AVIRON
S-8, 1999-09-16
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1
   As filed with the Securities and Exchange Commission on September 16, 1999
                                                    Registration No. 333-
===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

                                     Aviron
             (Exact name of registrant as specified in its charter)

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

        Delaware                                      77-0309686
(State of Incorporation)                   (I.R.S. Employer Identification No.)

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


    297 North Bernardo Avenue, Mountain View, CA 94043 Phone: (650) 919-6500
                    (Address of principal executive offices)

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

                           1996 Equity Incentive Plan
                           (Full title of the plans)


          J. Leighton Read, M.D., Chairman and Chief Executive Officer

                                     Aviron
    297 North Bernardo Avenue, Mountain View, CA 94043 Phone: (650) 919-6500
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

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

                                   Copies to:
                              Alan Mendelson, Esq.
                            Robert J. Brigham, Esq.
                               Cooley Godward LLP
                             Five Palo Alto Square
                              3000 El Camino Real
                            Palo Alto, CA 94306-2155
                                 (650) 843-5000

                                 ---------------
<PAGE>   2
                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
=====================================================================================================================
                                                     PROPOSED MAXIMUM      PROPOSED MAXIMUM
TITLE OF SECURITIES TO         AMOUNT TO BE          OFFERING PRICE PER    AGGREGATE OFFERING        AMOUNT OF
      BE REGISTERED            REGISTERED                SHARE(1)              PRICE(1)            REGISTRATION FEE
<S>                            <C>                      <C>                 <C>                      <C>
Stock  Options and Common
Stock (par value $.001)        780,000 shares           $28.125             $21,937,500.00           $6,098.63
=====================================================================================================================
</TABLE>



(1)  Estimated solely for the purpose of calculating the amount of the
     registration fee pursuant to Rule 457(c) of the Securities Act of 1933, as
     amended. The registration fee is based on the estimated price of 780,000
     shares available for grant under the 1996 Equity Incentive Plan. The price
     per share and aggregate offering price of the 780,000 shares under the 1996
     Equity Incentive Plan is based upon the average of the high and low prices
     of Registrant's Common Stock on September 14, 1999 as reported on the
     Nasdaq National Market.





                                       2
<PAGE>   3
                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following Registration Statements on Form S-8, filed by Aviron (the
"Company") with the Securities and Exchange Commission on November 27, 1996, SEC
File No. 333-17029, and July 13, 1998, SEC File No. 333-58955 are incorporated
by reference into this Registration Statement.



                                    EXHIBITS
<TABLE>
<CAPTION>

EXHIBIT
NUMBER
- -------
<S>               <C>
5.1               Opinion of Cooley Godward LLP.

10.9              1996 Equity Incentive Plan.

23.1              Consent of Ernst & Young LLP.

23.2              Consent of Cooley Godward LLP is contained in Exhibit 5.1 to
                  this Registration Statement.

24.1              Power of Attorney is contained on the signature pages.

</TABLE>


                                       3
<PAGE>   4

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Mountain View, State of California, on
September 16, 1999.

                                    AVIRON


                                    By /s/ J. LEIGHTON READ
                                      -----------------------------------------
                                       J. Leighton Read, M.D.
                                       Chairman and Chief Executive Officer


                                POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints J. Leighton Read, M.D. and Fred Kurland,
and each or any one of them, his true and lawful attorney-in-fact and agent,
with full power of substitution and resubstitution, for him and in his name,
place and stead, in any and all capacities, to sign any and all amendments
(including post-effective amendments) to this Registration Statement, and to
file the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, 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
connection therewith, 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 or 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.
<TABLE>
<CAPTION>
SIGNATURE                                                 TITLE                                       DATE
<S>                                                       <C>                                         <C>
/s/ J. LEIGHTON READ
- ---------------------------------------------             Chairman and Chief Executive Officer        September 16, 1999
J. Leighton Read, M.D.                                    (Principal Executive Officer)

/s/ FRED KURLAND                                          Senior Vice President and Chief             September 16, 1999
- --------------------------------------------              Financial Officer (Principal Financial
Fred Kurland                                              and Accounting Officer)

/s/ REID W. DENNIS
- --------------------------------------------              Director                                    September 16, 1999
Reid W. Dennis

/s/ PAUL H. KLINGENSTEIN
- --------------------------------------------              Director                                    September 16, 1999
Paul H. Klingenstein

/s/ BERNARD ROIZMAN
- --------------------------------------------              Director                                    September 16, 1999
Bernard Roizman, Sc.D.

/s/ JANE E. SHAW
- --------------------------------------------              Director                                    September 16, 1999
Jane E. Shaw, Ph.D.
</TABLE>




                                       4
<PAGE>   5

                                  EXHIBIT INDEX
<TABLE>
<CAPTION>


EXHIBIT
NUMBER
- -------
<S>               <C>
5.1               Opinion of Cooley Godward LLP.

10.9              1996 Equity Incentive Plan

23.1              Consent of Ernst & Young LLP.

23.2              Consent of Cooley Godward LLP is contained in Exhibit 5.1 to
                  this Registration Statement.

24.1              Power of Attorney is contained on the signature pages.

</TABLE>


                                       5

<PAGE>   1

                                                                     EXHIBIT 5.1

                        [COOLEY GODWARD LLP LETTERHEAD]



September 16, 1999



Aviron
297 North Bernardo Avenue
Mountain View, CA  94043



Ladies and Gentlemen:

You have requested our opinion with respect to certain matters in connection
with the filing by Aviron (the "Company") of a Registration Statement on Form
S-8 (the "Registration Statement") with the Securities and Exchange Commission
covering the offering of up to 780,000 shares of the Company's Common Stock,
$.0001 par value, (the "Shares") pursuant to its 1996 Equity Incentive Plan (the
"Incentive Plan").

In connection with this opinion, we have examined the Registration Statement and
related Prospectuses, your Certificate of Incorporation and By-laws, as amended,
and such other documents, records, certificates, memoranda and other instruments
as we deem necessary as a basis for this opinion. We have assumed the
genuineness and authenticity of all documents submitted to us as originals, the
conformity to originals of all documents submitted to us as copies thereof, and
the due execution and delivery of all documents where due execution and delivery
are a prerequisite to the effectiveness thereof.

On the basis of the foregoing, and in reliance thereon, we are of the opinion
that the Shares, when sold and issued in accordance with the Incentive Plan, the
Registration Statement and related Prospectuses, will be validly issued, fully
paid, and nonassessable (except as to shares issued pursuant to certain deferred
payment arrangements, which will be fully paid and nonassessable when such
deferred payments are made in full).

We consent to the filing of this opinion as an exhibit to the Registration
Statement.

Very truly yours,

COOLEY GODWARD LLP



By: /s/ ROBERT J. BRIGHAM
    --------------------------
    Robert J. Brigham


<PAGE>   1
                                                                    EXHIBIT 10.9
                                     AVIRON

                           1996 EQUITY INCENTIVE PLAN

                              ADOPTED MARCH 6, 1996

                     APPROVED BY STOCKHOLDERS JULY 22, 1996

                AMENDED BY THE BOARD OF DIRECTORS MARCH 12, 1998

               AMENDMENT APPROVED BY THE STOCKHOLDERS JUNE 4, 1998

                AMENDED BY THE BOARD OF DIRECTORS APRIL 12, 1999

               AMENDMENT APPROVED BY THE STOCKHOLDERS JUNE 3, 1999



1.       PURPOSES.

     (a) The purpose of the Plan is to provide a means by which selected
Employees of and Consultants to the Company and its Affiliates may be given an
opportunity to benefit from increases in value of the stock of the Company
through the granting of (i) Incentive Stock Options, (ii) Nonstatutory Stock
Options, (iii) stock bonuses, (iv) rights to purchase restricted stock, and (v)
stock appreciation rights, all as defined below. The Plan is successor to, and
restatement of, the Company's 1992 Stock Option Plan.

     (b) The Company, by means of the Plan, seeks to retain the services of
persons who are now Employees and Directors of or Consultants to the Company, to
secure and retain the services of new Employees and Consultants, and to provide
incentives for such persons to exert maximum efforts for the success of the
Company and its Affiliates.

     (c) The Company intends that the Stock Awards issued under the Plan shall,
in the discretion of the Board or any Committee to which responsibility for
administration of the Plan has been delegated pursuant to subsection 3(c), be
either (i) Options granted pursuant to Section 6 hereof, including Incentive
Stock Options and Nonstatutory Stock Options, (ii) stock bonuses or rights to
purchase restricted stock granted pursuant to Section 7 hereof, or (iii) stock
appreciation rights granted pursuant to Section 8 hereof. All Options shall be
separately designated Incentive Stock Options or Nonstatutory Stock Options at
the time of grant, and in such form as issued pursuant to Section 6, and a
separate certificate or certificates will be issued for shares purchased on
exercise of each type of Option.

2.       DEFINITIONS.

     (a) "AFFILIATE" means any parent corporation or subsidiary corporation,
whether now or hereafter existing, as those terms are defined in Sections 424(e)
and (f) respectively, of the Code.

     (b) "BOARD" means the Board of Directors of the Company.

     (c) "CODE" means the Internal Revenue Code of 1986, as amended.

                                       1.
<PAGE>   2

     (d) "COMMITTEE" means a Committee appointed by the Board in accordance with
subsection 3(c) of the Plan.

     (e) "COMPANY" means Aviron, a Delaware corporation.

     (f) "CONCURRENT STOCK APPRECIATION RIGHT" or "CONCURRENT RIGHT" means a
right granted pursuant to subsection 8(b)(2) of the Plan.

     (g) "CONSULTANT" means any person, including an advisor, engaged by the
Company or an Affiliate to render consulting services and who is compensated for
such services, provided that the term "Consultant" shall not include Directors
who are paid only a director's fee by the Company or who are not compensated by
the Company for their services as Directors.

     (h) "CONTINUOUS STATUS AS AN EMPLOYEE, DIRECTOR OR CONSULTANT" means the
employment or relationship as a Director or Consultant is not interrupted or
terminated. The Board, in its sole discretion, may determine whether Continuous
Status as an Employee, Director or Consultant shall be considered interrupted in
the case of: (i) any leave of absence approved by the Board, including sick
leave, military leave, or any other personal leave; or (ii) transfers between
locations of the Company or between the Company, Affiliates or their successors.

     (i) "COVERED EMPLOYEE" means the chief executive officer and the four (4)
other highest compensated officers of the Company for whom total compensation is
required to be reported to shareholders under the Exchange Act, as determined
for purposes of Section 162(m) of the Code.

     (j) "DIRECTOR" means a member of the Board.

     (k) "EMPLOYEE" means any person, including Officers and Directors, employed
by the Company or any Affiliate of the Company. Neither service as a Director
nor payment of a director's fee by the Company shall be sufficient to constitute
"employment" by the Company.

     (l) "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

     (m) "FAIR MARKET VALUE" means, as of any date, the value of the common
stock of the Company determined as follows:

          (1) If the common stock is listed on any established stock exchange or
a national market system, including without limitation the National Market of
The Nasdaq Stock Market, the Fair Market Value of a share of common stock shall
be the closing sales price for such stock (or the closing bid, if no sales were
reported) as quoted on such system or exchange (or the exchange with the
greatest volume of trading in common stock) on the last market trading day prior
to the day of determination, as reported in the Wall Street Journal or such
other source as the Board deems reliable;

          (2) If the common stock is quoted on The Nasdaq Stock Market (but not
on the National Market thereof) or is regularly quoted by a recognized
securities dealer but selling prices are not reported, the Fair Market Value of
a share of common stock shall be the mean between the bid and asked prices for
the common stock on the last market trading day prior to

                                       2.
<PAGE>   3

the day of determination, as reported in the Wall Street Journal or such other
source as the Board deems reliable;

          (3) In the absence of an established market for the common stock, the
Fair Market Value shall be determined in good faith by the Board.

     (n) "INCENTIVE STOCK OPTION" means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

     (o) "INDEPENDENT STOCK APPRECIATION RIGHT" or "INDEPENDENT RIGHT" means a
right granted pursuant to subsection 8(b)(3) of the Plan.

     (p) "NON-EMPLOYEE DIRECTOR" means a Director who either (i) is not a
current Employee or Officer of the Company or a subsidiary, does not receive
compensation (directly or indirectly) from the Company or its parent or a
subsidiary for services rendered as a consultant or in any capacity other than
as a Director (except for an amount as to which disclosure would not be required
under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act
("Regulation S-K")), does not possess an interest in any transaction as to which
disclosure would be required under Item 404(a) of Regulation S-K and is not
engaged in a business relationship as to which disclosure would be required
under Item 404(b) of Regulation S-K; or (ii) is otherwise considered a
"non-employee director" for purposes of Rule 16b-3.

     (q) "NONSTATUTORY STOCK OPTION" means an Option not intended to qualify as
an Incentive Stock Option.

     (r) "OFFICER" means a person who is an officer of the Company within the
meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

     (s) "OPTION" means a stock option granted pursuant to the Plan.

     (t) "OPTION AGREEMENT" means a written agreement between the Company and an
Optionee evidencing the terms and conditions of an individual Option grant. Each
Option Agreement shall be subject to the terms and conditions of the Plan.

     (u) "OPTIONEE" means a person who holds an outstanding Option.

     (v) "OUTSIDE DIRECTOR" means a Director who either (i) is not a current
employee of the Company or an "affiliated corporation" (within the meaning of
Treasury regulations promulgated under Section 162(m) of the Code), is not a
former employee of the Company or an "affiliated corporation" receiving
compensation for prior services (other than benefits under a tax qualified
pension plan), was not an officer of the Company or an "affiliated corporation"
at any time, and is not currently receiving direct or indirect remuneration from
the Company or an "affiliated corporation" for services in any capacity other
than as a Director, or (ii) is otherwise considered an "outside director" for
purposes of Section 162(m) of the Code.

     (w) "PLAN" means this Aviron 1996 Equity Incentive Plan.

                                       3.
<PAGE>   4

     (x) "RULE 16b-3" means Rule 16b-3 of the Exchange Act or any successor to
Rule 16b-3, as in effect when discretion is being exercised with respect to the
Plan.

     (y) "STOCK APPRECIATION RIGHT" means any of the various types of rights
which may be granted under Section 8 of the Plan.

     (z) "STOCK AWARD" means any right granted under the Plan, including any
Option, any stock bonus, any right to purchase restricted stock, and any Stock
Appreciation Right.

     (aa) "STOCK AWARD AGREEMENT" means a written agreement between the Company
and a holder of a Stock Award evidencing the terms and conditions of an
individual Stock Award grant. Each Stock Award Agreement shall be subject to the
terms and conditions of the Plan.

     (bb) "TANDEM STOCK APPRECIATION RIGHT" or "TANDEM RIGHT" means a right
granted pursuant to subsection 8(b)(1) of the Plan.

3. ADMINISTRATION.

     (a) The Plan shall be administered by the Board unless and until the Board
delegates administration to a Committee, as provided in subsection 3(c). Any
interpretation of the Plan by the Board and any decision by the Board under the
Plan shall be final and binding on all persons.

     (b) The Board shall have the power, subject to, and within the limitations
of, the express provisions of the Plan:

          (1) To determine from time to time which of the persons eligible under
the Plan shall be granted Stock Awards; when and how each Stock Award shall be
granted; whether a Stock Award will be an Incentive Stock Option, a Nonstatutory
Stock Option, a stock bonus, a right to purchase restricted stock, a Stock
Appreciation Right, or a combination of the foregoing; the provisions of each
Stock Award granted (which need not be identical), including the time or times
when a person shall be permitted to receive stock pursuant to a Stock Award;
whether a person shall be permitted to receive stock upon exercise of an
Independent Stock Appreciation Right; and the number of shares with respect to
which a Stock Award shall be granted to each such person.

          (2) To construe and interpret the Plan and Stock Awards granted under
it, and to establish, amend and revoke rules and regulations for its
administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan or in any Stock Award Agreement,
in a manner and to the extent it shall deem necessary or expedient to make the
Plan fully effective.

          (3) To amend the Plan or a Stock Award as provided in Section 14.

          (4) Generally, to exercise such powers and to perform such acts as the
Board deems necessary or expedient to promote the best interests of the Company
which are not in conflict with the provisions of the Plan.

                                       4.
<PAGE>   5

     (c) The Board may delegate administration of the Plan to a committee
composed of not fewer than two (2) members (the "Committee"), all of the members
of which Committee may be, in the discretion of the Board, Non-Employee
Directors and may also be, in the discretion of the Board, Outside Directors. If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board (and references in this Plan to the Board shall thereafter be to
the Committee), subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan. Notwithstanding anything in this Section 3 to the
contrary, at any time the Board or the Committee may delegate to a committee of
one or more members of the Board the authority to grant Stock Awards to eligible
persons who (1) are not then subject to Section 16 of the Exchange Act and/or
(2) are either (i) not then Covered Employees and are not expected to be Covered
Employees at the time of recognition of income resulting from such Stock Award,
or (ii) not persons with respect to whom the Company wishes to avoid the
application of Section 162(m) of the Code.

4.       SHARES SUBJECT TO THE PLAN.

     (a) Subject to the provisions of Section 13 relating to adjustments upon
changes in stock, the stock that may be issued pursuant to Stock Awards shall
not exceed in the aggregate four million thirty thousand (4,030,000) shares of
the Company's common stock. If any Stock Award shall for any reason expire or
otherwise terminate, in whole or in part, without having been exercised in full,
the stock not acquired under such Stock Award shall revert to and again become
available for issuance under the Plan. Shares subject to Stock Appreciation
Rights exercised in accordance with Section 8 of the Plan shall not be available
for subsequent issuance under the Plan.

     (b) The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

5.       ELIGIBILITY.

     (a) Incentive Stock Options and Stock  Appreciation  Rights appurtenant
thereto may be granted only to  Employees.  Stock  Awards  other than  Incentive
Stock Options and Stock Appreciation  Rights appurtenant  thereto may be granted
to Employees, Consultants or Non-Employee Directors.

     (b) A Non-Employee Director shall be eligible for the benefits of the Plan,
provided, however, that any grant to a Non-Employee Director shall not exceed
the lesser of (1) 1% of the shares of Common Stock outstanding on the date of
grant or, (2) 25,000 shares.

     (c) No person shall be eligible for the grant of an Incentive Stock Option
if, at the time of grant, such person owns (or is deemed to own pursuant to
Section 424(d) of the Code) stock possessing more than ten percent (10%) of the
total combined voting power of all classes of stock of the Company or of any of
its Affiliates unless the exercise price of such Option is at least one hundred
ten percent (110%) of the Fair Market Value of such stock at the date of grant
and the Option is not exercisable after the expiration of five (5) years from
the date of grant, or in

                                       5.
<PAGE>   6

the case of a restricted stock purchase award, the purchase price is at least
one hundred percent (100%) of the Fair Market Value of such stock at the date of
grant.

     (d) Subject to the provisions of Section 13 relating to adjustments upon
changes in stock, no person shall be eligible to be granted Options and Stock
Appreciation Rights covering more than three hundred thousand (300,000) (after
giving effect to the one-for-five reverse split of the Company's Common Stock
approved in March, 1996) shares of the Company's common stock in any calendar
year.

     (e)      CONSULTANTS.

          (i) A Consultant shall not be eligible for the grant of a Stock Award
if, at the time of grant, a Form S-8 Registration Statement under the Securities
Act ("Form S-8") is not available to register either the offer or the sale of
the Company's securities to such Consultant because of the nature of the
services that the Consultant is providing to the Company, or because the
Consultant is not a natural person, or as otherwise provided by the rules
governing the use of Form S-8, unless the Company determines both (i) that such
grant (A) shall be registered in another manner under the Securities Act (e.g.,
on a Form S-3 Registration Statement) or (B) does not require registration under
the Securities Act in order to comply with the requirements of the Securities
Act, if applicable, and (ii) that such grant complies with the securities laws
of all other relevant jurisdictions.

          (ii) As of April 7, 1999 Form S-8 generally is available to
consultants and advisors only if (i) they are natural persons; (ii) they provide
bona fide services to the issuer, its parents, its majority-owned subsidiaries
or majority-owned subsidiaries of the issuer's parent; and (iii) the services
are not in connection with the offer or sale of securities in a capital-raising
transaction, and do not directly or indirectly promote or maintain a market for
the issuer's securities.

6.       OPTION PROVISIONS.

     Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:

     (a) TERM. No Option shall be exercisable after the expiration of ten (10)
years from the date it was granted.

     (b) PRICE. The exercise price of each Incentive Stock Option shall be not
less than one hundred percent (100%) of the Fair Market Value of the stock
subject to the Option on the date the Option is granted; the exercise price of a
Nonstatutory Stock Option shall be not less than eighty-five percent (85%) of
the Fair Market Value of the stock subject to the Option on the date the Option
is granted. Notwithstanding the foregoing, an Incentive Stock Option may be
granted with an exercise price lower than that set forth in the preceding
sentence if such Option is granted pursuant to an assumption or substitution for
another option in a manner satisfying the provisions of Section 424(a) of the
Code.

                                       6.
<PAGE>   7


     (c) CONSIDERATION. The purchase price of stock acquired pursuant to an
Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (i) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or the Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other common stock of the Company, (B)
according to a deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other common stock of the
Company) with the person to whom the Option is granted or to whom the Option is
transferred pursuant to subsection 6(d), or (C) in any other form of legal
consideration that may be acceptable to the Board.

     In the case of any deferred payment arrangement, interest shall be payable
at least annually and shall be charged at the minimum rate of interest necessary
to avoid the treatment as interest, under any applicable provisions of the Code,
of any amounts other than amounts stated to be interest under the deferred
payment arrangement. Further, the "par value" of any stock subject to an Option
shall not be payable pursuant to a deferred payment arrangement.

     (d) TRANSFERABILITY. An Incentive Stock Option shall not be transferable
except by will or by the laws of descent and distribution, and shall be
exercisable during the lifetime of the person to whom the Incentive Stock Option
is granted only by such person. A Nonstatutory Stock Option shall not be
transferable except by will, by the laws of descent and distribution or pursuant
to a domestic relations order satisfying the requirements of Rule 16b-3 and any
administrative interpretations or pronouncements thereunder (a "DRO"), and shall
be exercisable during the lifetime of the person to whom the Option is granted
only by such person or any transferee pursuant to a DRO. Notwithstanding the
foregoing, the person to whom the Option is granted may, by delivering written
notice to the Company, in a form satisfactory to the Company, designate a third
party who, in the event of the death of the Optionee, shall thereafter be
entitled to exercise the Option.

     (e) VESTING. The total number of shares of stock subject to an Option may,
but need not, be allotted in periodic installments (which may, but need not, be
equal). The Option Agreement may provide that from time to time during each of
such installment periods, the Option may become exercisable ("vest") with
respect to some or all of the shares allotted to that period, and may be
exercised with respect to some or all of the shares allotted to such period
and/or any prior period as to which the Option became vested but was not fully
exercised. The Option may be subject to such other terms and conditions on the
time or times when it may be exercised (which may be based on performance or
other criteria) as the Board may deem appropriate. The provisions of this
subsection 6(e) are subject to any Option provisions governing the minimum
number of shares as to which an Option may be exercised.

     (f) TERMINATION OF EMPLOYMENT OR RELATIONSHIP AS A DIRECTOR OR CONSULTANT.
In the event an Optionee's Continuous Status as an Employee, Director or
Consultant terminates (other than upon the Optionee's death or disability), the
Optionee may exercise his or her Option (to the extent that the Optionee was
entitled to exercise it at the date of termination) but only within such period
of time ending on the earlier of (i) the date three (3) months after the
termination of the Optionee's Continuous Status as an Employee, Director or
Consultant (or such longer or shorter period specified in the Option Agreement),
or (ii) the expiration of the term of the Option as set forth in the Option
Agreement. If, after termination, the Optionee does not exercise his or her
Option within the time specified in the Option Agreement, the Option shall


                                       7.
<PAGE>   8

terminate, and the shares covered by such Option shall revert to and again
become available for issuance under the Plan.

     An Optionee's Option Agreement may also provide that if the exercise of the
Option following the termination of the Optionee's Continuous Status as an
Employee, Director, or Consultant (other than upon the Optionee's death or
disability) would result in liability under Section 16(b) of the Exchange Act,
then the Option shall terminate on the earlier of (i) the expiration of the term
of the Option set forth in the Option Agreement, or (ii) the tenth (10th) day
after the last date on which such exercise would result in such liability under
Section 16(b) of the Exchange Act. Finally, an Optionee's Option Agreement may
also provide that if the exercise of the Option following the termination of the
Optionee's Continuous Status as an Employee, Director or Consultant (other than
upon the Optionee's death or disability) would be prohibited at any time solely
because the issuance of shares would violate the registration requirements under
the Act, then the Option shall terminate on the earlier of (i) the expiration of
the term of the Option set forth in the first paragraph of this subsection 6(f),
or (ii) the expiration of a period of three (3) months after the termination of
the Optionee's Continuous Status as an Employee, Director or Consultant during
which the exercise of the Option would not be in violation of such registration
requirements.

     (g) DISABILITY OF OPTIONEE. In the event an Optionee's Continuous Status as
an Employee, Director or Consultant terminates as a result of the Optionee's
disability, the Optionee may exercise his or her Option (to the extent that the
Optionee was entitled to exercise it at the date of termination), but only
within such period of time ending on the earlier of (i) the date twelve (12)
months following such termination (or such longer or shorter period specified in
the Option Agreement), or (ii) the expiration of the term of the Option as set
forth in the Option Agreement. If, at the date of termination, the Optionee is
not entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the shares covered by such Option shall revert to and again
become available for issuance under the Plan.

     (h) DEATH OF OPTIONEE. In the event of the death of an Optionee during, or
within a period specified in the Option after the termination of, the Optionee's
Continuous Status as an Employee, Director or Consultant, the Option may be
exercised (to the extent the Optionee was entitled to exercise the Option at the
date of death) by the Optionee's estate, by a person who acquired the right to
exercise the Option by bequest or inheritance or by a person designated to
exercise the option upon the Optionee's death pursuant to subsection 6(d), but
only within the period ending on the earlier of (i) the date twelve (12) months
following the date of death (or such longer or shorter period specified in the
Option Agreement), or (ii) the expiration of the term of such Option as set
forth in the Option Agreement. If, at the time of death, the Optionee was not
entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan. If, after death, the Option is not exercised within
the time specified herein, the Option shall terminate, and the shares covered by
such Option shall revert to and again become available for issuance under the
Plan.

                                       8.
<PAGE>   9

     (i) EARLY EXERCISE. The Option may, but need not, include a provision
whereby the Optionee may elect at any time while an Employee, Director or
Consultant to exercise the Option as to any part or all of the shares subject to
the Option prior to the full vesting of the Option. Any unvested shares so
purchased may be subject to a repurchase right in favor of the Company or to any
other restriction the Board determines to be appropriate.

     (j) RE-LOAD OPTIONS. Without in any way limiting the authority of the Board
or Committee to make or not to make grants of Options hereunder, the Board or
Committee shall have the authority (but not an obligation) to include as part of
any Option Agreement a provision entitling the Optionee to a further Option (a
"Re-Load Option") in the event the Optionee exercises the Option evidenced by
the Option agreement, in whole or in part, by surrendering other shares of
Common Stock in accordance with this Plan and the terms and conditions of the
Option Agreement. Any such Re-Load Option (i) shall be for a number of shares
equal to the number of shares surrendered as part or all of the exercise price
of such Option; (ii) shall have an expiration date which is the same as the
expiration date of the Option the exercise of which gave rise to such Re-Load
Option; and (iii) shall have an exercise price which is equal to one hundred
percent (100%) of the Fair Market Value of the Common Stock subject to the
Re-Load Option on the date of exercise of the original Option. Notwithstanding
the foregoing, a Re-Load Option which is an Incentive Stock Option and which is
granted to a 10% stockholder (as described in subsection 5(c)), shall have an
exercise price which is equal to one hundred ten percent (110%) of the Fair
Market Value of the stock subject to the Re-Load Option on the date of exercise
of the original Option and shall have a term which is no longer than five (5)
years.

     Any such Re-Load Option may be an Incentive Stock Option or a Nonstatutory
Stock Option, as the Board or Committee may designate at the time of the grant
of the original Option; provided, however, that the designation of any Re-Load
Option as an Incentive Stock Option shall be subject to the one hundred thousand
dollar ($100,000) annual limitation on exercisability of Incentive Stock Options
described in subsection 12(d) of the Plan and in Section 422(d) of the Code.
There shall be no Re-Load Options on a Re-Load Option. Any such Re-Load Option
shall be subject to the availability of sufficient shares under subsection 4(a)
and shall be subject to such other terms and conditions as the Board or
Committee may determine which are not inconsistent with the express provisions
of the Plan regarding the terms of Options.

7.       TERMS OF STOCK BONUSES AND PURCHASES OF RESTRICTED STOCK.

     Each stock bonus or restricted stock purchase agreement shall be in such
form and shall contain such terms and conditions as the Board or the Committee
shall deem appropriate. The terms and conditions of stock bonus or restricted
stock purchase agreements may change from time to time, and the terms and
conditions of separate agreements need not be identical, but each stock bonus or
restricted stock purchase agreement shall include (through incorporation of
provisions hereof by reference in the agreement or otherwise) the substance of
each of the following provisions as appropriate:

     (a) PURCHASE PRICE. The purchase price under each restricted stock purchase
agreement shall be such amount as the Board or Committee shall determine and
designate in such agreement but in no event shall the purchase price be less
than eighty-five percent (85%) of the stock's Fair Market Value on the date such
award is made. Notwithstanding the foregoing,

                                       9.
<PAGE>   10

the Board or the Committee may determine that eligible participants in the Plan
may be awarded stock pursuant to a stock bonus agreement in consideration for
past services actually rendered to the Company for its benefit.

     (b) TRANSFERABILITY. No rights under a stock bonus or restricted stock
purchase agreement shall be transferable except by will or the laws of descent
and distribution or pursuant to a qualified domestic relations order satisfying
the requirements of Rule 16b-3 and any administrative interpretations or
pronouncements thereunder, so long as stock awarded under such agreement remains
subject to the terms of the agreement.

     (c) CONSIDERATION. The purchase price of stock acquired pursuant to a stock
purchase agreement shall be paid either: (i) in cash at the time of purchase;
(ii) at the discretion of the Board or the Committee, according to a deferred
payment or other arrangement with the person to whom the stock is sold; or (iii)
in any other form of legal consideration that may be acceptable to the Board or
the Committee in its discretion. Notwithstanding the foregoing, the Board or the
Committee to which administration of the Plan has been delegated may award stock
pursuant to a stock bonus agreement in consideration for past services actually
rendered to the Company or for its benefit.

     (d) VESTING. Shares of stock sold or awarded under the Plan may, but need
not, be subject to a repurchase option in favor of the Company in accordance
with a vesting schedule to be determined by the Board or the Committee.

     (e) TERMINATION OF EMPLOYMENT OR RELATIONSHIP AS A DIRECTOR OR CONSULTANT.
In the event a Participant's Continuous Status as an Employee, Director or
Consultant terminates, the Company may repurchase or otherwise reacquire any or
all of the shares of stock held by that person which have not vested as of the
date of termination under the terms of the stock bonus or restricted stock
purchase agreement between the Company and such person.

8.       STOCK APPRECIATION RIGHTS.

     (a) The Board or Committee shall have full power and authority, exercisable
in its sole discretion, to grant Stock Appreciation Rights under the Plan to
Employees and Consultants. To exercise any outstanding Stock Appreciation Right,
the holder must provide written notice of exercise to the Company in compliance
with the provisions of the Stock Award Agreement evidencing such right. If a
Stock Appreciation Right is granted to an individual who is at the time subject
to Section 16(b) of the Exchange Act (a "Section 16(b) Insider"), the Stock
Award Agreement of grant shall incorporate all the terms and conditions at the
time necessary to assure that the subsequent exercise of such right shall
qualify for the safe-harbor exemption from short-swing profit liability provided
by Rule 16b-3 promulgated under the Exchange Act (or any successor rule or
regulation). Except as provided in subsection 5(d), no limitation shall exist on
the aggregate amount of cash payments the Company may make under the Plan in
connection with the exercise of Stock Appreciation Rights.

     (b) Three types of Stock Appreciation Rights shall be authorized for
issuance under the Plan:

                                      10.
<PAGE>   11

          (1) TANDEM STOCK APPRECIATION RIGHTS. Tandem Stock Appreciation Rights
will be granted appurtenant to an Option, and shall, except as specifically set
forth in this Section 8, be subject to the same terms and conditions applicable
to the particular Option grant to which it pertains. Tandem Stock Appreciation
Rights will require the holder to elect between the exercise of the underlying
Option for shares of stock and the surrender, in whole or in part, of such
Option for an appreciation distribution. The appreciation distribution payable
on the exercised Tandem Right shall be in cash (or, if so provided, in an
equivalent number of shares of stock based on Fair Market Value on the date of
the Option surrender) in an amount up to the excess of (A) the Fair Market Value
(on the date of the Option surrender) of the number of shares of stock covered
by that portion of the surrendered Option in which the Optionee is vested over
(B) the aggregate exercise price payable for such vested shares.

          (2) CONCURRENT STOCK APPRECIATION RIGHTS. Concurrent Rights will be
granted appurtenant to an Option and may apply to all or any portion of the
shares of stock subject to the underlying Option and shall, except as
specifically set forth in this Section 8, be subject to the same terms and
conditions applicable to the particular Option grant to which it pertains. A
Concurrent Right shall be exercised automatically at the same time the
underlying Option is exercised with respect to the particular shares of stock to
which the Concurrent Right pertains. The appreciation distribution payable on an
exercised Concurrent Right shall be in cash (or, if so provided, in an
equivalent number of shares of stock based on Fair Market Value on the date of
the exercise of the Concurrent Right) in an amount equal to such portion as
shall be determined by the Board or the Committee at the time of the grant of
the excess of (A) the aggregate Fair Market Value (on the date of the exercise
of the Concurrent Right) of the vested shares of stock purchased under the
underlying Option which have Concurrent Rights appurtenant to them over (B) the
aggregate exercise price paid for such shares.

          (3) INDEPENDENT STOCK APPRECIATION RIGHTS. Independent Rights will be
granted independently of any Option and shall, except as specifically set forth
in this Section 8, be subject to the same terms and conditions applicable to
Nonstatutory Stock Options as set forth in Section 6. They shall be denominated
in share equivalents. The appreciation distribution payable on the exercised
Independent Right shall be not greater than an amount equal to the excess of (A)
the aggregate Fair Market Value (on the date of the exercise of the Independent
Right) of a number of shares of Company stock equal to the number of share
equivalents in which the holder is vested under such Independent Right, and with
respect to which the holder is exercising the Independent Right on such date,
over (B) the aggregate Fair Market Value (on the date of the grant of the
Independent Right) of such number of shares of Company stock. The appreciation
distribution payable on the exercised Independent Right shall be in cash or, if
so provided, in an equivalent number of shares of stock based on Fair Market
Value on the date of the exercise of the Independent Right.

9.       CANCELLATION AND RE-GRANT OF OPTIONS.

     (a) The Board or the Committee shall have the authority to effect, at any
time and from time to time, (i) the repricing of any outstanding Options and/or
any Stock Appreciation Rights under the Plan and/or (ii) with the consent of any
adversely affected holders of Options and/or Stock Appreciation Rights, the
cancellation of any outstanding Options and/or any Stock Appreciation Rights
under the Plan and the grant in substitution therefor of new Options and/or


                                      11.
<PAGE>   12

Stock Appreciation Rights under the Plan covering the same or different numbers
of shares of stock, but having an exercise price per share not less than:
eighty-five percent (85%) of the Fair Market Value for a Nonstatutory Stock
Option, one hundred percent (100%) of the Fair Market Value in the case of an
Incentive Stock Option or, in the case of an Incentive Stock Option held by a
10% stockholder (as described in subsection 5(c)), not less than one hundred ten
percent (110%) of the Fair Market Value per share of stock on the new grant
date. Notwithstanding the foregoing, the Board or the Committee may grant an
Option and/or Stock Appreciation Right with an exercise price lower than that
set forth above if such Option and/or Stock Appreciation Right is granted as
part of a transaction to which section 424(a) of the Code applies.

     (b) Shares subject to an Option or Stock Appreciation Right canceled under
this Section 9 shall continue to be counted against the maximum award of Options
and Stock Appreciation Rights permitted to be granted pursuant to subsection
5(d) of the Plan. The repricing of an Option and/or Stock Appreciation Right
under this Section 9, resulting in a reduction of the exercise price, shall be
deemed to be a cancellation of the original Option and/or Stock Appreciation
Right and the grant of a substitute Option and/or Stock Appreciation Right; in
the event of such repricing, both the original and the substituted Options and
Stock Appreciation Rights shall be counted against the maximum awards of Options
and Stock Appreciation Rights permitted to be granted pursuant to subsection
5(d) of the Plan. The provisions of this subsection 9(b) shall be applicable
only to the extent required by Section 162(m) of the Code.

10.      COVENANTS OF THE COMPANY.

     (a) During the terms of the Stock Awards, the Company shall keep available
at all times the number of shares of stock required to satisfy such Stock
Awards.

     (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon exercise of the Stock Award; provided,
however, that this undertaking shall not require the Company to register under
the Securities Act of 1933, as amended (the "Securities Act") either the Plan,
any Stock Award or any stock issued or issuable pursuant to any such Stock
Award. If, after reasonable efforts, the Company is unable to obtain from any
such regulatory commission or agency the authority which counsel for the Company
deems necessary for the lawful issuance and sale of stock under the Plan, the
Company shall be relieved from any liability for failure to issue and sell stock
upon exercise of such Stock Awards unless and until such authority is obtained.

11.      USE OF PROCEEDS FROM STOCK.

     Proceeds from the sale of stock pursuant to Stock Awards shall constitute
general funds of the Company.

12.      MISCELLANEOUS.

     (a) The Board shall have the power to accelerate the time at which a Stock
Award may first be exercised or the time during which a Stock Award or any part
thereof will vest

                                      12.
<PAGE>   13

pursuant to subsection 6(e), 7(d) or 8(b), notwithstanding the provisions in the
Stock Award stating the time at which it may first be exercised or the time
during which it will vest.

     (b) Neither an Employee, a Consultant nor any person to whom a Stock Award
is transferred in accordance with the Plan shall be deemed to be the holder of,
or to have any of the rights of a holder with respect to, any shares subject to
such Stock Award unless and until such person has satisfied all requirements for
exercise of the Stock Award pursuant to its terms.

     (c) Nothing in the Plan or any instrument executed or Stock Award granted
pursuant thereto shall confer upon any Employee, Consultant or other holder of
Stock Awards any right to continue in the employ of the Company or any Affiliate
or to continue acting as a Consultant or shall affect the right of the Company
or any Affiliate to terminate the employment of any Employee with or without
notice and with or without cause, or the right to terminate the relationship of
any Consultant pursuant to the terms of such Consultant's agreement with the
Company or Affiliate.

     (d) To the extent that the aggregate Fair Market Value (determined at the
time of grant) of stock with respect to which Incentive Stock Options are
exercisable for the first time by any Optionee during any calendar year under
all plans of the Company and its Affiliates exceeds one hundred thousand dollars
($100,000), the Options or portions thereof which exceed such limit (according
to the order in which they were granted) shall be treated as Nonstatutory Stock
Options.

     (e) The Company may require any person to whom a Stock Award is granted, or
any person to whom a Stock Award is transferred in accordance with the Plan, as
a condition of exercising or acquiring stock under any Stock Award, (1) to give
written assurances satisfactory to the Company as to such person's knowledge and
experience in financial and business matters and/or to employ a purchaser
representative reasonably satisfactory to the Company who is knowledgeable and
experienced in financial and business matters, and that he or she is capable of
evaluating, alone or together with the purchaser representative, the merits and
risks of exercising the Stock Award; and (2) to give written assurances
satisfactory to the Company stating that such person is acquiring the stock
subject to the Stock Award for such person's own account and not with any
present intention of selling or otherwise distributing the stock. The foregoing
requirements, and any assurances given pursuant to such requirements, shall be
inoperative if (i) the issuance of the shares upon the exercise or acquisition
of stock under the Stock Award has been registered under a then currently
effective registration statement under the Securities Act, or (ii) as to any
particular requirement, a determination is made by counsel for the Company that
such requirement need not be met in the circumstances under the then applicable
securities laws. The Company may, upon advice of counsel to the Company, place
legends on stock certificates issued under the Plan as such counsel deems
necessary or appropriate in order to comply with applicable securities laws,
including, but not limited to, legends restricting the transfer of the stock.

     (f) To the extent provided by the terms of a Stock Award Agreement, the
person to whom a Stock Award is granted may satisfy any federal, state or local
tax withholding obligation relating to the exercise or acquisition of stock
under a Stock Award by any of the following means or by a combination of such
means: (1) tendering a cash payment; (2) authorizing the

                                      13.
<PAGE>   14

Company to withhold shares from the shares of the common stock otherwise
issuable to the participant as a result of the exercise or acquisition of stock
under the Stock Award; or (3) delivering to the Company owned and unencumbered
shares of the common stock of the Company.

13.      ADJUSTMENTS UPON CHANGES IN STOCK.

     (a) If any change is made in the stock subject to the Plan, or subject to
any Stock Award, without the receipt of consideration by the Company (through
merger, consolidation, reorganization, recapitalization, reincorporation, stock
dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or other transaction not involving the receipt of consideration by the
Company), the Plan will be appropriately adjusted in the class(es) and maximum
number of shares subject to the Plan pursuant to subsection 4(a) and the maximum
number of shares subject to award to any person during any calendar year
pursuant to subsection 5(d), and the outstanding Stock Awards will be
appropriately adjusted in the class(es) and number of shares and price per share
of stock subject to such outstanding Stock Awards. Such adjustments shall be
made by the Board or the Committee, the determination of which shall be final,
binding and conclusive. (The conversion of any convertible securities of the
Company shall not be treated as a "transaction not involving the receipt of
consideration by the Company".)

     (b) In the event of: (1) a dissolution, liquidation or sale of all or
substantially all of the assets of the Company; (2) a merger or consolidation in
which the Company is not the surviving corporation; or (3) a reverse merger in
which the Company is the surviving corporation but the shares of the Company's
common stock outstanding immediately preceding the merger are converted by
virtue of the merger into other property, whether in the form of securities,
cash or otherwise, then to the extent permitted by applicable law: (i) any
surviving corporation or an Affiliate of such surviving corporation shall assume
any Stock Awards outstanding under the Plan or shall substitute similar Stock
Awards for those outstanding under the Plan, or (ii) such Stock Awards shall
continue in full force and effect. In the event any surviving corporation and
its Affiliates refuse to assume or continue such Stock Awards, or to substitute
similar options for those outstanding under the Plan, then, with respect to
Stock Awards held by persons then performing services as Employees, Directors or
Consultants, the time during which such Stock Awards may be exercised shall be
accelerated and the Stock Awards terminated if not exercised prior to such
event.

14.      AMENDMENT OF THE PLAN AND STOCK AWARDS.

     (a) The Board at any time, and from time to time, may amend the Plan.
However, except as provided in Section 13 relating to adjustments upon changes
in stock, no amendment shall be effective unless approved by the stockholders of
the Company within twelve (12) months before or after the adoption of the
amendment, where the amendment will modify the Plan in any way that would
require stockholder approval in order for the Plan to satisfy the requirements
of Section 422 of the Code or to comply with the requirements of Rule 16b-3 or
any Nasdaq or securities exchange listing requirements (e.g., an increase in the
number of shares available for awards or a change to eligibility for Awards).

                                      14.
<PAGE>   15

     (b) The Board may in its sole discretion submit any other amendment to the
Plan for stockholder approval, including, but not limited to, amendments to the
Plan intended to satisfy the requirements of Section 162(m) of the Code and the
regulations promulgated thereunder regarding the exclusion of performance-based
compensation from the limit on corporate deductibility of compensation paid to
certain executive officers.

     (c) It is expressly contemplated that the Board may amend the Plan in any
respect the Board deems necessary or advisable to provide eligible Employees or
Consultants with the maximum benefits provided or to be provided under the
provisions of the Code and the regulations promulgated thereunder relating to
Incentive Stock Options and/or to bring the Plan and/or Incentive Stock Options
granted under it into compliance therewith.

     (d) Rights and obligations under any Stock Award granted before amendment
of the Plan shall not be impaired by any amendment of the Plan unless (i) the
Company requests the consent of the person to whom the Stock Award was granted
and (ii) such person consents in writing.

     (e) The Board at any time, and from time to time, may amend the terms of
any one or more Stock Award; provided, however, that the rights and obligations
under any Stock Award shall not be impaired by any such amendment unless (i) the
Company requests the consent of the person to whom the Stock Award was granted
and (ii) such person consents in writing.

15.      TERMINATION OR SUSPENSION OF THE PLAN.

     (a) The Board may suspend or terminate the Plan at any time. Unless sooner
terminated, the Plan shall terminate ten (10) years from the date the Plan is
adopted by the Board or approved by the stockholders of the Company, whichever
is earlier. No Stock Awards may be granted under the Plan while the Plan is
suspended or after it is terminated.

     (b) Rights and obligations under any Stock Award granted while the Plan is
in effect shall not be impaired by suspension or termination of the Plan, except
with the consent of the person to whom the Stock Award was granted.

16.      EFFECTIVE DATE OF PLAN.

     The Plan shall become effective as determined by the Board, but no Stock
Awards granted under the Plan shall be exercised unless and until the Plan has
been approved by the stockholders of the Company, which approval shall be within
twelve (12) months before or after the date the Plan is adopted by the Board.


                                      15.

<PAGE>   1

                                  EXHIBIT 23.1

               Consent of Ernst & Young LLP, Independent Auditors

We consent to the incorporation by reference in the Registration Statement (Form
S-8) pertaining to the 1996 Equity Incentive Plan of Aviron of our report dated
February 17, 1999, with respect to the financial statements of Aviron for the
year ended December 31, 1998 included in its Annual Report on Form 10-K, filed
with the Securities and Exchange Commission.

/S/ ERNST & YOUNG LLP
Palo Alto, California

September 15, 1999





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