AVIRON
10-Q, 1998-11-16
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1
================================================================================

 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
 
                            ------------------------
 
                                   FORM 10-Q
 
                            ------------------------
 
(MARK ONE)
[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
     SECURITIES EXCHANGE ACT OF 1934
 
               FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1998
 
                                       OR
 
[ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
      SECURITIES EXCHANGE ACT OF 1934
 
         FOR THE TRANSITION PERIOD FROM ____________ TO ____________ .
 
                        COMMISSION FILE NUMBER: 0-20815
 
                                     AVIRON
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                            <C>
                  DELAWARE                                      77-0309686
       (STATE OR OTHER JURISDICTION OF                       (I.R.S. EMPLOYER
       INCORPORATION OR ORGANIZATION)                       IDENTIFICATION NO.)
</TABLE>
 
           297 NORTH BERNARDO AVENUE, MOUNTAIN VIEW, CALIFORNIA 94043
          (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES INCLUDING ZIP CODE)
 
                                 (650) 919-6500
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)
   (FORMER NAME, FORMER ADDRESS AND FORMER FISCAL YEAR, IF CHANGED SINCE LAST
                                    REPORT)
 
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [X]  No [ ]
 
     Indicate the number of shares outstanding of each of the issuer's classes
of common stock, as of the latest practicable date.
 
<TABLE>
<S>                                            <C>
        Common Stock $.001 par value                         15,718,991 shares
                   (Class)                           (Outstanding at November 4, 1998)
</TABLE>
 
================================================================================
<PAGE>   2
 
                                     AVIRON
 
                               TABLE OF CONTENTS
 
                         PART I. FINANCIAL INFORMATION
 
<TABLE>
<CAPTION>
                                                                       PAGE
                                                                       ----
<S>      <C>                                                           <C>
ITEM 1.  FINANCIAL STATEMENTS (Unaudited)............................    3
         Condensed Balance Sheets as of September 30, 1998 and
         December 31, 1997...........................................    3
         Condensed Statements of Operations for the three and
         nine-month periods ended September 30, 1998 and 1997........    4
         Condensed Statements of Cash Flows for the nine-month
         periods ended September 30, 1998 and 1997...................    5
         Notes to Condensed Financial Statements.....................    6
ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
         AND RESULTS OF OPERATIONS...................................    7
</TABLE>
 
                           PART II. OTHER INFORMATION
 
<TABLE>
<S>      <C>                                                           <C>
ITEM 1.  LEGAL PROCEEDINGS...........................................   12
ITEM 2.  CHANGES IN SECURITIES.......................................   12
ITEM 3.  DEFAULTS UPON SENIOR SECURITIES.............................   12
ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.........   12
ITEM 5.  OTHER INFORMATION...........................................   12
SIGNATURES...........................................................   13
EXHIBIT INDEX........................................................   14
</TABLE>
 
                                        2
<PAGE>   3
 
                         PART I. FINANCIAL INFORMATION
 
ITEM 1. FINANCIAL STATEMENTS
 
                                     AVIRON
 
                            CONDENSED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                              SEPTEMBER 30,    DECEMBER 31,
                                                                  1998             1997
                                                              -------------    ------------
                                                               (UNAUDITED)       (NOTE 1)
<S>                                                           <C>              <C>
CURRENT ASSETS:
  Cash and cash equivalents.................................    $  44,316        $ 15,239
  Short-term investments....................................       55,986          47,285
  Prepaid expenses and other current assets.................        1,055           1,030
                                                                ---------        --------
          Total Current Assets..............................      101,357          63,554
  Long-term investments.....................................       11,584          12,587
  Property and equipment, net...............................       17,149           7,582
  Debt issuance costs, deposits and other assets............        5,728           1,602
                                                                ---------        --------
          TOTAL ASSETS......................................    $ 135,818        $ 85,325
                                                                =========        ========
 
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
  Accounts payable..........................................    $   5,185        $  3,636
  Accrued compensation......................................          348             756
  Accrued clinical trial costs..............................          540           3,592
  Accrued interest..........................................        2,891              --
  Accrued expenses and other liabilities....................          938             513
  Current portion of capital lease obligations..............          378             477
                                                                ---------        --------
          Total Current Liabilities.........................       10,280           8,974
  Deferred rent.............................................          484              88
  Capital lease obligations, noncurrent.....................          246             521
  Long-term debt............................................      100,000              --
                                                                ---------        --------
          Total Long-Term Liabilities.......................      100,730             609
                                                                ---------        --------
STOCKHOLDERS' EQUITY:
  Preferred stock, $0.001 par value; 5,000,000 shares
     authorized, issuable in series; none outstanding at
     September 30, 1998 and December 31, 1997...............           --              --
  Common stock, $0.001 par value; 30,000,000 shares
     authorized; 15,716,974 and 16,082,476 shares issued and
     outstanding at September 30, 1998 and December 31,
     1997, respectively.....................................           16              16
  Additional paid-in capital................................      130,228         142,840
  Notes receivable from stockholders........................         (115)           (115)
  Deferred compensation.....................................         (281)           (588)
  Accumulated deficit.......................................     (105,040)        (66,411)
                                                                ---------        --------
          Total Stockholders' Equity........................       24,808          75,742
                                                                ---------        --------
          TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY........    $ 135,818        $ 85,325
                                                                =========        ========
</TABLE>
 
                            See accompanying notes.
 
                                        3
<PAGE>   4
 
                                     AVIRON
 
                       CONDENSED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                   THREE MONTHS ENDED      NINE MONTHS ENDED
                                                      SEPTEMBER 30,          SEPTEMBER 30,
                                                   -------------------    --------------------
                                                     1998       1997        1998        1997
                                                   --------    -------    --------    --------
<S>                                                <C>         <C>        <C>         <C>
TOTAL REVENUES:..................................  $    107    $    32    $    494    $    446
OPERATING EXPENSES:
  Research and development.......................    12,469      5,119      33,126      14,016
  Marketing, general and administrative..........     2,673      1,677       7,325       4,298
                                                   --------    -------    --------    --------
          TOTAL OPERATING EXPENSES...............    15,142      6,796      40,451      18,314
                                                   --------    -------    --------    --------
LOSS FROM OPERATIONS.............................   (15,035)    (6,764)    (39,957)    (17,868)
OTHER INCOME/(EXPENSE):
  Interest income................................     1,668        712       4,468       1,289
  Interest expense...............................    (1,606)       (43)     (3,267)       (141)
                                                   --------    -------    --------    --------
          TOTAL OTHER INCOME, NET................        62        669       1,201       1,148
                                                   --------    -------    --------    --------
NET LOSS.........................................  $(14,973)   $(6,095)   $(38,756)   $(16,720)
                                                   ========    =======    ========    ========
Basic net loss per share.........................  $  (0.95)   $ (0.43)   $  (2.46)   $  (1.30)
                                                   ========    =======    ========    ========
Shares used in computing basic net loss per
  share..........................................    15,643     14,350      15,739      12,932
</TABLE>
 
                            See accompanying notes.
 
                                        4
<PAGE>   5
 
                                     AVIRON
 
                       CONDENSED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                               NINE MONTHS ENDED
                                                                 SEPTEMBER 30,
                                                              --------------------
                                                                1998        1997
                                                              --------    --------
<S>                                                           <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss....................................................  $(38,756)   $(16,720)
Adjustment to reconcile net loss to net cash used in
  operating activities:
  Depreciation and amortization.............................     1,918         477
  Amortization of debt issuance costs.......................       279          --
  Amortization of deferred compensation.....................       307         504
Changes in assets and liabilities:
  Accounts receivable.......................................        29         471
  Prepaid expenses and other current assets.................       (54)        142
  Deposits and other assets.................................      (405)       (421)
  Accounts payable..........................................     1,549       1,441
  Accrued expenses and other liabilities....................      (144)       (452)
  Deferred rent.............................................       396          --
                                                              --------    --------
Net Cash Used in Operating Activities.......................   (34,881)    (14,558)
                                                              --------    --------
Cash Flows From Investing Activities:
  Purchases of investments..................................   (55,305)    (38,168)
  Maturities of investments.................................    47,734       8,952
  Expenditures for property and equipment...................   (11,485)       (689)
                                                              --------    --------
Net Cash Used in Investing Activities.......................   (19,056)    (29,905)
                                                              --------    --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Principal payments on capital lease obligation............      (374)       (464)
  Proceeds from convertible debt offering, net..............    96,000          --
  Repurchase of Common Stock................................   (13,337)         --
  Proceeds from issuance of Common Stock, net...............       725      83,096
                                                              --------    --------
Net Cash Provided by Financing Activities...................    83,014      82,632
                                                              --------    --------
Net Increase in Cash and Cash Equivalents...................    29,077      38,169
Cash and Cash Equivalents at Beginning of Period............    15,239      12,166
                                                              --------    --------
CASH AND CASH EQUIVALENTS AT END OF PERIOD..................  $ 44,316    $ 50,335
                                                              ========    ========
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING AND INVESTING
  ACTIVITIES:
Equipment acquired under lease line of credit...............        --         153
Deferred compensation related to grant of certain stock
  options, less
  cancellations.............................................        14         125
Warrant issued in lieu of payment of legal fees.............        --         100
</TABLE>
 
                            See accompanying notes.
 
                                        5
<PAGE>   6
 
                                     AVIRON
 
                    NOTES TO CONDENSED FINANCIAL STATEMENTS
                         SEPTEMBER 30, 1998 (UNAUDITED)
 
 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Basis of Presentation
 
     The accompanying unaudited condensed financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Form 10-Q and Article 10 of
Regulation S-X.
 
     The financial information at September 30, 1998 and for the three months
and nine months ended September 30, 1998 and 1997 is unaudited, but includes all
adjustments (consisting only of normal recurring adjustments) which Aviron (the
"Company") considers necessary for a fair presentation of the financial position
at such date and the operating results and cash flows for those periods. The
balance sheet data at December 31, 1997 is derived from audited financial
statements at that date. The accompanying condensed financial statements should
be read in conjunction with the financial statements and notes thereto for the
year ended December 31, 1997 included in the Company's Annual Report on Form
10-K for the year ended December 31, 1997. The results of the Company's
operations for any interim period are not necessarily indicative of the results
of the Company's operations for a full fiscal year.
 
 2. NET LOSS PER SHARE
 
     Effective December 31, 1997, the Company adopted Statement of Financial
Accounting Standards No. 128 "Earnings Per Share" ("SFAS 128"). SFAS 128
requires the presentation of basic earnings (loss) per share and diluted
earnings per share, if more dilutive, for all periods presented. Basic net loss
per share is computed using the weighted average number of common shares
outstanding during the period. Diluted net loss per share has not been presented
separately as, given the Company's net loss position, the result would be
anti-dilutive.
 
 3. CHANGES IN SECURITIES
 
     In March 1998, the Company issued $100.0 million of 5 3/4% Convertible
Subordinated Notes due 2005 (the "Notes"). The net proceeds to the Company from
the Note offering were approximately $96.0 million. Of the net proceeds,
approximately $13.3 million was used to repurchase 530,831 shares of Aviron
Common Stock formerly held by Sang-A Pharm. Co., Ltd., a subsidiary of the Hanbo
Group, a Korean pharmaceutical company then under court-ordered reorganization.
The Notes are convertible into shares of common stock at the option of the Note
holders at a price per share of $30.904.
 
 4. NEW ACCOUNTING PRONOUNCEMENT
 
     As of January 1, 1998, the Company adopted Statement of Financial
Accounting Standards No. 130, Reporting Comprehensive Income ("Statement 130").
Statement 130 establishes rules for the reporting of comprehensive income (loss)
and its components, accordingly the adoption of this Statement had no impact on
the Company's net loss or stockholders' equity. Comprehensive income (loss) has
not been presented separately herein as it approximates the Company's net loss.
 
                                        6
<PAGE>   7
 
ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
       OF OPERATIONS
 
     The following Management's Discussion and Analysis of Financial Condition
and Results of Operations contains, in addition to historical information,
forward-looking statements which involve risks and uncertainties. The Company's
actual results could differ materially from those anticipated in these
forward-looking statements as a result of certain factors, including those set
forth in the Company's Annual Report on Form 10-K in the section entitled
"Business Risks."
 
OVERVIEW
 
     Since its inception in April 1992, Aviron has devoted the majority of its
resources to its research and development programs. To date, Aviron has not
generated any revenues from the sale of products and does not expect to generate
any such revenues until at least late in the year 2000, if at all. Aviron has
incurred cumulative net losses of approximately $105.0 million as of September
30, 1998, and it expects to incur increasing operating losses over at least the
next few years.
 
     Aviron has financed its operations through proceeds from private placements
of Preferred Stock, two public offerings and a private placement of Common
Stock, a private placement of convertible subordinated notes ("Notes"), revenue
from its collaborative agreements, equipment lease financings and investment
income earned on cash, cash equivalent balances and marketable securities.
 
     The Company expects its research and development expenditures to increase
substantially over the next several years as the Company expands its research
and development efforts and preclinical testing and clinical trials with respect
to certain of its programs. In addition, marketing, general and administrative
expenses are expected to continue to increase as the Company expands its
operations and prepares for the launch of FLUMIST(TM).
 
     On June 30, 1998 Aviron submitted its first Product License
Application/Establishment License Application (PLA/ELA) to the U.S. Food and
Drug Administration for FLUMIST(TM), the Company's investigational intranasal
influenza vaccine. On August 31, Aviron announced that it had received notice
from the FDA that its submission was not accepted for filing due to lack of data
on manufacturing, validation and stability. These developments make it highly
unlikely that FLUMIST(TM) will be available for the 1999/2000 flu season. Aviron
intends to resubmit applications for U.S. licensure for FLUMIST(TM) to prevent
influenza and its complications in children and adults. Epidemic influenza
affects approximately 10-20 percent of the United States population each year,
resulting in 35-50 million cases of the illness and approximately 20,000 deaths.
 
     Aviron has tested FLUMIST(TM) in approximately 5500 individuals as part of
a Collaborative Research and Development Agreement (CRADA) between Aviron and
the National Institute of Allergy and Infectious Disease (NIAID), a division of
the National Institutes of Health (NIH). The NIAID conducts and supports
research to prevent, diagnose, and treat infectious and immunologic diseases and
has a major responsibility within the federal government for developing vaccines
to control and prevent infectious and immunologic diseases. NIH is an agency of
the U.S. Department of Health and Human Services.
 
     A pivotal Phase 3 clinical trial published in the May 14, 1998 edition of
the New England Journal of Medicine (NEJM) demonstrated a 93 percent protection
rate by FLUMIST(TM) against culture-confirmed influenza. Data from the first
year of this two-year, double-blind, placebo-controlled trial showed that 14 of
1070 children (1 percent) vaccinated with FLUMIST(TM) experienced
culture-confirmed influenza, while 95 of 532 children (18 percent) in the
placebo group developed influenza. In the few children in the FLUMIST(TM) group
who had influenza, the spectrum of illness was milder than that in the control
group.
 
     In the study published in the NEJM, one child out of the 1070 (0.1 percent)
vaccinated with FLUMIST(TM) contracted influenza-related otitis media, while 20
of 532 (4 percent) of the placebo recipients developed the condition, a 98
percent reduction of influenza-associated otitis media (ear infections). When
all cases of otitis media were considered (whether associated with influenza
diagnosis or not), the rate of febrile otitis media (ear infections with fever)
was 30 percent lower among those who received the FLUMIST(TM) vaccine and
resulting antibiotic use was cut by 35 percent. Otitis media is responsible for
over one-third of all visits to
 
                                        7
<PAGE>   8
 
pediatricians' offices each year. Antibiotics are often used to treat otitis
media and the widespread use of antibiotics is a major medical concern among
health professionals.
 
     In September 1998, new data was presented from the second year of this
trial. The data showed that FLUMIST(TM) provided 86 percent protection against
A/Sydney, an unexpected variant which was the predominant strain of flu
circulating during last year's flu season, and 87 percent protection against all
culture-confirmed influenza. The new data also indicated that FLUMIST(TM)
provided 94 percent protection against influenza-related otitis media and 100
percent protection against influenza-related lower respiratory tract disease.
Study data was presented at the 1998 Interscience Conference on Antimicrobial
Agents and Chemotherapy (ICAAC).
 
     In another study among healthy adults, subjects receiving FLUMIST(TM)
experienced an 85 percent protection rate against laboratory-documented
influenza. Aviron has an additional large multi-center double-blind,
placebo-controlled study underway to evaluate the benefits of FLUMIST(TM) in
reducing work loss and health care utilization in adults. In studies with
FLUMIST(TM), no serious adverse events associated with the vaccine were
reported. A minority of recipients reported transient cold-like symptoms such as
runny nose or sore throat. In a separate study, elderly high risk adults (those
with conditions such as diabetes, chronic obstructive pulmonary disease or
congestive heart failure) received FLUMIST(TM) co-administered with an
inactivated vaccine (flu shot). The vaccine was well-tolerated, with the most
common symptom being transient sore throat.
 
     Data on a study of FLUMIST(TM) in 4561 healthy working adults is expected
to be presented at the International Symposium on Influenza and Other
Respiratory Viruses in December 1998. The symposium is sponsored by the
International Association for Antiviral Research and the National Institute of
Allergy and Infectious Diseases, a unit of the National Institutes of Health.
 
     During August 1998, dosing of FLUMIST(TM) began in a large clinical trial
to assess the impact of community-wide pediatric influenza immunization. The
three-year trial, taking place in Temple, Texas, is eventually expected to
enroll up to 15,000 children. It is funded by a $3 million grant from the
National Institute of Allergy and Infectious Diseases of the National Institutes
of Health awarded to the Baylor College of Medicine. The trial will evaluate the
impact of vaccinating preschool and school-age children with FLUMIST(TM) on the
incidence of doctor visits for flu-related illnesses and on the impact of these
vaccinations on the incidence of flu-like illness in other segments of the
population.
 
     In October 1998, the Cooperative Studies program of the Department of
Veterans Affairs Office of Research and Development began a clinical trial to
evaluate the potential additional benefit of co-administration of FLUMIST(TM)
with the flu shot, compared to the flu shot alone, in high-risk patients with
chronic lung disease. Volunteers in this trial, which is co-sponsored by the
Company and the VA, will be aged 50 or older with underlying chronic obstructive
pulmonary disease and emphysema. The one-year study is planned to involve
approximately 4000 volunteers at 20 participating VA medical centers nationwide.
 
     In April 1997, the Company entered into an agreement with Evans Medical
Limited, a subsidiary of Medeva plc for the commercial manufacture of
FLUMIST(TM) through December 2001. In July 1998, Evans Medical Limited changed
its name to Medeva Pharma Limited ("Medeva Pharma"). In October 1997, the
Company entered into an agreement with Packaging Coordinators, Inc., a
subsidiary of Cardinal Health, Inc. ("PCI") for the blending, filling, packaging
and labeling of FLUMIST(TM) in the United States until October 2004. On July 15,
Aviron and PCI opened a 34,000-square-foot manufacturing suite in Philadelphia
at PCI's site, in which PCI has blended, filled and packaged doses of
FLUMIST(TM) for use in 1998-99 clinical trials. Upon receipt of regulatory
approval, the PCI facility will be used for blending, filling, packaging,
labeling and final shipment of FLUMIST(TM). The agreements with Medeva Pharma
and PCI have required the Company to fund the construction of facilities,
improvements, and equipment and will continue to require the Company to incur
expenses for the duration of the agreements for facility space, utilities and
insurance. The Company currently is evaluating the costs and benefits of
developing internal manufacturing capabilities or contracting for expanded or
alternative sources of supply from third-party manufacturers.
 
                                        8
<PAGE>   9
 
     In June 1998, the Company announced the signing of an agreement with CSL
Limited, a recognized leader in influenza vaccines, to develop, sell and
distribute FLUMIST(TM) in Australia, New Zealand and certain countries in the
south Pacific region. Under the agreement, CSL and Aviron will jointly carry out
additional trials in Australia for Aviron's cold adapted FLUMIST(TM) intranasal
influenza vaccine.
 
     In August 1998, Aviron announced the signing of a worldwide multiyear
supply agreement with Becton Dickinson and Company, in which Becton Dickinson
will supply its AccuSpray(TM) non-invasive nasal spray delivery system for
administration of FLUMIST(TM). Under terms of the supply agreement, Becton
Dickinson will supply the delivery system exclusively to Aviron through the
2001-2002 flu season.
 
     In August, 1998 the Company announced receipt of a Small Business
Innovation Research (SBIR) grant from the NIAID to support development of its
live attenuated vaccine for the prevention of disease caused by human
cytomegalovirus (CMV). The $750,000 grant is the second that Aviron has received
for research on CMV. The award will be used to produce recombinant CMV vaccine
candidates for human testing and to determine their safety and immunogenicity in
a Phase 1 clinical trial in collaboration with the NIAID Vaccine Treatment and
Evaluation Unit network.
 
     CMV is the most common viral infection known to be transmitted to the fetus
during pregnancy. It is the leading infectious cause of birth defects including
deafness, death or major neurodevelopmental defects such as mental retardation.
CMV can be life threatening for persons who are immunocompromised by drug
therapy for transplantation, cancer treatment, or AIDS.
 
     The Company's business is subject to significant risks, including but not
limited to the risks inherent in its research and development efforts, including
preclinical testing and clinical trials; uncertainties associated both with
obtaining and enforcing its patents and with the patent rights of others; the
lengthy, expensive and uncertain process of seeking regulatory approvals;
uncertainties regarding government reforms and product pricing and reimbursement
levels; technological change and competition; manufacturing uncertainties and
dependence on third parties. Even if the Company's product candidates appear
promising at an early stage of development, they may not reach the market for
numerous reasons. Such reasons include the possibilities that the products will
be found unsafe or ineffective during clinical trials, will fail to receive
necessary regulatory approvals, will be difficult to manufacture on a large
scale, will be uneconomical to market or will be precluded from
commercialization by proprietary rights of third parties.
 
RESULTS OF OPERATIONS
 
     THREE MONTHS ENDED SEPTEMBER 30, 1998 AND 1997
 
  Revenues
 
     The Company earned $107,000 in revenue for the three months ended September
30, 1998, compared to $32,000 for the three months ended September 30, 1997. The
1998 revenue came principally from rental of a portion of the Company's animal
research facilities. The 1997 revenue resulted from research support payments
due to the Company under its license and development agreement with SmithKline
Beecham.
 
  Operating Expenses
 
     Research and development expenses increased to $12.4 million in the three
months ended September 30, 1998 from $5.1 million for the three months ended
September 30, 1997. These increases were primarily due to increased activities
surrounding FLUMIST(TM), including increased clinical trial and product
development activities and depreciation and other expenses associated with the
documentation, validation, and test production at manufacturing facilities.
Research and development expenses are expected to increase as the Company
expands its efforts in preclinical testing, product development and clinical
trial activities.
 
     Marketing, general and administrative expenses increased to $2.7 million in
the three months ended September 30, 1998 from $1.7 million for the three months
ended September 30, 1997. These increases were primarily due to increases in
staffing and market research and development activities associated principally
with FLUMIST(TM) and additions to the infrastructure necessary to support the
Company's research and
 
                                        9
<PAGE>   10
 
development activities. These expenses are expected to increase in the future in
continued support of these activities.
 
  Net Interest Income
 
     Net interest income decreased to $62,000 in the three months ended
September 30, 1998 from $669,000 for the three months ended September 30, 1997.
Net interest income is the result of increased interest income on the Company's
increase in average cash, cash equivalent and investment balances, due to the
Company's public offering of Common Stock in August 1997 and the private
offering of Notes in March 1998, offset by the increase in interest expense
related to the Notes.
 
     NINE MONTHS ENDED SEPTEMBER 30, 1998 AND 1997
 
  Revenues
 
     The Company earned $494,000 in revenue for the nine months ended September
30, 1998, compared to $446,000 for the nine months ended September 30, 1997. The
1998 revenue was from a grant payment from the NIH for research on the Company's
CMV vaccine, from rental of a portion of the Company's animal research
facilities, and from payments received for services rendered to other
biotechnology companies. The 1997 revenue resulted from research support
payments due to the Company under its license and development agreement with
SmithKline Beecham.
 
  Operating Expenses
 
     Research and development expenses increased to $33.1 million in the nine
months ended September 30, 1998, from $14.0 million for the nine months ended
September 30, 1997. These increases were primarily due to increases in research
and development activities and clinical trials of FLUMIST(TM) and the Company's
Parainfluenza Virus Type 3 (PIV-3) vaccine, preclinical testing associated with
other programs, preparation for the submission of the PLA/ELA for FLUMIST(TM),
and depreciation and other expenses associated with the documentation,
validation, and test production at manufacturing facilities. Research and
development expenses are expected to increase as the Company expands its efforts
in preclinical testing, product development, and clinical trial activities.
 
     Marketing, general and administrative expenses increased to $7.3 million in
the nine months ended September 30, 1998, from $4.3 million for the nine months
ended September 30, 1997. These increases were primarily the result of market
research regarding FLUMIST(TM) and additions to the infrastructure necessary to
support the Company's research and development, patent and legal costs, and
corporate development activities. These expenses are expected to increase in the
future in continued support of these activities.
 
  Net Interest Income
 
     Net interest income for the nine months ended September 30, 1998 was $1.2
million, as compared to $1.1 million for the nine months ended September 30,
1997. The increase in net interest income reflects the effect of the Company's
increase in average cash, cash equivalent and investment balances, due to a
private placement of Common Stock in March 1997, a public offering of Common
Stock in August 1997, and a private offering of Notes in March 1998, offset by
the increase in interest expense related to the Notes.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Aviron had cash, cash equivalents and marketable securities at September
30, 1998 of approximately $111.9 million. In order to preserve principal and
maintain liquidity, the Company's funds are invested in United States Treasury
obligations, highly rated corporate obligations and other liquid investments.
 
     The Company has financed its operations since inception primarily through
private placements of Preferred Stock from 1992 to 1995, an initial public
offering of Common Stock in November 1996, a private sale of Common Stock in
March 1997, a second public offering of Common Stock in August 1997, and the
 
                                       10
<PAGE>   11
 
Note offering in March 1998. Through September 30, 1998, the Company had raised
approximately $236.3 million from such activities, net of offering expenses.
Cash used in operations was $34.9 million and $14.5 million for the first nine
months of 1998 and 1997, respectively. Capital expenditures totaled $11.4
million for the first nine months of 1998 as compared to a nominal amount
expended during the same period in 1997 primarily due to expenditures for
facilities and equipment at the Medeva Pharma and PCI manufacturing plants. The
Company expects that capital expenditures will be at a slightly lower pace
during the remainder of 1998 as these facilities are nearing completion. Net
cash used in operating activities increased primarily due to increased research
and development expenditures. The Company expects expenditures for research and
development, clinical trials and marketing, general and administrative expenses
to continue to increase during the remainder of 1998 and in 1999 as the Company
develops its products, expands its clinical trials and prepares for the launch
of FLUMIST(TM).
 
     The Company anticipates that its existing cash, cash equivalents and
marketable securities, and revenues from existing collaborations, will enable it
to maintain its current and planned operations into 2000. The Company's future
cash requirements will depend on numerous factors, including continued
scientific progress in the research and development of the Company's technology
and vaccine programs; the size and complexity of these programs; the ability of
the Company to establish and maintain collaborative arrangements; progress with
preclinical testing and clinical trials; the time and costs involved in
obtaining regulatory approvals; the cost involved in preparing, filing,
prosecuting, maintaining and enforcing patent claims; the cost of constructing
manufacturing facilities, should they be deemed necessary; and product
commercialization activities. In particular, if the Company were to construct
and equip such a manufacturing facility during this period, the Company
anticipates that it would likely begin to make substantial additional capital
expenditures in 1999 and beyond, which may require the Company to seek
additional funding. The Company is seeking additional collaborative agreements
with corporate partners. There can be no assurance, however, that any such
agreements will be entered into or that they will reduce the Company's funding
requirements or that additional funding will be available. In addition, there
can be no assurance that, should the Company require outside funding through
additional debt or equity financings, such funds will be available on favorable
terms, if at all. If adequate funds are not available, the Company may be
required to delay, reduce the scope of, or eliminate one or more of its research
or development programs or to obtain funds through collaborative agreements with
others that may require the Company to relinquish rights to certain of its
technologies, product candidates or products that the Company would otherwise
seek to develop or commercialize itself, which would materially adversely affect
the Company's business, financial condition and results of operations.
 
IMPACT OF "YEAR 2000"
 
     Many older computer software programs refer to years in terms of their
final two digits only. Such programs may interpret the year 2000 to mean the
year 1900 instead, the so-called "Year 2000" problem ("Y2K"). If not corrected,
those programs could cause date-related transaction failures.
 
     The Company is using a number of computer programs across its entire
operations. The Company is in the process of performing a detailed assessment of
all internal computer systems to determine if and how Y2K problems may affect
its operations. The Company has identified some of its older financial and
accounting programs as non-Y2K compliant. However, the Company had already
planned to upgrade these systems, and intends to purchase only new systems that
are believed to be Y2K compliant. The Company is currently making inquiries of
its internal staff and third-party vendors, including its suppliers of
scientific equipment, to determine if Y2K problems exist which may affect the
Company's research and development operations, its communications, or other
administrative functions. The Company expects this assessment to be completed by
the end of 1998.
 
     The Company currently has no products available for commercial sale, and
does not anticipate FDA clearance for its lead product, FLUMIST(TM), until
mid-2000 at the earliest. The Company has contacted its third party
manufacturers to determine their level of Y2K compliance. This assessment is
expected to be completed by the end of 1998.
 
                                       11
<PAGE>   12
 
     External and internal costs specifically associated with modifying internal
use software for Y2K compliance are expensed as incurred. To this point, these
costs have not been material, and the Company does not expect such costs to be
material in the future. There can be no assurance, however, that the Company's
assessment of Y2K's potential impact on the Company will not change as it
completes its assessment, or that Y2K will not ultimately cause a material
disruption to the business of the Company.
 
                           PART II. OTHER INFORMATION
 
ITEM 1. LEGAL PROCEEDINGS.
 
     None
 
ITEM 2. CHANGES IN SECURITIES.
 
     None
 
ITEM 3. DEFAULTS UPON SENIOR SECURITIES.
 
     None
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
 
     None
 
ITEM 5. OTHER INFORMATION
 
     None
 
ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K
 
     None
 
                                       12
<PAGE>   13
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities and Exchange Act of 1934,
the registrant has duly caused this report to be signed in its behalf by the
undersigned thereunto duly authorized.
 
Date: November 13, 1998                   By: /s/J. LEIGHTON READ, M.D.
                                            ------------------------------------
                                                   J. Leighton Read, M.D.
                                                        Chairman and
                                                  Chief Executive Officer
 
Date: November 13, 1998                   By: /s/     FRED KURLAND
                                            ------------------------------------
                                                        Fred Kurland
                                                 Senior Vice President and
                                                  Chief Financial Officer
 
                                       13
<PAGE>   14
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
NO. OF EXHIBIT                           DESCRIPTION
- --------------                           -----------
<C>              <S>
    10.19*       Supply Agreement between the Company and Becton, Dickinson
                   and Company, dated
                 July 1, 1998.
    27.1         Financial Data Schedule.
    27.2         Financial Data Schedule
</TABLE>
 
- ---------------
 
 * Certain information in this document has been omitted and filed separately
   with the Commission. Confidential treatment has been requested for portions
   of this exhibit.

<PAGE>   1
                                                                   EXHIBIT 10.19

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS,
HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.


                                SUPPLY AGREEMENT

     THIS AGREEMENT (the "Agreement"), entered into and effective this 1st day
of July 1998 (the "Effective Date"), by and between BECTON, DICKINSON AND
COMPANY, a corporation organized under the laws of New Jersey, through its
PHARMACEUTICAL SYSTEMS DIVISION with a place of business at 1 Becton Drive,
Franklin Lakes, New Jersey 07417-1866 "BD"), and AVIRON, a corporation organized
under the laws of Delaware, with a place of business at 297 North Bernardo
Avenue, Mountain View, California 94043 ("Aviron").

                                   WITNESSETH:

     WHEREAS, BD has experience in the production of drug delivery devices and
containers, including syringe components;

     WHEREAS, Aviron is engaged in the development of virus vaccines which can
be delivered intra-nasally with the syringes produced by BD;

     WHEREAS, Aviron desires to purchase syringe components from BD and BD
desires to manufacture and supply such components to Aviron in accordance with
the terms and conditions set forth herein;

     WHEREAS, the [***] of Aviron's commercialization of its vaccine;

     NOW, THEREFORE, the parties hereto agree as follows:

                                    ARTICLE 1

                                   DEFINITIONS

Each of the capitalized terms used in this Agreement (other than the headings of
the Articles and Sections), whether used in the singular or the plural, shall
have the meaning as set forth below or, if not listed below, the meaning as
designated in places throughout this Agreement.

     1.1  "AFFILIATE" shall mean any entity that directly or indirectly
controls, is controlled by or is under common control with a party to this
agreement. As used in this Section 1.1, "control" shall mean the possession,
direct or indirect, of the power to direct or cause the direction of the
management or the policies of the entity, whether through the ownership of
voting securities, by contract or otherwise.

     1.2  "APPLICABLE LAWS" shall mean any laws, rules and regulations
applicable to the manufacture of the Product, including current Good
Manufacturing Practices of the Regulatory Authorities, any applicable
environmental, health and safety laws relating to the manufacture of the
Product, and any other laws, regulations or guidelines applicable to the
performance of this Agreement.

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[***] Confidential Treatment Requested.

                                       1.

<PAGE>   2


     1.3  "FDA" shall mean the U.S. Food and Drug Administration, and any
successor agency thereof.

     1.4  "FLU SEASON" shall mean the period of time during a calendar year in
which it is anticipated that the Product will be used to deliver the Vaccine,
which begins on the first day of August of each calendar year, e.g., beginning
August 1, 1999 for the 1999 Flu Season, unless Aviron provides BD with twelve
(12) months written notice of any changes to the starting date of the affected
Flu Season, or unless the parties mutually agree otherwise.

     1.5  "INTELLECTUAL PROPERTY" shall mean all patentable and unpatentable
inventions, discoveries, improvements, enhancements, modifications, data, trade
secrets, know-how and any equivalents thereof which are not in the public domain
and/or generated by BD and/or Aviron during the term of and pursuant to this
Agreement.

     1.6  "MF" shall mean the set of documents referred to in Applicable Laws as
either the Drug or Biologics "Master File" or the equivalent, as updated from
time to time, which is required for some portion of the manufacture and testing
of the Product for clinical use and commercial sale, and which is submitted to
the Regulatory Authorities and referenced in the Product License Application
filing in the U.S. or its foreign equivalent.

     1.7  "PRODUCT" shall mean the syringe assembled from the components listed
in Exhibit 1.7 which conform to the Specifications.

     1.8  "REGULATORY AUTHORITIES" shall mean the FDA and the corresponding
regulatory authorities of the European Union and its member states, and any
other country where Regulatory Approval is required for the manufacture, use or
sale of the Product and/or System.

     1.9  "SPECIFICATIONS" shall mean the technical and performance criteria of
each Product component as set forth in Exhibit 1.9.

     1.10 "SYSTEM" shall mean the Product combined with Aviron's Vaccine.

     1.11 "VACCINE" shall mean Aviron's intranasal influenza virus vaccine for
use in humans described in Exhibit 1.11, as amended from time to time by mutual
agreement of the parties. If requested by Aviron during the term of this
Agreement, and subject to any pre-existing obligations of BD to any third party,
BD and Aviron shall negotiate in good faith with each other with respect to
rights to use and sell the Product in connection with other [***] Aviron has
under development, including [***] as described in Exhibit 1.11 A, e.g., adding
such additional vaccines to Exhibit 1.11.

                                   ARTICLE 2

                              MANUFACTURE AND SALE

     2.1  During the term of this Agreement and subject to the terms and
conditions set forth herein, BD agrees to make commercially reasonable efforts
to manufacture and supply to

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[***] Confidential Treatment Requested.

                                       2.

<PAGE>   3


Aviron all amounts of the Product and/or components thereof, and Aviron agrees
to purchase all of its requirements for the Product and components for the
Product exclusively from BD in such quantities as from time to time may be
ordered by Aviron as provided herein.

     2.2  EXCLUSIVITY. BD shall supply the Product to Aviron initially on an
exclusive basis for commercial sale and use in the delivery of human influenza
vaccines through the 2001 Flu Season. Thereafter, for the remaining term of this
Agreement, BD shall supply the Product to Aviron on a non-exclusive basis for
commercial sale and use in the delivery of human influenza vaccines; however,
during the term of this Agreement, BD shall not knowingly provide or enter into
a contract to provide, or willingly maintain a contract to provide, the Product
to any third party (other than Aviron, its Affiliates and sublicensees) for
commercial sale and use in the delivery of [***], with the proviso that Aviron
shall have the burden of (i) notifying BD and providing BD with reasonably
sufficient evidence [***], and (ii) [***] in accordance with the above. Aviron
shall [***] BD under this provision to the extent that such damages have accrued
prior to [***] and the provision of reasonably sufficient evidence of this fact
to [***] makes a good faith effort to cease such activity.

     2.3  MARKING. To the extent permitted by applicable laws and regulations in
the various countries where the System is to be sold by Aviron, BD reserves the
right to mark the Product and/or components thereof with its name and/or
trademark substantially the same way as the marking on the Products supplied to
Aviron prior to the Effective Date, i.e., on the plunger rod, tip cap and dose
divider. Aviron agrees to make a good faith effort to [***] used in connection
with the System [***] shall not to be unreasonably withheld so long as the [***]
are used in a manner consistent with [***] guidelines. However, [***] would
prevent Aviron from entering into a license and distribution arrangement with a
third party, Aviron shall provide BD with prior notice of such circumstances
which will relieve Aviron from any further good faith effort obligation.

     2.4  [***] RIGHT OF [***]. Prior to granting to a third party [***] for use
of the [***] which would prevent [***] from [***] to [***] for use with its
[***] shall notify [***] of the terms of the [***] arrangement negotiated with
the third party. [***] may retain access to the supply of the [***] for use with
its [***] by giving [***] written notice within thirty (30) days from receipt of
[***] notice that it desires to enter into an agreement with [***] on such
terms, and [***] and [***] shall promptly thereafter execute an agreement with
such terms.

                                   ARTICLE 3

                       PRICE, ORDERS AND TERMS OF PAYMENT

     3.1  PRICE AND ADJUSTMENTS.

          (a)  PRICE. Aviron shall pay BD the prices set forth in Exhibit 3.1A
for each component of the Product, less applicable allowances, for the quantity
ordered and delivered in connection with the 1999 Flu Season, and Aviron shall
pay BD the prices set forth in Exhibit 3.1B for each component of the Product,
less applicable allowances, for the quantity ordered and 

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[***] Confidential Treatment Requested.

                                       3.

<PAGE>   4

delivered in connection with the 2000 Flu Season and thereafter for the
remaining term of this Agreement. For quantities in excess of [***] Product
units, the parties shall [***]. Purchase orders placed for delivery of Product
and/or components thereof in connection with a particular Flu Season shall be
aggregated for purposes of calculating the price of the Product and/or
components thereof delivered in connection with such Flu Season.

          (b)  [***]. The prices set forth in Exhibits 3.1A 8,: B shall be [***]
for Product and/or components thereof ordered and delivered through [***].
Thereafter, [***] shall be entitled to [***] of the Product and/or components
thereof on an annual basis by no more than [***] in the [***] by the [***] of
the [***] for the preceding [***] period. In addition, [***] shall be entitled
to [***] of the Product and/or components thereof resulting from [***] by [***]
or [***] to the [***] for the Product and/or components thereof. If the parties
are unable to agree in good faith on a [***], an independent auditor reasonably
acceptable to both parties shall review the [***] caused by the [***] and shall
[***] based on the [***]. If [***] does not agree with the auditor's
conclusions, [***] shall have the right to [***] upon [***] written notice to
[***].

          (c)  [***]. In the event [***] enters into a [***] for the [***] with
a third party (subject to the [***] provided in Section [***]), [***] shall so
advise [***] and [***] for the Product shall be [***] where appropriate, in
order to [***] to the third party if the [***], including any [***] and other
[***] received by [***] from such third party, is [***] than the [***] in
Exhibit [***] for the same [***]; provided, however, that any [***] shall only
be applicable to situations involving [***] and [***] terms for [***] used in
[***].

     3.2  FORECASTS. In order to assist BD in its production planning over the
term of this Agreement, Aviron shall provide BD with a rolling eighteen month
(18) non-binding forecast of its best estimate of its purchase requirements of
the Product and/or components thereof, with such forecast indicating
requirements for any Flu Season occurring during such period ("Rolling
Forecast"). Thereafter, Aviron shall up-date the Rolling Forecast on a quarterly
basis. Presently, Aviron estimates that it will initially require approximately
[***] Products beginning with the [***] and [***] Products for [***].

     3.3  PURCHASE ORDERS.

          (a)  Aviron agrees to purchase [***] of Product up to [***] Product
units in connection with the [***]. BD agrees to supply Aviron with at least
[***] Product units in accordance with a delivery schedule to be agreed upon
between the parties prior to [***], which may be revised thereafter as agreed
upon between the PARTIES. In addition, BD agrees to undertake [***] effort to
supply Aviron with up to [***] Product units. However, in the event BD is only
able to supply Aviron with less than [***] Product units, the price per [***]
units shall be [***] as instead of the [***] as indicated in Exhibit 3.1A, and
BD's failure shall [***] of this Agreement.

          (b)  Aviron agrees to purchase [***] Product units in connection with
the [***] Flu Seasons during the term of this Agreement ("Purchase Order"). In
addition, on or

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                                       4.

<PAGE>   5

before [***] of each year during the term of this Agreement beginning with
[***], Aviron shall submit to BD a binding purchase order for its requirements
for the Product and/or components thereof for the following Flu Season. In each
Purchase Order for any Flu Season, Aviron shall state, after consultation with
BD, a reasonable delivery schedule for Products and/or components thereof to be
delivered for that Flu Season, and shall allow up to [***] for delivery to begin
(with each binding Purchase Order being for at least a [***] Product units).
Aviron may submit additional purchase orders for its [***], and BD shall
exercise [***] efforts to meet such [***] depending upon [***] and any [***].

          (c)  Subject to the [***], BD shall accept Purchase Orders submitted
by Aviron in accordance with the terms and conditions set forth herein,
including but not limited to those set forth in Subsection 3.3(a) above, which
are within [***] of the quantity Aviron indicated in its Rolling Forecast.
Orders for Products in excess of such amounts shall be subject to acceptance by
BD [***]. However, BD shall exercise [***] efforts to meet any changes,
including schedule and quantity changes, and BD shall [***] effort to comply
with unplanned changes in Purchase Orders but shall [***] orders for Products
that are not within [***] of the quantity Aviron has committed to purchase
during the coming Flu Season.

     3.4  INVENTORY. [***] BD agrees to manufacture and maintain a stock of the
greater of [***] Product units or [***] of the then current Purchase Order up to
a maximum of [***] Product units for shipment within a reasonable period of time
not to exceed [***] days from ordering to accommodate any [***] pursuant to
Section 3.3 above ("INVENTORY"). In addition, during the term of this Agreement
the parties shall negotiate in good faith any increases in the amount of Product
to be maintain by BD in inventory. However, upon termination or expiration of
this Agreement, Aviron agrees to [***], subject to Aviron's right to draw down
such Inventory with its last Purchase Order.

     3.5  INVOICES AND PAYMENT TERMS. BD shall invoice Aviron upon each shipment
of the Product and/or components thereof, and Aviron shall pay the full balance
of each invoice within sixty (60) days of delivery by BD to the common carrier.
In addition, at the end of each Flu Season, BD shall invoice and reimburse
Aviron for any applicable credits [***] to meet the [***] level, including
levels for volume for Purchase Orders [***], or for any charge backs if [***]
during the [***], including any applicable [***].

     3.6  MINIMUM SUPPLY. In view of the fact that Aviron [***] purchase [***]
Product units under the Agreement in connection with [***], BD agrees to supply
at least [***] Product units in connection with such [***] and in the event
[***] at least [***] Product units, [***] a [***] of [***] for each Product unit
[***]. BD's [***] shall [***] of this Agreement. The [***] shall be [***] for
the [***], and Aviron [***] of the Product units supplied by BD.

     3.7  WITHDRAWAL FROM MANUFACTURE. BD agrees to provide the Product and/or
components thereof to Aviron during the term of the Agreement and will give
[***] written notice to Aviron in the event BD elects to withdraw from the
business of manufacturing the Product and/or components thereof.

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[***] Confidential Treatment Requested.

                                       5.

<PAGE>   6

                                   ARTICLE 4

                       EXPANSION OF MANUFACTURING CAPACITY

     4.1  CAPACITY EXPANSION. BD agrees to expand its manufacturing capacity for
the Product manufactured by establishing a high-speed manufacturing line with a
capacity of approximately [***] Product units per month ("High-Speed LINE"). BD
agrees to make commercially reasonable efforts to have the High-Speed Line
completed and validated to manufacture Product for commercial use and sale by
[***] ("Completion Date").

     4.2  [***] BY AVIRON. In order to facilitate BD's expansion of its
capacity, Aviron agrees to [***] as per the following schedule ([***]):

<TABLE>
<CAPTION>
             [***]          Date                               [***]
                            ----                               -----
             <S>            <C>                                <C>
               1            [***]                              [***]
               2            [***]                              [***]
               3            [***]                              [***]
               4            [***]                              [***]
</TABLE>

     4.3  [***]. BD shall [***] over the term of this Agreement by at BD's
option either [***] Aviron with [***] of each Product or by [***] to Aviron
[***] for each Product ordered and delivered in connection with a Flu Season
beginning with the 2000 Flu Season until such time as the [***]. Upon expiration
of this Agreement or termination of this Agreement by Aviron for other than
cause, any [***] shall expire, and BD shall not be required to [***] any [***]
to Aviron. Upon termination of this Agreement by Aviron for cause, BD shall
[***].

     4.4  [***]. If Aviron forecasts requirements of the Product in [***] of the
High-Speed Line for a particular Flu Season, and if Aviron [***] BD the [***],
BD will make a [***] effort to [***] within [***] after receipt of the [***] by
establishing a [***] of the [***] will be made by [***] described in Section
[***] with respect to the prior [***], except that the [***] will be [***] for
each Product ordered and delivered in [***] of the first [***] until such time
as the [***] has been [***]. The other terms and conditions of Section [***]
shall apply mutatis mutandis.

                                   ARTICLE 5

                      REGULATORY ACTIVITIES AND MANUFACTURE

     5.1  REGULATORY ACTIVITIES.

          (a)  BD shall be responsible for diligently filing and prosecuting any
authorizations or approvals for the Product by applicable Regulatory Authorities
required for the

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                                       6.

<PAGE>   7

commercial sale of the System and diligently respond to any comments or concerns
raised by such Regulatory Authorities. BD shall provide Aviron with any
registration dossier or materials, and any amendment thereof, that are in its
possession or control in respect of the Product to the extent necessary for
Aviron to perform its obligations under this Agreement.

          (b)  Subject to BD's obligations under Subsection 5.1(a) above, Aviron
shall be responsible for diligently filing and prosecuting any authorizations or
approvals by applicable Regulatory Authorities required for the commercial sale
of the Vaccine and the System and diligently respond to any comments or concerns
raised by such Regulatory Authorities. Aviron shall provide BD with any
registration dossier or materials, and any amendment thereof, that are in its
possession or control in respect of the System to the extent necessary for BD to
perform its obligations under this Agreement. Aviron shall also be responsible
for maintaining all regulatory approvals from the applicable Regulatory
Authorities for the Vaccine and its delivery by means of the System.

          (c)  Each party shall have full access and the right of reference to
the other party's regulatory filings and approvals, but only to the extent
necessary and appropriate for the filing of its regulatory submissions as
required under this Agreement.

     5.2  MANUFACTURE OF PRODUCT.

          (a)  The Product and/or components thereof shall be manufactured in
accordance with Applicable Laws and consistent with the MF and in conformance
with the Specifications. With each shipment, BD shall provide certificates of
conformance and sterilization to Aviron for all Product and/or components
thereof delivered, any batch records as Aviron may request from time to time,
including any applicable analytical and manufacturing documentation related to
the Product and/or components thereof, and any necessary customer samples as
described in the Specifications.

          (b)  Aviron shall provide to BD written notice of any required changes
to the Specifications, and BD will use its reasonable efforts to accommodate
such Specification changes. If any Specification change requested by Aviron
affects BD's costs of producing the Product by more than [***] as set forth in
Section [***] hereof. 

     5.3  CHANGE MANAGEMENT.

          (a)  BD shall advise Aviron in writing of any proposed Specification
change affecting the form, fit or function of the Product and/or components
thereof or any regulatory approvals of the Product and/or components thereof or
the System, which proposed changes must be approved by Aviron in writing prior
to implementation by BD or BD's sub-contractors. Approval of proposed changes
will be considered given if Aviron has not responded to BD in writing within
[***] following notification by BD of proposed changes.

          (b)  In the event Aviron and BD are unable to agree on such changes,
BD shall continue to supply the Product and/or components thereof to Aviron
pursuant to the Specifications in effect at the time of BD's proposal until an
alternate manufacturer is in a

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                                       7.

<PAGE>   8

position to supply the Product and/or components thereof to Aviron, or for a
period of [***] years, whichever is less, unless otherwise prevented by law or
court order from doing so.

          (c)  Aviron (and its Affiliates) shall have the right to audit BD for
 compliance with Applicable Laws, including quality systems regulations, at
reasonable intervals at Aviron's cost. Such audits shall be scheduled at
mutually agreeable times upon at least [***] days' advance written notice to BD.
The audit shall be subject to the conditions of confidentiality under Article 8.

          (d)  BD shall establish change control procedures which document and
allow the tracking of any and all changes made by BD or its sub-contractors the
manufacturing process and other aspects of the manufacture and testing of the
Product and/or components thereof.

                                   ARTICLE 6

                             DELIVERY AND ACCEPTANCE

     6.1  TERMS OF DELIVERY. The Product and/or components thereof shall be
shipped [***] in accordance with Exhibit 6.1. No provision on Aviron's Purchase
Order forms or BD's Invoice forms which may purport to impose different
conditions upon a party, nor any other modifications of this Agreement, shall be
of any force or effect, unless in writing and signed by the parties claimed to
be bound thereby.

     6.2  INSPECTION, ACCEPTANCE OR REJECTION OF PRODUCT SHIPMENTS.

          (a)  Within a reasonable time after delivery of the Product and/or
components thereof to the facility designated by Aviron, Aviron or its designee
shall inspect and test the Product and/or components thereof at its own cost. If
Aviron or its designee finds that the Product and/or components thereof does not
conform to the Specifications, Aviron or its designee shall, within [***] after
the date of the receipt of a shipment containing non-conforming Product and/or
components thereof, give BD written notice of any claim setting forth the
details of such non-conformity, or otherwise shall be deemed to have accepted
the shipment. BD shall replace out of its Inventory maintained in accordance
with the provisions of Section 3.4, at its expense and at no cost to Aviron, any
batch of Product and/or components thereof containing non-conforming Product
and/or components thereof within [***] after BD receives the above-mentioned
written notice from Aviron, and BD shall replace defective Products and/or
components thereof in excess of its Inventory within [***] thereafter. In
accordance with BD's request, any batches containing Product and/or components
thereof which do not conform to the Specifications shall either be returned to
BD or destroyed at BD's expense and election.

          (b)  If, during the shelf-life of the Product, Aviron or its
distributors discover any non-compliance of the Product with the Specifications
and if such non-compliance was not reasonably discoverable by Aviron with the
visual inspection and the acceptance tests performed pursuant to Subsection (a)
above, Aviron shall have [***] from the date of discovery of such

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                                       8.

<PAGE>   9

latent defect to provide BD with written notice thereof, and the provisions of
Subsection (a) above shall apply rnutatis mutandis. 

          (c)  In the event the parties disagree as to whether Product conforms
to the Specification or whether it was reasonably discoverable as provided in
Subsection (b), the rejected Product shall be submitted to a mutually acceptable
third party testing laboratory, which shall determine whether such Products meet
the Specification. The parties agree that such testing laboratory's
determination shall be final. The party against whom the testing laboratory
rules shall bear the fees and costs charged by the testing laboratory. If the
testing laboratory rules that the Products meet the Specification, Aviron shall
purchase the Products at the price agreed in accordance with Section 3.1,
irrespective of whether BD has already replaced the Products. If the testing
laboratory rules that the Products do not meet the Specification and the
Products have not yet been replaced by BD, BD shall credit Aviron's account with
an amount equal to the purchase price of the rejected Products, or refund that
amount to Aviron, as the case may be.

                                   ARTICLE 7

                      WARRANTIES, INDEMNITIES AND INSURANCE

     7.1  WARRANTIES.

          (a)  BD warrants that Product and/or components thereof at the time of
delivery to Aviron is not adulterated or misbranded within the meaning of the
Federal Food, Drug and Cosmetic Act, as amended (the "Act"), or within the
meaning of any applicable non-U.S., state or municipal law in which the
definitions of adulteration and misbranding are substantially the same as those
contained in the Act, as such Act and such laws are constituted and effective at
the time of delivery, and is not an article which may not, under the provisions
of Sections 404 and 505 of such Act, be introduced into interstate commerce.

          (b)  BD warrants to Aviron that at the time of delivery the Product
and/or components thereof (i) meets the Specifications, (ii) was manufactured in
accordance with applicable quality systems regulations and other mutually
agreeable standards and (iii) is free from defects in design, materials and
workmanship; provided, however, that the [***] with respect to the [***] with
respect to the [***]. Claims on account of defects, loss of or damage to the
Product and/or components thereof shall be made by Aviron in accordance with the
provisions of Section [***], and [***] in accordance therewith. The warranty
shall [***] or to (i) any [***] that had been [***] for any purpose [***] or
(ii) any [***]. If [***] is made by Aviron within the [***] period of time
referred to in [***], the Product and/or components thereof is deemed to be
[***], and BD shall [***] thereto, except as provided in Subsection [***].

          (c)  BD warrants that the Product and/or components thereof [***] and
Aviron warrants that Aviron's Vaccine to be combined with the Product and/or
components thereof

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[***] Confidential Treatment Requested.

                                       9.

<PAGE>   10

[***]. Each party warrants further that it has all the necessary rights and
powers to grant the rights to the other party as provided in this Agreement, and
that the execution, delivery and performance of this Agreement as of the
Effective Date or thereafter does not result in a violation or conflict with any
agreements with third parties.

          (d)  BD MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO
THE PRODUCT AND/OR COMPONENTS THEREOF, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ALL OTHER EXPRESS OR
IMPLIED WARRANTIES ARE HEREBY DISCLAIMED BY BD. 

     7.2  INDEMNITY.

          (a)  Aviron shall indemnify, defend and hold BD harmless from and
against any and all claims, demands, actions, suits, causes of action, damages
and expenses (including but not limited to expenses of investigation,
settlement, litigation and reasonable attorneys' fees incurred in connection
therewith) which are hereafter made, sustained or brought against BD by any
third party for the recovery of damages for damage to tangible property or
bodily injury, illness or death of any third party caused or alleged to be
caused by the use, distribution, sale of the System or any Aviron product that
includes the Product, unless such claims, demands, actions, suits, causes of
action, damages or expenses allegedly occurred as a result of BD's negligence,
willful misconduct, or breach of its warranties contained in Section 7.1 hereof.

          (b)  BD shall indemnify, defend and hold Aviron harmless from and
against any and all claims, demands, actions, suits, causes of action, damages
and expenses (including, but not limited to expenses of investigation,
settlement, litigation and reasonable attorneys' fees incurred in connection
therewith) which are hereafter made, sustained or brought against Aviron by any
third party arising out of or resulting from BD's negligence, willful misconduct
or breach of the warranty set forth in Section 7.1 hereof, or from an alleged
infringement or misappropriation by BD of any patent, BD trademark, copyright or
trade secret of a third party relating to the Product and/or components thereof.

          (c)  Each party shall notify the other party in writing promptly upon
becoming aware of any claim or potential claim covered by this Section 7.2, and
shall describe such claim or potential claim in reasonable detail based upon the
information then in the claiming party's possession. The claiming party shall
reasonably cooperate with the responding party in the defense of all such
claims. No settlement or compromise for a consideration other than money shall
be binding on a claiming party without its prior written consent, which shall
not be unreasonably withheld. 

     7.3  INSURANCE. Each party warrants to the other that it is currently
insured and covenants that at all times during the term of this Agreement it
will maintain a comprehensive general liability insurance policy which (i) is
sufficient to adequately protect against the risks associated with its ongoing
business, up to a maximum of [***] per occurrence and [***] in the aggregate and
(ii) provides that it cannot be terminated or canceled without giving the other
party

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                                      10.

<PAGE>   11

[***] written notice. Each party shall continue to maintain such insurance as
during the term of the Agreement and thereafter, until a commercially reasonable
time after Aviron has ceased to market the System or any other product which
incorporates the Product.

                                   ARTICLE 8

                                 CONFIDENTIALITY

     8.1  CONFIDENTIAL INFORMATION. All information furnished by Aviron to BD or
any of its Affiliates, or by BD to Aviron or any of its Affiliates, during the
term of this Agreement, relating to the subject matter hereof ("Confidential
Information") shall be kept confidential by the party receiving it, and the
party receiving Confidential Information shall not make use of it except for
purposes authorized by this Agreement, nor disclose any Confidential Information
to any person or firm unless previously authorized in writing to do so;
provided, however, that the party receiving Confidential Information may
disclose it as necessary to responsible officers, employees and independent
contractors for the purposes contemplated by this Agreement, provided that such
officers, employees and independent contractors shall have assumed obligations
of confidentiality no less stringent than those contained herein. Both parties
recognize that reciprocal non-disclosure agreements have been signed that do not
contradict the terms outlined above.

     8.2  OTHER INFORMATION. The foregoing limitations on the use and disclosure
of Confidential Information shall not apply to information which: 

          (a)  at the time of disclosure or thereafter lawfully becomes a part
of the public domain;

          (b)  was otherwise in the receiving party's lawful possession prior to
disclosure as shown by its written records;

          (c)  is released from confidential status by mutual agreement of the
parties; or

          (d)  has been developed by the receiving party independently of the
Confidential Information received from the disclosing party.

     8.3  PUBLICITY. Except as may be required by applicable laws and
regulations or a court of competent jurisdiction, neither party may make any
public release or other disclosure with respect to this Agreement or the terms
hereof without the prior consent of the other party, which consent shall not be
unreasonably withheld or delayed. Notwithstanding the above, the parties shall
issue a joint press release promptly after the execution of this Agreement
substantially in the form as attached in Exhibit 8.3 or as otherwise mutually
agreed between the parties.

     8.4  DISCLOSURE. If the receiving party is required by any governmental
agency, court or other quasi-judicial or regulatory body to provide Confidential
Information received under this Agreement, the receiving 

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                                      11.

<PAGE>   12

party shall not be liable for such disclosure provided that the receiving party,
as promptly as reasonably possible, gives notice to the disclosing party of the
requirement in order that the disclosing party may contest the requirement to
provide such information.

                                   ARTICLE 9

             INTELLECTUAL PROPERTY RIGHTS TO THE PRODUCT AND SYSTEM

     9.1  OWNERSHIP OF INTELLECTUAL PROPERTY. During the term of this Agreement,
Aviron shall promptly disclose, in writing, to BD all Intellectual Property
relating to the Product and/or components thereof, and BD shall promptly
disclose, in writing, to Aviron all Intellectual Property relating to the
Vaccine. The rights of ownership in Intellectual Property and any patent or
patent application claiming such Intellectual Property or any other proprietary
right covering such Intellectual Property (referred to herein as "Patent
Rights"), are retained by the party that is the employer of the inventor of such
Intellectual Property with inventorship being determined under U.S. patent law.
Accordingly, Aviron shall own Intellectual Property and Patent Rights made
solely by employees of Aviron, BD shall own Intellectual Property and Patent
Rights made solely by employees of BD and BD and Aviron shall own jointly any
Intellectual Property and Patent Rights made jointly by employees of BD and
Aviron, except as follows:

          (a)  Aviron shall be the sole and exclusive owner of any Intellectual
Property and Patent Rights relating solely to the Vaccine, whether the same is
made jointly by Aviron and BD or solely by employees of Aviron or BD;

          (b)  BD shall be the sole and exclusive owner of any Intellectual
Property and Patent Rights relating solely to the Product and/or components
thereof, whether the same is made jointly by Aviron and BD or solely by
employees of Aviron or BD; and

          (c)  Aviron and BD shall jointly own any Intellectual Property and
Patent Rights relating solely to the System, whether the same is made jointly by
Aviron and BD or solely by employees of Aviron using the Product or BD using the
Vaccine. However, under no circumstances shall BD grant to any third party a
license or option to any such jointly owned Intellectual Property and Patent
Rights unless such license or option includes a restriction expressly excluding
the field of the Vaccine (as defined in Exhibit 1.11) from the license or
option. 

     9.2  COOPERATION AND ASSISTANCE. Upon written request, each party shall
execute and deliver to the other party all descriptions, applications,
assignments and other documents and instruments necessary or proper to carry out
the provisions of any agreement or assert ownership of its Intellectual Property
in accordance with Section 9.1, without further compensation. In addition, the
parties shall reasonably cooperate with and assist each other or their nominees
in all reasonable ways and at all reasonable times, including, but not limited
to, testifying in all legal proceedings, signing all lawful papers and in
general performing all lawful acts reasonable, necessary or proper, to aid the
other party in obtaining, maintaining, defending and enforcing all lawful Patent
Rights, copyright, trade secrets, know-how and the like in the United States and
elsewhere. Each party shall reimburse the other party for all reasonable
expenses incurred in connection with the cooperation and assistance provided
pursuant to this Section 9.2.

                                      12.

<PAGE>   13

     9.3  LICENSES. To the extent necessary to carry out its obligations or
exercise its rights under this Agreement, Aviron hereby grants BD a
non-exclusive, worldwide, royalty-free license for the term of this Agreement,
without right to sublicense, under Aviron's Intellectual Property owned by or
licensed to Aviron as of the Effective Date or generated by either party
pursuant to this Agreement which would otherwise be infringed, solely to permit
BD or its Affiliates, sub-contractors, distributors and sublicensees to perform
its obligations under this Agreement and for no other purpose. To the extent
necessary to carry out its obligations or exercise its rights under this
Agreement, BD hereby grants Aviron a non-exclusive, world-wide, royalty-free
license for the term of this Agreement, without right to sublicense, under BD
Intellectual Property owned by or licensed to BD as of the Effective Date or
generated by either party pursuant to this Agreement which would otherwise be
infringed, solely to permit Aviron or its Affiliates, sub-contractors,
distributors and sublicensees to offer for sale, sell, import and use the
Product and/or components thereof supplied by BD to Aviron under this Agreement
and for no other purpose.

                                   ARTICLE 10

                              TERM AND TERMINATION

     10.1 TERM. Unless terminated in accordance with the provisions of Section
10.2 below, the term of this Agreement shall commence on the Effective Date and
shall terminate five (5) years from the Effective Date. Thereafter, this
Agreement shall be automatically renewed for additional one (1) year periods
unless either party provides the other party with written notice of its desire
not to renew the Agreement at least twelve (12) months before the expiration of
the term of this Agreement or any renewal thereof.

     10.2 EARLY TERMINATION. This Agreement may be terminated as follows: 

          (a)  By either party immediately upon written notice by one party to
the other, if the other party makes an assignment for the benefit of creditors,
has a receiver appointed for it or any of its assets, or files a voluntary
petition or has filed against it an involuntary petition under the Bankruptcy
Code of 1978, as amended, 11 U.S.C. {} 101 et seq., or under any state
insolvency laws providing for the relief of debtors, and such involuntary
petition is not dismissed within sixty (60) days of its filing;

          (b)  By either party if the other party fails to perform or otherwise
breaches any of its material obligations hereunder, by giving notice of its
intent to terminate and stating the grounds therefor. The party receiving such
notice shall have sixty (60) days from the receipt thereof if such breach or
failure involves a non-monetary obligation, and thirty (30) days if the breach
or failure is regarding a monetary obligation, to cure the failure or breach, at
which time this Agreement shall terminate if such failure or breach has not been
cured. In no event, however, shall such notice of intention to terminate be
deemed to waive any rights to damages or any other remedy which the party giving
notice of breach may have as a consequence of such failure or breach; and

                                      13.

<PAGE>   14

          (c)  After December 31, 2000, by Aviron with at least [***] prior
written notice to BD.

     10.3 EFFECT OF TERMINATION. Termination of this Agreement, for whatever
reason, shall not affect any rights or obligations of either party which are
intended by the parties to survive termination. Without limiting the generality
of the previous sentence, the rights and obligations specified in Sections 5.1,
7.1, 7.2 and 10.4, and Articles 8 and 9 which have accrued prior to termination
will survive termination of this Agreement.

     10.4 OBLIGATION TO CONTINUE TO SUPPLY. If BD provides Aviron with written
notice of its desire not to renew this Agreement as provided in Section 10.1
above, BD shall continue to supply Aviron with the Product and/or components
thereof under the terms of this Agreement for at least [***] from the date of
such Notice.

                                   ARTICLE 11

                               GENERAL PROVISIONS

     11.1 FORCE MAJEURE. Any delay in the performance of any of the duties or
obligations of either party hereto caused by an event outside the affected
party's reasonable control ("Force Majeure") shall not be considered a breach of
this Agreement and the time required for performance shall be extended for a
period equal to the period of such delay. Force Majeure shall include, without
limitation, acts of God, acts of the public enemy, insurrections, riots,
injunctions, embargoes, fires, explosions, floods, or other unforeseeable causes
beyond the reasonable control, and without the fault or negligence of the party
so affected. The party so affected shall give prompt notice to the other party
of such cause, and shall take whatever reasonable steps are appropriate in that
party's discretion to relieve the effect of such cause as rapidly as possible.
Each party shall have the right to terminate this Agreement with written notice
effective upon receipt if Force Majeure continues to prevent performance by the
other party for a period of more than [***] continuous months.

     11.2 ASSIGNMENT. Neither party shall assign this Agreement or any part
thereof without the prior written consent of the other party; provided, however,
either party, without such consent, may assign this Agreement or delegate its
responsibilities under this Agreement to an Affiliate, and in connection with
the transfer or sale of substantially its entire business to which this
Agreement pertains in the event of its merger or consolidation with or
acquisition by another company or in the event of the transfer or sale to a
wholly-owned subsidiary. 

     11.3 SUCCESSORS IN INTEREST. This Agreement shall be binding upon and inure
to the benefit of the parties hereto, their subsidiaries, affiliates, successors
and permitted assigns. Assignment to an affiliate or subsidiary shall not
release the party making such assignment from responsibility for its obligations
under this Agreement. 

     11.4 ENTIRE AGREEMENT. This Agreement shall constitute the entire Agreement
between the parties hereto and shall supersede any other agreements, whether
oral or written,

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                                      14.

<PAGE>   15

express or implied, as they pertain to the Product and/or components thereof.
This Agreement may not be changed or modified except by written instrument
signed by both parties.

     11.5 SEVERABILITY. If any provision of this Agreement is deemed or held to
be illegal, invalid, unenforceable or contrary to any laws or regulations, all
other provisions will continue in full force and effect, and the parties where
possible will substitute for such provision a valid and enforceable provision
which conforms as nearly as possible with the original intent of the parties or
such provision shall be limited or eliminated to the minimum extent necessary so
that this Agreement shall otherwise remain in full force and effect and
enforceable.

     11.6 RELATIONSHIP. The relationship created by this Agreement shall be
strictly that of the buyer and SELLER. Neither party is hereby constituted an
agent or legal representative of the other party for any purpose whatsoever, and
is granted no right or authority hereunder to assume or create any obligation,
express or implied, or to make any representation, warranties or guarantees,
except as are expressly granted or made in this Agreement.

     11.7 NOTICE. Any notice required hereunder may be served by either party on
the other by personal delivery, by sending same, post-prepaid, by registered or
by certified mail, by overnight mail, or by overnight delivery to the respective
party's address set forth below: 

<TABLE>
<S>                             <C>
BD:                             Becton Dickinson Pharmaceutical Systems
                                1 Becton Drive
                                Franklin Lakes, New Jersey 07417-1886
                                Attention: President

with a copy to:                 Becton, Dickinson and Company
                                1 Becton Drive
                                Franklin Lakes, New Jersey 07417-1880
                                Attention: General Counsel

Aviron:                         Aviron
                                297 North Bernardo Avenue
                                Mountain View, California 94043
                                Attention: Chief Executive Officer

with a copy to:                 Cooley Godward LLP
                                3000 El Camino Real
                                5 Palo Alto Square
                                Palo Alto, California 94306-2155
                                Attention: Barbara A. Kosacz, Esq.

</TABLE>
or to such other address as one party may notify the other as provided herein.
The date of any Notice shall either be the date of delivery or the date of
refusal to accept delivery, whichever occurs first.

     11.8 WAIVER. A waiver by either party or a breach of any of the terms of
this Agreement by the other party shall not be deemed a waiver of any subsequent
breach of the terms of this Agreement.

                                      15.

<PAGE>   16


     11.9 DISPUTE RESOLUTION. 

          (a)  The parties shall attempt in good faith to resolve any dispute
arising out of or relating to this Agreement promptly by negotiations between
executives who have the authority to settle such dispute. Either party may give
the other party written notice of any dispute hereunder not resolved in the
normal course of business. Within thirty (30) days following such delivery of
such notice, executives of both parties shall attempt to resolve such dispute in
the course of discussions conducted by telephone or face-to-face meeting at a
mutually acceptable times and places, and thereafter as often as they reasonably
deem necessary, to exchange relevant information.

          (b)  Except as provided in Subsection 6.2(c), if the matter has not
been resolved within sixty (60) days following the written notice of a dispute,
or if the parties fail to discuss or meet within the thirty (30) day period,
either party may initiate non-binding mediation of the dispute under the Center
for Public Resources Model ADR Procedures for Mediation of Business Disputes
("CPR Procedures") before pursuing all other available remedies. Once the
mediation is initiated by one party, the other party shall participate in and
conduct mediation in accordance with the CPR Procedures in good faith. Neither
party shall have the right to pursue other remedies available by law or equity
unless the CPR Procedures have been completed without settlement of the dispute.
If the dispute is not resolved in the course of discussions and if neither party
initiates mediation within one hundred and twenty (120) days from receipt of a
notice of dispute pursuant to Subsection (a) above, then the dispute is consider
resolved and the parties are precluded from pursuing any other available
remedies in connection therewith, unless the parties agree in writing to extend
such period of time.

          (c)  Each party shall pay its own costs and expenses incurred in
attempting to resolve a dispute pursuant to the procedures set forth in this
Section and shall share equally the cost of the mediation. 

     11.10 GOVERNING LAW. This Agreement is to be governed by and construed in
accordance with [***] law, including all applicable provisions of the Uniform
Commercial Code.

     11.11 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which once so executed and delivered shall be deemed an
original, but all of which shall constitute but one and the same Agreement. All
headings and captions are inserted by convenience of reference only and shall
not affect the meaning or interpretation of any provision hereof.


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                                      16.
<PAGE>   17


     IN WITNESS WHEREOF, each of the parties have caused this Agreement to be
signed by their duly authorized representatives.

<TABLE>
<S>                                         <C>
BECTON, DICKINSON AND COMPANY,              AVIRON
THROUGH ITS PHARMACEUTICAL SYSTEMS
DIVISION

By:                                         By:
    -----------------------------               --------------------------------
    Authorized Signature                         Authorized Signature

- ---------------------------------           ------------------------------------
           Name & Title                                 Name & Title

Date Signed:                                Date Signed:
             --------------------                        -----------------------
</TABLE>

List of Attached Exhibits:

<TABLE>
<S>               <C>
1.7               Product
1.9               Specifications
1.11              Aviron Vaccine
1.11A             Other Aviron Vaccines
3.1A & B          Prices Lists
6.1               Shipping Instructions
8.3               Press Release
</TABLE>
         Aviron Supply Agreement

                                      17.

<PAGE>   18

                                   EXHIBIT 1.7

                         PRODUCT COMPONENT DESCRIPTIONS:

Item 1:
[***]

Item 2:
[***]

Item 3:
[***]

Item 4:
[***]

Item 5:
[***]



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<PAGE>   19

                                   EXHIBIT 1.9

[***]



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<PAGE>   20



[***]


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                                       2.
<PAGE>   21



[***]

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                                       3.

<PAGE>   22


[***]


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                                       4.

<PAGE>   23

[***]


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                                       5.

<PAGE>   24

[***]


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                                       6.

<PAGE>   25

[***]


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[***] Confidential Treatment Requested.

                                       7.

<PAGE>   26

[***]


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[***] Confidential Treatment Requested.

                                       8.

<PAGE>   27

[***]

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[***] Confidential Treatment Requested.

                                       9.

<PAGE>   28

[***]

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[***] Confidential Treatment Requested.

                                      10.

<PAGE>   29

[***]

- -----------------
[***] Confidential Treatment Requested.


                                      11.

<PAGE>   30

[***]

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                                      12.
<PAGE>   31

[***]

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[***] Confidential Treatment Requested.

                                      13.

<PAGE>   32

[***]

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[***] Confidential Treatment Requested.

                                      14.
<PAGE>   33

[***]

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[***] Confidential Treatment Requested.

                                      15.

<PAGE>   34

[***]

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[***] Confidential Treatment Requested.

                                      16.
<PAGE>   35

[***]

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[***] Confidential Treatment Requested.

                                      17.

<PAGE>   36

[***]

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[***] Confidential Treatment Requested.

                                      18.

<PAGE>   37

[***]

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[***] Confidential Treatment Requested.

                                      19.

<PAGE>   38

[***]

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[***] Confidential Treatment Requested.

                                      20.

<PAGE>   39

[***]

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[***] Confidential Treatment Requested.

                                      21.
<PAGE>   40
[***]

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[***] Confidential Treatment Requested.

                                      22.

<PAGE>   41
[***]

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[***] Confidential Treatment Requested.

                                      23.

<PAGE>   42
[***]

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[***] Confidential Treatment Requested.

                                      24.

<PAGE>   43

[***]

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[***] Confidential Treatment Requested.

                                      25.

<PAGE>   44
[***]

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[***] Confidential Treatment Requested.

                                      26.

<PAGE>   45
[***]

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[***] Confidential Treatment Requested.

                                      27.
<PAGE>   46

[***]

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[***] Confidential Treatment Requested.

                                      28.
<PAGE>   47

[***]

- -----------------
[***] Confidential Treatment Requested.

                                      29.

<PAGE>   48

[***]

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[***] Confidential Treatment Requested.

                                      30.

<PAGE>   49

[***]

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[***] Confidential Treatment Requested.

                                      31.

<PAGE>   50

[***]

- -----------------
[***] Confidential Treatment Requested.

                                      32.

<PAGE>   51

[***]

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[***] Confidential Treatment Requested.

                                      33.

<PAGE>   52

[***]

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[***] Confidential Treatment Requested.

                                      34.
<PAGE>   53

[***]

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[***] Confidential Treatment Requested.

                                      35.

<PAGE>   54

                                  EXHIBIT 1.11

Aviron vaccines to be used with Product:



[***]

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<PAGE>   55



                                  EXHIBIT 1.11A

Other Aviron Vaccines:

[***]

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                                       2.

<PAGE>   56

                                  EXHIBIT 3.1A



PRICING [***]



[***]









All prices include packaging for shipment in accordance with the Specifications.













[***]


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<PAGE>   57

                                  EXHIBIT 3.1B



PRICING [***]



[***]









All prices include packaging for shipment in accordance with the Specifications.






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                                       2.
<PAGE>   58

                                   EXHIBIT 6.1

Shipping Instructions:

1.   General Shipping Instructions:

     -    BD shall ship the Product on an ongoing basis from Pont-de-Claix to
          its warehouse in New Jersey, according to a schedule to be mutually
          agreed upon between the parties.

     -    Aviron's orders shall be shipped from the New Jersey facility to the
          filling and finishing facility designated by Aviron, according to a
          schedule to be mutually agreed upon between the parties.

     -    [***]

2.   Special Shipping Instructions:

     -    [***]

3.   Storage at BD:

     -    [***]

4.   Shipping Documentation:

     -    BD shall provide with each shipment of Product a Certificate of
          Conformance and Sterility, and upon request, BD shall provide a copy
          of the test results obtained in the course of conformance testing of
          the Product by BD prior to the release of the Product to Aviron.





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<PAGE>   59

                                  EXHIBIT 8.3

<PAGE>   60

BECTON DICKINSON AND AVIRON SIGN JOINT SUPPLY
AGREEMENT FOR FLUMIST(TM) INTRANASAL INFLUENZA
VACCINE SPRAY DEVICE

Franklin Lakes, NJ and Mountain View, CA - August XX, 1998 - Becton Dickinson
and Company (NYSE:BDX) and Aviron (NASDAQ:AVIR) today announced they have signed
a worldwide multiyear supply agreement in which Becton Dickinson will supply its
ACCUSPRAY(TM) non-invasive nasal spray delivery system for administration of
Aviron's novel FLUMIST(TM) intranasal influenza vaccine. Financial terms were
not disclosed.

FLUMIST(TM) a live, attenuated influenza virus, is delivered to the mucous
membrane of the nose where it cAN stimulate production of mucosal and
circulating antibodies against influenza. In June, Aviron submitted a Product
License Application/Establishment License Application for FLUMIST(TM) to the
U.S. Food and DrUG Administration. Aviron is seeking U.S. licensure for
FLUMIST(TM) to prevent influenza and its complications IN children and adults.
In addition, the company is seeking licensure for FLUMIST(TM) , when
coadministered wiTH inactivated vaccine (flu shots), in high-risk adults such as
the elderly.

Under terms of the supply agreement, Becton Dickinson will be the exclusive
supplier of the ACCUSPRAY(TM) system TO Aviron through the 2001-02 flu season.
The agreement includes plans for a capacity expansion to accommodate production
of 50 million units. The ACCUSPRAY(TM) system is a patented, proprietary,
non-invasive nasal deliveRY system designed to be patient-friendly and simple to
use, making it easy for health care providers to administer FLUMIST(TM) . The
ACCUSPRAY(TM) system has been used by Aviron to administer FLUMIST(TM) in its
clinical trials.

FLUMIST(TM) has been tested in approximately 5500 individuals aged 12 months to
81 years, as part of a CollaboratiVE Research and Development Agreement (CRADA)
between Aviron and the National Institute of Allergy and Infectious Disease
(NIAID) of the National Institutes of Health (NIH).

"Becton Dickinson has provided the nasal delivery systems to all of our
FLUMIST(TM) trials beginning in 1995," saID J. Leighton Read, M.D., Aviron's
Chairman and Chief Executive Officer. "We are also using the ACCUSPRAY(TM)
systEM for our Phase 2 clinical trial of Aviron's intranasal croup vaccine
targeting parainfluenza virus (PIV-3). Becton Dickinson provides a substantial
expertise in the development of novel drug delivery systems and high volume
manufacturing."

"Becton Dickinson is looking forward to a long term, broad relationship with
Aviron," said Werner De Backer, Worldwide President of Becton Dickinson
Pharmaceutical Systems. "The ACCUSPRAY(TM) system demonstrates BectON
Dickinson's commitment to the development of innovative drug delivery systems
beyond traditional needle-based drug delivery as we develop products to help
people live healthy lives through innovations in immunization. Becton
Dickinson's commitment to innovation in immunization is again seen in our broad
partnership with UNICEF for the elimination of Tetanus Toxoid."

                                       2.

<PAGE>   61

Aviron is a biopharmaceutical company based in Mountain View, CA focused on
prevention of disease. The company's goal is developing vaccines, which offer
cost-effective prevention of a wide range of infections that affect the general
population. The majority of Aviron's products under development are live
vaccines against viral infections. FLUMIST(TM) , an intranasal influenza
vaccine, is currently under review by the U.S. Food and DrUG Administration.
Other products for respiratory conditions include parainfluenza (PIV-3) and
respiratory syncytial virus (RSV). Also under development are vaccines for
cytomegalovirus (CMV) and genital herpes (HSV-2). Aviron is also developing, in
collaboration with SmithKline Beecham, a subunit vaccine against Epstein-Barr
virus (EBV) infection, a major cause of infectious mononucleosis.

This press release contains forward-looking statements regarding the performance
of Aviron. Actual results may differ materially from those suggested here.
Additional information concerning factors that could cause such a difference is
contained in Aviron's Annual Report on Form 10-K for year ending December 31,
1997.

Becton Dickinson, headquartered in Franklin Lakes, NJ, is a global medical
technology company that manufactures and sells a broad range of medical supplies
and diagnostic systems for use by health care professionals, medical research
institutions and the general public. The company employs approximately 18,000
people in more than 40 countries. For its most recent fiscal year the company
reported revenues of $2.8 billion.

This press release also contains certain forward-looking statements (as defined
under Federal securities laws) regarding the performance of Becton Dickinson,
including future revenues, products and income, which are based upon current
expectations of Becton Dickinson and involve a number of business risks and
uncertainties. Actual results could vary materially from anticipated results
described in any forward-looking statement. Factors that could cause actual
results to vary materially include, but are not limited to, competitive factors,
changes in regional, national or foreign economic conditions, changes in
interest or foreign currency exchange rates, delays in product introductions,
Year 2000 issues, and changes in health care or other governmental regulations,
as well as other factors discussed herein and in Becton Dickinson's filings with
the Securities and Exchange Commission.

To receive an index and copies of recent press releases, call Aviron's
News-On-Call toll-free fax service, 800-758-5804, extension 114000. Additional
information about the company can be located at http://www.aviron.com.

For further information, contact:
<TABLE>
<S>                        <C>
Aviron                     Media
                           Karen Gilbert: 650-919-6578
                           John Bluth, Fleishman-Hillard: 212-453-2429

Investors                  Fred Kurland: 650-919-6666
                           Lyn Christenson: 650-919-3716

Becton Dickinson           J.J. Costagliola - Director of Sales: 201-847-4726
                           Gerhard Mayer - Marketing Manager: 201-847-4735
</TABLE>

                                       3.

<PAGE>   62



                                       4.

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</TABLE>


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