IMMUNE RESPONSE CORP
S-3, 1998-06-09
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>
                                       
   As filed with the Securities and Exchange Commission on June 9, 1998.
                                                     Registration No. 333-_____
- -------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                        THE IMMUNE RESPONSE CORPORATION
             (Exact name of registrant as specified in its charter)


          Delaware                                         33-0255679      
(State or other jurisdiction of                         (I.R.S. Employer   
incorporation or organization)                         Identification No.) 

                                5935 Darwin Court
                            Carlsbad, California 92008
                                  (760) 431-7080
          (Address, including zip code, and telephone number, including
              area code of registrant's principal executive offices)



                                                          Copies to:

       DENNIS J. CARLO, Ph.D.                      THOMAS E. SPARKS, JR., ESQ.
President and Chief Executive Officer            Pillsbury Madison & Sutro LLP
   The Immune Response Corporation                      P. O. Box 7880
         5935 Darwin Court                       San Francisco, CA 94120-7880
      Carlsbad, California 92008                       (415) 983-1000 
          (760) 431-7080
(Name, address, including zip code, and 
 telephone number, including area code,
      of agent for service)


Approximate date of commencement of proposed sale to the public:  From time 
to time after the effective date of this Registration Statement as determined 
by the Selling Stockholder.

If the only securities being registered on this Form are being offered 
pursuant to dividend or interest reinvestment plans, please check the 
following box: [ ]

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, other than securities offered only in connection with dividend or 
interest reinvestment plans, please 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 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 MAXIMUM        PROPOSED MAXIMUM
    TITLE OF EACH CLASS OF                AMOUNT TO BE     OFFERING PRICE PER     AGGREGATE OFFERING       AMOUNT OF
 SECURITIES TO BE REGISTERED               REGISTERED           SHARE(2)                  PRICE         REGISTRATION FEE
- ------------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                <C>                    <C>                   <C>
Common Stock, $0.0025 par value         1,700,000 shares        $11.375                $19,337,500           $5,705
- ------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  Represents shares issuable upon conversion of, or upon issuance of
     dividends on, the Company's Series F Convertible Preferred Stock.  This
     Registration Statement also covers such indeterminate number of additional
     shares, if any, as shall be issuable from time to time as required by the
     terms of the Series F Convertible Preferred Stock.
(2)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(c), based upon the average of the high and low price
     reported on the Nasdaq National Market on June 4, 1998.

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.

<PAGE>

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

                  SUBJECT TO COMPLETION, DATED JUNE 9, 1998

                       THE IMMUNE RESPONSE CORPORATION
                       1,700,000 SHARES OF COMMON STOCK
                        (PAR VALUE $0.0025 PER SHARE)

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

     This Prospectus covers the public offering, which is not being 
underwritten, of 1,700,000 shares (the "Shares") of Common Stock, $0.0025 par 
value, of The Immune Response Corporation ("Immune Response" or the "Company") 
issuable to certain persons named in this Prospectus (the "Selling 
Stockholders").  The Shares are issuable upon conversion of, or upon issuance 
of dividends on, 200 shares of Series F Convertible Preferred Stock sold by 
the Company to certain accredited investors in a private placement in April 
1998 for gross proceeds of $10,000,000 (the "Private Placement").  The Series 
F Convertible Preferred Stock is convertible into Common Stock initially at a 
conversion price equivalent to $14.07 per share of Common Stock.  At the 
initial conversion price, 710,732 shares of Common Stock are issuable upon 
conversion of the 200 shares of Series F Convertible Preferred Stock.  If 
prior to April 24, 1999 the average of the closing bid prices for the Common 
Stock during any 20 consecutive trading day period subsequent to May 28, 1998, 
and the closing bid price for a share of Common Stock on April 24, 1999 is not 
greater than $14.07, then the conversion price of the Series F Convertible 
Preferred Stock will be adjusted downward on April 24, 1999 (or sooner if the 
Company issues Common Stock at less than $14.07 per share prior to April 24, 
1999) and quarterly thereafter.  The new lower conversion price will be equal 
to the average of the closing bid prices of the Common Stock during the 30 
consecutive trading days immediately preceding the date of adjustment of the 
conversion price unless the conversion price then in effect is lower, in which 
case the conversion price would not be adjusted.  The conversion price of the 
Series F Preferred Stock will also be adjusted for events such as subdivisions 
or combinations of the Common Stock and reorganizations, reclassifications, 
consolidations, merger or sale of the Company.  The Series F Convertible 
Preferred Stock bears a dividend of 7.5% per annum, which is generally payable 
in shares of Common Stock.  The Company is obligated to use its best efforts 
to keep the registration statement, of which this Prospectus is a part, 
effective until the earlier of (i) the date as of which the Selling 
Stockholders may sell all of their Shares without restriction pursuant to Rule 
144(k) promulgated under the Securities Act of 1933 (or successor thereto) or 
(ii) the date on which (A) the Selling Stockholders have sold all their shares 
and (B) none of the shares of Series F Preferred Stock issued in the Private 
Placement is outstanding.

     The Company's Common Stock is traded on the Nasdaq National Market under 
the symbol "IMNR."  On June 9, 1998, the last reported sale price of the 
Company's Common Stock on the Nasdaq National Market was $11.125.

     The Shares are being offered on behalf of the Selling Stockholders, and 
the Company will not receive any proceeds from the offering.  The Shares may 
be sold or distributed from time to time by the Selling Stockholders, or by 
pledgees, donees or transferees of, or other successors in interest to, the 
Selling Stockholders, directly to one or more purchasers (including pledgees) 
or through brokers, dealers or underwriters who may act solely as agents or 
may acquire Shares as principals, at market prices prevailing at the time of 
sale, at prices related to such prevailing market prices, at negotiated 
prices, or at fixed prices, which may be changed.  The distribution of the 
Shares may be effected in one or more of the following methods: (i) ordinary 
brokers' transactions, which may include long or short sales; (ii) 
transactions involving cross or block trades or otherwise on the Nasdaq 
National Market or such other exchange or market on which the Common Stock is 
listed for trading; (iii) purchases by brokers, dealers or underwriters as 
principal and resale by such purchasers for their own accounts pursuant to 
this Prospectus; (iv) "at the market" to or through market makers or into an 
existing market for the Common Stock; (v) in other ways not involving market 
makers or established trading markets, including direct sales to purchasers or 


<PAGE>

sales effected through agents; (vi) through transactions in options, swaps or 
other derivatives (whether exchange-listed or otherwise); or (vii) any 
combination of the foregoing, or by any other legally available means.  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 
Shares in the course of hedging the positions they assume with the Selling 
Stockholders.  The Selling Stockholders or their successors in interest may 
also enter into option or other transactions with broker-dealers that require 
the delivery by such broker-dealers of the Shares, in which Shares may be 
resold thereafter pursuant to this Prospectus.  The Selling Stockholders or 
their successors in interest may also pledge shares as collateral for margin 
accounts and such shares could be resold pursuant to the terms of such 
accounts. See "Plan of Distribution."

     All expenses (estimated to be $60,000) of the registration of the Common 
Stock covered by this Prospectus will be borne by the Company pursuant to a 
preexisting agreement, except that the Company will not pay any Selling 
Stockholder's underwriting discounts or selling commissions.

     The Company will not receive any proceeds from the sale of the Shares.  
The Selling Stockholders and any broker-dealers, agents or underwriters that 
participate with the Selling Stockholders in the distribution of the Shares 
may be determined to be "underwriters" within the meaning of Section 2(11) of 
the Securities Act of 1933, as amended (the "Securities Act"), and any 
commissions received by them and any profit on the sale of the Shares 
purchased by them may be deemed to be underwriting commissions or discounts 
under the Securities Act. See "Selling Stockholders" and "Plan of 
Distribution."

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

     THESE SECURITIES INVOLVE A HIGH DEGREE OF RISK.  SEE "RISK FACTORS"
COMMENCING ON PAGE 5 OF THIS PROSPECTUS.

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

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

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




              The date of this Prospectus is __________, 1998


                                      -2-

<PAGE>

                              AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the 
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in 
accordance therewith files reports, proxy statements and other information 
with the Securities and Exchange Commission (the "Commission"). Such reports, 
proxy statements and other information filed by the Company can be (i) 
inspected and copied at the public reference facilities maintained by the 
Commission at 450 Fifth Street, N.W., Judiciary Plaza, Washington, D.C., and 
at the Commission's Chicago Regional Office, 500 West Madison Street, Chicago, 
Illinois; and New York Regional Office, 7 World Trade Center, New York, New 
York and (ii) accessed via a Web site maintained by the Commission 
(http://www.sec.gov).  Copies of such material can also be obtained from the 
Public Reference Section of the Commission at 450 Fifth Street, N.W., 
Judiciary Plaza, Washington, D.C. 20549 at prescribed rates.

     The Company has filed with the Commission a Registration Statement on 
Form S-3 (Commission File No. 333-___) under the Securities Act, with respect 
to the Common Stock offered hereby (the "Registration Statement"). This 
Prospectus does not contain all of the information set forth in the 
Registration Statement and the exhibits and schedules thereto. For further 
information with respect to the Company and the Common Stock, reference is 
made to the Registration Statement and the exhibits and schedules thereto. 
Statements contained in this Prospectus as to the contents of any contract or 
other document are not necessarily complete, and, in each instance, reference 
is made to the copy of such contract or document filed as an exhibit to the 
Registration Statement, each such statement being qualified in all respects by 
such reference. Copies of the Registration Statement, including all exhibits 
thereto, may be obtained from the Commission's principal office in Washington, 
D.C. upon payment of the fees prescribed by the Commission, or may be examined 
without charge at the offices of the Commission.

                      DOCUMENTS INCORPORATED BY REFERENCE

     The following documents previously filed with the Commission are hereby 
incorporated by reference into this Prospectus:

     1.   The Company's Annual Report on Form 10-K for the year ended December 
31, 1997 (File No. 0-18006);

     2.   The Company's Quarterly Report on Form 10-Q for the quarter ended 
March 31, 1998;

     3.   The Company's Current Report on Form 8-K dated April 24, 1998;

     4.   The description of Immune Response Common Stock set forth in the 
Registration Statement on Form 8-A filed on March 30, 1990; and

     5.   The description of the Preferred Stock Purchase rights for Series E 
Participating Preferred Stock, par value $0.001, set forth in the Registration 
Statement on Form 8-A filed on March 4, 1992.

     All documents subsequently filed by Immune Response pursuant to Section 
13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of the 
offering to which this Prospectus relates shall be deemed to be incorporated 
by reference into this Prospectus and to be part of this Prospectus from the 
date of filing thereof.

     Any statement contained in a document incorporated by reference herein 
shall be deemed to be modified or superseded for purposes of this Prospectus 
and the Registration Statement of which it is a part to the extent that a 
statement contained herein or in any other subsequently filed document which 
also is incorporated herein modifies or replaces such statement.  Any 
statement so modified or superseded shall not be deemed, in its unmodified 
form, to constitute a part of this Prospectus or such Registration Statement.

     Upon written or oral request, the Company will provide without charge to 
each person to whom a copy of this Prospectus is delivered a copy of the 
documents incorporated by reference herein (other than exhibits to such

                                       -3-

<PAGE>

documents unless such exhibits are specifically incorporated by reference 
therein).  Requests should be submitted in writing or by telephone at (760) 
431-7080 to The Immune Response Corporation, at the principal executive 
offices of the Company, 5935 Darwin Court, Carlsbad, California 92008.

                SPECIAL NOTE REGARDING FORWARD-LOOKING INFORMATION

     When used in this Prospectus, the words "intends to," "believes," 
"anticipates," "expects" and similar expressions are intended to identify 
forward-looking statements.  These forward-looking statements are based 
largely on the Company's expectations and are subject to a number of risks and 
uncertainties, certain of which are beyond the Company's control.  For a 
discussion of certain of such risks, see "Risk Factors."  These 
forward-looking statements speak only as of the date of this Prospectus.  The 
Company expressly disclaims any obligation or undertaking to release publicly 
any updates or revisions to any forward-looking statement contained herein to 
reflect any change in the Company's expectations with regard thereto or any 
change in events, conditions or circumstances on which any such statement is 
based.

                                  THE COMPANY

     Immune Response is a biopharmaceutical company developing immune-based 
therapies to induce specific T cell responses for the treatment of HIV, 
autoimmune diseases and cancer.  The Company is conducting clinical trials for 
its immune-based therapies for HIV, rheumatoid arthritis, psoriasis, multiple 
sclerosis, colon cancer and brain cancer and preclinical studies for melanoma 
and prostate cancers.  In addition, the Company is developing a targeted 
delivery technology for gene therapy which is designed to enable the 
intravenous injection of genes for delivery directly to the liver. The 
Company's gene therapy program is currently focused on diseases of the liver 
and is in preclinical studies for the treatment of hemophilia and hepatitis. 
The Company's strategy is to retain ownership of these proprietary 
technologies and to seek corporate collaborations or joint ventures for 
certain disease-specific applications.                                      



                                       -4-

<PAGE>

                                  RISK FACTORS

UNCERTAINTY OF PRODUCT DEVELOPMENT AND CLINICAL TESTING

     The Company has not completed the development of any products and there 
can be no assurance any products will be successfully developed.  The Company 
has been in existence since 1986, and to date only six of its product 
candidates have entered clinical trials.  The Company's potential immune-based 
therapies for HIV, autoimmune disease, cancer and gene therapy products 
currently under development will require significant additional research and 
development efforts and regulatory approvals prior to potential 
commercialization.  To achieve profitable operations, the Company must 
successfully develop, manufacture, introduce and market products.  There can 
be no assurance that any of the Company's potential products will prove to be 
safe and effective in clinical trials, that United States Food and Drug 
Administration ("FDA") or other regulatory approvals will be obtained or that 
such products will achieve market acceptance.

     The Company's potential HIV immune-based therapy, REMUNE, is in a Phase 
III clinical endpoint trial designed to provide evidence of efficacy based on 
clinical endpoints.  There can be no assurance that the results of such 
clinical trial will demonstrate that REMUNE is safe and efficacious or, that 
even if the results of the clinical trial are considered successful by the 
Company, that the FDA will not require the Company to conduct additional large 
scale clinical trials with REMUNE before the FDA will consider approving 
REMUNE for commercial sale.  Failure to successfully complete the Phase III 
clinical endpoint trial in a timely fashion and a failure to obtain FDA 
approval of REMUNE will materially and adversely affect the Company.  There 
can be no assurance that the results of the Phase III trial will be consistent 
with Phase II results.  Even if the results of the Phase III trial are 
consistent with the results of the Phase II trial, there can be no assurance 
that the FDA would approve REMUNE for marketing.  In addition, REMUNE is being 
tested in a Phase II clinical trial in Thailand, in a pediatric Phase I 
clinical trial in the United States and in combination trials with approved 
HIV therapies in the United States and Spain. Failure of these trials to 
demonstrate the safety and effectiveness of REMUNE could have a material 
adverse effect on the regulatory approval process for this potential product.  
The Company's other potential immune-based therapies and gene therapy 
technologies are at a much earlier stage of development than REMUNE.  The 
Company's gene therapy technology and certain of its technologies for the 
treatment of cancer have not yet been tested in humans and there can be no 
assurance that human testing of potential products based on such technologies 
will be permitted by regulatory authorities or, that even if human testing is 
permitted, that products based on such technologies will be developed and 
shown to be safe or efficacious.  Potential immune-based therapies based on 
certain of the Company's autoimmune technologies and certain of its cancer 
technologies are at an early stage of clinical testing and there can be no 
assurance that such products will be shown to be safe, efficacious or receive 
regulatory approval.

     There can be no assurance that the results of the Company's preclinical 
studies and clinical trials will be indicative of future clinical trial 
results. A commitment of substantial resources to conduct time-consuming 
research, preclinical studies and clinical trials, including the REMUNE Phase 
III clinical endpoint trial will be required if the Company is to develop any 
products. Delays in planned patient enrollment in the Company's current 
clinical trials or future clinical trials may result in increased costs, 
program delays or both. There can be no assurance that any of the Company's 
potential products will prove to be safe and effective in clinical trials, 
that FDA or other regulatory approvals will be obtained or that such products 
will achieve market acceptance. Any products resulting from these programs are 
not expected to be successfully developed or commercially available for a 
number of years, if at all.

     There can be no assurance that unacceptable toxicities or side effects 
will not occur at any time in the course of human clinical trials or, if any 
products are successfully developed and approved for marketing, during 
commercial use of the Company's products.  The appearance of any such 
unacceptable toxicities or side effects could interrupt, limit, delay or abort 
the development of any of the Company's products or, if previously approved, 
necessitate their withdrawal from the market.  Furthermore, there can be no 
assurance that disease resistance will not limit the efficacy of potential 
products.


                                       -5-

<PAGE>

ADDITIONAL FINANCING REQUIREMENTS AND ACCESS TO CAPITAL

     The Company will need to raise additional funds to conduct research and 
development, preclinical studies and clinical trials necessary to bring its 
potential products to market and establish manufacturing and marketing 
capabilities. The Company anticipates that in 1998, the REMUNE clinical trials 
will continue to represent a significant portion of the Company's overall 
expenditures.  The Company also anticipates that costs related to the 
development of REMUNE will continue to increase as the Company approaches 
possible commercialization.  The anticipated costs with respect to REMUNE will 
depend on many factors, including the results of interim analyses of the data 
from the Phase III clinical endpoint trial, the availability of third party 
reimbursement for expanded access protocols for REMUNE, the potential for 
accelerated approval and certain other factors which will influence the 
Company's determination of the appropriate continued investment of the 
Company's financial resources in this program.  The Company's future capital 
requirements will depend on many factors, including continued scientific 
progress in its research and development programs, the scope and results of 
preclinical studies and clinical trials, the time and costs involved in 
obtaining regulatory approvals, the costs involved in filing, prosecuting and 
enforcing patent claims, competing technological and market developments, the 
cost of manufacturing scale-up, effective commercialization activities and 
arrangements and other factors not within the Company's control.  The Company 
intends to seek additional funding through public or private financings, 
arrangements with corporate collaborators or other sources.  If funds are 
acquired through collaborations, the Company will likely be required to 
relinquish some or all rights to products that the Company may have otherwise 
developed itself. Adequate funds may not be available when needed or on terms 
acceptable to the Company.  Insufficient funds may require the Company to 
scale back or eliminate some or all of its research and development programs 
or license to third parties products or technologies that the Company would 
otherwise seek to develop itself.  The Company believes that its existing 
resources, including interest thereon will enable the Company to maintain its 
current and planned operations beyond 1998.

PATENTS AND PROPRIETARY TECHNOLOGY

     The Company has filed, or participated as licensee, in the filing of a 
number of patent applications in the United States and many international 
countries.  The Company files applications as appropriate for patents covering 
its products and processes.  The Company has been issued patents, or has 
licensed patents, covering certain aspects of its proposed immune-based 
therapies for HIV, autoimmune disease, cancer and gene therapy technologies. 
The Company's success may depend in part on its ability to obtain patent 
protection for its products and processes.  The Company is aware that a group 
working with Connetics Corporation has received a United States patent related 
to autoimmune disease research that covers technology similar to that used by 
the Company.

     There can be no assurance that the Company will be able to negotiate any 
necessary cross licenses, and if not successful, failure to do so could have a 
negative impact on the Company. There can be no assurance that the Company's 
patent applications will be issued as patents or that any of its issued 
patents, or any patent that may be issued in the future, will provide the 
Company with adequate protection for the covered products, processes or 
technology.

     The patent positions of biotechnology and pharmaceutical companies can be 
highly uncertain, and involve complex legal and factual questions. Therefore, 
the breadth of claims allowed in biotechnology and pharmaceutical patents 
cannot be predicted.  The Company also relies upon unpatented trade secrets 
and know how, and no assurance can be given that others will not independently 
develop substantially equivalent trade secrets or know how.  In addition, 
whether or not the Company's patents are issued, or issued with limited 
coverage, others may receive patents which contain claims applicable to the 
Company's product.  There can be no assurance that any of the Company's 
patents, or any patents issued to the Company in the future, will afford 
meaningful protection against competitors.  Defending any such patent could be 
costly to the Company, and there can be no assurance that the patent would be 
held valid by a court of competent jurisdiction.

     The Company also relies on protecting its proprietary technology in part 
through confidentiality agreements with its corporate collaborators, 
employees, consultants and certain contractors.  There can be no assurance 
that these agreements will not be breached, that the Company will have 
adequate remedies for any breach, or that the Company's trade secrets will not 
otherwise become known or independently discovered by its competitors.


                                       -6-

<PAGE>

     It is possible that the Company's products or processes will infringe, or 
will be found to infringe, patents not owned or controlled by the Company, 
such as the patent owned by Connetics Corporation.  If any relevant claims of 
third-party patents are upheld as valid and enforceable, the Company could be 
prevented from practicing the subject matter claimed in such patents, or would 
be required to obtain licenses or redesign its products or processes to avoid 
infringement.  There can be no assurance that such licenses would be available 
at all or on terms commercially reasonable to the Company or that the Company 
could redesign its products or processes to avoid infringement. Litigation may 
be necessary to defend against claims of infringement, to enforce patents 
issued to the Company or to protect trade secrets.  Such litigation could 
result in substantial costs and diversion of management efforts regardless of 
the results of such litigation and an adverse result could subject the Company 
to significant liabilities to third parties, require disputed rights to be 
licensed or require the Company to cease using such technology.

HISTORY OF OPERATING LOSSES

     As of March 31, 1998, the Company had an accumulated deficit of $161.4 
million.  The Company has not generated revenues from the commercialization of 
any products and expects to incur substantial net operating losses over the 
next several years.  There can be no assurance that the Company will be able 
to generate sufficient product revenue to become profitable at all or on a 
sustained basis.  The Company expects to have quarter-to-quarter fluctuations 
in expenses, some of which could be significant, due to expanded research, 
development and clinical trial activities.

LENGTHY APPROVAL PROCESS AND UNCERTAINTY OF GOVERNMENT REGULATORY REQUIREMENTS

     Clinical testing, manufacture, promotion and sale of the Company's drug 
products are subject to extensive regulation by numerous governmental 
authorities in the United States, principally the FDA, and corresponding state 
and foreign regulatory agencies.  The Company believes that REMUNE and most of 
its other potential immune-based therapies will be regulated by the FDA as 
biological drug products under current regulations of the FDA.  Biological 
products must be shown to be safe, pure and potent (i.e., effective) and are 
subject to the same regulatory requirements as nonbiological products under 
the FDC Act, as amended by the FDA Modernization Act, except that a biological 
product licensed under the Public Health Services Act ("PHS Act") is not 
required to have an approved NDA under the Federal Food, Drug and Cosmetic Act 
("FDC Act").  The FDA Modernization Act directed the FDA to take measures to 
minimize the differences in the review and approval of marketing applications 
for biological and nonbiological products.  The FDA Modernization Act also 
made significant revisions to the statutory requirements with regard to the 
approval of new biological and nonbiological products.  Among other things, 
the FDA Modernization Act established a new statutory program for the approval 
of fast track drugs, streamlined clinical research, and revised the content of 
product approval applications and the FDA review process.  The FDA is required 
to issue regulations and guidelines in order to implement certain of these new 
requirements.  Until the FDA implements these regulations and guidelines, it 
is impossible to predict the impact of the FDA Modernization Act on the review 
and approval of any marketing applications that the Company may submit to the 
FDA. The FDC Act, the PHS Act and other federal and state statutes and 
regulations govern or influence the testing, manufacture, safety, 
effectiveness, labeling, storage, recordkeeping, approval, advertising, 
distribution and promotion of biological prescription drug products.  
Noncompliance with applicable requirements can result in, among other things, 
fines, injunctions, seizure of products, total or partial suspension of 
product marketing, failure of the government to grant premarket approval, 
withdrawal of marketing approvals and criminal prosecution.

     The regulatory process for new therapeutic drug products, including the 
required preclinical studies and clinical testing, is lengthy and expensive 
and there can be no assurance that necessary FDA clearances will be obtained 
in a timely manner, if at all.  There can be no assurance as to the length of 
the clinical trial period or the number of patients the FDA will require to be 
enrolled in the clinical trials in order to establish the safety and efficacy 
of the Company's products.  The Company may encounter significant delays or 
excessive costs in its efforts to secure necessary approvals, and regulatory 
requirements are evolving and uncertain.  Future United States or foreign 
legislative or administrative acts could also prevent or delay regulatory 
approval of the Company's products.  There can be no assurance that the 
Company will be able to obtain the necessary approvals for clinical trials, 
manufacturing or marketing of any of its products under development.  Even if 
commercial regulatory approvals are 


                                       -7-

<PAGE>

obtained, they may include significant limitations on the indicated uses for 
which a product may be marketed.  In addition, a marketed product is subject 
to continual FDA review.  Later discovery of previously unknown problems or 
failure to comply with the applicable regulatory requirements may result in 
restrictions on the marketing of a product or withdrawal of the product from 
the market, as well as possible civil or criminal sanctions.

     The steps required before a biological drug product may be marketed in 
the United States generally include preclinical studies and the filing of an 
IND application with the FDA.  Reports of results of preclinical studies and 
clinical trials for biological drug products are submitted to the FDA in the 
form of a Biologics Licensing Application ("BLA") for approval for marketing 
and commercial shipment.  Submission of a BLA does not assure FDA approval for 
marketing.  The BLA review process may take a number of years to complete, 
although reviews of applications for treatments of AIDS, cancer and other 
life-threatening diseases may be accelerated or expedited.  Failure of the 
Company to receive FDA marketing approval for REMUNE or any of its other 
products under development on a timely basis could have a material adverse 
effect on the Company's business, financial condition and results of 
operations. In addition to obtaining approval for each biological drug 
product, an ELA usually must be filed and approved by the FDA.

     Among the other requirements for BLA approval is the requirement that 
prospective manufacturers conform to the FDA's Good Manufacturing Practices 
("GMP") requirements specifically for biological drugs, as well as for other 
drugs.  In complying with the FDA's GMP requirements, manufacturers must 
continue to expend time, money and effort in production, recordkeeping and 
quality control to assure that the product meets applicable specifications and 
other requirements.  Failure to comply with the FDA's drug GMP requirements 
subjects the manufacturer to possible FDA regulatory action.  There can be no 
assurance that the Company or its contract manufacturers, if any, will be able 
to maintain compliance with the FDA's drug GMP requirements on a continuing 
basis.  Failure to maintain such compliance could have a material adverse 
effect on the Company's business, financial condition and results of 
operations.

     The Company believes its proprietary GeneDrug and cancer treatment 
therapies will likely be regulated as biological products.  As with the 
Company's other potential products, the gene therapy and cancer products will 
be subject to extensive FDA regulation throughout the product development 
process, and there can be no assurance that any of these products will be 
successful at securing the requisite FDA marketing approval on a timely basis, 
if at all.

     The FDA Modernization Act also amended the FDC Act to permit expanded 
access to individuals and larger groups to unapproved new therapeutic and 
diagnostic products.  Although the new law largely codifies existing FDA 
regulations in this area, it expands access to all investigational therapies 
under certain conditions.  Although the FDA has granted expanded access to 
REMUNE for those patients who are ineligible to enroll in the Phase III 
clinical endpoint trial, the FDA has to date not designated expanded access 
protocols for REMUNE as "treatment" protocols. Either expanded access or a 
treatment protocol designation might permit third party reimbursement of some 
of the costs associated with making REMUNE available to patients in such an 
expanded access context.  There can be no assurance that the FDA will 
determine that REMUNE meets all of the FDA's criteria for use of an 
investigational drug for treatment use or that, even if the product is allowed 
for treatment use, that third party payers will provide reimbursement for any 
of the costs of treatment with REMUNE.

     The FDA also has issued regulations to accelerate the approval of or to 
expedite the review of new biological drug products for serious or 
life-threatening illnesses that provide meaningful therapeutic benefit to 
patients over existing treatments.  Under the accelerated approval program, 
the FDA may grant marketing approval for a biological or nonbiological drug 
product earlier than would normally be the case.  In addition to the 
accelerated approval process, the FDA has established procedures designed to 
expedite the development, evaluation and marketing of new therapies intended 
to treat persons with life-threatening and severely debilitating illnesses, 
especially when no satisfactory alternative therapy exists.  In addition, the 
FDA Modernization Act established a new statutory program for the approval of 
fast track drugs, including biological products.  There can be no assurance 
that the FDA will consider REMUNE or any other of the Company's products under 
development to be an appropriate candidate for accelerated approval, expedited 
review or fast track designation.


                                       -8-

<PAGE>

     To market any drug products outside of the United States, the Company is 
also 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.  The 
foreign regulatory approval process includes all of the risks associated with 
obtaining FDA approval set forth above, and approval by the FDA does not 
ensure approval by the health authorities of any other country.

TECHNOLOGICAL CHANGE AND COMPETITION

     The biotechnology industry continues to undergo rapid change and 
competition is intense in the fields of HIV, autoimmune disease, cancer and 
gene therapy, and such competition is expected to increase.  The Company will 
compete with fully integrated pharmaceutical companies, small biotechnology 
companies, universities and research organizations.  There can be no assurance 
that competitors have not or will not succeed in developing technologies and 
products that are more effective than any which have been or are being 
developed by the Company or which would render the Company's technology and 
products obsolete and noncompetitive. Many of the Company's competitors have 
substantially greater experience, financial and technical resources and 
production, marketing and development capabilities than the Company.  
Accordingly, certain of the Company's competitors may succeed in obtaining 
regulatory approval for products more rapidly or effectively than the Company. 
 If the Company commences commercial sales of its products, it will also be 
competing with respect to manufacturing efficiency and sales and marketing 
capabilities, areas in which it currently has no experience.  There can be no 
assurance that competitors will not develop and commercialize more effective 
or affordable products.

DEPENDENCE ON THIRD PARTIES

     The Company's strategy for the research, development and 
commercialization of its products requires entering into various arrangements 
with corporate collaborators, licensors, licensees and others, and the 
Company's commercial success is dependent upon these outside parties 
performing their respective contractual responsibilities, including the 
analysis of the data generated in the Company's clinical trials.  The amount 
and timing of resources such third parties will devote to these activities may 
not be within the control of the Company.  There can be no assurance that such 
parties will perform their obligations as expected and the failure of third 
parties to perform their obligations would have a material adverse effect on 
the Company. Although the Company has collaborative agreements with several 
universities and research institutions, the Company's agreement with Bayer is 
the only collaborative agreement that provides the Company with contract 
revenue.  There can be no assurance that these collaborations will result in 
the development of any commercial products.  Immune Response intends to seek 
additional collaborative arrangements to develop and commercialize certain of 
its products.  There can be no assurance that the Company will be able to 
negotiate collaborative arrangements on favorable terms, or at all, in the 
future, or that its current or future collaborative arrangements will be 
successful.

DEPENDENCE ON KEY PERSONNEL

     Since its inception, Immune Response has relied on the technical and 
management skills of its experienced staff.  The Company does not maintain key 
man life insurance on any of its personnel.  The Company's success also 
depends in large part upon its ability to attract and retain highly qualified 
scientific and management personnel.  The Company faces competition for such 
personnel from other companies, academic institutions, government entities and 
other organizations.  There can be no assurance that the Company will be 
successful in hiring or retaining requisite personnel.

LACK OF COMMERCIAL MANUFACTURING AND MARKETING EXPERIENCE

     The Company has a manufacturing facility for REMUNE located in King of 
Prussia, Pennsylvania, and a pilot manufacturing facility in Carlsbad, 
California for its other products. The Company has not yet manufactured its 
product candidates in commercial quantities.  No assurance can be given that 
the Company, on a timely basis, will be able to make the transition from 
manufacturing clinical trial quantities to commercial production quantities 
successfully or be able to arrange for contract manufacturing.  The Company 
believes it will be able to manufacture 


                                       -9-

<PAGE>

REMUNE for initial commercialization, if the product obtains FDA approval, but 
it has not yet demonstrated the capability to manufacture REMUNE in commercial 
quantities, or its autoimmune disease, cancer and gene therapy treatments in 
large-scale clinical or commercial quantities.  The Company has no experience 
in the sales, marketing and distribution of pharmaceutical products.  There 
can be no assurance that the Company will be able to establish sales, 
marketing and distribution capabilities or make arrangements with its 
collaborators, licensees or others to perform such activities or that such 
efforts will be successful. There can be no assurance of market acceptance of 
the Company's products, if they are developed and approved for 
commercialization.

     The manufacture of the Company's products involves a number of steps and 
requires compliance with stringent quality control specifications imposed by 
the Company itself and by the FDA.  Moreover, the Company's products can only 
be manufactured in a facility that has undergone a satisfactory inspection by 
the FDA.  For these reasons, the Company would not be able quickly to replace 
its manufacturing capacity if it were unable to use its manufacturing 
facilities as a result of a fire, natural disaster (including an earthquake), 
equipment failure or other difficulty, or if such facilities are deemed not in 
compliance with the FDA's drug GMP requirements and the non-compliance could 
not be rapidly rectified. The Company's inability or reduced capacity to 
manufacture its products would have a material adverse effect on the Company's 
business and results of operations.

     The Company may enter into arrangements with contract manufacturing 
companies to expand its own production capacity in order to meet requirements 
for its products, or to attempt to improve manufacturing efficiency.  If the 
Company chooses to contract for manufacturing services and encounters delays 
or difficulties in establishing relationships with manufacturers to produce, 
package and distribute its finished products, clinical trials, market 
introduction and subsequent sales of such products would be adversely 
affected. Further, contract manufacturers must also operate in compliance with 
the FDA's drug GMP requirements; failure to do so could result in, among other 
things, the disruption of product supplies.  Until recently, biologic product 
licenses could not be held by any company unless it performed significant 
manufacturing operations.  The FDA recently amended its regulations in this 
regard, and the Company believes that under these new regulations it can now 
hold licenses for its biological products without performing significant 
manufacturing steps. Nonetheless, the Company's potential dependence upon 
third parties for the manufacture of its products may adversely affect the 
Company's profit margins and its ability to develop and deliver such products 
on a timely and competitive basis.

UNCERTAINTY OF PRODUCT PRICING, REIMBURSEMENT AND RELATED MATTERS

     The Company's ability to earn sufficient returns on its products will 
depend in part on the extent to which reimbursement for the costs of such 
products and related treatments will be available from government health 
administration authorities, private health coverage insurers, managed care 
organizations and other organizations.  Third party payors are increasingly 
challenging the price of medical products and services.  If purchasers or 
users of the Company's products are not able to obtain adequate reimbursement 
for the cost of using such products, they may forego or reduce such use.  
Significant uncertainty exists as to the reimbursement status of newly 
approved health care products, and there can be no assurance that adequate 
third party coverage will be available. Failure to obtain appropriate 
reimbursement would have a material adverse effect on the Company.

PRODUCT LIABILITY EXPOSURE

     The Company faces an inherent business risk of exposure to product 
liability and other claims in the event that the development or use of its 
technology or prospective products is alleged to have resulted in adverse 
effects.  While the Company has taken, and will continue to take, what it 
believes are appropriate precautions, there can be no assurance that it will 
avoid significant liability exposure.  Although the Company currently carries 
product liability insurance for clinical trials, there can be no assurance 
that the Company has sufficient coverage, or can obtain sufficient coverage, 
at a reasonable cost.  An inability to obtain product liability insurance at 
acceptable cost or to otherwise protect against potential product liability 
claims could prevent or inhibit the commercialization of products developed by 
the Company.  A product liability claim could have a material adverse effect 
on the Company's business, financial condition and results of operations.


                                       -10-

<PAGE>

HAZARDOUS MATERIALS/ENVIRONMENTAL MATTERS

     Although the Company does not currently manufacture commercial quantities 
of its product candidates, it produces limited quantities of such products for 
its clinical trials.  The Company's research and development processes involve 
the controlled storage, use and disposal of hazardous materials, biological 
hazardous materials and radioactive compounds.  The Company is subject to 
federal, state and local laws and regulations governing the use, manufacture, 
storage, handling and disposal of such materials and certain waste products. 
Although the Company believes that its safety procedures for handling and 
disposing of such materials comply with the standards prescribed by such laws 
and regulations, the risk of accidental contamination or injury from these 
materials cannot be completely eliminated.  In the event of such an accident, 
the Company could be held liable for any damages that result, and any such 
liability could exceed the resources of the Company.  There can be no 
assurance that the Company will not be required to incur significant costs to 
comply with current or future environmental laws and regulations nor that the 
operations, business or assets of the Company will not be materially or 
adversely affected by current or future environmental laws or regulations.

SUBORDINATION OF COMMON STOCK TO PREFERRED STOCK

     The Company's Common Stock is expressly subordinate to the Company's 
Series F Convertible Preferred Stock in the event of the liquidation, 
dissolution or winding up of the Company.  If the Company were to cease 
operations and liquidate its assets, there can be no assurance that there 
would be any remaining value available for distribution to the holders of 
Common Stock after providing for the Series F Convertible Preferred Stock 
liquidation preference.

VOLATILITY OF STOCK PRICE AND ABSENCE OF DIVIDENDS

     The market price of Immune Response's common stock, like that of the 
common stock of many other biopharmaceutical companies, has been and is likely 
to be highly volatile. Factors such as the results of preclinical studies and 
clinical trials by the Company, its collaborators or its competitors, other 
evidence of the safety or efficacy of products of the Company or its 
competitors, announcements of technological innovations or new products by the 
Company or its competitors, governmental regulatory actions, changes or 
announcements in reimbursement policies, developments with the Company's 
collaborators, developments concerning patent or other proprietary rights of 
the Company or its competitors (including litigation), concern as to the 
safety of the Company's products, period-to-period fluctuations in the 
Company's operating results, changes in estimates of the Company's performance 
by securities analysts, market conditions for biopharmaceutical stocks in 
general and other factors not within the control of the Company could have a 
significant adverse impact on the market price of the common stock.  The 
Company has never paid cash dividends on its common stock and does not 
anticipate paying any cash dividends in the foreseeable future.

EFFECT OF CERTAIN ANTI-TAKEOVER PROVISIONS

     The Company's Certificate of Incorporation and Bylaws include provisions 
that could discourage potential takeover attempts and make attempts by 
stockholders to change management more difficult.  The approval of 66 2/3 
percent of the Company's voting stock is required to approve certain 
transactions and to take certain stockholder actions, including the calling of 
special meetings of stockholders and the amendment of any of the anti-takeover 
provisions contained in the Company's Certificate of Incorporation.  Further, 
pursuant to the terms of its stockholder rights plan, the Company has 
distributed a dividend of one right for each outstanding share of common 
stock. These rights will cause substantial dilution to the ownership of a 
person or group that attempts to acquire the Company on terms not approved by 
the Board of Directors and may have the effect of deterring hostile takeover 
attempts.

                                   USE OF PROCEEDS

     The Company will not receive any proceeds from the sale of the Shares 
offered hereby.


                                       -11-

<PAGE>

                              INCOME TAX CONSIDERATIONS

     Each prospective purchaser should consult his or her own tax advisor with 
respect to the income tax issues and consequences of holding and disposing of 
the Common Stock.










                                       -12-

<PAGE>

                                 SELLING STOCKHOLDERS


     As of May 15, 1998 there were four (4) Selling Stockholders, as set forth 
below.  Share ownership information is based solely upon either information 
furnished to the Company or reports furnished to the Company by the respective 
individuals or entities, as the case may be, pursuant to the rules of the 
Commission:  

<TABLE>
<CAPTION>
                                                                                                         Percentage of
                                                                                                      Common Stock to be
                                                           Shares of Common                            Held After Sale
                                                         Stock Issuable Upon                            Assuming Full
                                                          Conversion of the                             Conversion of
                                                        Series F Convertible                         Series F Convertible
                                                           Preferred Stock          Number of        Preferred Stock and
                                                               Held at            Shares Being             Sale of
              Selling Stockholders                         May 15, 1998(1)         Offered(1)            Common Stock
- ---------------------------------------------------     --------------------      ------------       --------------------
<S>                                                     <C>                       <C>                <C>
Themis Partners L.P.  . . . . . . . . . . . . . . .            167,022               167,022                   0

Heracles Fund . . . . . . . . . . . . . . . . . . .            508,173               508,173                   0

Brown Simpson Strategic Growth Fund, Ltd. . . . . .             28,429                28,429                   0

Brown Simpson Strategic Growth Fund, L.P. . . . . .              7,107                 7,107                   0
</TABLE>

- --------------
(1)  Excludes additional shares of Common Stock which would be issuable to the
     Selling Stockholders upon conversion of the Series F Convertible Preferred
     Stock if the conversion price is adjusted downward pursuant to the terms of
     the Series F Convertible Preferred Stock and excludes shares of Common
     Stock which will be issuable to the Selling Stockholders to pay the
     dividend of 7.5% per annum payable on the Series F Convertible Preferred
     Stock.

     There has been no material relationship between the Selling Stockholders 
and the Company in the past three years except as a result of ownership of 
the Series F Convertible Preferred Stock.

                                 PLAN OF DISTRIBUTION

     The Shares are being offered on behalf of the Selling Stockholders, and 
the Company will not receive any proceeds from the offering.  The Shares may 
be sold or distributed from time to time by the Selling Stockholders, or by 
pledgees, donees or transferees of, or other successors in interest to, the 
Selling Stockholders, directly to one or more purchasers (including pledgees) 
or through brokers dealers or underwriters who may act solely as agents or 
may acquire Shares as principals, at market prices prevailing at the time of 
sale, at prices related to such prevailing market prices, at negotiated 
prices, or at fixed prices, which may be changed.  The distribution of the 
Shares may be effected in one or more of the following methods:  (i) ordinary 
brokers' transactions, which may include long or short sales; (ii) 
transactions involving cross or block trades or otherwise on the Nasdaq 
National Market or such other exchange or market on which the Common Stock is 
listed for trading; (iii) purchases by brokers, dealers or underwriters as 
principal and resale by purchasers for their own accounts pursuant to this 
Prospectus; (iv) "at the market" to or through market makers or into an 
existing market for the Common Shares; (v) in other ways not involving market 
makers or established trading markets, including direct sales to purchasers 
or sales effected through agents; (vi) through transactions in options, swaps 
or other derivatives (whether exchange-listed or otherwise); or (vii) any 
combination of the foregoing, or by any other legally available means.  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 Shares in the course of hedging the positions they assume with the Selling 
Stockholders.  The Selling Stockholders or its successors in interest may 
also enter into option or other transactions with broker-dealers that require 
the delivery by such broker-dealers of the Shares, in which Shares may be 
resold thereafter pursuant to this Prospectus.  The Selling Stockholders or 
their successors in interest may also 


                                       -13-

<PAGE>

pledge shares as collateral for margin accounts and such shares could be 
resold pursuant to the terms of such accounts.

     Brokers, dealers, underwriters or agents participating in the 
distribution of the Shares as agents may receive compensation in the form of 
commissions, discounts or concessions from the Selling Stockholders and/or 
purchasers of the Shares for whom such broker-dealers may act as agent, or to 
whom they may sell as principal, or both (which compensation as to a 
particular broker-dealer may be less than or in excess of customary 
commissions).  The Selling Stockholders and any broker-dealers who act in 
connection with the sale of Shares hereunder may be deemed to be 
"Underwriters" within the meaning of the Securities Act, and any commissions 
they receive and proceeds of any sale of Shares may be deemed to be 
underwriting discounts and commission under the Securities Act.  Neither the 
Company nor the Selling Stockholders can presently estimate the amount of 
such compensation.  The Company knows of no existing arrangement between the 
Selling Stockholders, any other stockholder, broker, dealer, underwriter or 
agent relating to the sale or distribution of the Shares.

     There can be no assurance that any of the Shares will be sold by the 
Selling Stockholders.  To the extent required, (i) the Shares to be sold 
hereby, (ii) the name of the Selling Stockholders, (iii) the purchase price, 
(iv) the name of any such agent, dealer or underwriter, (v) any applicable 
commissions, discounts or other terms constituting compensation with respect 
to a particular offer, (vi) disclosure that such broker or dealer did not 
conduct any investigation to verify information set out or incorporated by 
reference in this Prospectus and (vii) other facts material to the 
transaction will be set forth in an accompanying Prospectus Supplement.

     All expenses (estimated to be $60,000) of the registration of the Common 
Stock covered by this Prospectus will be borne by the Company pursuant to 
preexisting agreements, except that the Company will not pay any Selling 
Stockholder's underwriting discounts or selling commissions.

     The Company has agreed to indemnify the Selling Stockholders against 
certain liabilities in connection with this registration, including 
liabilities under the Securities Act.

     In order to comply with certain states securities laws, if applicable, 
the Common Stock will not be sold in a particular state unless such 
securities have been registered or qualified for sale in such state or any 
exemption from registration or qualification is available and complied with.

                                    LEGAL MATTERS

     Certain legal matters with respect to the validity of the Shares offered 
hereby are being passed upon for the Company by Pillsbury Madison & Sutro 
LLP, San Francisco, California.

                                       EXPERTS

     The consolidated financial statements of Immune Response appearing in 
Immune Response's Annual Report (Form 10-K) for the year ended December 31, 
1997 have been audited by Arthur Andersen LLP, independent auditors, as set 
forth in their report thereon included therein and incorporated herein by 
reference. Such consolidated financial statements are incorporated herein by 
reference in reliance upon the authority of such firms as experts in 
accounting and auditing.


                                       -14-

<PAGE>

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

     No dealer, salesperson or any other person has been authorized to give 
any information or to make any representation not contained in this 
Prospectus in connection with the offer made by 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 an offer to buy any 
securities other than the registered securities to which it relates, or an 
offer in any jurisdiction to any person to whom it is unlawful to make such 
an offer in such jurisdiction. 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 at any time 
subsequent to the date hereof.

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

                                 TABLE OF CONTENTS

                                                                            PAGE

Available Information. . . . . . . . . . . . . . . . . . . . .. . . . . . .  3
Documents Incorporated by Reference. . . . . . . . . . . . . .. . . . . . .  3
Special Note Regarding Forward-looking
  Information. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .  4
The Company. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .  4
Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .  5
Use of Proceeds. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 11
Income Tax Considerations. . . . . . . . . . . . . . . . . . .. . . . . . . 12
Selling Stockholders . . . . . . . . . . . . . . . . . . . . .. . . . . . . 13
Plan of Distribution . . . . . . . . . . . . . . . . . . . . .. . . . . . . 13
Legal Matters. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 14
Experts. . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 14

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


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

                               1,700,000 Shares
                                 Common Stock


                                  THE IMMUNE
                             RESPONSE CORPORATION


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


                               __________, 1998


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

<PAGE>

                                  PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following table sets forth the various expenses in connection with the
sale and distribution of the securities being registered hereby, other than
underwriting discounts and commissions. All amounts are estimated except the
Securities and Exchange Commission registration fee and the Nasdaq National
Market listing fee.

<TABLE>
<CAPTION>
                                                              Amount
                                                             -------
<S>                                                          <C>
SEC registration fee  . . . . . . . . . . . . . . . . . .    $ 5,705
Blue Sky fees and expenses  . . . . . . . . . . . . . . .      1,000
Accounting fees and expenses  . . . . . . . . . . . . . .      5,000
Legal fees and expenses . . . . . . . . . . . . . . . . .     20,000
Registrar and transfer agent's fees . . . . . . . . . . .      1,000
NNM listing fee . . . . . . . . . . . . . . . . . . . . .     17,500
Miscellaneous fees and expenses . . . . . . . . . . . . .      9,795
                                                             -------
     Total                                                   $60,000
                                                             -------
                                                             -------
</TABLE>


ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Section 145 of the Delaware General Corporation Law (the "Delaware GCL") 
permits the Company's board of directors to indemnify any person against 
expenses (including attorneys' fees), judgments, fines and amounts paid in 
settlement actually and reasonably incurred by him in connection with any 
threatened, pending or completed action, suit or proceeding in which such 
person is made a party by reason of his being or having been a director, 
officer, employee or agent of the Company, in terms sufficiently broad to 
permit such indemnification under certain circumstances for liabilities 
(including reimbursement for expenses incurred) arising under the Securities 
Act of 1933, as amended (the "Act"). The Delaware GCL provides that 
indemnification pursuant to its provisions is not exclusive of other rights of 
indemnification to which a person may be entitled under any by-law, agreement, 
vote of stockholders or disinterested directors, or otherwise.

     Article VII of the Company's Restated Certificate of Incorporation, as 
amended, and Article V of the Company's Bylaws, provide for indemnification of 
the Company's directors, officers, employees and other agents to the maximum 
extent permitted by law.

     In addition, the Company has entered into separate indemnification 
agreements with its directors and officers that will require the Company, 
among other things, to indemnify them against certain liabilities that may 
arise by reason of their status or service as directors or officers to the 
fullest extent not prohibited by law.


                                       II-1

<PAGE>

ITEM 16.  EXHIBITS

 Exhibit
 Number                         Description of Document*
- --------   ------------------------------------------------------------------
  5.1      Opinion of Pillsbury Madison & Sutro LLP regarding the legality of
           the securities being registered.

 10.1(1)   Securities Purchase Agreement dated as of April 24, 1998 by and
           among the Company and the Selling Stockholders.

 10.2(1)   Registration Rights Agreement dated as of April 24, 1998 by and
           among the Company and the Selling Stockholders.

  23.1     Consent of independent public accountants.

  23.2     Consent of Pillsbury Madison & Sutro LLP (included in its opinion
           filed as Exhibit 5.1 to this Registration Statement).

  24.1     Power of Attorney (see page II-4).

- -----------
*    Parenthetical references after description of exhibits relate to the
     exhibit number under which exhibits were initially filed.
(1)  Incorporated by reference to the exhibits of the same number to the
     Company's Report on Form 8-K dated April 24, 1998 (Commission File
     No. 0-18006).

ITEM 17.  UNDERTAKINGS

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

     The undersigned Company 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 Act; (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 this Registration
     Statement; and (iii) to include any material information with respect to
     the plan of distribution not previously disclosed in this Registration
     Statement or any material change to such information in this Registration
     Statement; provided, however, that paragraphs (i) and (ii) do not apply if
     the information required to be included in a post-effective amendment by
     those paragraphs is contained in periodic reports filed by the Registrant


                                       II-2

<PAGE>

     pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of
     1934, as amended (the "Exchange Act") that are incorporated by reference in
     this Registration Statement.

          (2)  That, for the purpose of determining any liability under the Act,
     each post-effective amendment that contains a form of prospectus 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.

          (4)  For purposes of determining any liability under the Act, each
     filing of the Registrant's annual report pursuant to Section 13(a) or
     Section 15(d) of the Exchange Act which is incorporated by reference in
     this Registration Statement 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.



                                       II-3

<PAGE>

                                    SIGNATURES
                                    ----------

     Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3, and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Carlsbad, State of California, June 9, 1998.

                                      THE IMMUNE RESPONSE CORPORATION



                                      By         /s/ Dennis J. Carlo          
                                         -------------------------------------
                                                Dennis J. Carlo, Ph.D.        
                                         President and Chief Executive Officer



                                  POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears
below constitutes and appoints Dennis J. Carlo, Ph.D. and Charles J. Cashion and
each of them, his true and lawful attorneys-in-fact and agents, each with full
power of substitution and resubstitution, for him and in his name, place and
stead, in any and all capacities, to sign any and all amendments, including
post-effective amendments, to this Registration Statement, and to file the same,
with exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, 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, as fully to all intents
and purposes as he might or could do in person, hereby ratifying and confirming
all that each of said attorneys-in-fact and agents or their substitute or
substitutes 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:


<TABLE>
<CAPTION>
       Signature                         Title                           Date
       ---------                         -----                           ----
<S>                           <C>                                     <C>
  /s/ Dennis J. Carlo         President, Chief Executive Officer      June 9, 1998
- ---------------------------   and Director (Principal Executive
    Dennis J. Carlo, Ph.D.    Officer)



  /s/ Charles J. Cashion      Senior Vice President, Finance and      June 9, 1998
- ---------------------------   Administration, Chief Financial 
    Charles J. Cashion        Officer, Secretary and Treasurer
                              (Principal Financial and Principal 
                              Accounting Officer)


  /s/ James B. Glavin         Chairman of the Board                   June 9, 1998
- ---------------------------   
    James B. Glavin



                              Director                                June 9, 1998
- ---------------------------   
    Kevin B. Kimberlin                                          



                                       II-4

<PAGE>

<CAPTION>
       Signature                         Title                           Date
       ---------                         -----                           ----
<S>                           <C>                                     <C>

- ---------------------------   Director                                June 9, 1998
   Gilbert S. Omenn                                           


- ---------------------------   Director                                June 9, 1998
    Melvin Perelman                                           


    /s/ John Simon            Director                                June 9, 1998
- ---------------------------   
      John Simon                                              


/s/ William M. Sullivan       Director                                June 9, 1998
- ---------------------------   
  William M. Sullivan                                         


  /s/ Philip M. Young         Director                                June 9, 1998
- ---------------------------   
    Philip M. Young
</TABLE>


                                       II-5

<PAGE>

                                   EXHIBIT INDEX
                                   -------------
<TABLE>
<CAPTION>
 Exhibit
 Number                         Description of Document*
- ---------   ---------------------------------------------------------------
<S>         <C>
   5.1      Opinion of Pillsbury Madison & Sutro LLP regarding the legality
            of the securities being registered.

  10.1(1)   Securities Purchase Agreement dated as of April 24, 1998 by and
            among the Company and the Selling Stockholders.

  10.2(1)   Registration Rights Agreement dated as of April 24, 1998 by and
            among the Company and the Selling Stockholders.

  23.1      Consent of independent public accountants.

  23.2      Consent of Pillsbury Madison & Sutro LLP (included in its
            opinion filed as Exhibit 5.1 to this Registration Statement).

  24.1      Power of Attorney (see page II-4).
</TABLE>

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

(1)  Incorporated by reference to the exhibits of the same number to the
     Company's Report on Form 8-K dated April 24, 1998 (Commission File
     No. 0-18006).


<PAGE>

                                     Exhibit 5.1

                            PILLSBURY MADISON & SUTRO LLP
                                 2550 Hanover Street
                             Palo Alto, California 94304

                                     June 9, 1998


The Immune Response Corporation
5935 Darwin Court
Carlsbad, California 92008

     Re:  Registration Statement on Form S-3

Ladies and Gentlemen:

     We are acting as counsel for The Immune Response Corporation, a Delaware 
corporation (the "Company"), in connection with the registration under the 
Securities Act of 1933, as amended, of 1,700,000 shares of Common Stock, par 
value $0.0025 per share (the "Common Stock"), of the Company to be offered and 
sold by certain stockholders of the Company (the "Selling Stockholders"), 
which are issuable upon conversion of, or upon issuance of dividends on, 200 
shares of the Company's Series F Convertible Preferred Stock (the "Preferred 
Stock").  In this regard we have participated in the preparation of a 
Registration Statement on Form S-3 relating to such shares of Common Stock.  
Such Registration Statement, as amended, is herein referred to as the 
"Registration Statement."

     We are of the opinion that the Common Stock to be offered and sold by the 
Selling Stockholders have been duly authorized and, when issued to the Selling 
Stockholders by the Company in accordance with the terms of the Preferred 
Stock referenced above, will be legally issued, fully paid and nonassessable.

     We hereby consent to the filing of this opinion as Exhibit 5.1 to the 
Registration Statement and to the use of our name under the caption "Legal 
Matters" in the Registration Statement and in the Prospectus included therein.

                                       Very truly yours,

                                       /s/ Pillsbury Madison & Sutro LLP



<PAGE>

                                                                    EXHIBIT 23.1
                                                                    ------------


                      CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


     As independent public accountants, we hereby consent to the incorporation 
by reference in this registration statement of our report dated January 19, 
1998 included in The Immune Response Corporation's Form 10-K for the year 
ended December 31, 1997 and to all references to our Firm included in this 
registration statement.

                                                   Arthur Andersen LLP


San Diego, California
June 9, 1998



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