Diluted  EPS are  based  upon the  weighted  average  number  of  common  shares
outstanding  during the period  assuming the  issuance of common  shares for all
dilutive  potential  common shares  outstanding.  At December 31, 1999, 1998 and
1997, the Company's  options and warrants are  anti-dilutive and therefore basic
and diluted EPS are the same.

         Use of  Estimates  in the  Preparation  of  Financial  Statements - The
preparation  of financial  statements  in  conformity  with  generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the  reported  amounts  of assets  and  liabilities,  and  disclosure  of
contingent assets and liabilities,  at the date of the financial statements, and
the  reported  amounts of revenues  and expenses  during the  reporting  period.
Actual results could differ from those estimates.

         Income  taxes - Income  taxes  are  accounted  for  under the asset and
liability  method.  Deferred tax assets and  liabilities  are recognized for the
future tax  consequences  attributable  to  differences  between  the  financial
statement  carrying  amounts  of  existing  assets  and  liabilities  and  their
respective  tax  bases  and for  operating  loss and tax  credit  carryforwards.
Deferred  tax  assets and  liabilities  are  measured  using  enacted  tax rates
expected  to apply to  taxable  income  in the  years in which  those  temporary
differences are expected to be recovered or settled.  The effect on deferred tax
assets and  liabilities  of a change in tax rates is recognized in income in the
period that includes the enactment date.

         Reclassifications   -  Certain   balances  in  prior  years  have  been
reclassified to conform to the presentation adopted in the current year.

Note 3.   Operations and Liquidity

         The Company has  experienced  significant  operating  losses  since its
inception  in 1980.  As of December  31,  1999,  the Company had an  accumulated
deficit of approximately  $128.8 million. For the years ended December 31, 1999,
1998 and 1997,  the Company had losses from  operations  of  approximately  $5.4
million,  $20.8 million and $22.4  million,  respectively.  Although the Company
received FDA approval in 1989 to market ALFERON N Injection in the United States
for the treatment of certain genital warts and ALFERON N Injection  currently is
marketed and sold in the United  States by the  Company,  in Mexico by Industria
Farmaceutica  Andromaco,  S.A. De C.V.  and in Germany by Cell Pharm GmbH ("Cell
Pharm"),  the  Company  has had  limited  revenues  from the sale of  ALFERON  N
Injection to date. For the Company to operate profitably,  the Company must sell
significantly  more ALFERON N Injection.  Increased sales will depend  primarily
upon the  expansion of existing  markets  and/or  successful  attainment  of FDA
approval to market  ALFERON N Injection  for  additional  indications,  of which
there can be no assurance.  There can be no assurance that sufficient quantities
of ALFERON N Injection will be sold to allow the Company to operate profitably.

         The Company has limited  financial  resources  as of December  31, 1999
with which to support future  operating  activities and to satisfy its financial
obligations as they become  payable.  Consequently,  management is continuing to
actively pursue raising additional capital by either (i) issuing securities in a
private equity offering, (ii) licensing the rights to its injectable, topical or
oral   formulations  of  alpha   interferon,   or  (iii)  selling  the  Company.
Insufficient  funds will require the Company to further  delay,  scale back,  or
eliminate  certain  or all of its  activities  or to  license  third  parties to
commercialize  products or technologies that the Company would otherwise seek to
develop itself.

         Based on the  Company's  estimates of revenues,  expenses and levels of
production,  management  believes  that the  cash  presently  available  will be
sufficient to enable the Company to continue  operations  through  approximately
June 30, 2000. However, actual results, especially with respect to revenues, may
differ  materially  from such  estimates,  and no  assurance  can be given  that
additional  funding will not be required  sooner than  anticipated  or that such
additional  funding,  whether from financial  markets or  collaborative or other
arrangements  with corporate  partners or from other sources,  will be available
when needed or on terms acceptable to the Company.

Note 4.   Agreements with Hoffmann-LaRoche

         F. Hoffmann-La  Roche Ltd. and  Hoffmann-LaRoche,  Inc.  (collectively,
"Hoffmann")  have been issued patents  covering  human alpha  interferon in many
countries  throughout the world.  In 1995, the Company  obtained a non-exclusive
perpetual  license from Hoffmann  (the  "Hoffmann  Agreement")  which grants the
Company the worldwide rights to make, use, and sell,  without a potential patent
infringement  claim from Hoffmann,  any formulation of Natural Alpha Interferon.
The  Hoffmann  Agreement  permits  the  Company to grant  marketing  rights with
respect to Natural Alpha Interferon  products to third parties,  except that the
Company cannot grant marketing rights with respect to injectable products in any
country in which  Hoffmann has patent rights  covered by the Hoffmann  Agreement
(the  "Hoffmann  Territory")  to any third  party not  listed on a  schedule  of
approximately 50 potential  marketing  partners without the consent of Hoffmann,
which consent cannot be unreasonably withheld.

         Under the terms of the Hoffmann Agreement,  the Company is obligated to
pay  Hoffmann an aggregate  royalty on net sales (as  defined) of Natural  Alpha
Interferon  products by the Company in an amount equal to (i) 8% of net sales in
the Hoffmann  Territory,  and 2% of net sales outside the Hoffmann  Territory of
products manufactured in the Hoffmann Territory,  up to $75,000,000 of net sales
in any calendar year and (ii) 9.5% of net sales in the Hoffmann  Territory,  and
2% of net sales outside the Hoffmann  Territory of products  manufactured in the
Hoffmann Territory,  in excess of $75,000,000 of net sales in any calendar year,
provided  that the total  royalty  payable in any calendar year shall not exceed
$8,000,000.  For the years ended  December 31, 1999,  1998 and 1997, the Company
recorded  approximately  $94,000,  $77,000 and  $117,000 in royalty  expenses to
Hoffmann,  respectively. The Hoffmann Agreement can be terminated by the Company
on 30 days notice  with  respect to the United  States  patent,  any  individual
foreign patent, or all patents owned by Hoffmann.  If the Hoffmann  Agreement is
terminated with respect to the patents owned by Hoffmann in a specified country,
such country is no longer included in the Hoffmann Territory.  Accordingly,  the
Company would not be permitted to market any formulation of alpha  interferon in
such country.

Note 5.  Research and Development Agreement with Interferon Sciences Research
         Partners, Ltd.

         In 1984, the Company  organized ISD to act as the sole general  partner
of Interferon Sciences Research Partners, Ltd., a New Jersey limited partnership
(the "Partnership").  The Company and the Partnership entered into a development
contract  whereby the Company  received  substantially  all of the net  proceeds
($4,414,475)  of  the  Partnership's  public  offering  of  limited  partnership
interests.  The Company used the proceeds to perform  research,  development and
clinical testing on behalf of the Partnership for the development of ALFERON Gel
containing recombinant interferon.

         In connection with the formation of the Partnership, ISD agreed to make
additional cash contributions for purposes of continuing  development of ALFERON
Gel if the Partnership exhausted its funds prior to development of such product.
ISD is wholly  dependent  upon the Company for capital to fund such  commitment.
The Partnership  exhausted its funds during 1986, and the Company  contributed a
total of  $1,997,000  during the  period  from 1986 to 1990,  for the  continued
development  of  ALFERON  Gel.  In 1987,  the  Company  filed a Product  License
Application  with the FDA for approval to market  ALFERON Gel. In February 1990,
the FDA indicated that additional process  development and clinical trials would
be necessary  prior to approval of ALFERON Gel.  The Company  believed,  at that
time, that the costs to complete the required  process  development and clinical
trials would be  substantial,  and there could be no assurance that the clinical
trials would be successful.

         As a result of the above events,  in 1992, the Company withdrew its FDA
Product License Application for ALFERON Gel containing  recombinant  interferon.
In place of single  species  recombinant  interferon,  previously  ALFERON Gel's
active  ingredient,  the Company  commenced,  in 1992,  further  development  of
ALFERON Gel using the Company's  natural source  multi-species  alpha interferon
("ALFERON N Gel"). Assuming successful  development and commercial  exploitation
of ALFERON N Gel,  which to date has not occurred,  the Company may be obligated
to pay the  Partnership  royalties  equal to 4% of the  Company's  net  sales of
ALFERON N Gel and 15% of revenues received from sublicensing ALFERON N Gel.

Note 6.   Agreement with Cell Pharm GmbH

         In 1996, the Company entered into a supply and  distribution  agreement
(the "Cell Pharm  Agreement")  with Cell Pharm.  Cell  Pharm,  headquartered  in
Hanover, Germany, is a privately owned pharmaceutical company primarily involved
in the  distribution  and manufacture of products for cancer treatment and other
uses.  The Cell Pharm  Agreement,  which  terminates  on June 30,  2001,  unless
renewed,  grants Cell Pharm rights to  distribute,  promote,  and sell ALFERON N
Injection in Germany.  The Cell Pharm  Agreement  provides that the Company will
supply Cell Pharm with ALFERON N Injection at specified  prices,  and  obligates
Cell Pharm to  purchase  specified  minimum  amounts in each annual  period.  In
addition,  Cell Pharm is  required  to pay the  Company  50% of the  incremental
revenue  Cell Pharm  receives as a result of selling  ALFERON N  Injection  at a
price higher than a specified  price.  To date, no incremental  revenue has been
generated.  Cell Pharm has informed  the Company that it is marketing  ALFERON N
Injection under the trade name  Cytoferon(R),  pursuant to Cell Pharm's existing
regulatory  approval to market  Cellferon in Germany for the  treatment of hairy
cell leukemia and for the treatment of patients who develop  antibodies  against
recombinant alpha interferons.

Note 7. Inventories

         Inventories, consisting of material, labor and overhead, are classified
as follows:

                                                                  December 31,
                                                       1999            1998
                                                       --------------------

         Finished goods ................             $  361,809    $ 3,443,786
         Work in process...............               5,296,816      6,466,914
         Raw materials..................              1,332,560      1,143,635
         Less reserve for excess inventory           (6,225,185)   (10,344,551)
                                                    ------------   ------------
                                                   $    766,000    $   709,784
                                                    ============   ============

         Finished  goods  inventory  consists  of vials of ALFERON N  Injection,
available  for  commercial  and  clinical use either  immediately  or upon final
release by quality assurance.

         In light of the  results  to date of the  Company's  Phase 3 studies of
ALFERON  N  Injection  in  HIV-  and  HCV-infected  patients,  the  Company  has
written-down  the carrying  value of its inventory of ALFERON N Injection to its
estimated  net  realizable  value.  The  write-down is a result of the Company's
assessment  of  anticipated  near-term  projections  of  product  to be  sold or
utilized in clinical trials, giving consideration to historical sales levels. As
a result,  inventories  at  December  31,  1999 and 1998,  reflect a reserve for
excess inventory of $6,225,185 and $10,344,551, respectively.

         During  1999,  the reserve  for excess  inventory  was  reversed in the
amount of $1,177,531.

         In addition,  during 1999,  approximately  $2,900,000  of inventory was
written off against the reserve for excess  inventory  since the  inventory  had
expired and could no longer be sold or used for clinical trials.

Note 8. Preferred Stock

         On February 5, 1998, the Company  completed the sale of 7,500 shares of
Series  A  Convertible  Preferred  Stock  to an  institutional  investor  for an
aggregate amount of $7,500,000.  The $7,179,000 of net proceeds were expected to
augment the  Company's  working  capital  while  awaiting the results of the two
Phase 3 clinical trials of ALFERON N Injection for the treatment of HIV-infected
and  hepatitis C  patients.  After  considering  the  reaction of the  Company's
stockholders to the issuance and the negative impact the issuance apparently had
on the Company's  market  capitalization,  the Board of Directors  determined on
February 13, 1998 to exercise an option to repurchase  the shares of Convertible
Preferred  Stock for $7,894,737  (plus accrued  dividends).  The net loss to the
Company on the repurchase of the Preferred Stock amounted to $737,037.

Note 9. Income Taxes

         As a result  of the loss  allocation  rules  contained  in the  Federal
income tax  consolidated  return  regulations,  approximately  $6,009,000 of net
federal  operating  loss  carry-forwards,  which  expire from 2001 to 2006,  are
available  to  the  Company  upon  ceasing  to be a  member  of GP  Strategies's
consolidated  return  group in 1991.  In  addition,  the Company has net federal
operating  loss  carry-forwards  for periods  subsequent  to May 31,  1991,  and
through December 31, 1999 of approximately $93,565,000 which expire from 2006 to
2014.  For the year ended December 31, 1999, the Company had a tax net operating
loss of $9,318,000, which expires in 2014.

         The Company  believes that the events  culminating  with the closing of
its Common Stock  Offering on August 22, 1995 resulted in an "ownership  change"
under Internal Revenue Code, Section 382, with respect to its stock. The Company
believes that as a result of the  ownership  change,  the future  utility of its
pre-change net operating losses are limited to an annual amount of approximately
$3,230,000. In addition, the Company has approximately $33,000 of investment tax
credit  carry-forwards,  which  expire  in 2000 and  $488,000  of  research  and
development credit  carry-forwards,  which expire from 2000 to 2002 that are, in
accordance  with  Internal  Revenue  Code,  Section  383,  subject to the annual
limitation under Internal Revenue Code Section 382.

The tax effects that give rise to deferred tax assets and liabilities consist of
the following as of December 31, 1999 and 1998:

Deferred tax assets                             1999             1998
-------------------                             ---------------------

Net operating loss carry-forwards           $31,601,000    $ 28,644,000
Tax credit carry-forwards                       521,000         676,000
Inventory                                     2,117,000       3,517,000
Property and equipment,
  principally due to differences
  in basis and depreciation                     387,000         246,000
                                           ------------     -----------
Net deferred tax asset                       34,626,000      33,083,000
Valuation allowance                         (34,626,000)    (33,083,000)
                                          ------------     ------------
Net deferred tax asset after
  valuation allowance                     $    ---        $     ---
                                          ============     ============


         A valuation  allowance is provided when it is more likely than not that
some  portion  of the  deferred  tax asset will be  realized.  The  Company  has
determined,  based on the  Company's  history of annual net losses,  that a full
valuation allowance is appropriate.

         The  Company  participates  in the  State of New  Jersey's  corporation
business tax benefit certificate transfer program (the "Program"),  which allows
certain high  technology  and  biotechnology  companies  to transfer  unused New
Jersey net operating loss  carryovers to other New Jersey  corporation  business
taxpayers.  During 1999, the Company  submitted an application to the New Jersey
Economic Development Authority (the "EDA") to participate in the Program and the
application  was  approved.  The EDA then issued a  certificate  certifying  the
Company's eligibility to participate in the Program and the amount of New Jersey
net operating loss  carryovers the Company has available to transfer.  Since New
Jersey law  provides  that net  operating  losses can be carried  over for up to
seven years,  the Company may be able to transfer  its New Jersey net  operating
losses from the last seven years.  The Company  estimated that, as of January 1,
1999, it had  approximately  $85 million of unused New Jersey net operating loss
carryovers available for transfer under the Program. The Program requires that a
purchaser pay at least 75% of the amount of the surrendered tax benefit.

         During December 1999, the Company  completed the sale of  approximately
$32 million of its New Jersey tax loss carryforwards and received $2.35 million,
which was recorded as a gain on sale of state net operating  loss  carryovers on
its Consolidated Statement of Operations.  In June 2000, the Company will submit
an application to sell an additional $4.8 million of tax benefits (calculated by
multiplying  the Company's  unused New Jersey net operating  loss  carryovers of
approximately  $53 million by 9%). The actual amount of tax benefits the Company
may sell will depend upon the allocation among qualifying companies of an annual
pool established by the State of New Jersey. The allocated pool for future years
is $40 million per year.

Note 10.  Common Stock, Stock Options, Warrants and Other Shares Reserved

         On January 6, 1999, the Company's  stockholders  approved a proposal to
amend  the  Company's   Restated   Certificate  of  Incorporation  to  affect  a
one-for-five  reverse  stock split of the Company's  Common  Stock.  The reverse
stock split was  effective as of January 6, 1999.  As of January 6, 1999,  there
were  21,804,138  shares of Common Stock  outstanding  and after the stock split
there were 4,360,808 shares of Common Stock outstanding.

         The par value of the  Common  Stock  did not  change as a result of the
reverse  stock split.  Cash was paid in lieu of  fractional  shares based on the
last reported sale price of the Common Stock on the first trading date after the
stock split.

         The Company has a stock option plan (the  "Plan"),  which  authorizes a
committee  of the Board of  Directors to grant  options,  to purchase  shares of
Common Stock, to officers, directors,  employees and consultants of the Company.
Pursuant  to the terms of the Plan,  no option may be  exercised  after 10 years
from the date of grant.  The Plan  permits  options to be granted at a price not
less than 85% of the fair market  value,  however,  the options  granted to date
have been at fair market value of the common stock at the date of the grant.

         At December  31,  1999,  the per share  weighted-average  fair value of
stock options granted during 1999,  1998 and 1997 was $.21,  $2.20 and $22.05 on
the  date of  grant  using  the  Black  Scholes  option-pricing  model  with the
following weighted-average  assumptions: 1999 - expected dividend yield of 0.0%,
risk-free interest rate of 6.1%,  expected  volatility of 116.4% and an expected
life of 4.0 years;  1998 - expected dividend yield of 0.0%,  risk-free  interest
rate of 4.3%,  expected  volatility of 113.9% and an expected life of 5.0 years;
1997 -  expected  dividend  yield  of  0.0%,  risk-free  interest  rate of 6.3%,
expected volatility of 85.5% and an expected life of 4.4 years.

         The Company  applies APB Opinion No. 25 in accounting for its Plan, and
accordingly,  no compensation  cost has been recognized for its stock options in
the consolidated financial statements.  Had the Company determined  compensation
cost based on the fair value at the grant date for its stock  options under SFAS
No.  123,  the  Company's  net loss would have been  increased  to the pro forma
amounts indicated below:

                                      1999            1998           1997
                                      ----            ----           ----

Net loss            as reported     $(3,602,083)  $(21,325,301)  $(21,739,680)
                    pro forma        (4,231,122)   (21,868,534)   (24,255,223)

Basic and diluted

  loss per share    as reported     $      (.71)  $      (6.67)  $      (8.15)
                    pro forma              (.83)         (6.84)         (9.10)

         Pro forma net loss reflects  options  granted between 1995 and 1999. In
addition, compensation cost is reflected over the options' vesting period.

         Employee  stock option  activity for options  under the Plan during the
periods indicated is as follows:

                                                  Number of    Weighted-Average
                                                  Shares       Exercise Price

                                                  ---------    -----------
        Balance at December 31, 1996              160,013         $35.95
                  Granted                         117,733          33.25
                  Exercised                        (2,909)         29.40
                  Forfeited                        (4,942)         30.60
                  Expired                         (57,528)         41.35
                                                ----------
         Balance at December 31, 1997             212,367          33.20

                  Granted                         336,234           2.65
                     Forfeited                     (9,787)         32.25
                  Expired                            (725)         46.05
                                                ----------
         Balance at December 31, 1998             538,089           1.40


                  Granted                       1,487,792            .25
                  Forfeited                      (138,621)          1.40
                                                ----------
          Balance at December 31, 1999          1,887,260            .25


         On October 27, 1999, the Company  repriced all existing  employee stock
options to have an  exercise  price of $.25 (the  closing  market  price on that
date) and an  expiration  date of December 31, 2003.  Accordingly,  the weighted
average price of options  outstanding at December 31, 1999 has been re-stated to
$.25.  All other  terms and  conditions  remain the same with the  exception  of
repricing the exercise price and the new expiration date.

         On October 15, 1998, the Company  repriced all existing  employee stock
options to have an exercise  price of $1.40 (the  closing  market  price on that
date).

         At December 31, 1999, the exercise price and weighted-average remaining
contractual life of outstanding options was $.25 and 4 years, respectively.

         At December 31, 1999, 1998 and 1997, the number of options  exercisable
was  641,755,  249,434  and  153,758,  respectively,  and  the  weighted-average
exercise price of those options was $.25, $1.40 and $35.20, respectively.

Information regarding all Options and Warrants

         Changes in options  and  warrants  outstanding  during the years  ended
December  31, 1999,  1998 and 1997,  and options and  warrants  exercisable  and
shares reserved for issuance at December 31, 1999, 1998 and 1997 are as follows:

         The  following  table  includes  all  options  and  warrants  including
employee options (which are discussed above).

                                                 Price Range        Number of
                                                  Per Share          Shares

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

    Outstanding at December 31, 1996        $21.80   -    $84.00       295,252
    Granted                                  25.00   -     77.90       172,619
    Exercised                                21.80   -     40.00       ( 3,962)
    Terminated                               25.00   -     84.00       (68,720)
                                           ---------------------    -----------
    Outstanding at December 31, 1997         21.80   -     77.90       395,189
    Granted                                   2.65   -     41.90       336,234
    Terminated                               25.00   -     55.00       (10,512)
                                           ---------------------    -----------



    Outstanding at December 31, 1998          1.40   -     77.90       720,911
    Granted                                    .25   -      1.00     1,987,792
    Terminated                                1.40   -     54.00      (141,671)
                                               --------------------  ----------

    Outstanding at December 31, 1999           .25   -     77.90     2,567,032
                                                                    ==========

    Exercisable:

    December 31, 1997                        21.80   -     77.90       309,616
                                                                    ==========
    December 31, 1998                         1.40   -     77.90       432,256
                                                                    ==========
    December 31, 1999                          .25   -     77.90     1,321,527
                                                                    ==========
    Shares reserved for issuance:

    December 31, 1997                                                  425,879
                                                                    ==========
    December 31, 1998                                                  739,364
                                                                    ==========
    December 31, 1999                                                2,573,479
                                                                    ==========

         Options and warrants  outstanding and exercisable,  and shares reserved
for issuance at December 31, 1999, 1998 and 1997,  include 33,282 shares under a
warrant agreement with a certain  individual.  The warrants are priced at $51.35
and $77.90 per share and expire on August 31, 2000.

         Options and warrants  outstanding and exercisable,  and shares reserved
for issuance at December 31, 1999,  1998 and 1997,  include  55,113 shares under
warrant  agreements with the underwriter of a 1995 Stock Offering.  The warrants
are priced at $37.20 per share and expire on August 14, 2000.

         Options and warrants  outstanding and exercisable,  and shares reserved
for issuance at December 31, 1999,  1998 and 1997,  include  64,413 shares under
warrant  agreements with the underwriter of a 1996 Stock Offering.  The warrants
are priced at $48.00 per share and expire on April 23, 2001.

         Options and warrants  outstanding  and shares  reserved for issuance at
December 31, 1999 1998 and 1997, and  exercisable at December 31, 1999 and 1998,
include 26,964 shares under warrant  agreements with the  underwriters of a 1997
Stock Offering. The warrants are priced at $36.00 per share and expire on August
18, 2002.

         Options and warrants  outstanding and exercisable,  and shares reserved
for  issuance at December  31,  1999,  include  500,000  shares  under a warrant
agreement  with GP  Strategies.  The  warrants are priced at $1.00 per share and
expire on March 25, 2004.

         Shares  reserved  for  issuance at  December  31,  1999,  1998 and 1997
include  6,447,  18,451 and 30,690  shares under the common  stock  compensation
plan. (See Note 12).

Note 11.  Savings Plan

         The ISI Savings Plan (the "Savings Plan") permits pre-tax contributions
to the Savings Plan by  participants  pursuant to Section 401(k) of the Internal
Revenue Code of up to 15% of base compensation. The Company will match up to the
6% level of the participants  eligible  contributions.  The Savings Plan matches
40% in cash and 60% in the Company's  common stock up to the 6% level. For 1999,
the  Company's  contribution  to the Savings Plan was  $137,000,  consisting  of
$37,024 in cash and $99,976 in stock.  For 1998, the Company's  contribution  to
the Savings Plan was  $288,000,  consisting  of $116,767 in cash and $171,233 in
stock.  For 1997, the Company's  contribution  to the Savings Plan was $126,000,
consisting of $103,033 in cash and $22,967 in stock.

Note 12.  Common Stock Compensation and Profit Sharing Plan

Common Stock Compensation Plan

         Effective  October 1,  1997,  the  Company  adopted  the  Common  Stock
Compensation Plan (the "Stock Compensation Plan"),  providing key employees with
the   opportunity  of  receiving  the  Company's   common  stock  as  additional
compensation.

         Pursuant to the terms of the Stock  Compensation  Plan,  key  employees
will  receive,  as  additional  compensation,  a  pre-determined  amount  of the
Company's common stock in three equal installments on October 1, 1998, 1999, and
2000,  provided  that the key  employees  remain in the employ of the Company at
each  such  installment  date.  As of  October  1,  1999 and  1998,  a  deferred
compensation liability of $340,821 and $412,344,  respectively,  was accrued for
these  employees  based on the common stock market price of October 1, 1997.  On
October 1, 1999 and 1998, the Company agreed to pay the additional  compensation
in cash in place of the issuance of the  Company's  common  stock.  Accordingly,
cash of  $2,131  and  $25,947,  respectively,  was paid in  satisfaction  of the
accrued  liability of $340,821 and  $412,344,  respectively.  The  difference of
$338,690 and $386,397  was  credited to  additional  paid in capital in 1999 and
1998,  respectively.  At December 31, 1999, the total number of shares  reserved
for issuance under the Stock Compensation Plan for the remaining  installment is
6,447 and the amount of $72,480 is recorded in accrued expenses.

Profit Sharing Plan

         The Company  has a Profit  Sharing  Plan (the  "Profit  Sharing  Plan")
providing key  employees and  consultants  with an  opportunity  to share in the
profits of the Company. The Profit Sharing Plan is administered by the Company's
Compensation Committee.

         Pursuant  to the terms of the Profit  Sharing  Plan,  the  Compensation
Committee, in its sole discretion, based upon the significance of the employee's
contributions  to the operations of the Company,  selects  certain key employees
and  consultants  of the Company who are entitled to  participate  in the Profit
Sharing Plan and determines the extent of their participation. The amount of the
Company's   profits   available  for  distribution  to  the  participants   (the
"Distribution  Pool") is the lesser of (a) 10% of the  Company's  income  before
taxes and profit  sharing  expense  and (b) an amount  equal to 100% of the base
salary for such year of all the participants in the Profit Sharing Plan.

         The Compensation  Committee may require as a condition to participation
that a  participant  remain in the  employ of the  Company  until the end of the
fiscal year for which payment is to be made.  Payments required to be made under
the  Profit  Sharing  Plan  must be made  within  10 days of the  filing  of the
Company's tax return.  To date,  there have been no contributions by the Company
under the Profit Sharing Plan.

Note 13.  Related Party Transactions

         GP Strategies owns approximately 6% of the Company's common stock as of
December 31, 1999.  The Company was a party to a  management  agreement  with GP
Strategies,  pursuant  to which  certain  legal,  financial  and  administrative
services  had been  provided by  employees  of GP  Strategies.  The fee for such
services in 1999, 1998 and 1997 was $120,000 annually.  The management agreement
was  terminated  on March 27,  2000 (See Note 15). In  addition,  during 1997 GP
Strategies provided to the Company, at its estimated cost, certain personnel and
services which the Company used in its  operations.  For the year ended December
31, 1997, such charges amounted to $135,000.  During the year ended December 31,
1998, the Company  provided  certain  services to GP Strategies at the Company's
estimated   cost  of   $25,000.   Such  costs  were   included  in  general  and
administrative expense.

         The  Company  owns  the   buildings   which  contain  its  offices  and
laboratories  and until  March  1998  leased a portion  of the  buildings  to GP
Strategies. Total occupancy costs for the years ended December 31, 1998 and 1997
were approximately $1,084,000 and $1,039,000,  respectively.  GP Strategies paid
to the  Company as rent GP  Strategies'  proportionate  share of such  occupancy
costs  (based on both  square  feet  occupied  and number of  personnel),  which
amounted to $29,375 and  $234,996,  respectively.  Such income was included as a
reduction to research and development expense.

         See Note 15 for information  with respect to royalty  obligations to GP
Strategies.

Note 14.  Supplemental Statement of Cash Flow Information

         The  Company  paid no income  taxes or interest  during the  three-year
period ended December 31, 1999.

         During the years ended  December 31, 1999,  1998 and 1997 the following
non-cash financing and investing activities occurred:

1999:

         The Company issued 285,000 shares,  valued at $534,375, of Common Stock
as payment against accounts payable and the purchase of inventory.

         As  consideration  for a loan from GP  Strategies,  the Company  issued
500,000 shares and warrants to purchase an additional 500,000 shares,  valued at
$500,000.

1998:

         The Company  issued 330,000 shares valued at $1,250,094 of common stock
as payment against a negotiated settlement (see Note 15) and accounts payable.

         The Company  issued 3,238 shares  valued at $116,897 of common stock as
compensation.

1997:

         None

Note 15.  Commitments

         The  Company  has  obtained   human  white  blood  cells  used  in  the
manufacture of ALFERON N Injection from several sources,  including the American
Red Cross (the "Red Cross")  pursuant to a supply  agreement dated April 1, 1997
(the "Supply Agreement"). The Company will not need more human white blood cells
until such time as  production  of ALFERON N Injection  is resumed,  and has not
purchased any since April 1, 1998. Under the terms of the Supply Agreement,  the
Company was  obligated  to purchase a minimum  amount of human white blood cells
each month  through  March 1999 (the  "Minimum  Purchase  Commitment"),  with an
aggregate Minimum Purchase  Commitment during the period from April 1998 through
March 1999 of in excess of $3,000,000. As of November 23, 1998, the Company owed
the Red Cross  approximately  $1.46  million plus interest at the rate of 6% per
annum  accruing from April 1, 1998 (the "Red Cross  Liability")  for white blood
cells purchased pursuant to the Supply Agreement.

         In an agreement  dated  November 23, 1998,  the Company agreed to grant
the Red Cross a  security  interest  in  certain  assets to secure the Red Cross
Liability and to issue to the Red Cross  300,000  shares of Common Stock (with a
market value of  $1,171,875 at December 4, 1998) and  additional  shares at some
future date as  requested  by the Red Cross.  The Red Cross  agreed that any net
proceeds  received by it upon sale of such shares  would be applied  against the
Red Cross Liability and that at such time as the Red Cross Liability was paid in
full, the Minimum Purchase  Commitment would be deleted effective April 1, 1998,
and any then  existing  breaches of the  Minimum  Purchase  Commitment  would be
waived.  In January 1999, the Company granted the Red Cross a security  interest
in,  among other  things,  the  Company's  real  estate,  equipment,  inventory,
receivables, and New Jersey net operating loss carryovers to secure repayment of
the Red Cross Liability, and the Red Cross agreed to forbear from exercising its
rights under the Supply Agreement,  including with respect to collecting the Red
Cross  Liability,  until June 30, 1999 (which was  subsequently  extended  until
December 31,  1999).  On December 29,  1999,  the Company,  the Red Cross and GP
Strategies entered into an agreement pursuant to which the Red Cross agreed that
until  September 30, 2000 it would forbear from  exercising its rights under (i)
the  Supply  Agreement,  including  with  respect  to  collecting  the Red Cross
Liability,  and (ii) the Security  Interest.  Under the terms of such agreement,
the Company is allowing the Red Cross to sell the Company's real estate.  In the
event the Red Cross is  successful  in selling the  Company's  real estate,  the
Company would hope to be able to enter into a lease with the new owner, although
there can be no assurance.

         As the liability to the Red Cross remains  unsettled until such time as
the Red Cross sells the shares they have already  received and could  receive in
the  future,  the  Company has  recorded  any shares  issued to the Red Cross as
"Settlement  Shares" within  stockholders'  equity.  Any decreases in the market
value of the Company's  common stock below $1.2 million,  until such time as the
Red Cross were to sell its shares,  would impact the value of the shares held by
the Red Cross and accordingly require an adjustment to "Settlement  Shares". Due
to the decline in the  Company's  stock price during 1999 and from  November 23,
1998 to December  31,  1998,  an  adjustment  for $550,000 and $525,000 has been
recorded  with a  corresponding  charge  to  operations  during  1999 and  1998,
respectively.  During 1999, the Red Cross sold 27,000 of the  Settlement  Shares
and sold the balance of 273,000  shares  during the first  quarter of 2000. As a
result,  the net proceeds from the sales of the  Settlement  Shares,  $33,000 in
1999 and  $368,000,  were  applied  against  the  liability  to Red  Cross.  The
remaining  liability  to the Red Cross at December 31, 1999 and at April 1, 2000
was approximately $1,579,000 and $1,228,000, respectively.

         In an agreement dated March 25, 1999, GP Strategies  agreed to lend the
Company $500,000 at the rate of $250,000 a month (the "GP Strategies  Debt"). In
return,  the Company  agreed to grant GP Strategies  (i) a first mortgage on the
Company's  real estate,  (ii) a two-year  option to purchase the Company's  real
estate,  provided that the Company has  terminated  its  operations  and the Red
Cross Liability has been repaid,  and (iii) a two-year right of first refusal in
the event the Company desires to sell its real estate. In addition,  the Company
agreed to allow a designee of GP  Strategies  to attend any meeting with the FDA
with respect to approval of ALFERON N Injection for the treatment of hepatitis C
and to issue GP Strategies  500,000 shares (the "GP Shares") of Common Stock and
five-year  warrant (the "GP Warrant") to purchase 500,000 shares of Common Stock
at a price of $1 per share. The GP Shares and GP Warrant were valued at $500,000
and recorded as a financing cost on the Consolidated Statement of Operations and
amortized over the original  period of the GP Strategies  Debt. The Company also
agreed not to increase  its payroll  during the term of the GP  Strategies  Debt
without  the prior  consent of GP  Strategies.  Pursuant to the  agreement,  the
Company has issued a note to GP Strategies  representing the GP Strategies Debt,
which  note  matured  on  September  30,  1999 and bears  interest,  payable  at
maturity,  at the rate of 6% per annum.  In addition,  at that time, the Company
negotiated a  subordination  agreement  with the Red Cross pursuant to which the
Red Cross agreed that its lien on the Company's real estate is subordinate to GP
Strategies' lien. On March 27, 2000, the Company and GP Strategies  entered into
an agreement  pursuant to which (i) the GP  Strategies  Debt was extended  until
June 30, 2001 (and  reclassified as long-term on the  accompanying  Consolidated
Balance  Sheet  at  December  31,  1999),  (ii)  the  Company  agreed  to file a
registration  statement prior to July 31, 2000 covering the shares issuable upon
exercise of the GP Warrant and any of the GP Shares for which Rule 144 under the
Securities  Act of 1933 was not available,  and (iii) the  Management  Agreement
between  the  Company  and GP  Strategies  was  terminated  (see  Note 13 to the
Consolidated  Financial  Statements) and all  intercompany  accounts between the
Company and GP Strategies  (other than the GP Strategies  Debt) were  discharged
and  eliminated.  The amount of  intercompany  accounts that were discharged and
eliminated was approximately $130,000,  which were recorded in the first quarter
of 2000.  The agreement  also  provides  that (i)  commencing on May 1, 2001 and
ending on June 30, 2001,  on any day ISI may require GP  Strategies  to exercise
the GP Warrant and sell the underlying shares, if the market price of ISI Common
Stock  exceeds  $1.00 per share on each of the 10 trading days prior to any such
day, and (ii) any proceeds from the sale of the shares issuable upon exercise of
the GP  Warrant  in excess of the  aggregate  amount  paid by GP  Strategies  to
purchase such shares,  would be deemed to reduce the then outstanding  amount of
principal and interest of the GP Strategies Debt until such amount is reduced to
zero.

         As consideration  for the transfer to the Company of certain  licenses,
rights and assets  upon the  formation  of the  Company  by GP  Strategies,  the
Company agreed to pay GP Strategies  royalties of $1,000,000,  but such payments
will be made only with  respect to those  years in which the  Company has income
before income  taxes,  and will be limited to 25% of such income.  To date,  the
Company  has not  generated  income  before  taxes  and  therefore  has not paid
royalties to GP Strategies.

         See Notes 4 and 5 for  information  relating  to  royalties  payable to
Hoffmann and the Partnership, respectively.

         In 1989, the Company entered into a license agreement with Amarillo for
co-exclusive  rights to certain low dose oral  formulations  of interferon.  The
Company  will be required to pay a royalty of 10% of net sales,  as defined,  of
products  produced and  marketed by the Company that may be developed  under the
license agreement. To date, no sales of these products have occurred, therefore,
no royalty payments have been made.

Note 16.  Fair Value of Financial Instruments

         The carrying values of financial  instruments,  including cash and cash
equivalents,  accounts receivable and accounts payable,  approximate fair market
values,  because of short maturities or interest rates that approximate  current
rates.

Note 17.  Restatement of 1999 Quarterly Financial Statements (unaudited)

         The Company has restated its  consolidated  financial  statements as of
and for the three months ended March 31, June 30, and September 30, 1999 because
of errors  discovered  for those  periods  subsequent  to the  issuance  of such
consolidated  financial  statements.  The consolidated  financial statements for
each three-month and year to date periods ended in 1999 required  restatement to
correct the reporting for inventories, Settlement Shares, deferred compensation,
cost of sales, financing costs and certain other expenses.


         The impact of the  restatement  on the Company's  consolidated  balance
sheets and statements of operations is summarized as follows:
<TABLE>
<CAPTION>


                         Three Months Ended        Three Months Ended       Three Months Ended
                           March 31, 1999             June 30, 1999         September 30, 1999
                       As Reported   Restated    As Reported  Restated    As Reported  Restated
<S>                     <C>           <C>           <C>         <C>          <C>        <C>
Operations:
----------
Total costs
    and expenses       $3,082,406    $3,176,294   $1,758,238  $1,692,908  $1,447,232  $1,396,584
Loss from operations   (2,622,608)   (2,716,496)  (1,231,849) (1,166,519)   (448,957)   (398,309)
Net loss               (2,617,871)   (2,711,759)  (1,231,209) (1,415,879)   (448,957)   (648,309)
Basic and diluted loss
    per share                (.57)         (.58)        (.26)       (.27)       (.09)       (.12)



                           Six Months Ended         Nine Months Ended
                            June 30, 1999          September 30, 1999
                       As Reported   Restated    As Reported  Restated

Total costs
    and expenses       $4,840,644    $4,869,202  $6,287,876   $6,265,786
Loss from operations   (3,854,457)   (3,883,015) (4,303,414)  (4,281,324)
Net loss               (3,849,080)   (4,127,638) (4,298,037)  (4,775,947)
Basic and diluted loss
    per share                (.83)         (.84)       (.92)        (.95)


                           March 31, 1999             June 30, 1999         September 30, 1999
                       As Reported   Restated    As Reported  Restated    As Reported  Restated

Balance Sheet:
-------------
Total current assets   $1,048,991    $1,857,852   $  718,748  $1,551,398  $  603,338  $1,311,338
Total assets            4,764,092     5,572,953    4,247,024   5,079,674   3,944,781   4,652,781
Total current
 liabilities            4,705,057     4,682,593    5,389,353   5,413,300   5,521,618   5,620,267
Total stockholders'
 equity (deficit)          59,035       890,360   (1,142,329)   (333,626) (1,576,837)   (967,486)
Total liabilities and
 stockholders' equity   4,764,092     5,572,953    4,247,024    5,079,674   3,944,781   4,652,781


</TABLE>

<PAGE>


         No person has been  authorized  in  connection  with the offering  made
hereby to give any  information or to make any  representation  not contained in
this prospectus and, if given or made, such information or  representation  must
not be relied  upon as having  been  authorized  by the  company or the  selling
stockholders.  This  prospectus  does  not  constitute  an  offer  to  sell or a
solicitation  of any offer to buy any of the  securities  offered  hereby to any
person or by anyone in any  jurisdiction  in which it is  unlawful  to make such
offer or solicitation. Neither the delivery of this prospectus nor any sale made
hereunder  shall,  under any  circumstances,  create  any  implication  that the
information  contained  herein is correct as of any date  subsequent to the date
hereof.

         TABLE OF CONTENTS                                                 PAGE

         Summary...............................................................3
         Risk Factors .........................................................4
         Price Range of Common Stock and Dividends............................13
         Use of Proceeds......................................................14
         Selected Financial Data..............................................15
         Management's Discussion and Analysis
             of Financial Condition and Results
             of Operations....................................................16
         Business.............................................................25
         Management...........................................................40
         Certain Relationships and Related
             Transactions.....................................................43
         Principal Stockholders...............................................45
         Description of Capital Stock.........................................46
         Selling Stockholders ................................................47
         Plan of Distribution ................................................53
         Legal Matters .......................................................54
         Experts .............................................................54
         Where You Can Find More Information .................................54
         Index to Consolidated Financial Statements..........................F-1


                            INTERFERON SCIENCES, INC.

                                  COMMON STOCK

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

                                   PROSPECTUS

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

                                November __, 2000


<PAGE>




10

                                       II-


<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

         The following  table sets forth the various  expenses to be paid by the
Company in connection with the issuance and distribution of the securities being
registered  hereby.  All  the  amounts  are  estimates,  except  the  commission
registration  fee.  The selling  stockholders  will bear the cost of all selling
commissions  and  underwriting  discounts  with  respect  to  the  sale  of  any
securities by them.

         Securities and Exchange Commission registration fee ..       $ 1,247.44
         Legal fees and expenses ..............................         5,000.00
         Accounting and Miscellaneous expenses ................        35,000.00
                                                                     -----------
Total..........................................................       $41,247.44
                                                                     ===========

ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

 .........Article  9 of  the  Company's  Restated  Certificate  of  Incorporation
provides  that the Company  shall,  to the full extent  then  permitted  by law,
indemnify  all persons  whom it may  indemnify  pursuant  thereto.  In addition,
Article 10 of the Company's  Restated  Certificate of  Incorporation  eliminates
personal  liability  of its  directors  to the full extent  permitted by Section
102(b)(7) of the General Corporation Law of the State of Delaware.

 .........Section  145 of the  General  Corporation  Law of the State of Delaware
permits a corporation to indemnify its directors and officers  against  expenses
(including  attorney's fees),  judgments,  fines and amounts paid in settlements
actually and reasonably  incurred by them in connection with any action, suit or
proceeding brought by third parties, if such directors or officers acted in good
faith and in a manner  they  reasonably  believed to be in or not opposed to the
best interests of the  corporation  and, with respect to any criminal  action or
proceeding, had no reason to believe their conduct was unlawful. In a derivative
action, i.e., one by or in the right of the corporation,  indemnification may be
made only for  expenses  actually  and  reasonably  incurred  by  directors  and
officers in connection  with the defense or settlement of an action or suit, and
only with  respect  to a matter as to which  they shall have acted in good faith
and in a manner  they  reasonably  believed  to be in or not opposed to the best
interest of the  corporation,  except that no  indemnification  shall be made if
such person shall have been adjudged liable to the corporation,  unless and only
to the  extent  that the court in which the  action  or suit was  brought  shall
determine  upon  application  that  the  defendant  officers  or  directors  are
reasonably  entitled to indemnity for such expenses despite such adjudication of
liability.

 .........Section  102(b)(7)  of the  General  Corporation  Law of the  State  of
Delaware  provides  that a  corporation  may  eliminate  or limit  the  personal
liability  of a director to the  corporation  or its  stockholders  for monetary
damages for breach of fiduciary duty as a director, provided that such provision
shall not  eliminate or limit the  liability of a director (i) for any breach of
the director's duty of loyalty to the corporation or its stockholders,  (ii) for
acts or omissions not in good faith or which 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  from which the director
derived an improper personal benefit. No such provision shall eliminate or limit
the liability of a director for any act or omission  occurring prior to the date
when such provision becomes effective.

 .........The Company currently has a $5,000,000 directors' and officers'
         liability insurance policy.

ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES

     Except as  described  in the  prospectus,  there  were no  recent  sales of
unregistered securities.

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

         (a) Exhibits

Exhibit

Number............Exhibit Description


3.1 - Restated  Certificate of  Incorporation  of the  Registrant.  Incorporated
herein by reference to Exhibit 3B of the Registrant's Annual Report on Form 10-K
for the year ended December 31, 1988.

3.2 - Certificate of Amendment of Restated  Certificate of  Incorporation of the
Registrant.  Incorporated  herein by  reference  to Exhibit 3.4 of  Registration
Statement No. 33-40902.

3.3 - Certificate of Amendment of Restated  Certificate of  Incorporation of the
Registrant.  Incorporated  herein by  reference  to Exhibit 3.2 of  Registration
Statement No. 33-40902.

3.4 - Certificate of Amendment to the Restated  Certificate of  Incorporation of
the Registrant.  Incorporated herein by reference to Exhibit 3.4 of Registration
Statement No. 33-00845.

3.5 - Certificate of Amendment to the Restated  Certificate of  Incorporation of
the  Registrant.  Incorporated  by reference to Exhibit 3.5 of the  Registrant's
Annual Report on Form 10-K for the year ended December 31, 1996.

3.6 - By-Laws of the Registrant, as amended. Incorporated herein by reference to
Exhibit 3.2 of Registration Statement No. 2-7117.

4.1 - Form of  Underwriter's  Purchase  Option  issued  in  connection  with the
August/September 1995 Offering.  Incorporated herein by reference to Exhibit 4.1
of Registration Statement No. 33-59479.

4.2 - Form of  Underwriter's  Purchase  Option issued in connection with the May
1996 Offering.  Incorporated  herein by reference to Exhibit 4.4 of Registration
Statement No. 333-00845.

4.3 - Form of  Purchase  Option  issued in  connection  with the  December  1996
Private Placement.  Incorporated by reference to Exhibit 4.3 of the Registrant's
Annual Report on Form 10-K for the year ended December 31, 1996.

5 - Opinion of Duane, Morris & Heckscher LLP (to be filed by amendment).

10.1  -  Transfer  and  License   Agreement   among  National   Patent,   Hydron
Laboratories,  Inc. and the Registrant dated as of January 1, 1981. Incorporated
herein by reference to Exhibit 10.8 of the Registrant's  Registration  Statement
No. 2-71117.

10.2 - Registrant's 1981 Stock Option Plan, as amended.  Incorporated  herein by
reference to Exhibit 10.3 to Registration Statement No. 33-59479.

10.3 - Profit Sharing Plan of the Registrant.  Incorporated  herein by reference
to Exhibit 10X of the Registrant's Annual Report on Form 10-K for the year ended
December 31, 1988.

10.4 - License  Agreement  dated  October 20, 1989  between the  Registrant  and
Amarillo Cell Culture Company, Incorporated. Incorporated herein by reference to
Exhibit 10Y of the  Registrant's  Annual  Report on Form 10-K for the year ended
December 31, 1989.

10.5 - GP Strategies 401(k) Savings Plan dated January 9, 1992,  effective March
1, 1992.  Incorporated  herein by reference to Exhibit 10.12 to the Registrant's
Annual Report on Form 10-K for the Year ended December 31, 1992.

10.6 - Distribution  Agreement  dated as of February 3, 1994 between  Registrant
and Industria Farmaceutica  Andromaco,  S.A. Incorporated herein by reference to
Exhibit 6(a) to the Registrant's Quarterly Report on Form 10-Q/A for the quarter
ended September 30, 1994.

10.7 -  Processing  and Supply  Agreement  dated as of September 1, 1994 between
Registrant and Sanofi Winthrop L.P.  Incorporated herein by reference to Exhibit
6(a) to the  Registrant's  Quarterly  Report on Form 10-Q for the quarter  ended
September 30, 1994.

10.8 -  Amendment  dated March 24, 1995 to  Distribution  Agreement  dated as of
February 3, 1994 between  Registrant and Industria  Farmaceutica  Andromaco S.A.
Incorporated  herein by reference to Exhibit  10.30 to the  Registrant's  Annual
Report on Form 10-K for the year ended December 31, 1994.

10.9 - License  Agreement,  dated as of March 29,  1995,  among the  Registrant,
Hoffmann-La Roche, Inc. and F. Hoffmann La-Roche,  Ltd.  Incorporated  herein by
reference to Exhibit 10.42 to Registration Statement No. 33-59479.

10.10 -  Amendment  of  ACC/ISI  License  Agreement,  dated  27,  1995,  between
Registrant and Amarillo Cell Culture Company, Incorporated.  Incorporated herein
by reference to Exhibit 10.43 to Registration Statement No. 33-59479.

10.11 - PPM/ACC Sub License  Agreement,  dated April 27,  1995,  between  Pharma
Pacific  Management Pty. Ltd., and Amarillo Cell Culture Company,  Incorporated.
Incorporated herein by reference to Exhibit 10.52 to Registration  Statement No.
33-59479.

10.12 - Supply and Distribution  Agreement,  dated as of April 3, 1996,  between
the Registrant and Cell Pharm GmbH.  Incorporated herein by reference to Exhibit
10.56 to Registration Statement No. 333-00845.

10.13 - Quality  Assurance  Agreement,  dated as of April 3, 1996,  between  the
Registrant  and Cell Pharm GmbH.  Incorporated  herein by  reference  to Exhibit
10.57 to Registration Statement No. 333-00845.

10.14 - Agreement,  dated as of April 1, 1997,  between the  Registrant  and the
American  National Red Cross.  Incorporated by reference to Exhibit 10.54 of the
Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997.

10.15 - Agreement dated May 27, 1997,  between the Registrant and Alternate Site
Distributors,   Inc.   Incorporated   by  reference  to  Exhibit  10.55  of  the
Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997.

10.16 - Stock Bonus Plan.  Incorporated  by  reference  to Exhibit  10.57 of the
Registrant's Annual Report on Form 10-K for the year ended December 31, 1997.

10.17 - Form of  employment  agreement  for  participants  in Stock  Bonus Plan.
Incorporated by reference to Exhibit 10.58 of the Registrant's  Annual Report on
Form 10-K for the year ended December 31, 1997.

10.18  -  Employment  Agreement,  dated  as of  October  1,  1997,  between  the
Registrant and Lawrence M. Gordon. Incorporated by reference to Exhibit 10.59 of
the  Registrant's  Annual  Report on Form 10-K for the year ended  December  31,
1997.

21.0 - Subsidiaries of the Registrant. **

23.1 - Consent of independent auditors.

23.2 - Consent of Duane, Morris & Heckscher LLP (to be included in their opinion
to be filed as Exhibit 5).

24* - Powers of Attorney  (included in the Signature  Page to this  Registration
Statement).

 *Filed herewith.
** Previously filed.

(b)      Financial Statement Schedules

              Schedules  have been omitted  because they are not required or are
              not  applicable or the required  information  has been included in
              the financial statements or the notes thereto.

ITEM 17.  UNDERTAKINGS

         (a) The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
         being made, a post-effective amendment to this registration statement:

                            (i) To include any prospectus required by section
                  10(a)(3) of the Securities Act of 1933.
                           (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of the registration statement
                  (or the most recent  post-effective  amendment thereof) which,
                  individually  or in the  aggregate,  represent  a  fundamental
                  change  in the  information  set  forth  in  the  registration
                  statement.  Notwithstanding  the  foregoing,  any  increase or
                  decrease in volume of securities  offered (if the total dollar
                  value of  securities  offered  would not exceed that which was
                  registered)  and any deviation from the low or high end of the
                  estimated  maximum offering range may be reflected in the form
                  of  prospectus  filed  with the  Commission  pursuant  to Rule
                  424(b) if, in the  aggregate,  the changes in volume and price
                  represent  no more than a 20% change in the maximum  aggregate
                  offering price set forth in the  "Calculation  of Registration
                  Fee" table in the effective registration statement.

                           (iii)  To  include  any  material   information  with
                  respect to the plan of distribution  not previously  disclosed
                  in the  registration  statement or any material change to such
                  information in the registration statement.

                  Provided, however, that 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  to  be  included  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 and Exchange Act of 1934
                  that  are   incorporated  by  reference  in  the  registration
                  statement.

                  (2) That, for the purpose of determining  any liability  under
         the Securities Act, each such post-effective  amendment shall be deemed
         to be a new registration  statement  relating to the securities offered
         therein,  and the  offering  of such  securities  at that time shall be
         deemed to be the initial bona fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.

(b) Insofar as indemnification  for liabilities arising under the Securities Act
of 1933 may be permitted to directors,  officers and controlling  persons of the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such indemnification is against public policy as expressed in the Securities Act
of  1933  and is,  therefore,  unenforceable.  In the  event  that a  claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant 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  Securities
Act and will be governed by the final adjudication of such issue.
<PAGE>



                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant  has duly  caused  this  registration  statement  to be signed on its
behalf  by  the  undersigned,  thereunto  duly  authorized,  in  the  County  of
Middlesex, State of New Jersey on November 6, 2000.

                                                     INTERFERON SCIENCES, INC.


                                                  By   /s/ Lawrence M. Gordon
                                                      -----------------------
                                                           Lawrence M. Gordon
                                                      Chief Executive Officer

                                POWER OF ATTORNEY

         Each person whose  signature  appears  below  constitutes  and appoints
Lawrence M. Gordon,  Stanley G. Schutzbank,  Ph.D., and Samuel H. Ronel,  Ph.D.,
and each of them, with full power of substitution  and  resubstitution  and each
with full power to act without the other,  his true and lawful  attorney-in-fact
and agent,  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 all
other  documents  in  connection  therewith,  with the  Securities  and Exchange
Commission or any state,  granting unto said  attorneys-in-fact  and agents, and
each of them,  full power and authority to do and perform each and every act and
thing requisite and 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 attorneys-in-fact and agents, or any of them, or their,
his  substitutes  or  substitute,  may lawfully do or cause to be done by virtue
hereof.

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

Date: November 6, 2000                  /s/ Lawrence M. Gordon
                                        ----------------------------------------
                                              Lawrence M. Gordon
                                            Chief Executive Officer and Director
                                           (Principal Executive Officer)

Date: November 6, 2000                  /s/ Donald W. Anderson
                                        ----------------------------------------
                                              Donald W. Anderson
                                              Controller
                                    (Principal Accounting and Financial Officer)




Date: November 6, 2000                 /s/ Stanley G. Schutzbank
                                        ----------------------------------------
                                             Stanley G. Schutzbank, Ph.D.
                                             President and Director

Date: November 6, 2000                /s/ Samuel H. Ronel
                                        ----------------------------------------
                                            Samuel H. Ronel, Ph.D.
                                            Chairman of the Board

Date: November __, 2000
                                        ----------------------------------------
                                            Sheldon Glashow, Ph.D.
                                            Director


<PAGE>


                                  EXHIBIT INDEX

Exhibit

Number            Exhibit Description

3.1 - Restated  Certificate of  Incorporation  of the  Registrant.  Incorporated
herein by reference to Exhibit 3B of the Registrant's Annual Report on Form 10-K
for the year ended December 31, 1988.

3.2 - Certificate of Amendment of Restated  Certificate of  Incorporation of the
Registrant.  Incorporated  herein by  reference  to Exhibit 3.4 of  Registration
Statement No. 33-40902.

3.3 - Certificate of Amendment of Restated  Certificate of  Incorporation of the
Registrant.  Incorporated  herein by  reference  to Exhibit 3.2 of  Registration
Statement No. 33-40902.

3.4 - Certificate of Amendment to the Restated  Certificate of  Incorporation of
the Registrant.  Incorporated herein by reference to Exhibit 3.4 of Registration
Statement No. 33-00845.

3.5 - Certificate of Amendment to the Restated  Certificate of  Incorporation of
the  Registrant.  Incorporated  by reference to Exhibit 3.5 of the  Registrant's
Annual Report on Form 10-K for the year ended December 31, 1996.

3.6 - By-Laws of the Registrant, as amended. Incorporated herein by reference to
Exhibit 3.2 of Registration Statement No. 2-7117.

4.1 - Form of  Underwriter's  Purchase  Option  issued  in  connection  with the
August/September 1995 Offering.  Incorporated herein by reference to Exhibit 4.1
of Registration Statement No. 33-59479.

4.2 - Form of  Underwriter's  Purchase  Option issued in connection with the May
1996 Offering.  Incorporated  herein by reference to Exhibit 4.4 of Registration
Statement No. 333-00845.

4.3 - Form of  Purchase  Option  issued in  connection  with the  December  1996
Private Placement.  Incorporated by reference to Exhibit 4.3 of the Registrant's
Annual Report on Form 10-K for the year ended December 31, 1996.

5* - Opinion of Duane, Morris & Heckscher LLP (to be filed by amendment).

10.1  -  Transfer  and  License   Agreement   among  National   Patent,   Hydron
Laboratories,  Inc. and the Registrant dated as of January 1, 1981. Incorporated
herein by reference to Exhibit 10.8 of the Registrant's  Registration  Statement
No. 2-71117.

10.2 - Registrant's 1981 Stock Option Plan, as amended.  Incorporated  herein by
reference to Exhibit 10.3 to Registration Statement No. 33-59479.

10.3 - Profit Sharing Plan of the Registrant.  Incorporated  herein by reference
to Exhibit 10X of the Registrant's Annual Report on Form 10-K for the year ended
December 31, 1988.

10.4 - License  Agreement  dated  October 20, 1989  between the  Registrant  and
Amarillo Cell Culture Company, Incorporated. Incorporated herein by reference to
Exhibit 10Y of the  Registrant's  Annual  Report on Form 10-K for the year ended
December 31, 1989.

10.5 - GP Strategies 401(k) Savings Plan dated January 9, 1992,  effective March
1, 1992.  Incorporated  herein by reference to Exhibit 10.12 to the Registrant's
Annual Report on Form 10-K for the Year ended December 31, 1992.

10.6 - Distribution  Agreement  dated as of February 3, 1994 between  Registrant
and Industria Farmaceutica  Andromaco,  S.A. Incorporated herein by reference to
Exhibit 6(a) to the Registrant's Quarterly Report on Form 10-Q/A for the quarter
ended September 30, 1994.

10.7 -  Processing  and Supply  Agreement  dated as of September 1, 1994 between
Registrant and Sanofi Winthrop L.P.  Incorporated herein by reference to Exhibit
6(a) to the  Registrant's  Quarterly  Report on Form 10-Q for the quarter  ended
September 30, 1994.

10.8 -  Amendment  dated March 24, 1995 to  Distribution  Agreement  dated as of
February 3, 1994 between  Registrant and Industria  Farmaceutica  Andromaco S.A.
Incorporated  herein by reference to Exhibit  10.30 to the  Registrant's  Annual
Report on Form 10-K for the year ended December 31, 1994.

10.9 - License  Agreement,  dated as of March 29,  1995,  among the  Registrant,
Hoffmann-La Roche, Inc. and F. Hoffmann La-Roche,  Ltd.  Incorporated  herein by
reference to Exhibit 10.42 to Registration Statement No. 33-59479.

10.10 -  Amendment  of  ACC/ISI  License  Agreement,  dated  27,  1995,  between
Registrant and Amarillo Cell Culture Company, Incorporated.  Incorporated herein
by reference to Exhibit 10.43 to Registration Statement No. 33-59479.

10.11 - PPM/ACC Sub License  Agreement,  dated April 27,  1995,  between  Pharma
Pacific  Management Pty. Ltd., and Amarillo Cell Culture Company,  Incorporated.
Incorporated herein by reference to Exhibit 10.52 to Registration  Statement No.
33-59479.

10.12 - Supply and Distribution  Agreement,  dated as of April 3, 1996,  between
the Registrant and Cell Pharm GmbH.  Incorporated herein by reference to Exhibit
10.56 to Registration Statement No. 333-00845.

10.13 - Quality  Assurance  Agreement,  dated as of April 3, 1996,  between  the
Registrant  and Cell Pharm GmbH.  Incorporated  herein by  reference  to Exhibit
10.57 to Registration Statement No. 333-00845.

10.14 - Agreement,  dated as of April 1, 1997,  between the  Registrant  and the
American  National Red Cross.  Incorporated by reference to Exhibit 10.54 of the
Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997.

10.15 - Agreement dated May 27, 1997,  between the Registrant and Alternate Site
Distributors,   Inc.   Incorporated   by  reference  to  Exhibit  10.55  of  the
Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 1997.

10.16 - Stock Bonus Plan.  Incorporated  by  reference  to Exhibit  10.57 of the
Registrant's Annual Report on Form 10-K for the year ended December 31, 1997.

10.17 - Form of  employment  agreement  for  participants  in Stock  Bonus Plan.
Incorporated by reference to Exhibit 10.58 of the Registrant's  Annual Report on
Form 10-K for the year ended December 31, 1997.

10.18  -  Employment  Agreement,  dated  as of  October  1,  1997,  between  the
Registrant and Lawrence M. Gordon. Incorporated by reference to Exhibit 10.59 of
the  Registrant's  Annual  Report on Form 10-K for the year ended  December  31,
1997.

21.0 - Subsidiaries of the Registrant.*

23.1 - Consent of independent auditors.

23.2 - Consent of Duane, Morris & Heckscher LLP (included in their opinion to be
filed as Exhibit 5).

24* - Powers of Attorney  (included in the Signature  Page to this  Registration
Statement).

*Filed herewith.

<PAGE>


Exhibit 21

                         Subsidiaries of the Registrant

Name                                                        Jurisdiction

Interferon Sciences Development Corporation                  Delaware


<PAGE>


                                  Exhibit 23.1

                         CONSENT OF INDEPENDENT AUDITORS

The Board of Directors
Interferon Sciences, Inc.:

         We  consent  to the  use  of  our  report  included  herein  and to the
reference to our firm under the headings "Selected Financial Data" and "Experts"
in the prospectus.

         Our report dated April 10, 2000 contains an explanatory  paragraph that
states the Company has  suffered  recurring  losses from  operations  and has an
accumulated  deficit which raise substantial doubt about its ability to continue
as a going concern.  The  consolidated  financial  statements do not include any
adjustments that might result from the outcome of that uncertainty.

                                  /s/ KPMG LLP

New York, New York
November 6, 2000






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