NORTH AMERICAN VACCINE INC
10-K, 1997-03-11
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM 10-K

         (Mark One)
            [X]   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                  SECURITIES EXCHANGE ACT OF 1934 [FEE REQUIRED]

                   For The Fiscal Year Ended December 31, 1996
                                       OR
            [  ]   TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE
                   SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]

                   For the transition period from ____________ to ____________

                         Commission File Number 1-10451

                          NORTH AMERICAN VACCINE, INC.
             (Exact name of registrant as specified in its charter)
                   

             Canada                                         98-0121241
             ------                                         ----------
  (State or other jurisdiction of                          (IRS Employer
  incorporation or organization)                         Identification No.)

      12103 Indian Creek Court
         Beltsville, Maryland                                 20705
- ----------------------------------------                   ---------
(Address of principal executive offices)                   (Zip Code)


Registrant's telephone number, including area code: (301) 419-8400
                                                    ---------------
Securities registered pursuant to Section 12(b) of the Act:

       Title of each class          Name of each exchange on which registered

   Common Stock,  No Par Value                American Stock Exchange 
   ---------------------------                -----------------------

 Securities registered pursuant to Section 12(g) of the Act:

                                      None
                                ---------------
                                (Title Of Class)

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  report(s)),  and (2) has been  subject  to such  filing
requirements for the past 90 days. Yes _X__   No__


Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

State the aggregate market value of the voting stock held by  non-affiliates  of
the registrant as of a selected date within 60 days prior to the date of filing.

  Specified Date -- January 31, 1997; Aggregate Market Value -- $425,806,105  

Indicate the number of shares outstanding of each of the registrant's classes of
common stock, as of the latest practicable date.

Common Stock, No Par Value, Outstanding As Of February 28, 1997 -- 31,549,425


<PAGE>



                       DOCUMENTS INCORPORATED BY REFERENCE

         Part III of this Annual Report on Form 10-K  incorporates  by reference
certain  sections  of  the  registrant's  Proxy  Statement  to be  furnished  to
shareholders  pursuant to the  Securities  Exchange Act of 1934, as amended,  in
connection  with the 1997 Annual Meeting of  Shareholders of the registrant (the
"1997 Proxy Statement").


                                TABLE OF CONTENTS

ITEM     DESCRIPTION                                                     PAGE
- ----     -----------                                                     ----

         Part I

1        Business..........................................................  3
2        Properties........................................................ 37
3        Legal Proceedings................................................. 38
4        Submission of Matters to a Vote of Security Holders............... 38

         PART II

5        Market for Registrant's Common Equity and Related 
              Stockholder Matters.......................................... 39
6        Selected Financial Data........................................... 41
7        Management's Discussion and Analysis of Financial 
              Condition and Results of Operation........................... 43
8        Financial Statements and Supplementary Data....................... 55
9        Changes in and Disagreements with Accountants on Accounting 
              and Financial Disclosure..................................... 83

         PART III

10       Directors and Executive Officers of the Registrant................ 83
11       Executive Compensation............................................ 83
12       Security Ownership of Certain Beneficial Owners and 
              Management................................................... 83
13       Certain Relationships and Related Transactions.................... 83

         PART IV

14       Exhibits, Financial Statement Schedules, and Reports 
              on Form 8-K.................................................. 84

         Signatures........................................................ 85


                                     - 2 -


<PAGE>


 

                                     PART I


ITEM 1.  BUSINESS
         --------

INTRODUCTION

         North  American  Vaccine,  Inc.  (the  "Company")  is  engaged  in  the
research,  development,  production and marketing of vaccines for the prevention
of infectious  diseases in children and adults. The Company's first product is a
patented, monocomponent acellular pertussis ("aP") vaccine for the prevention of
whooping cough,  which has been combined with diphtheria and tetanus toxoids for
use in a combined  diphtheria-tetanus-acellular  pertussis  ("DTaP") vaccine for
all primary and booster pediatric doses.  Regulatory approval to market the DTaP
vaccine in Sweden was granted in February 1996. In addition, regulatory approval
for a DTaP-IPV vaccine, which combines the Company's acellular pertussis vaccine
with diphtheria and tetanus toxoids and an enhanced,  inactivated  polio vaccine
("IPV"),  was  granted in Denmark in  September  1996.  The Company has 14 other
vaccines in various stages of development,  including combination vaccines using
its DTaP  vaccine as an  "anchor,"  as well as nine  conjugate  vaccines for the
prevention of various bacterial diseases in children and adults.

         Vaccination  against  infectious  disease  is a  primary  component  of
pediatric,  and an increasingly  important element of adult health-care programs
throughout  the world.  For  example,  in the  United  States,  seven  pediatric
vaccines,  including  vaccines  for  the  prevention  of  diphtheria,   tetanus,
pertussis and polio,  are  generally  required by state  immunization  programs.
According  to data from the  United  States  Centers  for  Disease  Control  and
Prevention ("CDC"), over 22 million doses of combination diphtheria, tetanus and
pertussis  vaccines  were sold in the United  States  during  1993.  The Company
believes  that a market of at least  comparable  size exists  outside the United
States. In the adult market, vaccinations,  particularly of older persons, could
lower the 50,000 to 70,000 deaths  annually in the United States from influenza,
pneumonia and hepatitis B infections. The United States Department of Health and
Human  Services has  estimated  that the costs to society of these  diseases and
other diseases for which vaccines  currently exist exceed $10 billion each year.
As a result, health-care providers,  including managed care organizations,  have
increasingly  recognized that  immunization of adults is a cost effective method
for preventing the incidence of disease and infection.

         DTaP VACCINE. Vaccination against diphtheria,  tetanus and pertussis is
mandated by most states for all children with doses  administered  at two, four,
six and between 15 to 18 months of age and  immediately  prior to entering grade
school. Prior to 1996, the only diphtheria-tetanus-pertussis vaccine approved in


                                     - 3 -
<PAGE>



the United  States for the primary  doses given to infants  included  the entire
BORDETELLA  PERTUSSIS  bacterium ("whole cell") that has been inactivated in the
production  process.  In 1996 and  1997,  three  acellular  pertussis  vaccines,
combined with vaccines against diphtheria and tetanus, have been licensed by the
United States Food and Drug Administration ("FDA") for use in the United States.
The Company  believes  that DTaP  vaccines  will  replace  the "whole  cell" DTP
vaccines.  The "whole cell" pertussis  component is generally believed to be the
leading cause of the adverse reactions  associated with the DTP vaccines,  which
range from minor rashes to fevers to convulsions and collapse.  In the 1970s and
1980s,  negative publicity  regarding the side effects of "whole cell" pertussis
vaccines  led to  decreased  rates of  acceptance  for the  vaccine in Japan and
certain European countries,  and to the suspension of its use in Sweden in 1979.
Unlike  "whole cell" and other acellular  pertussis  vaccines,  the Company's aP
vaccine consists solely of pertussis toxin that has been purified and chemically
inactivated (a "toxoid").  Clinical studies have shown that the Company's toxoid
induces  immunity with fewer  serious  adverse  reactions  than the "whole cell"
pertussis vaccine.  The Company holds exclusive licenses under United States and
foreign patents on the aP toxoid and the method of its manufacture.

         The Company filed an application with the FDA in September 1995 seeking
approval to market its DTaP  vaccine,  Certiva[TRADEMARK],  in the United States
for all primary and booster  doses.  On October 29, 1996, the FDA's Vaccines and
Related  Biological  Products  Advisory  Committee  ("FDA  Advisory  Committee")
reviewed  Certiva[TRADEMARK],  and FDA approval for the vaccine is pending.  See
"Products Under Development - Acellular Pertussis Vaccines."

         COMBINATION VACCINES. The Company is developing combination vaccines by
combining the DTaP vaccine as an "anchor"  with  additional  pediatric  vaccines
that may be administered in a single  injection.  The Company  believes that, in
many instances,  these  combination  vaccines may replace  stand-alone  vaccines
because  combination  vaccines  will reduce the number of  required  injections,
lower  treatment  costs  and  improve   compliance  with  standard   vaccination
schedules.  The Company's first combination vaccine,  DTaP-IPV,  combines an IPV
with the DTaP  vaccine.  On September  30, 1996,  the Danish  National  Board of
Health granted Statens Seruminstitut ("SSI") of Copenhagen,  Denmark approval of
the DTaP-IPV vaccine for all primary and booster doses for infants and children.
This  combination  vaccine,  which  includes the Company's  acellular  pertussis
toxoid, was developed jointly by SSI and the Company,  and SSI holds the product
rights in Denmark and other  Scandinavian  and Baltic  countries.  In the United
States,  the  CDC  has  issued  a  revised   recommendation   related  to  polio
vaccination.  A sequential schedule,  including two doses of IPV followed by two
doses of oral polio  vaccination  ("OPV") is now the  preferred  recommendation,
although a four- dose OPV or four-dose IPV schedule is  acceptable.  The Company
intends to pursue regulatory approval in other European countries and the United
States for the  DTaP-IPV  vaccine.  The Company  also is  developing  a DTaP-HIB
vaccine  that  combines  the  Company's  DTaP  vaccine  with a  vaccine  against
HAEMOPHILUS  INFLUENZAE  type b ("HIB")  infections,  as well as a  DTaP-IPV-HIB
vaccine. See "Products Under Development - Combination Vaccines."


                                     - 4 -
<PAGE>



         CONJUGATE  VACCINES.   The  Company,  using  patented  and  proprietary
technologies,  is  developing  several  conjugate  vaccines  for  prevention  of
diseases in children and adults.  Conjugate  vaccines  are formed by  chemically
linking (i.e., conjugating)  polysaccharides  to a protein.  This procedure has
been  shown  to  enhance  the  immunogenic  properties  of the  polysaccharides,
particularly  in infants.  Conjugate  vaccines are useful in preventing  several
serious diseases, including meningitis, pneumonia and strep throat. Vaccines are
not currently available for the prevention of several of these diseases. A Phase
I/II  clinical  trial  has  been  conducted  for  a  vaccine   against  group  B
streptococcal  infections  utilizing patented  technologies held by the Company,
and the  Company  has  completed  a Phase I  clinical  trial in  adults  for its
meningococcal  C conjugate  vaccine in the United  Kingdom.  See "Products Under
Development - Conjugate Vaccines."

         COLLABORATIONS.  To further  develop  and expand  its  technologies  in
pediatric and adult vaccines, the Company has established several relationships,
including   licenses   and   collaborations   with   pharmaceutical   companies,
universities and government  agencies.  Some of these institutions have provided
funding for  clinical  trials and  research,  and  conducted  joint  development
projects with the Company.  For example, the Company has entered into agreements
with Pasteur  Merieux-Connaught  to jointly  develop the Company's new conjugate
vaccine  against   meningococcus  B  infection,   for  immunization  of  adults,
adolescents and infants.  Additionally,  the Company is  collaborating  with the
National  Institutes of Health in the  development of its Group B  streptococcal
vaccine.

         In October 1996, the Company and Abbott Laboratories  ("Abbott") signed
a definitive agreement under which Abbott would market Certiva[TRADEMARK] in the
United States to the private physician and managed care markets when approved by
the FDA, with the Company marketing Certiva[TRADEMARK] to government purchasers.
The marketing agreement also will allow Abbott to market the Company's DTaP-HIB,
DTaP-IPV  and  DTaP-IPV-HIB  combination  vaccines  which  are  currently  under
development. See "Business Relationships" and "Marketing of Vaccines."

         ORGANIZATION. The Company was incorporated as a Canadian corporation on
August 31, 1989 for the purpose of acquiring  American  Vaccine  Corporation,  a
publicly held Delaware corporation  ("American Vaccine"),  and certain assets of
BioChem Pharma Inc., a publicly traded pharmaceutical company ("BioChem"),  in a
share purchase and merger transaction  (collectively described as the "Merger").
On February 28, 1990,  shareholders of American Vaccine approved the Merger. The
Company  had no  operations  prior to the Merger.  Pursuant  to the Merger,  the




                                     - 5 -
<PAGE>



shareholders  of  American  Vaccine  received  50%  ownership  in  the  Company.
Simultaneously,  BioChem purchased a 50% interest in the Company in exchange for
cash, shares of BioChem common stock, and the license or assignment and transfer
of certain rights and other intangible assets.

BUSINESS STRATEGIES

         The  objective  of the  Company  is to  become  a  leading  researcher,
developer and  manufacturer of  state-of-the-art  vaccines for the prevention of
infectious  diseases in children and adults.  In pursuing  this  objective,  the
Company  focuses on developing  and securing  patented and  proprietary  vaccine
technologies.  In addition,  the Company seeks to minimize the development  time
and costs for its products by: (i) licensing  technologies  that, in preclinical
studies or clinical trials, have demonstrated  prospects for becoming successful
vaccine candidates; (ii) collaborating with government and academic institutions
to jointly develop new vaccines and sponsor clinical trials;  and (iii) pursuing
collaborations with pharmaceutical and vaccine manufacturers, where appropriate,
to maximize the value of the Company's products and technologies.

         The  Company  intends to market  its DTaP  vaccine  directly  to United
States and certain foreign governments through established  purchasing programs.
In the  United  States,  federal  and state  governments  currently  purchase  a
substantial  proportion  of  pediatric  vaccines.  The  Company  also  pursues a
strategy of securing  distribution,  joint venture and similar arrangements with
third  parties to sell its  products  in the  United  States and in areas of the
world where local partners are critical to market penetration.  The Company also
intends to focus on the  development and  commercialization  of vaccines for the
prevention of diseases and infections in adults, for which demand is anticipated
to  increase  in light of the trend  towards  managed  care and the  established
cost-effectiveness of vaccines.

OVERVIEW OF VACCINE MARKET

         PEDIATRIC  VACCINES.  Due to the potential for epidemic  disease,  most
countries consider  vaccinations to be a matter of national  importance.  In the
United  States,  the  seven  vaccines  generally  required  by  state  pediatric
vaccination  programs are intended to prevent  diphtheria,  tetanus,  pertussis,
measles,  mumps,  rubella and polio.  In addition to these seven  vaccines,  the
CDC's Advisory Committee on Immunization Practices ("ACIP") periodically reviews


                                     - 6 -
<PAGE>



current  immunization  practices and issues its  recommendations  for additional
pediatric  vaccinations.  The ACIP  has  issued a  recommendation  for  standard
vaccinations  against HIB,  hepatitis B and varicella  (chickenpox).  In Western
Europe,  vaccination  against  diphtheria,  tetanus and  pertussis  is generally
recommended,  with each country  establishing its own vaccination  schedules and
requirements.

         Children  in  the  United  States  receive  immunizations  from  public
providers,  such as  local  health  departments,  and  from  private  providers.
Immunizations  provided  by public  providers  are  generally  paid for  through
federal  and state  government  funding  under  public  health  programs.  These
programs  are  intended  to  reduce  barriers  to  immunization  and to  improve
immunization  rates by  providing  free  vaccine to  qualifying  low-income  and
uninsured infants and children.  Government purchases  historically have been at
prices  substantially  below those  offered to the private  sector and presently
account for a substantial  proportion of the vaccine  doses  distributed  in the
United States.  In addition,  the  government  promotes the  availability  of an
adequate supply of necessary  pediatric vaccines for United States public health
programs.  In order to achieve this objective,  the National  Childhood  Vaccine
Injury Act of 1986 ("NCVI Act") created a no-fault insurance program designed to
compensate those who suffer specified  vaccine-related  injuries associated with
the  administration of one or more of the vaccines  generally  required by state
pediatric  vaccination  programs.  This insurance  program is funded through the
levy of an excise tax paid by the manufacturers on the sale of certain pediatric
vaccines, including combined diphtheria-tetanus-pertussis vaccines.

         ADULT  VACCINES.  Adults,  especially  older persons who are at greater
risk of contracting and succumbing to disease and infection, can benefit greatly
from immunizations.  In the United States, 50,000 to 70,000 adults die each year
of  influenza,  pneumococcal  infections  and  hepatitis  B. The  United  States
Department of Health and Human  Services has estimated that the costs to society
of these and other  diseases  for which  vaccines  currently  exist  exceed  $10
billion each year. In addition,  vaccines have been widely  recognized as highly
cost-effective  in  preventing  the  incidence  of disease  and  infection.  For
example, a 1995 study published in The New England Journal of Medicine indicates
that annual immunizations with influenza vaccine,  which costs approximately $10
per dose,  reduce the  medical  costs and sick days by more than $46 per patient


                                     - 7 -
<PAGE>


immunized.  Moreover,  it is  becoming  widely  recognized  that many  childhood
vaccine-preventable  infections and diseases, such as pertussis,  are also found
among  younger  adults,  who serve as  reservoirs  for,  and source of pediatric
exposure  to,  these  infections  and  diseases.  While  the size of the  target
populations for adult vaccines may vary and adult  vaccination  rates tend to be
low,  some of these  markets  are much  larger  than the target  population  for
pediatric  vaccines.  With the trend in the United States towards  managed care,
the  Company  believes  that the  market  for  adult  vaccines  will  expand  as
health-care providers increasingly recognize vaccines as a cost-effective method
for preventing the incidence of disease and infection.

PRODUCTS UNDER DEVELOPMENT

         The Company is focusing  its research  and  development  efforts on the
vaccines set forth in Table 1 below. The summary information included in Table 1
is provided solely for convenience of reference and is qualified in its entirety
by the detailed discussion of each of the Company's products that follows. There
can be no assurance that any of these vaccines will be developed successfully by
the  Company  or  licensed  by the FDA or any  other  regulatory  authority  for
commercial  sale. See "Risk  Factors-Need  for  Regulatory  Approvals" and "Risk
Factors-Uncertainties Related to Clinical Trials."



                                     - 8 -
<PAGE>

<TABLE>
<CAPTION>

                                     TABLE 1

                           PRODUCTS UNDER DEVELOPMENT

        PRODUCTS                          DISEASE                                      STATUS (1)
- ----------------------------       -------------------------------         --------------------------------
<S>                                <C>                                     <C>
ACELLULAR PERTUSSIS VACCINES
  DTaP.....................         Diphtheria, tetanus and                Licensed in Sweden; U.S. product
                                    pertussis (whooping cough)             license application pending

  aP.......................         Pertussis (adult booster)              U.S. safety and immunogenicity
                                                                           clinical trial completed
COMBINATION VACCINES
  DTaP-IPV.................         Diphtheria, tetanus, pertussis         Licensed in Denmark;
                                    and polio                              preclinical in U.S.

  DTaP-HIB.................         Diphtheria, tetanus, pertussis         Preclinical
                                    and meningitis

  DTaP-IPV-HIB.............         Diphtheria, tetanus,                   Preclinical
                                    pertussis, polio and 
                                    meningitis
CONJUGATE VACCINES
  Group B
  Streptococcal............         Neonatal sepsis and                    Phase I/II clinical trial completed
                                    meningitis

  Meningococcal B..........         Meningitis                             Preclinical

  Meningococcal C..........         Meningitis                             Phase I clinical trial completed


  Meningococcal A/C                 Meningitis                             Preclinical
 
 Meningococcal
    A/B/C..................         Meningitis                             Preclinical

  Haemophilus
    Influenzae type b......         Meningitis                             Preclinical

  Group A
    Streptococcal..........         Streptococcal pharyngitis (strep       Preclinical
                                    throat), skin infections, etc.

  Pneumococcal(otitis
     media)................         Otitis media (middle ear               Preclinical
                                    infection)

  Pneumococcal.............         Pneumococcal pneumonia                 Basic Research

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

(1)   Preclinical  development denotes work to refine product performance  characteristics
      and to  conduct  studies  relating  to  product  composition,  stability,  scale-up,
      toxicity and efficacy in order to create a prototype  formulation in preparation for
      the filing of an investigational  new drug application with the FDA for authority to
      commence  testing in humans (clinical  studies).  Phase I-III clinical trials denote
      safety and efficacy  tests in human  patients in accordance  with FDA  guidelines as
      follows:

      Phase I: Safety,  immunogenicity,  and optimal dosage  studies.  
      Phase II:  Detailed  evaluations  of safety,  immunogenicity  and  optimal
      dosage in limited number of subjects in target population.
      Phase  III:   Evaluation  of  safety  and  efficacy  in  expanded   target
      population.

      See "Government Regulation."

</TABLE>

                                     - 9 -
<PAGE>


ACELLULAR PERTUSSIS VACCINES

         BACKGROUND.  Immunization  against  diphtheria,  tetanus and  pertussis
using a  combined  vaccine  during  infancy  and  childhood  has been a  routine
practice in the United States since the late 1940s.  The vaccination  program is
considered  to be a major  factor in reducing  the  incidence  of, and number of
deaths  associated with, each of these diseases.  Vaccination for the prevention
of  diphtheria,  tetanus and pertussis  currently is required in the majority of
states within the United States and is scheduled to be  administered to children
at the  ages of  two,  four,  six and 15 to 18  months  of age,  with a  booster
immediately  prior to entering grade school. In addition,  immunization  against
diphtheria,  tetanus and pertussis is also required in many countries outside of
the United States.

         Prior to 1996, the only diphtheria-tetanus-pertussis  vaccines approved
for use in the United  States for the doses given to infants at the ages of two,
four and six months included the entire BORDETELLA  PERTUSSIS bacterium that has
been inactivated in the production  process.  It is generally  believed that the
use of the "whole cell" BORDETELLA  PERTUSSIS bacterium has been a leading cause
of the adverse  reactions  associated  with the  existing  DTP  vaccines.  These
adverse reactions  include minor local reactions (such as redness,  swelling and
tenderness), minor temperature elevations,  fretfulness,  drowsiness,  vomiting,
loss  of  appetite,  high  fever,  excessive  screaming,  high  pitched  crying,
convulsions, and collapse  (hypotonic-hyporesponsive  episode). In addition, the
National  Institutes of Health, in recently  concluded clinical trials in Sweden
and Italy,  announced  that  a licensed  "whole-cell" DTP vaccine widely used in
the United  States had  efficacy  rates  significantly  below that of  acellular
pertussis  vaccines.  It is  anticipated  that  the use of  acellular  pertussis
vaccines  will  offer  advantages  over  the  currently  licensed  "whole  cell"
pertussis  vaccines in terms of  efficacy,  as well as with  respect to improved
tolerability  and fewer serious adverse  reactions.  Currently,  three acellular
pertussis vaccines,  combined with vaccines against diphtheria and tetanus, have
been licensed by the FDA for use in the United  States.  In addition,  one other
company  has  filed  for  regulatory  approval  in the  U.S.  for its  acellular
pertussis  vaccine.  See  "Products  Under  Development  -  Acellular  Pertussis
Vaccines - DTaP Vaccine" and "Competition."

         DTaP VACCINE.  The Company has developed an acellular pertussis vaccine
in combination  with  diphtheria and tetanus  toxoids for use as a combined DTaP
vaccine in childhood  immunization  programs.  The Company's acellular pertussis


                                     - 10 -
<PAGE>



vaccine  consists  of  pertussis  toxin that has been  purified  and  chemically
inactivated.  In clinical trials,  this toxoid has been shown to induce immunity
with fewer serious adverse  reactions than the "whole cell"  pertussis  vaccine.
The aP toxoid and the method of its manufacture are the subject of United States
and  foreign  patents  licensed   exclusively  to  the  Company.  See  "Business
Relationships."

         In  September  1995,  the  Company  filed an  application  with the FDA
seeking approval to market its DTaP vaccine,  Certiva[TRADEMARK],  in the United
States for all primary and booster doses.  On October 29, 1996, the FDA Advisory
Committee reviewed Certiva[TRADEMARK]. Representatives from the FDA, the Company
and the clinical investigators presented the clinical data from several studies.
These  studies  involved  over 100,000  doses  administered  to more than 45,000
infants and children  with no serious  adverse  events or deaths  related to the
administration  of the  vaccine  as judged by the  clinical  investigators.  The
incidence of high fever, redness, pain and swelling were all significantly lower
after use of the acellular  pertussis  vaccine than after  immunization with the
"whole cell" pertussis vaccine. The data presented to the FDA Advisory Committee
by the  co-principal  clinical  investigator  in  Sweden  also  established  the
estimates of efficacy of Certiva[TRADEMARK] in preventing pertussis disease.

         The FDA  Advisory  Committee,  after the  presentation  of the data and
discussion,   concluded  that  Certiva[TRADEMARK]  is  safe  and  effective  for
administration  at two, four, six and 15-18 months of age. In addition,  the FDA
Advisory  Committee  concluded  that  Certiva[TRADEMARK]  could be  administered
concurrently with the  administration of polio,  HAEMOPHILUS  INFLUENZAE type b,
hepatitis B and measles- mumps-rubella  vaccines,  which are all recommended for
immunization  during  the first two years of life.  The FDA  Advisory  Committee
raised no  concerns  regarding  the  adequacy of the data  regarding  the use of
Certiva[TRADEMARK]  for the  booster  dose given to children at 4-6 years of age
following  primary  immunization  using  the  "whole  cell"  pertussis  vaccine.
Additional  data is required to support use at 4-6 years of age  following  four
consecutive doses of Certiva[TRADEMARK]. The FDA Advisory Committee commented on
the adequacy of the data  regarding  the use of the vaccine for the booster dose
given to toddlers at 15-18 months of age following  primary  immunization  using
the "whole cell" pertussis vaccine.  In response to those comments,  the Company
intends to supplement the data presented at the FDA Advisory  Committee  meeting
and additional data may be provided in post-marketing  studies. The Company does
not believe that any additional  clinical studies will be required in connection
with its product license application, other than standard post-licensure testing
and  surveillance  for continued  monitoring  of the vaccine.  This is a forward
looking  statement  made  pursuant to the safe harbor  provisions of the Private
Securities  Litigation Reform Act of 1995. Forward looking statements inherently
involve  risks and  uncertainties  which may affect the  Company's  business and
prospects,  including without limitation the requirement for regulatory approval
of  products  by the  FDA,  nature  of  competition,  effective  marketing,  and
uncertainties  relating to clinical  trials,  all as discussed under the heading
"Risk Factors",  below.  The  conclusions of the FDA Advisory  Committee are not
binding on the FDA.


                                     - 11 -
<PAGE>



         In  February  1996,  a license was  granted to the  Company's  European
partner,  SSI, to market the DTaP  vaccine in Sweden for all primary and booster
doses for infants and children.  The Company  intends to prepare the appropriate
regulatory  filings  for the DTaP  vaccine in certain  European  countries,  and
approvals in any of these  European  countries can precede and are not dependent
upon filings with or approval by the FDA. The Company may file these  regulatory
applications alone,  through SSI for countries within its territory,  or through
distributors.   See  "Marketing  of  Vaccines"  and  "Business   Relationships."
Notwithstanding  the  foregoing,  there can be no assurance  that the regulatory
filings for the DTaP vaccine will be accepted, or receive regulatory approval in
a timely fashion or at all, by the FDA or any foreign regulatory authority.  See
"Risk Factors - Dependence Upon Approval and Commercialization of DTaP Vaccine."

         In 1995,  the  Company,  working  together  with the Health and Medical
Services of Goteborg, Sweden, began a mass vaccination project in Goteborg using
the Company's  acellular  pertussis vaccine to vaccinate,  free of charge,  more
than  40,000  infants  and  children,  representing  about  80% of the  eligible
pediatric  population in the Goteborg  metropolitan  area. Under the vaccination
project, newborn infants are receiving the Company's DTaP vaccine at 3, 5 and 12
months  of  age,  which  are  the  recommended   vaccination   ages  in  Sweden.
Additionally, pre-school children ages 1 to 5 years who have previously received
their required  vaccinations for diphtheria and tetanus will receive three doses
of the Company's  acellular  pertussis  vaccine.  This Swedish mass  vaccination
project,  which is providing the Company with  additional data on the widespread
use of the vaccine,  is not required in order to obtain regulatory  approval for
Certiva[TRADEMARK] and has not been requested by any regulatory agency.

         aP  VACCINE.   Adults  are  exposed  to  and  may  contract   pertussis
infections.  They also are considered a significant  reservoir of, and source of
pediatric  exposure  to,  pertussis.   The  Company  believes  that  sale  of  a
stand-alone  acellular  pertussis  vaccine may be appropriate  for adult booster
immunizations.  The Company participated in a safety and immunogenicity clinical
trial at Baylor  College  of  Medicine,  which was  completed  in 1995,  for the
purpose of  establishing  the safety and  immunogenicity  of the aP vaccine as a
booster in adults.  This clinical trial was sponsored by the National  Institute
of Allergy and  Infectious  Diseases  ("NIAID")  of the National  Institutes  of
Health,  and the results of this study  reveal that the  Company's aP vaccine is
highly   immunogenic  in  adults  with  no  vaccine  associated  severe  adverse
reactions.  The  Company  is  presently  considering  sponsoring  further  adult
clinical  trials in the United States using its aP vaccine.  As a next step, the
Company  intends to combine the aP vaccine with an adult  formulation of tetanus
and diphtheria toxoids ("Td") to create a tetanus-diphtheria-acellular pertussis
("TdaP")  vaccine for adults.  The clinical  research and development for a TdaP
vaccine are expected to be done  concurrently  with the clinical  development of
the aP vaccine. In addition, the Company intends to seek regulatory approval for
sale of the stand-alone aP vaccine for use in those jurisdictions outside of the
United  States  where  pertussis   vaccines  are  sold  and  administered  as  a
stand-alone  product,  although there can be no assurance that any such approval
will be granted.


                                     - 12 -
<PAGE>



         COMBINATION VACCINES

         The Company is developing  three  combination  vaccines  using the DTaP
vaccine as an "anchor."  Additional  vaccines would be added to the DTaP vaccine
to form the combination  vaccine. The Company anticipates that these combination
vaccines will become generally  acceptable because the ACIP recommended schedule
for  immunization  against  diphtheria,  tetanus,  pertussis,  polio and HIB are
compatible.  Combination  vaccines  have a number of benefits,  including  fewer
injections,  lower  anxiety  for the  parents  and  reduction  of the  number of
required  visits to the  physician,  thereby  lowering  costs  and  facilitating
compliance with recommended and mandated  immunization  programs.  The Company's
combination vaccines under development are described below.

         DTaP-IPV  VACCINE.  The  Company  believes  that a  single  vaccination
program for  diphtheria,  tetanus,  pertussis  and polio can be  established  by
combining  an  enhanced,  injectable  IPV  with its DTaP  vaccine.  The  Company
anticipates that a DTaP-IPV vaccine can become a generally accepted  multivalent
vaccine  because  the polio  vaccination  schedule is  compatible  with the DTaP
vaccination schedule,  and because a polio vaccination program that includes IPV
has been accepted as both safe and  efficacious.  In the United States,  the CDC
has issued a revised recommendation  related to polio vaccination.  A sequential
schedule,  including  two  doses of IPV  followed  by two  doses  of oral  polio
vaccination  ("OPV") is now the preferred  recommendation,  although a four dose
OPV or four dose IPV schedule is acceptable.

         In September  1996,  the Danish  National  Board of Health  granted SSI
regulatory  approval to market a combined DTaP-IPV vaccine,  which  incorporates
the Company's  acellular  pertussis toxoid, for all primary and booster doses in
infants and children.  Presently,  there is no other acellular pertussis vaccine
licensed for use in Denmark, and this is the first DTaP-IPV vaccine licensed for
use in Europe.

         SSI intends to prepare  regulatory  filings for the DTaP-IPV vaccine in
Sweden and other countries within its territory. The Company intends to file for
regulatory  approval of the DTaP-IPV  vaccine in other  European  countries.  In
addition,  the  Company in  collaboration  with  Abbott  intends to conduct  the


                                     - 13 -
<PAGE>



requisite  clinical  trials  in  order to file for  regulatory  approval  of the
DTaP-IPV  in the United  States.  There can be no  assurance  that data from the
clinical trials will support a regulatory filing or that any regulatory  filings
for the DTaP-IPV will be accepted,  or receive  regulatory  approval in a timely
fashion or at all, by other regulatory agencies. See "Government Regulation" and
"Risk Factors - Need for Regulatory Approvals." See "Business Relationships."

         DTaP-HIB   VACCINE.   The  Company  is  developing  a  combined  single
injectable  DTaP-HIB  vaccine  in  stable  liquid  form  for the  prevention  of
diphtheria,  tetanus,  pertussis and infection caused by HAEMOPHILUS  INFLUENZAE
type b. Preclinical test results of the Company's DTaP-HIB vaccine  demonstrated
high immune  responses for each of the  components  in the combined  vaccine and
showed no  interference  among the  different  components  of the  vaccine.  The
Company believes that the development of a safe and immunogenic DTaP-HIB vaccine
is  technologically  feasible,  and that a program  utilizing  that  vaccine can
become generally accepted for a number of the doses in the vaccination  schedule
because the vaccination schedules for diphtheria,  tetanus,  pertussis,  and HIB
are  compatible.   See  "Products  Under  Development  -  Conjugate  Vaccines - 
HAEMOPHILUS  INFLUENZAE  Type b Vaccine" for a description  of the Company's HIB
vaccine. See also "Competition." The Company is collaborating with Abbott in the
development of this vaccine. See "Business Relationships."

         DTaP-IPV-HIB  VACCINE. The Company is also developing a combined single
injectable  DTaP- IPV-HIB  vaccine in stable  liquid form for the  prevention of
diphtheria,  tetanus,  pertussis, polio and infection caused by HIB. Preclinical
test results of this vaccine  demonstrated high immune responses for each of the
components  in the  combined  vaccine  and  showed  no  interference  among  the
different  components of the vaccine.  The Company believes that the development
of a  DTaP-IPV-HIB  vaccine  is  technologically  feasible,  and that a  program
utilizing that vaccine can become  generally  accepted for a number of the doses
in the vaccination  schedule  because the vaccination  schedules for diphtheria,
tetanus,  pertussis,  polio and HIB are  compatible.  The  Company is planning a
Phase  III  clinical  trial  of  the  DTaP-IPV-HIB  vaccine  to  take  place  in
Scandinavia  in order to test the safety and  immunogenicity  of the  vaccine in
infants.  The Company is  collaborating  with Abbott in the  development of this
vaccine.  See "Business Relationships."  See also "Products Under Development -
Conjugate Vaccines - HAEMOPHILUS INFLUENZAE Type b Vaccine" for a description of
the Company's HIB vaccine.

         CONJUGATE VACCINES

         In recent decades,  vaccines have been developed for certain  bacterial
diseases using  polysaccharides  (long-chained sugars) which are attached to the
bacterium's outer membranes.  While these polysaccharide vaccines have generally
proven  to be safe,  many of them do not  elicit  an  adequate  immune response,


                                     - 14 -
<PAGE>



particularly  in infants whose immature  immune  systems do not recognize  these
polysaccharides. In an attempt to address this problem, the Company is utilizing
proprietary   conjugate   vaccine   technology   to   link   (i.e.,   conjugate)
polysaccharides  to protein  carriers,  which serve to enhance  the  immunogenic
properties of the polysaccharides.  The Company believes that conjugate vaccines
may prove as safe as and more effective than polysaccharide vaccines.

         The Company holds exclusive worldwide rights (excluding Canada) for the
development,   production  and  sale  of  vaccines  against  certain   bacterial
infections under a license granted by the National Research Council of Canada, a
Canadian  federal  government  agency  ("NRC"),  for certain  conjugate  vaccine
technology.  United States and, in some cases,  foreign patents relating to this
technology  have been issued and applied for. The Company also holds,  either as
assignee or licensee,  several  other  patents  related to the  development  and
manufacture of conjugate vaccines.  The Company is developing conjugate vaccines
for the diseases  discussed  below and,  where  appropriate,  intends to combine
certain of its  conjugate  vaccines  with its DTaP and  DTaP-IPV  vaccines.  See
"Products   Under   Development   -   Combination    Vaccines"   and   "Business
Relationships."

         GROUP B STREPTOCOCCAL  VACCINE. Group B streptococcal ("GBS") infection
affects both infants and adults in the United States.  GBS infections in infants
occur  principally  during the first three  months after birth and can result in
serious complications, including death, pneumonia or permanent brain damage from
meningitis.  GBS  disease  is also a  prominent  cause  of  peripartum  maternal
infections.  Since  there is no vaccine  for the  prevention  of GBS  disease in
adults or infants,  the CDC has issued guidelines for detecting and treating GBS
infections in pregnant women.  These guidelines,  which have been adopted by the
American  Academy of Pediatrics and the American  College of  Obstetricians  and
Gynecologists,  include  diagnostic  testing during the third trimester and, for
those infected, a course of intravenous  antibiotics during and after labor. The
initial  target  market for this vaccine will be women of  child-bearing  age. A
principal  benefit to such an  immunization  program is that the vaccine has the
potential to generate protective antibodies for both the mother and the infant.

         A Phase I/II  clinical  trial for a vaccine  against GBS  infection has
been completed  utilizing  patented  technologies  that the Company has licensed
from the NRC, the Brigham and Women's  Hospital,  and Harvard  University.  This
clinical  trial was  conducted  by the Brigham and Women's  Hospital  and Baylor
College of Medicine  under  sponsorship  of the NIAID.  The  clinical  trial was
designed  to examine  the safety and  immunogenicity  of the  vaccine in healthy
nonpregnant  women.  The results of this trial  revealed  that the GBS conjugate
polysaccharide  vaccine was well  tolerated with minimal  reactogenicity  and no
serious  side-effects.  Antibodies  elicited by immunization  with the conjugate
vaccine  displayed  protective  activity  against  GBS IN VITRO and IN VIVO.  In
addition,  the clinical  investigators  reported  that  the delivery  of a  GBS


                                     - 15 -
<PAGE>



polysaccharide   conjugate  vaccine  through  maternal  immunization  may  be  a
realistic  approach  to the  prevention  of  perinatal  GBS  infection  and that
antibodies  transported  through the placenta to the fetus may confer protective
immunity even to infants born prematurely between 34 and 37 weeks of gestation.

         MENINGOCOCCAL VACCINES. Meningitis is a serious infection involving the
fluid  surrounding  the brain and  spinal  cord,  which can lead to  significant
central  nervous system damage in all age groups,  although in the United States
those most often  stricken  are children and young  adults.  A leading  cause of
meningitis  worldwide is  meningococcus  A, B and C bacteria.  The  incidence of
meningitis  caused by  meningococcus  A, B and C varies from country to country.
Currently,  a polysaccharide vaccine for the prevention of meningococcal A and C
infections is administered to United States military personnel. This vaccine has
not been  demonstrated  to be protective in children less than two years of age.
In addition, there is currently no licensed conjugate vaccine for the prevention
of meningococcus B infection.

         Meningococcal  B  bacteria  have  been  responsible  for most  cases of
meningococcal meningitis in developed countries since the late 1940s, and in the
United  States  account for  approximately  one-half of the yearly cases of such
meningitis  (the other half being  attributable  principally to  meningococcal C
bacteria).  Epidemic  outbreaks  occurred in 1994-1995 in Florida and Texas, and
the incidence of meningitis  caused by  meningococcus  B is on the rise in South
America and Europe, particularly in Scandinavia. At the end of 1995, the Company
entered into agreements with Pasteur  Merieux-  Connaught to jointly develop the
Company's new conjugate vaccine against meningococcal B infection. See "Business
Relationships - Pasteur Merieux-Connaught Agreements."

         The Company is also developing conjugate vaccines against group A and C
meningococcal  disease and group A/C and A/B/C meningococcal  disease for adults
and infants.  The Company has completed  preclinical  development and testing of
its group A and group A/C meningococcal conjugate vaccines, as well as a Phase I
clinical trial of its Group C  meningococcal  conjugate  vaccine in adults.  The
results from the Phase I clinical trial revealed that the group C  meningococcal
vaccine  was  well  tolerated  with  minimal   reactogenicity   and  no  serious
side-effects.  Antibodies  elicited by immunization  with the conjugate  vaccine
displayed protective activity against  meningococcal C bacterial infection.  The


                                     - 16 -
<PAGE>



Company is  presently  planning  to  commence a Phase II  clinical  study of the
vaccine in infants to assess the safety and  immunogenicity of the vaccine after
a three-dose primary series. The World Health Organization ("WHO") has indicated
its willingness to sponsor  further  clinical trials in children for the group C
meningococcal vaccine,  although there can be no assurance that such sponsorship
ultimately  will be  provided.  The  clinical  development  and testing of these
vaccines are expected to take several years to complete.

         HAEMOPHILUS INFLUENZAE TYPE B VACCINE. HIB has been a frequent cause of
meningitis  and other serious  infections in infants and children.  The ACIP has
issued a  recommendation  for universal  vaccination  of children for protection
against  diseases  caused by HIB.  Vaccination  against HIB  consists of primary
doses  administrated  at the ages of two, four and six months and a booster dose
administered  at  between  12 to 15 months of age.  Children  infected  with HIB
bacteria can develop meningitis, which can lead to blindness, deafness, acquired
mental  retardation or death.  The peak incidence of HIB infection in the United
States  occurs in  children  between  six and 18 months of age.  The  Company is
pursuing  efforts to develop a conjugate  vaccine against HIB for use in infants
and for possible use in the Company's combination vaccines.  See "Products Under
Development - Combination  Vaccines." The Company has completed its  preclinical
development of this vaccine.  Three  manufacturers are currently licensed by the
FDA to sell HIB conjugate vaccines for use in all primary and booster doses.
See "Competition."

         GROUP A STREPTOCOCCAL  VACCINE. Group A streptococcal disease occurs in
all age groups with a predominance in school-age children. Group A streptococcus
causes  infections  ranging  from  severe  sore  throat and sinus  infection  to
pneumonia and, if not treated,  acute rheumatic  fever.  Currently,  there is no
vaccine  licensed by the FDA to prevent  Group A  streptococcal  infection.  The
Company is engaged in the research  and  development  of a conjugate  vaccine to
prevent this infection. Activities on this vaccine are in the preclinical stage.

         PNEUMOCOCCAL  (OTITIS  MEDIA)  VACCINE.  Otitis  media,  or middle  ear
infection,  is a common illness in the United States  afflicting  children under
five  years  of age.  The  majority  of  bacterial  cases  are  attributable  to
pneumococcal  organisms.  Chronic  otitis media can lead to hearing  defects and
associated learning and language  disabilities.  There is no vaccine licensed by
the FDA that prevents otitis media caused by pneumococcal  bacteria. The Company
is  pursuing  efforts to  develop a  conjugate  vaccine to prevent  pneumococcal
otitis media. This vaccine is currently in the preclinical stage of development.


                                     - 17 -
<PAGE>



         PNEUMOCOCCAL   VACCINE.   There  are  in  excess  of  20  serotypes  of
pneumococcal bacteria that cause pneumonia, a respiratory infection that affects
individuals of all ages, as well as other infections.  The present  pneumococcal
vaccine  is  a  multivalent   polysaccharide  vaccine  recommended  for  adults,
particularly  elderly  and  other  patients  with a  high  risk  of  contracting
pneumonia.  The  Company  is  currently  in  the  basic  research  stage  of the
development of a multivalent conjugate vaccine against pneumococcus.

         OTHER VACCINES

         VIRAL  INFLUENZA.  The  Company  holds  exclusive  rights in the United
States to vaccine products  acquired by BioChem from Institut Armand Frappier of
Quebec,  Canada.  Included  among those vaccines is a viral  influenza  vaccine,
which has been  commercially  marketed and sold by BioChem in Canada for several
years.  The manufacture  and marketing of viral  influenza  vaccine is seasonal.
Historically in the United States, the strains to be used for influenza vaccines
are  provided  to  manufacturers  by the CDC in the  spring  of each  year,  and
manufacturers  introduce  the  vaccine in the fall  through  early  winter.  The
Company may seek to obtain FDA approval for the viral  influenza  vaccine in the
United States.  There are no assurances that the Company will receive regulatory
approval or that,  if received,  the vaccine will be  successfully  marketed and
sold. See "Risk Factors - Need for Regulatory Approval."

         OTHERS. The Company,  utilizing patented and proprietary  technologies,
is performing  research on and  developing  other adult and pediatric  vaccines,
which it selects for development  based on the anticipated need for a particular
product,  the  nature of the  competition,  and the  ability  of the  Company to
develop the  product,  among other  factors.  These  vaccines,  which  currently
include  vaccines to prevent urinary tract infections and typhoid fever, are all
in basic research or preclinical  stage of development.  The Company's  research
and development efforts are being conducted  independently and in conjunction or
in  collaboration  with  governmental  agencies and  universities.  There are no
assurances that any of these vaccines will enter clinical trials or successfully
be  developed  or  licensed  by the FDA or any other  regulatory  authority  for
commercial sale.

MARKETING OF VACCINES

         An objective  of the Company is to become a leader in the  development,
production  and  marketing of  state-of-the-art  vaccines for the  prevention of
infectious  diseases in children and adults.  In pursuing  this  objective,  the
Company,  considers among other things,  collaborations  with pharmaceutical and
other  vaccine  manufacturers  where  appropriate  to maximize  the value of the
Company's  products and  technologies.  To maximize  market  penetration for its
first commercial products within the least amount of time, the Company currently
is implementing a marketing strategy aimed at establishing  marketing  alliances
in the United States, Europe and other territories with  well-established  local
partners  on a country-by-country  basis.  Thereafter,  the Company  intends to
develop,  where  appropriate  and feasible,  an internal  sales force to succeed



                                     - 18 -
<PAGE>



these alliances following expiration of the respective agreements.  Towards this
end, the Company has entered into marketing  alliances for certain products with
Abbott in the United States,  Chiron Behring  ("Behring") in Germany and Austria
("Behring's  Territory") and SSI in the  Scandinavian,  Baltic and certain other
countries ("SSI's  Territory").  The Company will continue to seek distribution,
marketing,  joint venture and similar  arrangements  with third parties in other
territories and for other products where, in the judgement of the Company,  such
arrangements  would be beneficial  to the  successful  commercialization  of its
products.  See "Business  Relationships."  All of the Company's product sales in
1996 were for export from the United States and were stated in U.S. dollars. See
Item 7 - Management's Discussion and Analysis of Financial Condition and Results
of Operation.

         In addition to establishing these commercial alliances,  the Company is
developing an internal marketing and sales organization and is preparing for the
product  launch of  Certiva[TRADEMARK]  in the  United  States  upon  receipt of
regulatory approval. The Company intends to market  Certiva[TRADEMARK]  directly
to federal and state governments through established purchasing programs. In the
United States,  federal and state governments  currently  purchase a substantial
portion of pediatric  vaccines  sold,  and the Company  expects that the federal
government  will continue its  historical  practice of purchasing  pertussis and
other vaccines from multiple  licensed  commercial  manufacturers  through these
established programs, although there are no assurances in this regard. This is a
forward  looking  statement  made pursuant to the safe harbor  provisions of the
Private  Securities  Litigation Reform Act of 1995.  Forward looking  statements
inherently  involve  risks and  uncertainties  which may  affect  the  Company's
business  and  prospects,  including  without  limitation  the  requirement  for
regulatory  approval of products by the FDA,  nature of  competition,  effective
marketing, and uncertainties relating to clinical trials, all as discussed under
the heading  "Risk  Factors",  below.  See "Risk Factors - Changes in Government
Purchasing  Policies," "Risk Factors - No Assurance of Effective  Marketing" and
"Risk Factors - Need for Regulatory Approvals."  Presently,  the U.S. government
is  continuing  with  multiple  contract  awards for the  purchase of its annual
requirements  of  DTaP  vaccine.   Under  these  contracts,   vaccine  suppliers
effectively will not be guaranteed any minimum purchase  requirements,  but they
will be  provided  the  opportunity  to revise  their  contract  proposals  on a
quarterly basis.

         To successfully  introduce and commercialize  Certiva[TRADEMARK] in the
United States, the Company will be required,  among other things, to participate
in  established  purchasing  programs  of  Federal  and  state  governments,  to
establish an identity and reputation for the Company and its products, to create


                                     - 19 -
<PAGE>



an awareness among  pediatricians of the safety and efficacy of the vaccine,  to
distinguish the Company's  products from that of its  competitors,  to establish
the Company as an effective and reliable supplier of vaccines,  and to establish
effective distribution channels. There can be no assurance that the Company will
be able to successfully market its vaccine products,  that its existing business
relationships  will  prove  to be  commercially  successful,  or  that  it  will
successfully  negotiate and execute any additional commercial  arrangements with
third parties. See "Business  Relationships,"  "Competition" and "Risk Factors -
No Assurance of Effective Marketing."

BUSINESS RELATIONSHIPS

         PERTUSSIS  LICENSE  AGREEMENT.  The  process  by  which  the  Company's
pertussis  toxin is inactivated is the subject of a United States patent held by
the  United  States  Government,  which  has been  licensed  exclusively  to the
Company.  The patent is  scheduled  to expire on June 16,  2006.  The  Company's
exclusive  rights will expire seven years from the date of the first  commercial
sale of the product in the United States following licensing of such product for
general  use by the FDA.  The  Company  is  required  to pay the  United  States
Government a royalty  based on net sales of a vaccine that utilizes the patented
technology. Foreign patent applications covering this technology have been filed
and ten unexpired  foreign patents are issued with expiration dates ranging from
2002 to 2007. The Company has acquired a  royalty-bearing  exclusive license for
the use of the patented  technology  in all such foreign  jurisdictions  for the
full term of the patents.  See "Products Under Development - Acellular Pertussis
Vaccines."

         CANADIAN  GOVERNMENT  LICENSE  AGREEMENTS.  The Company is the assignee
under  two  license  agreements  between  BioChem  and the  Canadian  Government
covering the conjugate technology being developed by the Company.  These license
agreements  currently cover a total of twenty-two issued patents with expiration
dates  ranging from 1997 to 2013,  and the Company and the  Canadian  Government
have applied for additional patents,  which, if issued, would be licensed to the
Company  under these  agreements.  The  Company is required to pay the  Canadian
Government royalties on the sale of licensed vaccines.  In the event of a change
in  control  of the  Company,  the  Canadian  Government  retains  the  right to
terminate  both  agreements if it believes such change in control is detrimental
to the Canadian  Government.  The Canadian  Government  also can  terminate  the
license  agreements if all reasonable  efforts are not being used to exploit the
technology  commercially with due diligence.  Under one license  agreement,  the
Company  has  the  exclusive   worldwide  rights  (excluding   Canada)  for  the
development,  production  and sale of vaccines  produced in accordance  with the
conjugate  vaccine  technology  covered by the  license.  The  vaccines  covered
include, among others, those against meningococcal,  HAEMOPHILUS INFLUENZAE type
b, group B streptococcal and pneumococcal infections. The term of the license is
co-extensive with the term of the patents. Currently, the last-to- expire patent
licensed under this  agreement is scheduled to expire in 2013.  Under the second
license  agreement,  the Company has the exclusive  worldwide rights  (excluding
Canada) for the  development,  production and sale of a vaccine  against group B
meningococcal  disease produced in accordance with the licensed technology.  The
term of the license is  co-extensive  with the terms of the patents.  Currently,
the  last-to-expire  patent licensed under this agreement is scheduled to expire
in 2013. See also "Products Under Development - Conjugate Vaccines."


                                     - 20 -
<PAGE>



         STATENS  SERUMINSTITUT SUPPLY AGREEMENTS.  In 1991, the Company and SSI
executed a supply  agreement  under  which SSI is required to supply the Company
with its  requirements  of  diphtheria  and  tetanus  toxoids  to be used by the
Company for developing,  producing and selling the DTaP vaccine, either alone or
as a  combination.  The Company has been using,  and intends to continue to use,
these diphtheria and tetanus toxoids in producing its DTaP vaccine. In the event
SSI fails to continue to supply the Company with these  components,  the Company
has a royalty-bearing license to produce the diphtheria and tetanus toxoids. The
Company's  right to purchase  diphtheria  and  tetanus  toxoids for sale of such
products is exclusive in North America and the United  Kingdom and  nonexclusive
in the rest of the world and excludes SSI's  Territory.  The contract has a term
of 20 years. The Company and SSI also have entered into another supply agreement
pursuant to which the Company has agreed,  on an exclusive  basis, to supply SSI
with the pertussis  toxoid for  combination  with diphtheria and tetanus toxoids
either alone or together with other antigens for sale in SSI's Territory.

         In February 1992, the Company signed two additional  supply  agreements
with SSI.  Under the first  supply  agreement,  SSI has agreed,  on an exclusive
basis,  to provide the Company with  diphtheria  and tetanus  toxoids for use as
carrier  proteins in the development and manufacture of the Company's  conjugate
vaccines.  In the event that SSI fails to continue  to supply the  Company  with
these  components,   the  Company  has  a  royalty-bearing  license  to  produce
diphtheria  and  tetanus  toxoids  for this  purpose.  Under the  second  supply
agreement, the Company has agreed, on an exclusive basis, to supply SSI with its
conjugate vaccines that utilize SSI's diphtheria or tetanus toxoids as a carrier
protein, solely for use by SSI in combination with DTaP and DTaP-IPV vaccines in
SSI's  Territory.  SSI's right to market and sell these products is exclusive in
SSI's Territory. These agreements have a term of 20 years.

         STATENS SERUMINSTITUT RESEARCH AND DEVELOPMENT AGREEMENT.  In 1991, the
Company entered into a research and  development  agreement with SSI under which
the parties agreed to collaborate on the development of a DTaP-IPV vaccine.  See
"Products  Under  Development -  Combination  Vaccines."  The agreement  permits
either  party to add other  antigens to the DTaP-IPV  product.  Once the Company
obtains  regulatory  approval,  and commences sales of the DTaP-IPV product,  it
will be required to make royalty payments to SSI. SSI is required to sell to the
Company all of its requirements of IPV for the purpose of developing,  producing
and selling the DTaP-IPV product,  either alone or together with other antigens.
The contract has a term of 20 years.

         STATENS  SERUMINSTITUT  DISTRIBUTION  AGREEMENTS.  The Company has been
designated the exclusive distributor in North America and the United Kingdom for
SSI's  diphtheria,  tetanus  and IPV  vaccines.  Additionally,  SSI  will be the
exclusive distributor in SSI's Territory for the conjugate vaccines manufactured
using the  components  supplied to the  Company by SSI.  These  agreements  were
executed in February 1992, and each agreement has a term of 10 years.


                                     - 21 -
<PAGE>

 

         TECHNOLOGY TRANSFER AGREEMENT WITH BIOCHEM. In 1990, in addition to the
conjugate  vaccine  technologies  described  above,  BioChem  transferred to the
Company all rights to certain vaccine  technologies and granted to the Company a
paid-up exclusive right (excluding Canada) and license to other technologies for
vaccine  applications,   including  those  relating  to  monoclonal  antibodies,
synthetic  peptides and  adjuvants.  The licenses  granted under this  agreement
generally  will not terminate  until the  expiration of the last valid patent or
copyright anywhere in the world for the licensed  technologies or until the last
portion of the technologies  protected by trade secrecy enters the public domain
everywhere in the world, whichever occurs last. Currently, this agreement covers
seven foreign patents with expiration dates that range from 2007 to 2011.

         PASTEUR  MERIEUX-CONNAUGHT  AGREEMENTS. At the end of 1995, the Company
entered  into a clinical  development  agreement  and a license  agreement  with
Pasteur  Merieux-Connaught  under which both parties  will  jointly  develop the
Company's  new  conjugate  vaccine  against  meningococcus  B for both adult and
pediatric  indications.  Total fees and  payments  to the  Company  under  these
agreements  would  amount to $52 million  upon  achievement  of all clinical and
regulatory   milestones.   In  addition,   Pasteur   Merieux-Connaught  will  be
responsible  for all  costs  associated  with the  clinical  development  of the
vaccine through the completion of Phase II clinical trials.  See "Products Under
Development - Conjugate Vaccines - Meningococcal Vaccines."

         To   date,   the   Company   has   received   payments   from   Pasteur
Merieux-Connaught   in  connection   with  the  execution  of  a  memorandum  of
understanding  and  for  development  funding  under  the  clinical  development
agreement  in the amount of $7 million.  Further  fees and funding  will be made
upon  achievement  of  development,  clinical and regulatory  milestones.  Total
remaining fees and payments to the Company, upon achievement of all clinical and
regulatory  milestones,  amount  to  $45  million.  See  Item  7 -  Management's
Discussion and Analysis of Financial Condition and Results of Operation.

         Under the terms of the  license  agreement,  Pasteur  Merieux-Connaught
will  hold   co-exclusive   world-wide   rights  to  manufacture  and  sell  the
meningococcus  B vaccine both as a stand-alone  product and in combination  with
other  vaccines.  The Company  will  retain  co-exclusive  world-wide  rights to
manufacture and sell the  meningococcus B vaccine both as a stand-alone  product
and in combination with other vaccines.  With limited exceptions,  neither party
may grant  sublicenses  under the technology.  Following first product approval,
the Company will  receive  annual  minimum  royalties  and running  royalties on
product sales by Pasteur Merieux-Connaught. Pasteur Merieux-Connaught is subject
to specific diligence obligations and performance  milestones in the development
and   commercialization   of   the   vaccine.   The   obligations   of   Pasteur
Merieux-Connaught  will be  reduced  in the event of a change of  control of the
Company involving certain specified corporations.  The license agreement must be
ratified by the NRC and will not become  operational until a pre-clinical  study
is successfully  completed.  The license  agreement may be terminated by Pasteur
Merieux-Connaught  in its sole discretion at any time with advance  notice.  The
Company may terminate  the license  agreement  upon Pasteur  Merieux-Connaught's
default or its failure to meet its  obligations  under the clinical  development
agreement.


                                     - 22 -
<PAGE>



         Under the terms of the clinical development agreement, the parties will
jointly  develop the vaccine  through Phase II clinical  trials,  and each party
will have access to and the right to use the  clinical  trial  results.  Pasteur
Merieux-Connaught will be responsible for all costs associated with the clinical
development of the  meningococcus  B vaccine  through the completion of Phase II
clinical trials. Pasteur  Merieux-Connaught's  obligations will terminate upon a
change of control of the Company with certain  specified  corporations.  Pasteur
Merieux-Connaught  is subject to specific diligence  obligations and performance
milestones  in  the  development  and  commercialization  of  the  vaccine.  The
agreement may be terminated by Pasteur  Merieux-Connaught in its sole discretion
at any time with advance notice.

         ABBOTT LABORATORIES  AGREEMENT. In October 1996, the Company and Abbott
signed a definitive agreement under which Abbott would market Certiva[TRADEMARK]
when  approved by the FDA.  The  marketing  agreement  also will allow Abbott to
market the Company's DTaP-HIB,  DTaP-IPV and DTaP-IPV-HIB  combination  vaccines
which are under development.

         Abbott  will  market  Certiva[TRADEMARK]  and  combination  vaccines to
private   physicians   and  managed  care  markets  in  the  United  States  for
immunization of infants and children. The Company will market Certiva[TRADEMARK]
and  the  combination  vaccines  to  government   purchasers,   including  state
governments and the CDC.

         On execution of the  agreement  with Abbott,  the Company  received $13
million of which $6.3  million  represented  payment for  350,000  shares of the
Company's  Common  Stock,  and the balance  represented  a  marketing  fee and a
clinical  development  payment.  The Company and Abbott will  collaborate in the
clinical  development of the combination  vaccines,  and Abbott will provide the
Company with clinical  development  funding.  The Company will receive  payments
upon  achievement  of prescribed  milestones.  The agreement  provides for total
payments  of up to $42  million by Abbott.  The first  milestone  relates to FDA
approval of Certiva[TRADEMARK]  provided certain other conditions are satisfied.
In  addition,  the Company  will  receive  revenues  from Abbott as it purchases
Certiva[TRADEMARK]  and the  combination  vaccine  products  for  resale  to the
private  pediatric  market.  Each  party  is  subject  to  prescribed  diligence
obligations. The agreement will expire on the expiration of the patents covering
the products to be marketed.  In addition,  the  agreement  may be terminated by
Abbott in its sole  discretion  at any time with  advance  notice.  See Item 7 -
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operation.


                                     - 23 -
<PAGE>



         OTHER  RELATIONSHIPS.  The Company  holds  licenses and other rights to
additional  technologies  that the  Company  is  researching  and/or  developing
jointly  with various  research  institutions.  In  addition,  the Company is in
various  stages of  discussions  with  third  parties,  including  multinational
pharmaceutical  companies,  regarding various business  arrangements,  including
acquisitions,  licensing,  research and  development,  distribution,  marketing,
joint  venture and other  business  agreements,  some of which  possibly  may be
concluded  in the near  term.  There are no  assurances  that the  Company  will
successfully  negotiate and sign any such  agreement or that,  if executed,  the
financial terms of any such agreement will be significant.

COMPETITION

         Competition in the vaccine  industry is intense.  The Company will face
competition  from many  companies,  including  a number of large  companies  and
specialized  firms in the  United  States  and  abroad  that are  engaged in the
development  and  production of vaccines,  and major  universities  and research
institutions.  Many of the  Company's  competitors  have  substantially  greater
financial and other resources,  more extensive experience in conducting clinical
testing and obtaining regulatory approvals for their products, greater operating
experience,  larger research and development and marketing  staffs,  and greater
production capabilities than those of the Company. The Company believes that the
principal  competitive  factors in the vaccine  industry  are  product  quality,
measured by the safety and efficacy of a vaccine product, ease of administration
(represented  by  combination  vaccines and  vaccines  that are stable in liquid
form) and price. See "Marketing of Vaccines."

         The  Company  believes  that its  principal  competitors  in the United
States are Merck & Co., Pasteur Merieux-Connaught,  SmithKline Beecham plc., and
Lederle Laboratories (a subsidiary of American Home Products), most of which are
active in the  development  of acellular  pertussis,  combination  and conjugate
vaccines for use in infants and  children.  For  example,  during 1996 and 1997,
three  companies  announced  that they had  received FDA approval for their DTaP
vaccine for infants and children.  One of these  competitors also announced that
the FDA licensed a vaccine that combines by reconstitution that


                                     - 24 -
<PAGE>



company's HIB vaccine with its DTaP vaccine for  administration  at 15-18 months
of age and that it continues to seek FDA  approval  for  administration  at two,
four and six months of age. In addition,  several  competing  DTaP  vaccines and
certain  combination  vaccines have been licensed for sale outside of the United
States. See "Risk Factors Competition and Technological Change."

PATENTS AND PROPRIETARY INFORMATION

         The Company  actively  pursues a strategy of seeking patent  protection
for valuable  patentable  subject matter.  The Company  believes that patent and
trade secret  protection  is an  important  element of its business and that its
success will depend in part on its ability to obtain strong patents, to maintain
trade secret protection and to operate without infringing the proprietary rights
of third parties. The Company holds as assignee and licensee a number of patents
and patent applications. See "Business Relationships" and "Risk Factors - Patent
Protection and Proprietary Information."

         The Company also relies upon trade  secrets,  know-how  and  continuing
technological  advancement  to develop and  maintain its  competitive  position.
Disclosure  and use of the  Company's  know-how is  generally  controlled  under
agreements   with  the  parties   involved.   In   addition,   the  Company  has
confidentiality  agreements  with its key employees,  consultants  and officers.
There can be no assurance that  disclosure of the Company's  trade secretes will
not occur, or that others will not  independently  develop and patent equivalent
technology.


                                     - 25 -
<PAGE>



GOVERNMENT REGULATION

         The Company is currently subject to regulation by various  governmental
agencies and to Federal and other laws.  United  States and foreign  regulations
will be a significant  factor in the  production  and marketing of the Company's
products  and are  currently a  significant  factor in its ongoing  research and
development activities. In order to test, produce and market vaccines, mandatory
procedures  must be  followed  to  ensure  that  safety,  quality  and  efficacy
standards  established by the FDA and comparable  agencies in foreign  countries
are  satisfied.  See also  "Risk  Factors -  Changes  in  Government  Purchasing
Policies" for a description of regulatory and legislative  initiatives  that may
affect the marketing and distribution of vaccines.

         In the United States, the marketing of human vaccines is subject to FDA
review  and  approval.  The steps  required  before a new human  vaccine  can be
marketed include: preclinical studies; the filing of an investigational new drug
application  ("IND") with the FDA; clinical trials in humans to determine safety
and efficacy;  FDA approval of the product for commercial sale; and FDA approval
of the production-related facilities. The results of the preclinical studies and
human clinical trials are submitted to the FDA in a product license application,
or PLA,  approval of which must be obtained prior to  commencement of commercial
sales. The FDA may deny a PLA if, among other reasons,  clinical trial protocols
are not adequate or appropriate.  The FDA also may require additional testing or
information to assess the safety and efficacy of a company's products if the FDA
does not view the PLA as containing adequate evidence of the safety and efficacy
of the  product.  Notwithstanding  the  submission  of  such  data,  the FDA may
ultimately decide that the application does not satisfy its regulatory  criteria
for  approval.  Even if the PLA is  approved,  the  product  may be  required to
undergo  post-licensure  testing  and  surveillance  to  continue to monitor its
safety and effectiveness.  At this stage,  product approvals may be withdrawn if
compliance  with  regulatory  standards is not  maintained or if problems  occur
following initial marketing.  These regulatory  standards relate to, among other
things,  manufacturing,  testing,  labelling,  advertising  and  marketing.  The
interval between the filing of an IND and the filing of a PLA application can be
lengthy and in some instances the data obtained from clinical trials  authorized
under an IND do not support the filing of a PLA.

         The product  manufacturing and support facilities also must be licensed
for the production of vaccines.  To accomplish  this, an  establishment  license
application  ("ELA")  must  be  filed  with  the  FDA.  The  ELA  describes  the
facilities,  equipment and personnel involved in the manufacturing  process.  An
establishment  license is granted on the basis of inspections of the applicant's


                                     - 26 -
<PAGE>



facilities in which the primary  focus is on compliance  with FDA's current good
manufacturing  practices  ("CGMP") and the  applicant's  ability to consistently
manufacture  the product in the facility in accordance  with the PLA. If the FDA
finds  the  inspection  unsatisfactory,  it may  decline  to  approve  the  ELA,
resulting in a delay in production or  distribution  by the applicant.  Although
reviewed separately,  approval of both the PLA and ELA must be received prior to
commercial marketing of a vaccine.

         Presently,   there  are  a  number  of  legislative  initiatives  being
considered in Congress and proposed  regulations under consideration by the FDA,
which if adopted, could reform the FDA's review and approval processes by, among
other  things,  streamlining  the product  licensing  application  processes for
biologics, including vaccines. Some of these proposals are designed to eliminate
the  requirement for ELAs and to simplify the approval  process.  The Company is
unable to predict  which  legislative  or regulatory  initiatives,  if any, will
ultimately  be enacted or the effect  that any such  initiative  may have on the
FDA's application or approval process for the Company's DTaP and other vaccines,
or on the Company's business or results of future operations.

         The FDA  Export  Reform  and  Enhancement  Act of  1996,  which  became
effective  on April 26,  1996,  revised  the terms and  conditions  under  which
biologics may be exported. The legislation was designed to facilitate the export
of drugs, including biologics, by revising and in some circumstances eliminating
the requirement  for FDA approval as a condition of export.  The new legislation
now  permits,   in  most  cases,  a  company  to  commercially  export  vaccines
manufactured in the United States with little or no prior FDA review or approval
before  these  vaccines  are  licensed  by the FDA for  marketing  in the United
States.

         Preclinical  studies  are  conducted  in the  laboratory  and in animal
systems to evaluate the safety and potential  efficacy of vaccines.  The results
of these  preclinical  studies are submitted as part of the IND.  Human clinical
trials may  commence  if, 30 days after  receipt by the FDA of the IND,  the FDA
does not notify  the IND  applicant  that the  trials are  subject to a clinical
hold.

         Clinical trials involve the administration of the  investigational  new
vaccine  to  healthy  volunteers  or to  patients,  under the  supervision  of a
qualified  principal  investigator.  Clinical trials are conducted in accordance
with certain  standards under protocols that detail the objectives of the study,
the  parameters  to be used to monitor  safety and the  efficacy  criteria to be


                                     - 27 -
<PAGE>



evaluated.  Each  protocol  must be  submitted  to the  FDA as part of the  IND.
Further,  each  clinical  study  must be  conducted  under  the  auspices  of an
independent  Institutional  Review Board ("IRB") at the institution at which the
study will be conducted or by a qualified  centralized  independent IRB. The IRB
must approve the study to be conducted.  In its review,  the IRB will  consider,
among  other  things,  ethical  factors,  the safety of human  subjects  and the
possible liability of the institution.

         Clinical trials are typically conducted in three sequential phases, but
the phases may overlap. In Phase I, the initial introduction of the vaccine into
healthy  human  subjects,  the vaccine is tested for safety  (adverse  effects),
optimal dosage,  and its ability to induce an immune response  (immunogenicity).
Phase II involves  studies in a limited  target  patient  population  to further
evaluate  immunogenicity  and optimal dosage,  and to identify  possible adverse
effects and safety risks.  When a product is found to have an acceptable  safety
profile in Phase II  evaluations,  Phase III clinical  trials are  undertaken to
evaluate  clinical  efficacy and to further  test for safety  within an expanded
target patient population at geographically dispersed clinical study sites.

         Clinical trials generally  require several years to complete and may be
very costly.  To date,  the Company has been  successful in reducing the cost of
clinical trials by obtaining third-party  sponsorship of the clinical trials for
its first vaccine products. The Company, where appropriate, may continue to seek
third-party sponsorship or funding for clinical trials for its vaccine products.
There can be no assurance that such sponsorship or funding,  if sought,  will be
obtained.

         The Company's  activities  are subject to specific  government  quality
assurance  regulations.  The CGMP regulations set specific  requirements for the
production of biologics,  including vaccines,  and similar requirements are also
in effect in the European  Union and other foreign  countries  where the Company
has applied or may apply for  regulatory  approval for clinical  studies  and/or
marketing  of its  vaccines.  The  Company's  research and  operations  also are
subject  to  regulation  by the  Occupational  Safety  and  Health  Agency,  the
Environmental  Protection  Agency,  the  Department  of  Agriculture,   and  the
Department of  Transportation.  The Company also is subject to regulation  under
the Toxic  Substances  Control Act, the Resource  Conservation and Recovery Act,
and  other  regulatory  statutes,  and may in the  future  be  subject  to other
Federal, state, local or foreign regulations. The Company's compliance with laws
that  regulate  the  discharge of materials  into the  environment  or otherwise
relate to the protection of the  environment  does not have a material effect on
the ongoing  operations  of the  Company.  The Company has not made any material
expenditures for environmental  control  facilities,  nor does it anticipate any
such expenditures during the current fiscal year.

RAW MATERIALS

         Laboratory  supplies utilized in the Company's research and development
generally are available from several  commercial  suppliers under standard terms
and conditions.  Most raw materials necessary for process development,  scale-up
and commercial  manufacturing are generally  available from multiple  commercial
suppliers. However, certain processes require raw materials from sole sources or
materials  that are  difficult  for  suppliers  to  produce  and  certify to the


                                     - 28 -
<PAGE>



Company's  specifications.  In addition, the Company may experience temporary or
permanent shortages of critical raw materials necessary for continued production
of its vaccines.  Accordingly,  given the specific  nature of, and critical need
for, certain raw materials,  there is a risk that material shortages could delay
production  efforts,  adversely  impact  production  costs and yields,  and even
necessitate  the use of substitute  materials.  Any of these events could have a
significant adverse impact on the Company's operations. See also "Risk Factors -
Dependence on Suppliers."

PRODUCT LIABILITY

         The  testing and  marketing  of  vaccines  entail an  inherent  risk of
product  liability  attributable  to unwanted  and  potentially  serious  health
effects.  The extent of this risk was  sufficiently  great in the United  States
that,  by the  mid-1980s,  many  manufacturers  ceased  production  of pediatric
vaccines because of liability exposure.

         In response to these  withdrawals  from the  vaccine  market,  Congress
enacted the NCVI Act to ensure the availability of government mandated pediatric
vaccines by addressing the liability of manufacturers  for  immunization-related
injuries. Among other things, the NCVI Act created a trust fund, supported by an
excise tax on each dose of vaccine sold, to compensate eligible injured parties.
Compensation  awards are statutorily  established  and are generally  limited to
actual  and  projected   unreimbursed  medical,   rehabilitative  and  custodial
expenses,  lost  earnings,  and pain and  suffering,  together  with  reasonable
attorneys' fees.  Injured parties are not allowed to bring a lawsuit against the
manufacturer  unless they have filed a claim with the program,  received a final
determination  and  rejected  it in favor of  litigation.  The NCVI Act may not,
however,  protect  vaccine  manufacturers  against suits by family members of an
injured party. See "Overview of Vaccine Market."

         As the  vaccines  covered  by the NCVI  Act  include  vaccines  for the
prevention of diphtheria,  tetanus,  pertussis and polio, the Company's DTaP and
IPV vaccines have certain  protection from liability  claims.  While none of the
Company's  other  products are  presently  covered by the NCVI Act, from time to
time  there are  legislative  and  regulatory  proposals  to expand  the list of
vaccines  covered by, and reduce the excise  taxes that fund,  the  program.  In
1997,  varicella,  hepatitis B and HIB vaccines were added to the program's list
of covered  vaccines  provided that Congress  establishes an excise tax for such
vaccines.  In  addition,  the  Company  is unable to predict  whether  any other
legislative or regulatory  proposal will ultimately be enacted or the effect any
of these proposals may ultimately  have on the Company's  business or results of
future operations.

         The  Company has  limited  product  liability  insurance  coverage.  It
intends to seek additional insurance coverage as it commences  commercialization
of  its  vaccines,  but  there  can be no  assurance  that  adequate  additional
insurance  coverage will be available at acceptable  costs, if at all, or that a
product  liability claim would not materially  adversely  affect the business or
financial  condition  of the  Company.  See "Risk  Factors - Product  Liability;
Limited Insurance."


                                     - 29 -
<PAGE>



EMPLOYEES

         As of December 31,  1996,  the Company had 206  full-time  employees of
whom 28 have Ph.D.  degrees and two have M.D. degrees.  Of these employees,  133
were engaged in research, development and production activities, 31 were engaged
in administration, and 42 were engaged in quality/regulatory and related aspects
of the  Company's  operations.  The  Company  considers  its  relationship  with
employees to be satisfactory.

RISK FACTORS

         IN ADDITION TO THE OTHER  INFORMATION  INCLUDED  HEREIN,  THE FOLLOWING
RISK FACTORS  SHOULD BE CAREFULLY  CONSIDERED.  THIS ANNUAL  REPORT ON FORM 10-K
CONTAINS  CERTAIN  FORWARD  LOOKING  STATEMENTS  WITHIN THE  MEANING OF AND MADE
PURSUANT TO THE SAFE HARBOR  PROVISIONS  OF THE  PRIVATE  SECURITIES  LITIGATION
REFORM ACT OF 1995, WHICH STATEMENTS  INHERENTLY INVOLVE RISKS AND UNCERTAINTIES
THAT MAY AFFECT THE  COMPANY'S  BUSINESS AND  PROSPECTS.  THE  COMPANY'S  ACTUAL
RESULTS  MAY DIFFER  SIGNIFICANTLY  FROM THE  RESULTS  DISCUSSED  IN THE FORWARD
LOOKING STATEMENTS.  FACTORS THAT MIGHT CAUSE SUCH A DIFFERENCE INCLUDE, BUT ARE
NOT LIMITED TO, THOSE DISCUSSED IN THIS SECTION.

         DEPENDENCE  UPON APPROVAL AND  COMMERCIALIZATION  OF DTaP VACCINE.  The
Company  has  generated  only  limited  revenue  from the sale of its  acellular
pertussis  vaccine.  Prior to commercial  introduction,  the Company's  DTaP and
combination  vaccines must be approved by the FDA for sales in the United States
and by  similar  authorities  for sales in other  countries.  In 1996,  the DTaP
vaccine was  approved  for sale in Sweden and the DTaP-IPV was approved for sale
in Denmark. The DTaP vaccine is currently being considered for approval for sale
in the United States by the FDA. There can be no assurance as to when or whether
the Company will receive such  approval,  or that any such  approval will not be
subject to additional testing requirements.  The commercial  introduction of the
Company's DTaP vaccine will require the Company to manufacture and produce large
quantities of vaccine in its manufacturing facility,  which was modified in 1995
for  increased  production.  The Company has  limited  experience  manufacturing
commercial  quantities  of vaccines and operating  its  manufacturing  facility.
Accordingly, there can be no assurance that the production process will not fail
or become subject to substantial disruptions.  See "Risk Factors - Manufacturing
and Scale-Up." To successfully introduce and commercialize its DTaP vaccine, the
Company will be required  to, among other  things,  participate  in  established
purchasing programs of Federal and state governments,  establish an identity and
reputation  for  the  Company  and  its  products,  create  an  awareness  among
pediatricians  of the  safety  and  efficacy  of the  vaccine,  distinguish  the
Company's  product  from that of its  competitors,  establish  the Company as an
effective  and  reliable   supplier  of  vaccines,   and   establish   effective
distribution  channels.  In October  1996,  the  Company  and  Abbott  signed an
agreement  for  Abbott  to  market  the  Company's   DTaP  vaccine  and  certain
combination  vaccines in the United States to the private  physician and managed



                                     - 30 -
<PAGE>



care markets upon approval by the FDA, with the Company marketing those products
to governmental purchasers. There can be no assurance that the Company or Abbott
will successfully  implement its sales and marketing strategy.  In attempting to
do so, the Company believes there will be intense competition from other vaccine
producers.   There  can  be  no  assurance  that  the  Company  will  produce  a
commercially viable product,  attain sufficient market share, or distinguish its
vaccine product from that of its competitors.

         Currently,   the  Company's   prospects  for  becoming  profitable  are
substantially  dependent  upon  the  successful  commercialization  of the  DTaP
vaccine, as well as the successful  development and  commercialization  of other
vaccines under  development.  There can be no assurance that the Company will be
able to  successfully  market  its  vaccine  products  at levels  sufficient  to
generate profits.

         DEPENDENCE  ON  SUPPLIERS.  While the Company  produces  the  pertussis
component  of the DTaP  vaccine,  it has  purchased,  and intends to continue to
purchase,  its  requirements  of the diphtheria and tetanus toxoids and enhanced
IPV  from  SSI.  There  can be no  assurance  that  SSI will be able to meet the
Company's requirements or that SSI will not experience difficulties in obtaining
necessary  regulatory  approvals or  disruptions in its production of diphtheria
and tetanus toxoids and IPV.

         Certain of the  Company's  production  processes  require raw materials
from sole sources or materials  that are  difficult for suppliers to produce and
certify  to the  Company's  specifications.  The  Company  also  may  experience
temporary  or  permanent  shortages  of critical  raw  materials  necessary  for
continued  production of its  vaccines.  Any shortage of these  materials  could
delay  production  efforts,  adversely impact  production  costs and yields,  or
necessitate  the  use  of  substitute  materials,  any  of  which  could  have a
significant adverse impact on the Company's operations. In addition, the Company
has contracted with third parties for the sterile fill, labelling, and packaging
of its vaccine  products until the Company obtains its own facilities to perform
these  operations.  Failure  of  any  such  contractor  to  meet  the  Company's
requirements  may  involve  costly  delays and  significant  expense,  and would
require  additional   regulatory  approval  as  the  Company  seeks  alternative
arrangements.

         CHANGES  IN  GOVERNMENT  PURCHASING  POLICIES.  Children  in the United
States  receive  immunizations  from  public  providers,  such as  local  health
departments, as well as from private providers. Immunizations provided by public
providers are generally paid for through  federal and state  government  funding
under public health programs.  These programs are intended to reduce barriers to
immunization  and to improve  immunization  rates by  providing  free vaccine to


                                     - 31 -
<PAGE>



qualifying  low-income and uninsured infants and children.  Government purchases
historically  have been at  prices  substantially  below  those  offered  to the
private sector and presently account for a substantial portion of the vaccine
doses  distributed  in the United  States.  From time to time,  legislative  and
regulatory initiatives are proposed that, if adopted, could significantly modify
government vaccine programs by, among other things, modifying or restricting the
federal  government's  purchasing  authority  or  substantially   increasing  or
reducing the funding available for government vaccine purchases.  The Company is
unable to predict  which  legislative  initiative,  if any,  will  ultimately be
enacted or the effect any such  initiative may ultimately  have on the Company's
business  or  results  of  future   operations.   In  addition,   proposals  for
health-care, insurance and tax reform may be considered in the future by federal
and  state  governments  and some of these  proposals,  if  adopted,  may  limit
government or third-party,  private reimbursement policies, or prices charged by
pharmaceutical and vaccine manufacturers for their product.

         NO ASSURANCE OF EFFECTIVE MARKETING.  The Company has little experience
in marketing its  products.  The Company is in the process of  implementing  its
marketing and sales plans for its products;  however,  there can be no assurance
that the  Company's  current  marketing  and  sales  strategies  or the size and
make-up of the Company's sales and marketing organization will be sufficient for
the  successful   commercialization  of  its  products.  The  factors  affecting
successful  commercial  launch of the  Company's  vaccines in the United  States
include,  among others:  establishing an identity and reputation for the Company
and its products;  creating an awareness among  pediatricians  of the safety and
efficacy of the Company's  vaccines;  distinguishing the Company's products from
those of its competitors;  establishing the Company as an effective and reliable
supplier of vaccines;  and establishing  effective  distribution  channels.  The
Company has entered into supply,  marketing  and  distribution  agreements  with
third parties under which such parties hold  exclusive  rights to market certain
of the Company's products within their respective  territories.  There can be no
assurance  that any of these third parties will be able to distribute and market
those products successfully within its territory. There also can be no assurance
that the Company will be  successful  in  negotiating  and  executing  marketing
and/or  distribution  agreements  with any  other  third  parties  covering  any
products  or that any other  third  party will be able to market  the  Company's
products successfully. See "Business Relationships."

         UNCERTAINTIES  RELATED TO CLINICAL TRIALS.  Before obtaining regulatory
approval for the commercial sale of any products under development,  the Company
must  demonstrate  through pre- clinical  studies and clinical trials that these
products  are safe and  effective.  The results from pre-  clinical  studies and
early clinical  trials may not be predictive of results  obtained in large-scale
clinical trials.  There can be no assurance that large-scale clinical trials for
any  of  the  Company's  products  will  demonstrate  safety  and  efficacy,  be
sufficient to support application for regulatory approval, or lead to marketable
products.  A number of companies in the  biotechnology  industry  have  suffered
significant  setbacks in advanced clinical trials even after achieving promising
results in earlier trials.


                                     - 32 -
<PAGE>



         NEED FOR REGULATORY  APPROVALS.  The Company has not commercialized any
products  or received  product  approval  from the FDA.  The  Company's  vaccine
products,  product  development  activities  and  manufacturing  facilities  and
processes are subject to extensive and rigorous regulation by the FDA, including
preclinical  and clinical  testing  requirements,  and  inspection  and approval
processes. Approval of the Company's products for commercial introduction in the
U.S.  currently  requires both a license for each product and a license for each
production  facility.  The process of obtaining  licenses can be costly and time
consuming,  and there can be no assurance that the licenses will be granted,  or
that FDA  review  will not  involve  delays  that  would  adversely  affect  the
Company's ability to market products. There also can be no assurance that any of
the products  under  development by the Company will  demonstrate  the safety or
efficacy  profiles  necessary  for  regulatory  approval,  or that the Company's
products under development or its production facility will receive the requisite
regulatory  approvals and licenses in a timely fashion or at all. There also can
be no assurance that the FDA or other  regulatory  authorities  will not require
the Company to conduct  additional  testing to assess the safety and/or efficacy
of the Company's  vaccines,  including  its DTaP vaccine.  Even if the necessary
licenses are obtained from the FDA,  there may be limitations on product use and
the FDA can withdraw  approvals at any time upon the  occurrence  of  unforeseen
problems.  The FDA can also limit or prevent the  manufacture or distribution of
the  Company's  products  and  require  a  recall  of  such  products.  The  FDA
regulations depend heavily on administrative  and scientific  interpretation and
advisory  committee  determinations,  and there can be no assurance  that future
interpretations by the FDA or other regulatory bodies, with possible prospective
and retroactive effect, will not adversely affect the Company. In addition,  the
FDA and various state agencies  inspect the Company and its facilities from time
to time to  determine  whether the Company is in  compliance  with  regulations,
including manufacturing,  testing, recordkeeping,  quality control and labelling
practices.  A  determination  that the Company is in material  violation of such
regulations could have a material adverse effect on the Company.

         MANUFACTURING  AND  SCALE-UP.  The  production  of vaccines is a highly
complex,  biological process involving many steps,  commencing from seed culture
through  final  production.  The  production  process  could  fail at any  point
resulting  in  the  failure  and   continued   inability   to  meet   production
requirements.  From  time to  time,  the  Company  experiences  disruptions  and
production  failures  and there are no  assurances  that the steps  taken by the
Company to address such  failures  will be effective or that such  failures will


                                     - 33 -
<PAGE>



not continue in the future or affect the Company's  ability to obtain regulatory
approval for its products or the timing of such approval or affect the Company's
ability to produce vaccines. No assurances can be given that the Company will be
successful in establishing and maintaining consistent manufacture and continuous
commercial production of its vaccines in sufficient quantity and quality or that
it will be capable of producing a  competitively  priced  product for commercial
sale.

         PATENT  PROTECTION AND PROPRIETARY  INFORMATION.  The vaccine  industry
traditionally  has placed  considerable  importance on obtaining and maintaining
patent and trade secret  protection for significant new  technologies,  products
and processes.  The Company  believes that such  protection will be an important
factor in its success and may require the expenditure of substantial  resources.
Many companies,  universities and research  institutions have applied for and/or
obtained patents for vaccine  products and technologies  that may be competitive
or inconsistent with those held by or licensed to the Company. No assurances can
be given as to the degree and range of  protection  any patents  will afford the
Company,  that  additional  patents will be issued to the Company,  or as to the
extent to which the Company will be successful  in avoiding any patents  granted
to others.  Further,  there can be no assurance that others have not or will not
independently  develop  or  otherwise  properly  gain  access to  technology  or
information  that is  substantially  similar  to that  which is  unpatented  yet
considered  proprietary  by the  Company.  The  Company  also may  desire  or be
required to obtain licenses from others in order to develop,  produce and market
commercially viable products effectively. Failure to obtain those licenses could
have a significant  adverse effect on the Company's ability to commercialize its
vaccine  products.  There  can  be no  assurance  that  such  licenses  will  be
obtainable  on  commercially  reasonable  terms,  if at all,  that  the  patents
underlying  such licenses will be valid and  enforceable or that the proprietary
nature  of the  unpatented  technology  underlying  such  licenses  will  remain
proprietary.  There has been, and the Company  believes that there may be in the
future,  significant  litigation  in the  industry  regarding  patent  and other
intellectual   property  rights.   If  the  Company  becomes  involved  in  such
litigation, it could consume substantial resources.

         COMPETITION  AND  TECHNOLOGICAL  CHANGE.  Competition  in  the  vaccine
industry is intense.  Competitors  of the Company both in the United  States and
internationally include major pharmaceutical and chemical companies, specialized
biotechnology firms, universities and other research institutions. Many of these
competitors are actively developing competing vaccines. For example, in 1996 and
1997,  three  competitors  announced  that their  respective  DTaP vaccines were
approved by the FDA for use in infants and  children.  One of those  competitors
also announced  that the FDA licensed a vaccine that combines by  reconstitution
that  company's  HIB vaccine with its DTaP vaccine for  administration  at 15-18


                                     - 34 -
<PAGE>



months of age and that it continues to seek FDA approval for  administration  at
two, four and six months of age. In addition, several competitors' DTaP vaccines
and certain  combination  vaccines  have been  licensed  for sale outside of the
United States.  Many of these competitors have substantially  greater resources,
more  extensive   experience  in  conducting   clinical  testing  and  obtaining
regulatory approvals for their products,  greater operating  experience,  larger
research  and  development  and  marketing   staffs,   and  greater   production
capabilities  than those of the Company.  In addition,  the vaccine  industry is
subject to significant  technological change. There can be no assurance that the
Company's  competitors  will not  succeed  in  designing  around  the  Company's
patents, developing technologies and products that are as or more effective than
any  that  have  been or are  being  developed  by the  Company,  or  developing
technologies  and  products  that would  render  the  Company's  technology  and
products obsolete and noncompetitive.

         PRODUCT  LIABILITY;  LIMITED  INSURANCE.  The testing and  marketing of
vaccine  products  entail an inherent  risk of product  liability.  Although the
Company has limited product  liability  insurance  coverage,  it intends to seek
additional insurance coverage as it commences commercialization of its products.
There can be no assurance that adequate  additional  insurance  coverage will be
available at acceptable cost, if at all, or that a product liability claim would
not  materially  adversely  affect the  business or  financial  condition of the
Company.  To the extent the  Company is not  covered by  insurance,  the Company
faces potential liability that could be substantial in the event of claims.

         LACK  OF  PROFITABILITY.  The  Company's  accumulated  deficit,  as  of
December 31, 1996 was approximately $58.8 million, and the Company presently has
limited revenues. The Company expects to incur additional losses until such time
as the Company  makes  significant  commercial  sales of its DTaP  product.  The
Company's  ability to achieve and maintain  profitability  is dependent upon its
ability to develop  products  that are  effective and  commercially  viable,  to
continue to obtain regulatory approvals for production and sale of its products,
and to produce and market its products  successfully.  There can be no assurance
that the Company will become profitable.

         AVAILABILITY  OF  CAPITAL.  It is  anticipated  that the  Company  will
continue to expend  significant  amounts of capital to fund its  operations  and
capital expenditures. The Company plans to finance its cash requirements through
a  combination  of: cash and cash  equivalents;  revenues from product sales and
from  license,   collaboration,   marketing,   distribution  and/or  development
agreements;  the  exercise  of stock  options;  the sale of debt  and/or  equity
securities;  mortgage financing; and equipment leases. There can be no assurance
that the Company  will be able to satisfy its funding  requirements  from any of
these  alternatives  or that it will be effective in reducing cash  requirements
for  operations  if FDA approval is not timely  received.  See Item 6 - Selected
Consolidated  Financial Data, and Item 7 - Management's  Discussion and Analysis
of Financial Condition and Results of Operation.

         DEPENDENCE  ON  ATTRACTING  AND  RETAINING  QUALIFIED  PERSONNEL.   The
Company's success in developing  marketable products and achieving a competitive
position will depend,  in part,  on its ability to attract and retain  qualified


                                     - 35 -
<PAGE>



personnel.  Competition  for such personnel is intense,  and no assurance can be
given that the  Company  will be able to  continue  to  attract  or retain  such
personnel. The loss of key personnel could adversely affect the Company.

         DIVIDENDS  AND TAXATION.  The Company has never paid cash  dividends on
its Common Stock. The Company currently  intends to retain earnings,  if any, to
finance  the growth and  development  of its  business  and does not  anticipate
paying cash dividends in the foreseeable future. Moreover, any profits earned by
the U.S.  subsidiary  of the Company will not be  distributable  directly to the
Company's shareholders. Instead, such subsidiary must declare and pay a dividend
to the  Company,  and the  Company  in  turn  must  declare  a  dividend  to its
shareholders. This will subject each dividend to a withholding tax. See Item 5 -
Market for Registrant's Common Equity and Related Stockholder  Matters, and Item
7 - Management's  Discussion and Analysis of Financial  Condition and Results of
Operation.

         IMPACT OF BECOMING A PASSIVE FOREIGN INVESTMENT COMPANY. If more than a
certain percentage of the Company's assets or income become passive, the Company
will be classified for U.S. tax purposes as a passive foreign investment company
("PFIC"), and a U.S. taxpayer may be subject to an additional Federal income tax
on receiving  certain dividends from the Company or selling the Company's Common
Stock.  See  Item  5  -  Market  for  Registrant's  Common  Equity  and  Related
Stockholder  Matters,  and Item 7 -  Management's  Discussion  and  Analysis  of
Financial Condition and Results of Operation.

         VOTING CONTROL BY PRINCIPAL SHAREHOLDERS. The principal shareholders of
the  Company,  BioChem  and  Dr.  Phillip  Frost,  either  directly  or  through
affiliates,  are parties to a  Shareholders'  Agreement  requiring,  among other
things,  that the  Company's  Common  Stock  covered by the  agreement  be voted
together for the election of directors.  As of January 31, 1997, these principal
shareholders beneficially owned approximately 18,991,601 shares of the Company's
outstanding Common Stock, which represented approximately 50.8% of the Company's
then outstanding  Common Stock. See Item 13 - Certain  Relationships and Related
Transactions.

         VOLATILITY  OF STOCK PRICE.  The market  prices for  securities of many
biotechnology and  pharmaceutical  companies,  including the Company,  have been
highly  volatile.  Many  factors  have  historically  had,  and are  expected to
continue to have,  a  significant  impact on the  Company's  business and on the
market price of the Company's securities including: announcements by the Company


                                     - 36 -
<PAGE>



and others regarding the results of regulatory approval filings, clinical trials
or other testing;  technological  innovations or new commercial  products by the
Company or its  competitors;  government  regulations;  developments  concerning
proprietary  rights;  public concern as to safety of vaccine and  pharmaceutical
products; and economic or other external factors.

         SHARES  ELIGIBLE FOR FUTURE SALE.  Sales of substantial  amounts of the
Company's Common Stock in the public market following the exercise of options or
the  conversion of  convertible  securities  could have an adverse effect on the
price  of the  Company's  securities.  To the  extent  that  either  of the  two
principal  shareholder  groups determines to sell a substantial  number of their
shares of the Company's Common Stock,  such sales could  significantly  increase
the volatility of the market price of the issued and  outstanding  securities of
the Company.  In  addition,  one of the  principal  shareholders  holds  certain
registration  rights  concerning  shares of the  Company's  Common Stock that it
owns. See Item 13 - Certain Relationships and Related Transactions.

ITEM 2.    PROPERTIES
           ----------

         The  production  of vaccines is a highly  complex,  biological  process
involving many steps, commencing from seed culture through final production. The
Company's vaccine production processes involve the use of patented  technologies
and  proprietary  rights and trade  secrets  at the  Company's  facilities.  The
Company's facilities are briefly described below:

<TABLE>
<CAPTION>

                                                Square
  Facility/Function           Location           Feet             Own/lease
- ---------------------------------------------------------------------------------------------
<S>                         <C>                  <C>         <C>
Production Facility         Beltsville, MD       26,000      Leased until February 1999
                                                             (ten-year renewal option)

Production Facility         Beltsville, MD       35,000      Leased until February 2001
                                                             (two five-year renewal options)

Warehouse and Support       Beltsville, MD       31,000       Owned
Services for Production 
Facility

Research and Development    Beltsville, MD       27,700       Subleased until April 1998
Laboratory Facility

Executive Offices and       Beltsville, MD       25,600       Leased until December 1997
Warehouse Facility                                            (two three-year renewal options)

</TABLE>


                                     - 37 -
<PAGE>



         The  Company's  production  facilities  have been designed and built to
produce  vaccines for large scale  clinical  trials and  commercial  sales after
product  licensing.  In 1995,  the  Company  modified  its  26,000  square  foot
production   facility  to   significantly   expand   production   capacity   for
Certiva[TRADEMARK].  See Item 1 - Business,  "Risk Factors -  Manufacturing  and
Scale-Up."

         In 1996, the Company acquired a 35,000 square foot production  facility
in  Beltsville,  Maryland.  The  acquisition  included the purchase and lease of
equipment and leasehold  improvements  and the  assumption of real estate leases
underlying the facility,  which are scheduled to expire in 2001,  subject to two
five-year  extensions.  The  facility is being  dedicated to the  production  of
vaccines for clinical trials and commercial sale.

         The Company is presently  leasing space for a research and  development
laboratory  facility.  This facility,  consisting of approximately 27,700 square
feet,  is used for  research  in areas  such as protein  chemistry,  immunology,
molecular biology and conjugation technology.

         The Company owns a building located adjacent to its current  production
facility.  This  building has been  modified to house the service and  warehouse
departments that support the Company's  production  facility.  In addition,  the
Company is continuously exploring  opportunities to build-out,  lease or acquire
additional  research,  development and production  facilities to accommodate the
Company's  expanding  vaccine  development  program.  The Company has no present
agreements,   commitments  or   understandings  in  respect  of  any  additional
facilities.

ITEM 3.    LEGAL PROCEEDINGS
           -----------------

         The  Company  is, and from time to time  becomes,  involved  in various
claims and lawsuits that are  incidental to its business.  In the opinion of the
Company's  management,  there are no material legal proceedings  pending against
the Company.


ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
           ---------------------------------------------------

           None.


                                     - 38 -
<PAGE>



                                     PART II


ITEM 5.    MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED
           STOCKHOLDER MATTERS
           --------------------------------------------------

         The  Company's  Common Stock is listed on the American  Stock  Exchange
("AMEX")  under the symbol  "NVX."  The table  below sets forth the high and low
closing  sales prices as reported on the AMEX  composite  tape for each calendar
quarter of 1995 and 1996.

                                                 HIGH                LOW
                                                 ----                ---

              1995
                First Quarter                  $ 9  1/4            $ 6
                Second Quarter                   9 15/16             5 7/8
                Third Quarter                   11 7/8               7 5/16
                Fourth Quarter                  15 1/2               9 3/8

               1996
                First Quarter                  $16 1/8             $12 1/2
                Second Quarter                  25 3/4              12 1/8
                Third Quarter                   28                  14 5/8
                Fourth Quarter                  28                  17 3/8


         The  number of  record  holders  of the  Company's  Common  Stock as of
February 28, 1997 was  approximately  271. The transfer  agent and registrar for
the Common Stock is American Stock Transfer and Trust Company,  which is located
at 40 Wall Street, New York, New York 10005.

         The  Company  has never paid cash  dividends  on its  Common  Stock and
anticipates  that its earnings,  if any, will be retained for development of the
Company's business.  Therefore, it is not anticipated that any cash dividends on
its Common Stock will be declared in the foreseeable  future. The payment of any
future  dividends will be at the discretion of the Company's  Board of Directors
and will depend upon, among other things, future earnings,  operations,  capital
requirements,  the general financial condition of the Company,  general business
conditions and tax considerations.

         Because the Company is a Canadian  corporation,  any profits  earned by
its U.S. subsidiary will not be distributable directly to shareholders. Instead,
for those profits to be distributed to shareholders, the subsidiary must declare
a dividend to the  Company,  and the Company in turn must  declare a dividend to
its  shareholders.  This will subject each dividend to a withholding tax. First,
the  dividend  from  the  subsidiary  to the  Company  will be  subject  to a 5%
withholding  tax  imposed  by the  United  States  on the  gross  amount  of the
dividend. Pursuant to the Canada-United States Income Tax Convention (1980) (the



                                     - 39 -
<PAGE>



"Treaty"), the subsequent dividend paid by the Company to a shareholder resident
in the United States will be subject to Canadian  withholding tax at the rate of
15% on the gross amount of the  dividend.  The rate of  withholding  tax will be
reduced to 5% in respect of  dividends  paid to a company  that is a resident of
the United States for purposes of the Treaty and owns at least 10% of the voting
stock of the Company. Each shareholder should consult his or her own tax advisor
as to tax  consequences  associated  with  dividends  received on the  Company's
Common Stock.

         If more than a certain  percentage of the Company's assets or income is
passive,  the Company  will be  classified  for United  States tax purposes as a
passive foreign  investment company or PFIC, and a United States taxpayer may be
subject to an additional  federal income tax on receiving certain dividends from
the Company or selling Common Stock.  Certain interest,  dividend,  capital gain
and royalty income may be considered passive income for PFIC purposes, which, in
the absence of  sufficient  other  income,  would  result in the  Company  being
classified as a PFIC.

         If the Company becomes a PFIC, a United States taxpayer will be subject
to special rules with respect to transactions  involving the Common Stock. Under
these rules,  all gains realized on disposition of the United States  taxpayer's
Common  Stock will be  allocated  pro rata over the number of years in which the
shareholder  held the Common  Stock.  The gain that is allocated to a prior year
(subsequent  to  December  31,  1986) in which the  Company  was a PFIC,  or any
subsequent year other than the year of disposition, will be taxed at the highest
marginal  rate for that year and such tax will be subject to an interest  charge
as if it had originally been due in that year. In addition, gain realized on the
disposition  of the United States  taxpayer's  Common Stock that is allocated to
the  current  year or to a prior  year  before  the  Company  was a PFIC will be
treated as ordinary income.  Similar rules will apply to  distributions  made by
the Company. The above rules will not apply if the United States taxpayer elects
to treat the Company as a  qualified  electing  fund and the  Company  agrees to
provide certain  information to the United States Internal Revenue  Service.  In
such case,  the United  States  taxpayer  will include in his or her income each
year his or her pro rata share of the ordinary  income and capital  gains of the
Company. The Company has not been classified as a PFIC to date, and during 1997,
the Company  intends to, and believes  that it can,  generate  sufficient  other
income to avoid being classified as a PFIC. See Item 7 - Management's Discussion
and Analysis of Financial Condition and Results of Operation.



                                     - 40 -
<PAGE>



         On May 7, 1996, the Company  completed an offering of 6.5%  convertible
subordinated  notes (the "Notes") in the principal  amount of $86.25 million due
May 1, 2003 for cash.  The net proceeds from this  offering  were  approximately
$82.7 million.  Goldman Sachs and UBS Securities were the initial  purchasers of
the Notes, and the aggregate fee to the initial purchasers was $3.0 million. The
Notes  were sold in the  United  States to  qualified  institutional  buyers (as
defined in Rule 144A, "Qualified Institutional Buyers") amended (the "Securities
Act"), and to a limited number of institutional accredited investors in a manner
exempt from  registration  in reliance on Regulation D of the Securities Act and
outside the United States in reliance on Regulation S under the Securities  Act.
The Notes are  convertible  into shares of the Company's  Common  Stock,  at the
initial  conversion  price  of  approximately  $24.86  per  share.  See Item 7 -
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operation.

         On October 11, 1996 the Company  sold to Abbott in a private  sale,  in
reliance on Section 4(2) of the Securities Act,  350,000 shares of the Company's
Common  Stock  for $6.3  million  in  cash.  See  Item 1 -  Business,  "Business
Relationships  -  Abbott  Laboratories  Agreement"  and  Item  7 -  Management's
Discussion and Analysis of Financial Condition and Results of Operation.

 
ITEM 6.    SELECTED FINANCIAL DATA
           -----------------------

         Selected  consolidated  financial  data for the  Company  are set forth
below. The selected financial data as of December 31, 1996 and 1995, and for the
years ended  December 31, 1996,  1995 and 1994 have been derived  from,  and are
qualified by reference to, the audited financial  statements  included elsewhere
in this Annual Report. The selected financial data as of and for the years ended
December  31,  1993 and 1992  have  been  derived  from  the  audited  financial
statements  of the Company not  included in this  Annual  Report.  The  selected
consolidated  financial  data should be read in  conjunction  with the financial
statements  of the  Company  and other  financial  information  included in this
Annual Report.


                                     - 41 -

<PAGE>




<TABLE>
<CAPTION>

                                   SELECTED CONSOLIDATED FINANCIAL DATA
                                  (In thousands, except per share data)

                                                                          North American Vaccine, Inc.
                                                                         Fiscal Year Ended December 31,
                                                        ---------------------------------------------------
                                                           1996       1995      1994       1993       1992
                                                           ----       ----      ----       ----       ----
<S>                                                    <C>         <C>        <C>       <C>         <C>
Statement of Operations Data:
Revenues
  Marketing, research and development agreements        $ 9,656   $  3,000   $     -     $     -     $      -
  Contract revenue                                           -          -          -         141        1,527
  Product sales                                             892         -          -           -           -
                                                        -------   --------   --------    --------    --------
     Total revenue                                       10,548      3,000         -          141       1,527
Operating Expenses:
  Production                                             14,764      6,317      6,188       3,032       3,669
  Research and development                               11,594     10,206      5,763       5,824       3,770
  General and administrative                              6,753      6,696      4,543       4,070       5,958
                                                        -------   --------   --------    --------    --------
     Total operating expenses                            33,111     23,219     16,494      12,926      13,397
                                                        -------   --------   --------    --------    --------

Operating loss                                           (22,563)  (20,219)   (16,494)    (12,785)    (11,870)

Gain on sale of investments in affiliates                  4,228    14,429     11,929          -            -
Interest and dividend income                               2,934       804        638         657       1,151
Interest expense                                          (4,088)       -          -           -           (5)
                                                        --------  --------   --------    ---------   --------- 
                                                                                                              
Net loss                                                $(19,489) $ (4,986)  $ (3,927)   $(12,128)   $(10,724)
                                                        ========  ========   ========    ========   =========  
                                                                                                              
Net loss per share                                      $  (0.63) $  (0.17)  $  (0.14)   $  (0.44)  $   (0.40)
                                                        ========  ========   ========    ========   =========

Weighted-average number
  of common shares outstanding                            30,764    29,745     28,785      27,622      26,970
                                                                                               
Balance Sheet Data:

Cash and cash equivalents                               $ 70,881  $ 10,443   $ 20,922    $ 17,166   $  28,207
Investments in affiliates (1)                              1,281     9,065     17,724      38,039       4,874
Total assets                                             122,962    41,249     49,580      63,762      42,575
Preferred stock                                            6,538     6,538      6,538       6,538       6,538
Common stock                                              71,357    58,474     56,922      51,958      51,312
Unrealized investment holding gains (1)                      653     7,466     14,762      33,165          -
Accumulated deficit                                      (58,769)  (39,280)   (34,294)    (30,367)    (18,239)
Dividends                                                     -         -          -           -           -

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

(1)   In December of 1993, the Company adopted Statement of Financial  Accounting Standard
      (SFAS)  115. In  accordance  with SFAS 115,  investments  in equity  securities  are
      reported on the  Company's  balance  sheet at their fair market  value  resulting in
      unrealized investment holding gains as a separate component of shareholders' equity.
      The original cost of these  investments at December 31, 1996,  1995,  1994, and 1993
      was $628, $1,599, $2,962, and $4,874 respectively. The market value of the Company's
      investment in affiliates at February 28, 1997 was approximately $1.5 million.


</TABLE>


                                     - 42 -
<PAGE>



ITEM 7.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
           CONDITION AND RESULTS OF OPERATION
           --------------------------------------------------
           

         THE FOLLOWING  PARAGRAPHS  CONTAIN CERTAIN FORWARD LOOKING  STATEMENTS,
WHICH ARE WITHIN THE MEANING OF AND MADE PURSUANT TO THE SAFE HARBOR  PROVISIONS
OF THE PRIVATE  SECURITIES  LITIGATION REFORM ACT OF 1995. THESE FORWARD LOOKING
STATEMENTS  INCLUDE,  WITHOUT  LIMITATION,  THOSE  REGARDING  THE  PROSPECTS FOR
REGULATORY APPROVAL AND THE NEED FOR FURTHER CLINICAL EVALUATION,  THE PROSPECTS
FOR MARKETING AND  DISTRIBUTION OF VACCINE  PRODUCTS,  ASSESSMENTS OF REGULATORY
AND ADVISORY COMMITTEE REVIEWS OF THE COMPANY'S AND COMPETITORS'  PRODUCTS,  THE
PROSPECTS  FOR  AND  FACTORS   AFFECTING  FUTURE  REVENUES  AND   PROFITABILITY,
LIKELIHOOD  OF  ADDITIONAL  FUNDING  UNDER  LICENSE,  COLLABORATION,  MARKETING,
DISTRIBUTION  AND/OR  DEVELOPMENT  AGREEMENTS,   CASH  REQUIREMENTS  FOR  FUTURE
OPERATIONS,  AND PROJECTED  CAPITAL  EXPENDITURES.  READERS ARE  CAUTIONED  THAT
FORWARD LOOKING  STATEMENTS INVOLVE RISKS,  UNCERTAINTIES,  AND FACTORS THAT MAY
AFFECT THE COMPANY'S BUSINESS AND PROSPECTS,  INCLUDING WITHOUT LIMITATION THOSE
DESCRIBED  BELOW AS WELL AS THE  RISKS  ASSOCIATED  WITH:  OBTAINING  REGULATORY
APPROVAL OF PRODUCTS  BY THE FDA;  THE  PRODUCTION  OF  VACCINES;  THE NATURE OF
COMPETITION; EFFECTIVE MARKETING; AND UNCERTAINTIES RELATING TO CLINICAL TRIALS,
ALL AS DISCUSSED IN THE COMPANY'S FILINGS WITH THE U.S.  SECURITIES AND EXCHANGE
COMMISSION.

Background
- ----------

         The  Company  is  engaged  in the  research,  development,  production,
marketing  and sale of vaccines for the  prevention  of  infectious  diseases in
children and adults.

         In February  1996, the Swedish  Ministry of Health  granted  regulatory
approval to market the Company's  acellular  pertussis  vaccine  formulated as a
combined DTaP vaccine for the prevention of diphtheria,  tetanus,  and pertussis
(whooping cough). This marketing authorization was the first regulatory approval
for any of the Company's products.  In September 1996, the Danish National Board
of Health granted regulatory  approval to market a combined DTaP-IPV vaccine for
all  primary  and booster  doses for  infants  and  children  in  Denmark.  This
combination  vaccine,   which  combines  the  DTaP  vaccine  with  an  enhanced,
inactivated  polio vaccine ("IPV")  developed  jointly by Statens  Seruminstitut
("SSI") and the Company. Under a supply agreement,  the Company manufactures the
acellular component of the vaccine, and SSI manufactures the diphtheria, tetanus
and IPV  components and markets and  distributes  the DTaP vaccine in Sweden and
the DTaP-IPV in Denmark.  In addition,  upon receipt of any required  regulatory
approvals,  SSI will market and  distribute  such products in the  Scandinavian,
Baltic  and  other  countries  comprising  its  territory  ("SSI's  Territory").
Accordingly,  the Company has been selling its acellular pertussis toxoid to SSI
for formulation into DTaP and DTaP-IPV for sale in SSI Territory.


                                     - 43 -
<PAGE>



         In 1995 and 1996, the Company recognized  development revenues pursuant
to  agreements  with  Pasteur  Merieux-Connaught,  under  which the  Company and
Pasteur  Merieux-Connaught  will jointly  develop the Company's  meningococcus B
vaccine.   Additional  funding  may  be  provided  to  the  Company  by  Pasteur
Merieux-Connaught  under  the  terms of the  license  and  clinical  development
agreements. See "Liquidity and Capital Resources," below.

         In the fourth  quarter of 1996,  the  Company  and Abbott  Laboratories
("Abbott")    signed   an   agreement    under   which   Abbott   would   market
Certiva[TRADEMARK],  the Company's  DTaP vaccine,  when approved by the FDA. The
marketing  agreement  also will allow Abbott to market the  Company's  DTaP-HIB,
DTaP-IPV and DTaP-IPV-HIB  combination  vaccines,  which are under  development.
Abbott will market  Certiva[TRADEMARK]  and the combination  vaccines to private
physicians  and managed care markets in the United  States for  immunization  of
infants  and  children.  The  Company  will  market  Certiva[TRADEMARK]  and the
combination vaccines to government  purchasers,  including state governments and
the CDC.

         On execution of the  agreement  with Abbott,  the Company  received $13
million of which $6.3  million  represented  payment for  350,000  shares of the
Company's  Common  Stock,  and the balance  represented  a  marketing  fee and a
clinical  development  payment.  The Company and Abbott will  collaborate in the
clinical  development  of the  combination  vaccines and Abbott will provide the
Company with clinical  development  funding.  The Company will receive  payments
upon  achievement  of prescribed  milestones.  The agreement  provides for total
payments  of up to $42  million by Abbott.  The first  milestone  relates to FDA
approval of Certiva[TRADEMARK]  provided certain other conditions are satisfied.
In  addition,  the Company  will  receive  revenues  from Abbott as it purchases
Certiva[TRADEMARK]  and the  combination  vaccine  products  for  resale  to the
private pediatric market.

         In September 1995, the Company filed a product license application with
the FDA for  approval  to market  Certiva[TRADEMARK]  and FDA  approval  for the
vaccine is pending.  During the fourth  quarter of 1996,  the  clinical  data on
Certiva[TRADEMARK]  was  presented  to and  reviewed  by the FDA's  Vaccine  and
Related Biological  Products Advisory Committee (the "FDA Advisory  Committee").
The FDA Advisory  Committee,  after the presentation of the data and discussion,
concluded that Certiva[TRADEMARK] is safe and effective for administration at 2,
4, 6 and 15-18 months of age. In addition,  the FDA Advisory Committee concluded
that  the data  supported  concurrent  administration  with  polio,  HAEMOPHILUS
INFLUENZAE type b, hepatitis B and measles-mumps-rubella vaccines, which are all
recommended  for  immunization  during  the  first  two  years of life.  The FDA



                                     - 44 -
<PAGE>



Advisory  Committee  raised  no  concerns  regarding  the  adequacy  of the data
regarding the use of  Certiva[TRADEMARK]  for the booster dose given to children
at 4-6  years of age  following  primary  immunization  using the  "whole  cell"
pertussis  vaccine.  Additional  data is required to support use at 4-6 years of
age following four  consecutive  doses of  Certiva[TRADEMARK].  The FDA Advisory
Committee commented on the adequacy of the data regarding the use of the vaccine
for the  booster  dose given to toddlers at 15-18  months of age  following  the
primary  immunization using the "whole cell" pertussis  vaccine.  In response to
those comments,  the Company intends to supplement the data presented at the FDA
Advisory  Committee meeting and additional data for this matter may be addressed
in  post-marketing  studies.  The Company does not believe  that any  additional
clinical  studies  will be  required  in  connection  with its  product  license
application, other than the standard post-licensure testing and surveillance for
continued monitoring of the vaccine. This is a forward looking statement and the
necessity   for   any   additional    clinical    studies   for   licensure   of
Certiva[TRADEMARK]  depends in large  measure upon the FDA's  requirements.  The
conclusions  of the FDA  Advisory  Committee  are not  binding  on the  FDA.  In
addition,  three  competitors  announced in 1996 and 1997 that their  respective
DTaP vaccines were approved by the FDA for use in infants and children.

         In May 1996,  the Company  completed  an  offering of 6.5%  convertible
subordinated  notes in the principal  amount of $86.25  million due May 1, 2003.
The net proceeds from this offering were approximately  $82.7 million.  Interest
on the notes is payable  semiannually  on May 1 and  November  1 each year.  The
notes are convertible  into shares of the Company's Common Stock, at the initial
conversion  price  of  approximately  $24.86  per  share.  The  notes  are  also
subordinated  to present and future senior  indebtedness of the Company and will
not  restrict  the  incurrence  of future  senior or other  indebtedness  by the
Company. See "Liquidity and Capital Resources," below.

         Prior to 1995, the Company's  limited  operating  revenues were derived
primarily from contracts  with NICHD to supply an  investigational  DTaP vaccine
for clinical  trials.  Performance  under these contracts was completed in 1993.
Provisional  payments  to the  Company  under  cost-reimbursable  contracts  are
subject to adjustment upon completion of audits of reimbursable  costs by NICHD.
In the opinion of management,  adjustments, if any, resulting from the audits of
the  contracts  are  not  expected  to have a  material  adverse  impact  on the
Company's  future financial  position or future results of operations,  although
there are no assurances in this regard.  This is a forward looking statement and
the factors affecting its outcome are in large measure outside of the control of
the Company.

         Research and development expenses were $11.6 million, $10.2 million and
$5.8 million in 1996, 1995 and 1994, respectively. The Company had 206, 167 and
118 full-time employees as of December 31, 1996, 1995 and 1994, respectively.

Years Ended December 31, 1996 And 1995
- --------------------------------------

         In 1996, the Company recognized  $892,000 of revenue from product sales
of its acellular  pertussis vaccine.  All such product sales were for export. In
addition,  the Company recognized $9.7 million of revenue from its collaboration
agreements principally with Pasteur Merieux-Connaught and Abbott.


                                     - 45 -
<PAGE>



         Production expenses were $14.8 million in 1996 compared to $6.3 million
in  1995.  The  increase  in  these  expenses  in  1996 is due to  increases  in
depreciation,  materials, and  labor,  as the  Company  produces  the  acellular
pertussis vaccine for European distribution and prepares for regulatory approval
of  Certiva[TRADEMARK]  in the  United  States.  The  increase  in labor cost is
attributable  primarily  to an increase  in number of  employees.  In  addition,
facility  costs  increased  in 1996 over 1995 due to the  Company's  placing  in
service its expanded production facility and its adjacent support facility.

         Research and  development  expenses  increased to $11.6 million in 1996
from $10.2  million  in 1995.  The  increase  in these  expenses  in 1996 is due
primarily  to  depreciation  expenses  related  to  the  acquisition  of  a  new
manufacturing  facility, and to a lesser extent, an increase in clinical testing
and related  expenses as the number of clinical trials  sponsored by the Company
increased  and as the Company  expanded  its  clinical  and  regulatory  affairs
operations.  See  "Liquidity and Capital  Resources"  below for a description of
acquisition of the new facility.

         General  and  administrative  expenses  were  $6.8  million  in 1996 as
compared to $6.7 million in 1995.  The  increase is  primarily  due to a greater
number of  employees  and related use of  supplies,  offset in part by decreased
outside consulting expenses.

         In 1996,  the Company sold 193,084  shares of its investment the common
stock of IVAX Corporation  ("IVAX"),  which generated  proceeds of approximately
$5.2 million and a realized gain of $4.2 million.  In 1995, the Company sold the
remaining  695,936  shares of its investment in BioChem common stock and 156,916
shares of its  investment in IVAX common stock,  which  generated  approximately
$11.5 and $4.3 million of cash  respectively.  The realized  gain on these sales
were $10.9 and $3.5 million respectively.

         Interest  and  dividend  income  increased to $2.9 million in 1996 from
$804,000 in 1995.  This  increase is due  primarily to higher cash balances as a
result of the placement of $86.25 million convertible  subordinated notes in May
1996. See "Liquidity and Capital Resources" below.

         Interest  expense in 1996 was $4.1  million due to the  issuance of the
convertible  subordinated  notes, and the capital lease  obligations for certain
equipment in the newly acquired manufacturing facility.

         The  factors  cited above  resulted  in a net loss of $19.5  million or
$0.63 per share of the Company's Common Stock in 1996 as compared to net loss of
$5.0 million or $0.17 per share of the Company's  Common Stock in 1995.  Without
the gains on the sales of investment securities in 1996 and 1995, the net losses
per share  for 1996 and 1995  would  have been  $0.77 and $0.65 per share of the
Company's Common Stock, respectively.  The weighted-average number of common and
common equivalent shares  outstanding was 30.8 million for 1996 compared to 29.7



                                     - 46 -
<PAGE>



million  for  1995.  The  increase  in the  number  of  weighted-average  shares
outstanding  for 1996 as  compared  to 1995 was  attributable  primarily  to the
exercises  of stock  options  and the sale of  350,000  shares of the  Company's
Common Stock to Abbott.

Years Ended December 31, 1995 And 1994
- --------------------------------------

         In 1995,  the Company  recognized  $3 million of revenue  from  Pasteur
Merieux-Connaught  in connection with the execution of the previously  announced
memorandum of  understanding  and from  development  payments under the clinical
development agreement for the Company's meningococcus B vaccine.

         Production  expenses were $6.3 million in 1995 compared to $6.2 million
in 1994. The 1994 results included a one-time  write-off of  approximately  $1.8
million  related  to  modifications  to  the  Company's  production   facilities
build-out  plan. The increase in production  expenses in 1995,  exclusive of the
write-off in 1994, is due to increases in labor, materials and supplies expenses
in 1995 as the Company  prepared for regulatory  approval of its DTaP vaccine in
the United States.  The increase in labor cost is primarily  attributable  to an
increase in number of employees.  In addition,  depreciation expense in 1995 was
greater  than in 1994 due to the  Company's  placing  in  service  its  modified
production facility.

         Research and  development  expenses  increased to $10.2 million in 1995
from $5.8  million in 1994.  The  increase was  primarily  clinical  testing and
related  expenses  and  to a  lesser  extent  increased  labor  and  patent  and
regulatory  filing  expenses.  These  increases  are the result of expanding the
clinical and regulatory affairs operations of the Company.

         General  and  administrative  expenses  were  $6.7  million  in 1995 as
compared to $4.5  million in 1994.  The  increase  was  primarily  due to higher
consulting and professional fees as the Company prepared for regulatory approval
to market  its DTaP  vaccine  in the  United  States  and,  to a lesser  extent,
increased labor, insurance and travel costs.

         In  1995,  the  Company  sold  the  remaining  695,936  shares  of  its
investment in BioChem  common stock and 156,916 shares of its investment in IVAX
common  stock,  which  generated  approximately  $11.5 and $4.3 million of cash,
respectively.  The  realized  gains on the sales  were  $10.9 and $3.5  million,
respectively.

         Interest  and  dividend  income  increased  to  $804,000  in 1995  from
$638,000 in 1994.  This  increase is due primarily to higher  interest  rates in
1995.


                                     - 47 -
<PAGE>



         The factors cited above  resulted in a net loss of $5.0 million in 1995
as compared to a net loss of $3.9 million in 1994. The net loss per share of the
Company's  Common  Stock was  $0.17  and $0.14 for 1995 and 1994,  respectively.
Without the $14.4  million gain on the sales of investment  securities,  the net
loss per share for 1995 would have been $0.65.  The loss per share in 1994 would
have been $0.49 without the write off of $1.8 million related to modification to
the Company's production facilities build-out plan and the gain of $11.9 million
on the sale of investment securities.  The weighted-average  number of shares of
the  Company's  Common Stock  outstanding  was 29.7 million for 1995 compared to
28.8 million for 1994. The increase in  weighted-average  shares  outstanding is
attributable primarily to exercises of stock options in 1995.

Liquidity And Capital Resources
- -------------------------------

         In May 1996,  the Company  completed  an  offering of 6.5%  convertible
subordinated  notes in the principal  amount of $86.25  million due May 1, 2003.
The net proceeds from this offering were approximately  $82.7 million.  Interest
on the notes is payable  semiannually  on May 1 and  November  1 each year.  The
notes are convertible  into shares of the Company's Common Stock, at the initial
conversion  price  of  approximately  $24.86  per  share.  The  notes  also  are
subordinated  to present and future senior  indebtedness of the Company and will
not  restrict  the  incurrence  of future  senior or other  indebtedness  by the
Company.  The notes are  redeemable,  in whole or in part,  at the option of the
Company on or after May 1, 1999 at certain  pre-established  redemption  prices,
plus  accrued  interest.  Upon a change in  control,  the Company is required to
offer to purchase all or part of the notes then  outstanding at a purchase price
equal to 100% of the principal  amount  thereof,  plus interest.  The repurchase
price is  payable  in cash or, at the  option of the  Company,  in shares of the
Company's  Common  Stock.  The  Company  has  filed  a  registration   statement
registering resales of the notes and the underlying shares of Common Stock.

         The Company spent $9.8 million for  operations in the fourth quarter of
1996 and $30.3  million  for the year  ended  1996.  The  Company  financed  its
operations  and  capital  expenditures  for 1996 from cash,  sale of  investment
securities,  proceeds  from the  offering of its  convertible  notes,  a capital
lease,  and amounts from  marketing,  research and development  agreements,  and
product sales.  At December 31, 1996, the Company had cash and cash  equivalents
of approximately $70.9 million and investment  securities in an affiliate with a
market value of $1.3 million.  The  investment  securities  consisted of 125,000
shares  of IVAX  common  stock.  The  fair  market  value  of  these  investment
securities  as of February  28, 1997 was $1.5  million.  These  investments  are
volatile and therefore subject to significant fluctuations in value.


                                     - 48 -
<PAGE>



         The Company  anticipates  that cash  requirements for operations in the
first quarter in 1997 will be between approximately $7 million and $8 million as
the  Company:   expands   production  for  commercial  sale  in  Europe  and  in
anticipation  of  regulatory  approval  in the  United  States;  plans  for  and
commences  additional clinical trials for its combination vaccines and conjugate
vaccines;  and operates its newly acquired  development and production facility.
Thereafter,  quarterly cash  requirements  for  operations  will depend upon the
level of vaccine production, costs in preparing for and the timing of the market
introduction of Certiva[TRADEMARK],  the level of expenditures for the Company's
ongoing research and development  program,  and the timing of interest  payments
due on the convertible  subordinated  notes described  above. The foregoing is a
forward  looking  statement.  There are no assurances that the Company will meet
the  projections  for  cash  requirements  for  operations,   that  any  further
regulatory  approvals  will  be  received  as  projected,  that  the  milestones
described above will be achieved, or that, if such milestones are obtained, they
will  contribute  materially  to the  quarterly  cash  requirements.  Failure or
significant  delays in receiving  additional  regulatory  approvals  and meeting
required  milestones  would have a significant  adverse  effect on the Company's
future financial position.

         Total  capital  expenditures  for 1996 were  $28.7  million,  primarily
attributable to the acquisition of a 35,000 square foot  manufacturing  facility
in Beltsville,  Maryland.  That  acquisition  included the purchase and lease of
equipment and leasehold improvements and the assumption of real estate leases.

         The total acquisition cost for the equipment and leasehold improvements
was approximately $24.9 million, which included a cash payment of $17.2 million.
The balance of $7.7  million is  represented  by an equipment  lease  obligation
which  expires in 2000.  The lease will be accounted  for as a capital lease for
financial reporting purposes,  with monthly payments of approximately  $179,000.
In  addition,  the Company has assumed  the real estate  leases  underlying  the
facility,  which are scheduled to expire in February  2001,  but may be extended
through 2011.  Under the terms of the equipment  lease, the Company has a buyout
option at the end of the third year for a predetermined amount, and an option at
the end of the  fourth  year at the  greater  of the  fair  market  value of the
equipment or a predetermined  amount.  Under the equipment lease agreement there
are financial  covenants that obligate the Company to maintain  certain  minimum
cash and  investment  balances,  a minimum  tangible net worth and certain other
financial ratios. The Company would be required to post an irrevocable letter of
credit  for  predetermined  amounts  at  such  time  as  the  Company  is not in
compliance with any of these financial covenants.


                                     - 49 -
<PAGE>



         Total projected capital  expenditures for the first quarter of 1997 are
expected to be approximately  $1.5 million.  Thereafter,  capital  expenditures,
exclusive  of any future real  estate  acquisition  or  build-out  plans,  could
fluctuate  based upon a number of factors  including:  the Company's  ability to
meet  demand  for its  licensed  products  from  its  existing  facilities;  the
Company's ability to produce sufficient quantities of investigational product in
its existing  facilities;  and unanticipated costs to replace or repair existing
equipment  and  systems  in  order  to keep the  manufacturing  and  development
facilities  operational  or in  compliance  with  regulatory  requirements.  The
Company continues to evaluate its need to build-out, lease or acquire additional
research,  development,  production  and other  facilities  to  accommodate  the
Company's  expanding  vaccine  development  program.  The Company has no present
agreements,   commitments  or   understandings  in  respect  of  any  additional
facilities  and the total  capital  expenditures  for such a  project  will vary
substantially depending upon a number of factors including,  among other things,
the size of such a facility,  the  equipment  and systems  requirements  for the
facility, location, zoning and other government restrictions.

         Cash requirements for operations and capital expenditures for 1997 will
be financed through a combination of: cash and cash  equivalents;  revenues from
product  sales and fees and payments  from  license,  collaboration,  marketing,
distribution and/or development  agreements;  the exercise of stock options; the
sale of debt and/or equity securities; mortgage financing; and equipment leases.
The  Company  believes  that it has  adequate  cash  resources  to meet its 1997
funding  requirements  although  there are no assurances  in this regard.  While
failure or significant delays in receiving  additional  regulatory approvals and
meeting  required  milestones  would have a  significant  adverse  effect on the
Company's future operating  results and future financial  position,  the Company
believes  that in such event it could  manage and reduce cash  requirements  for
operations,  although  there are no  assurances in this regard.  This  paragraph
contains forward looking statements and the factors affecting the ability of the
Company to meets its funding requirements and manage its cash resources include,
among other things, the magnitude and timing of product sales; the magnitude and
timing of any fees and payments  from  license,  marketing,  and/or  development
agreements; and the magnitude of fixed costs.


                                     - 50 -
<PAGE>



Outlook
- -------

         The  Company  recognized  an  operating  loss of $199,000 in the fourth
quarter of 1996 based on revenues of $9.8 million  principally from up-front and
milestone  payments  from  marketing  and  development  agreements.  The Company
anticipates   that  the  1997   quarterly   operating   results  may   fluctuate
significantly based upon a number of factors including,  among other things: the
magnitude  of  product  sales for  distribution  in  Europe;  the  timing of FDA
approval  for,  and the  commercial  introduction  of,  Certiva[TRADEMARK];  the
ability of the  Company  and its  distributors  to  effectively  market and sell
products in their  respective  territories;  the sales  prices  established  for
products by the Company and its distributors;  compensation  expense  associated
with stock-based compensation plans; the efficiency of production; the timing of
the payments under license,  collaboration,  marketing,  distribution and/or
development  agreements  with  third  parties;  the  ability  of the  Company to
manufacture and deliver products in accordance with customer orders;  the timing
and costs  associated  with clinical  trials and  post-licensure  testing of the
Company's products;  the timing and amount of funding that may be received under
any  additional   license,   collaboration,   marketing,   distribution   and/or
development  agreements  with  third  parties;  and the  timing of and amount of
proceeds from the sale of additional  investment  securities.  This is a forward
looking  statement and the factors affecting its outcome are described herein as
well as in the first paragraph of this  Management's  Discussion and Analysis of
Financial Condition and Results of Operations.

         There  are no  assurances  that the  Company  will  meet the  operating
results projected,  that any further regulatory approvals will be received, that
any milestones will be achieved,  or if achieved,  that milestone  payments will
contribute materially to the quarterly operating results of the Company.

         PRODUCT SALES.  During 1996, the government of Sweden granted marketing
authorization  for the Company's  acellular  pertussis  vaccine  formulated as a
combined  DTaP  vaccine  and  the  government  of  Denmark   granted   marketing
authorization  for the Company's  acellular  pertussis  vaccine  formulated as a
combined  DTaP-IPV  vaccine.  SSI is responsible for marketing and  distributing
these  products in SSI's  Territory.  In addition,  during the fourth quarter of
1996,  the  Company  executed a supply and  distribution  agreement  with Chiron
Behring  ("Behring")  covering  the  Company's  DTaP and  DTaP-IPV  vaccines for
Germany and Austria ("Behring's Territory").


                                     - 51 -
<PAGE>



         The  Company  therefore  anticipates  revenues  during  1997  from  the
continued sale of its acellular  pertussis  component to SSI for its sale of the
DTaP and the  DTaP-IPV  vaccines  in SSI's  Territory.  Any  additional  product
approvals  granted to SSI could lead to increased  revenues from the sale of the
Company's  acellular  pertussis vaccine.  Additional revenues may be forthcoming
from sale of the DTaP and/or DTaP-IPV  vaccines to Behring in anticipation of or
following  regulatory  approval for one or both of these products in the Behring
Territory.  There are no  assurances  that  further  product  approvals  will be
obtained in these  territories  during 1997 or at all, or that once obtained SSI
or Behring will be effective in the marketing and  distribution of the products.
The Company does not control the  marketing and  distribution  efforts of SSI or
Behring in their respective  territories and, therefore,  the Company's revenues
for product sales in those  territories are dependent upon the  effectiveness of
these parties' sales, marketing and distribution efforts.

         As  described  above,  during  1996,  the Company and Abbott  signed an
agreement  under  which  Abbott  would  market  Certiva[TRADEMARK]  and  certain
combination  vaccines  to private  physicians  and managed  care  markets in the
United States for immunization of infants and children.  The Company will market
these products to government  purchasers,  including  state  governments and the
Centers for Disease Control and Prevention ("CDC").  The Company filed a product
license  application for  Certiva[TRADEMARK]  with the FDA in September 1995 and
FDA approval is pending.

         The Company therefore anticipates revenues during 1997 from the sale of
Certiva[TRADEMARK] in the United States to state governments and the CDC, and to
Abbott for resale to private  physicians  and the managed  care  market.  If the
product is launched successfully in the United States by the Company and Abbott,
revenues from operations and the prospects for profitability would significantly
increase.  There can be no assurance that the FDA's approval will be obtained or
that,  once  obtained,  the Company and/or Abbott will be effective in marketing
and distributing the product.  The principal  factors  affecting the approval of
Certiva[TRADEMARK]  and its timing are  believed  to be the  sufficiency  of the
clinical trials' design,  the quality of the clinical data submitted to the FDA,
and the adequacy of the manufacturing facilities and operations for the product,
among  other  things.  The factors  affecting  successful  commercial  launch of
Certiva[TRADEMARK]  in the United States  include,  among  others:  successfully
participating   in  established   purchasing   programs  of  Federal  and  state
governments;  establishing  an identity and  reputation  for the Company and its
products;  creating an awareness among  pediatricians of the safety and efficacy
of  the  vaccine;   distinguishing  the  Company's  product  from  that  of  its
competitors;  establishing the Company as an effective and reliable  supplier of



                                     - 52 -
<PAGE>



vaccines;  and establishing  effective  distribution channels. In 1996 and 1997,
three competitors announced that their respective DTaP vaccines were approved by
the FDA for use in infants and children. One of those competitors also announced
that the FDA licensed a vaccine that combines by  reconstitution  that company's
HIB vaccine with its DTaP vaccine for  administration at 15-18 months of age and
that it continues to seek FDA approval for  administration  at two, four and six
months of age. In  addition,  several  competitors'  DTaP  vaccines  and certain
combination  vaccines have been licensed for sale outside of the United  States.
Accordingly,  there can be no  assurance  that the Company and its  distributors
will attain sufficient  market share for the Company's  products at satisfactory
sales price levels.

         Approval of  Certiva[TRADEMARK]  for commercial  introduction  requires
that the FDA issue a license for the  product  and a license for the  production
facilities. Production of vaccines is a highly complex, biological process which
involves many steps commencing from seed culture through final  production.  The
production  process  could  fail  at any  point  resulting  in the  failure  and
inability  to meet  production  requirements.  From  time to time,  the  Company
experiences  disruptions  and production  failures,  and there are no assurances
that the steps taken by the Company to address such  failures  will be effective
or that such  failures  will not continue in the future or affect the  Company's
ability to obtain  regulatory  approval  for its  products or the timing of such
approval or affect the Company's  ability to produce vaccines.  Moreover,  there
are no assurances  that the Company will be able to  successfully  establish and
maintain  consistent  manufacture  and continuous  commercial  production of its
vaccines  in  sufficient  quantity  and  quality  or that it will be  capable of
producing a  competitively  priced  product for  commercial  sale. The foregoing
paragraphs  contain  only a partial  description  of the factors  affecting  the
Company's  business  prospects  and risk factors  affecting  future  operations.
Reference  is made to the  Company's  filings with the  Securities  and Exchange
Commission  for a more  complete  description  of the  risks  and  uncertainties
affecting the Company and its business.

         RESEARCH & DEVELOPMENT, LICENSING AND MARKETING AGREEMENTS. In December
1995, the Company signed a clinical development  agreement and license agreement
with Pasteur Merieux-Connaught under which the parties agreed to jointly develop
its new conjugate vaccine against  meningococcus B infection for both adults and
pediatric  indications.  In 1996 and 1995, the Company  recognized  revenue from
Pasteur  Merieux-Connaught  under this  collaboration.  Future  fees and funding
would  be  made  upon  achievement  of  development,   clinical  and  regulatory
milestones. Total remaining fees and payments to the Company upon achievement of
all  clinical  and  regulatory  milestones  amount  to $45  million.  The  first
milestone is the satisfactory  completion of a pre-clinical  study. In addition,
the  license  agreement  must be ratified by the  National  Research  Council of
Canada ("NRC").  Successful  completion of the milestone and ratification of the




                                     - 53 -
<PAGE>



license by the NRC would trigger a payment from Pasteur  Merieux-Connaught.  The
time it may take to achieve future milestones cannot be predicted accurately and
there are no assurances  that any milestone will be met during 1997 or at all or
that  the  NRC  will  ratify  the  license  agreement.   In  addition,   Pasteur
Merieux-Connaught  may terminate these  agreements in its sole discretion at any
time.

         Under the marketing and distribution agreement with Abbott, the Company
will receive during 1997 clinical development payments aggregating $7 million on
dates certain and milestone payments upon achievement of prescribed clinical and
regulatory   events.   The  first   milestone   relates  to  FDA   approval   of
Certiva[TRADEMARK]  provided  certain  other  conditions  are  satisfied.  Total
remaining  payments by Abbott to the Company under the agreements,  inclusive of
payments expected during 1997, amount to $29 million.  In addition,  the Company
will receive  revenues  from Abbott as it purchases  Certiva[TRADEMARK]  and the
combination  vaccine products for resale to the private pediatric market.  There
are no  assurances  that the  milestones  will be met,  that the  quantities  of
Abbott's purchases of Certiva[TRADEMARK] will be significant or as to the timing
of such purchases,  or that Abbott will not exercise its right to terminate this
arrangement at any time with advance notice.

         During  1997,  the Company  anticipates  that  license  fees,  clinical
development  funding and milestone  payments under its existing  agreements will
range from $7 million to  approximately  $19 million.  This is a forward looking
statement  and the  factors  that  affect  the  timing  of the  license  fee and
milestone  payments are in large measure  outside of the control of the Company.
The  revenue  recognized  by the  Company  from  clinical  development  payments
received from Abbott will be equal to the Company's expenditures in the clinical
development program for  Certiva[TRADEMARK] and the combination vaccines up to a
specified  amount.  Accordingly,  such  revenues  are likely to  fluctuate  from
quarter  to  quarter  and would  have no effect on net  operating  results.  The
factors that affect the timing of these expenditures, and therefore the revenues
to be recognized  therefrom,  are subject to  uncertainties  related to clinical
trials and the regulatory  approval  process.  There are no assurances  that the
clinical  development  funding from Abbott will be sufficient to fund all of the
Company's    expenditures    in   the   clinical    development    program   for
Certiva[TRADEMARK] and the combination vaccines.

         The  Company is  considering  the  advisability  of  executing  further
distribution  agreements for certain markets  throughout the world.  The Company
also intends to collaborate in the development of selected  vaccine products and
may enter into additional collaborative development agreements similar in nature
to that which was signed with Pasteur Merieux-Connaught,  as described above. In


                                     - 54 -
<PAGE>



addition,  the Company is in various  stages of  discussions  with third parties
regarding  various business  arrangements  including  licensing,  joint venture,
acquisition,  and  other  business  agreements,  some of which  possibly  may be
concluded  in the near  term.  There are no  assurances  that the  Company  will
successfully  negotiate and sign any such  agreements or that, if executed,  the
financial terms for any such agreement will be significant.

Tax And Other Matters
- ---------------------

         At December 31, 1996, the Company and its  subsidiaries  had income tax
loss  carryforwards  of  approximately  $9.9 million to offset  future  Canadian
source  income and  approximately  $55.5  million to offset future United States
taxable  income  subject  to the  alternative  minimum  tax rules in the  United
States.

         If more than a certain  percentage  of the  Company's  assets or income
become  passive,  the Company  will be  classified  for U.S.  tax  purposes as a
passive foreign investment company ("PFIC"),  and a U.S. taxpayer may be subject
to an additional  Federal  income tax on receiving  certain  dividends  from the
Company or selling the Company's Common Stock.

         The Company has not been classified as a PFIC to date, and during 1997,
the Company  intends to, and believes  that it can,  generate  sufficient  other
income to avoid being classified as a PFIC.


ITEM 8.    FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
           -------------------------------------------

         The  Financial   Statements  and   accompanying   Notes  thereto,   the
Accountants'  Report,  required  Supplementary Data, and certain other financial
information  are set forth on pages 56 to 82 of this Annual  Report  immediately
following.  The table of contents to the Financial  Statements and  accompanying
Notes appears on page 84 of this Annual Report.


                                     - 55 -
<PAGE>


                    Report of Independent Public Accountants


To North American Vaccine, Inc. and Subsidiaries:

We have audited the accompanying  consolidated  balance sheets of North American
Vaccine,  Inc. (a Canadian corporation) and Subsidiaries as of December 31, 1996
and 1995, and the related consolidated  statements of operations,  shareholders'
equity and cash flows for each of the three years in the period  ended  December
31, 1996.  These financial  statements are the  responsibility  of the Company's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements based on our audits.

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

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the financial  position of North American Vaccine,  Inc.
and  Subsidiaries  as of December  31,  1996 and 1995,  and the results of their
operations  and their cash flows for each of the three years in the period ended
December 31, 1996, in conformity with generally accepted accounting principles.



                                             /s/ Arthur Andersen LLP


Washington, D.C.
February 14, 1997



                                     - 56 -
<PAGE>





NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(In thousands, except share and per share data)
                                                              
                                                             December 31,
                                                         1996           1995
                                                      ---------      ----------
ASSETS
Current assets:
  Cash and cash equivalents                            $  70,881     $  10,443
  Accounts receivable                                      4,166         2,000
  Inventory                                                1,782           496
  Prepaid expenses and other current assets                  533           571
                                                       ---------     ---------
          Total current assets                            77,362        13,510

Property, plant and equipment, net                        40,629        18,121
Investment in affiliate, at market                         1,281         9,065
Deferred financing costs, net                              3,184             -
Other assets                                                 506           553
                                                       ---------     ---------
     Total assets                                      $ 122,962     $  41,249
                                                       =========     =========

LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                     $   1,912     $   3,550
  Deferred revenue                                         3,000             -
  Obligation under capital lease, 
      current portion                                      1,496             -
  Other current liabilities                                4,540         4,296
                                                       ---------     ---------
         Total current liabilities                        10,948         7,846

6.50% Convertible subordinated notes                      86,250             -
Obligation under capital lease, net of     
     current portion                                       5,871             -
Deferred rent credit, net of current portion                 114           205
                                                       ---------     ---------
     Total liabilities                                   103,183         8,051

Commitments and contingencies

Shareholders' equity:                                
 Preferred  stock,  no  par  value;   unlimited  
     shares  authorized-Series  A, convertible; 
     issued and outstanding 2,000,000 shares;
     entitled to Can $2.50 per share in liquidation        6,538         6,538
 Common stock, no par value; unlimited shares 
     authorized; issued
     31,406,999 shares at December 31, 1996 and 
     30,186,711 shares at December 31, 1995               71,357        58,474
 Unrealized investment holding gain                          653         7,466
 Accumulated deficit                                     (58,769)      (39,280)
                                                       ---------      --------
         Total shareholders' equity                       19,779        33,198
                                                       ---------      --------

     Total liabilities and shareholders' equity        $ 122,962      $ 41,249
                                                       =========      ========

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



                                     - 57 -
<PAGE>




<TABLE>
<CAPTION>


NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)


                                                            Years ended December 31,
                                                          1996         1995        1994
                                                        ---------   ---------   ----------
<S>                                                    <C>          <C>         <C>
Revenues
   Marketing, research and development agreements       $  9,656    $  3,000    $     -
   Product sales                                             892           -          -
                                                        --------    --------    --------
Total revenues                                            10,548       3,000          -
                                                        --------    --------    --------

Operating expenses:
   Production                                             14,764       6,317       6,188
   Research and development                               11,594      10,206       5,763
   General and administrative                              6,753       6,696       4,543
                                                        --------    --------    --------
         Total operating expenses                         33,111      23,219      16,494
                                                        --------    --------    --------

Operating loss                                           (22,563)    (20,219)    (16,494)

Other income (expenses):
   Gain on sale of investments in affiliates               4,228      14,429      11,929
   Interest and dividend income                            2,934         804         638
   Interest expense                                       (4,088)          -           -
                                                        --------    --------    --------
Net loss                                                $(19,489)   $ (4,986)   $ (3,927)
                                                        ========    ========    ========

Net loss per share                                      $  (0.63)   $  (0.17)   $  (0.14)

Weighted-average number of common shares
  outstanding                                             30,764      29,745      28,785









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


</TABLE>

                                     - 58 -
<PAGE>


<TABLE>
<CAPTION>

NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY
(In thousands)



                                                                                     
                                          Series A                         
                                        Convertible                       Unrealized     
                                      Preferred Stock      Common Stock    Investment                    Total
                                     ------------------  ----------------   Holding    Accumulated    Shareholders'
                                     Shares     Amount   Shares    Amount    Gains       Deficit        Equity
                                    -------    -------   ------   -------  ----------  ------------  -------------

<S>                                <C>        <C>       <C>      <C>       <C>         <C>            <C>     
Balance, December 31, 1993           2,000      $6,538   27,732   $51,958   $33,165      $(30,367)      $61,294

Exercises of stock options               -           -    1,512     4,861         -             -         4,861
Shares issued under
  401(k) plan                            -           -        9       103         -             -           103
Realized investment holding gains        -           -        -         -   (11,929)            -       (11,929)
Decrease in market value
  of investments                         -           -        -         -    (6,474)            -        (6,474)
Net loss                                 -           -        -         -         -        (3,927)       (3,927)
                                   -------      ------   ------   -------    ------     ---------       -------
Balance, December 31, 1994           2,000       6,538   29,253    56,922    14,762       (34,294)       43,928

Exercises of stock options               -           -      920     1,424         -             -         1,424
Shares issued under
  401(k) plan                            -           -       14       128         -             -           128
Realized investment holding gains        -           -        -         -   (14,429)            -       (14,429)
Increase in market value
  of investment                          -           -        -         -     7,133             -         7,133
Net loss                                 -           -        -         -         -        (4,986)       (4,986)
                                   -------      ------   ------   -------    ------     ---------       -------
Balance, December 31, 1995           2,000       6,538   30,187    58,474     7,466       (39,280)       33,198

Exercises of stock options               -           -      859     6,356         -             -         6,356
Issuance of common stock                 -           -      350     6,344         -             -         6,344
Shares issued under
  401(k) plan                            -           -       11       183         -             -           183
Realized investment holding gains        -           -        -         -    (4,228)            -        (4,228)
Decrease in market value
  of investment                          -           -        -         -    (2,585)            -        (2,585)
Net loss                                 -           -        -         -         -       (19,489)      (19,489)
                                   -------      ------   ------   -------   -------      --------       -------
Balance, December 31, 1996           2,000      $6,538   31,407   $71,357   $   653      $(58,769)      $19,779
                                   =======      ======   ======   =======   =======      ========       =======







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

</TABLE>

                                     - 59 -
<PAGE>


<TABLE>
<CAPTION>

NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)

                                                             Years ended December 31,
                                                          1996         1995        1994
                                                        ---------   ---------   ----------
<S>                                                    <C>          <C>         <C>       
Cash flows from operating activities:
    Net loss                                            $(19,489)    $ (4,986)    $ (3,927)
    Adjustments to reconcile net loss to net cash 
    used in operating activities:
       Gain on sale of investments in affiliates          (4,228)     (14,429)     (11,929)
       Gain on disposal of equipment                         (12)           -            -
       Write-off of property and equipment                     -           27        1,806
       Depreciation and amortization                       6,154        2,223        2,206
       Amortization of deferred financing costs              335            -            -
       Contribution of common stock to 401(k) plan           183          128          103
       Decrease (increase) in other assets                    47         (248)        (205)
       Decrease in deferred rent                             (81)         (75)         (65)
       Cash flows (used in) provided by other              
       working capital items                              (1,818)         (56)       3,442
                                                         --------    --------     --------  

          Net cash used in operating activities          (18,909)     (17,416)      (8,569)
                                                         --------    --------     --------  

Cash flows from investing activities:
    Capital expenditures                                 (21,012)     (10,279)      (6,377)
    Proceeds from sale of investments in affiliates        5,199       15,792       13,841
    Proceeds from sale of equipment                           27            -            -
                                                        --------     --------     --------  
          Net cash (used in) provided by 
          investing activities                           (15,786)       5,513        7,464
                                                        --------     --------     --------  

Cash flows from financing activities:                  
    Proceeds from issuance of convertible notes           86,250            -            -
    Deferred financing costs of convertible notes         (3,519)           -            -
    Repayment of lease obligation                           (298)           -            -
    Proceeds from exercises of stock options               6,356        1,424        4,861
    Proceeds from issuance of common stock                 6,344            -            -
                                                        --------     --------     --------  
          Net cash provided by financing activities       95,133        1,424        4,861
                                                        --------     --------     --------

Net increase (decrease) in cash and cash equivalents      60,438      (10,479)       3,756
Cash and cash equivalents, beginning of period            10,443       20,922       17,166
                                                        --------     --------     --------  
Cash and cash equivalents, end of period                $ 70,881     $ 10,443     $ 20,922
                                                        ========     ========     ========












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

</TABLE>

                                     - 60 -
<PAGE>




<TABLE>
<CAPTION>

NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)
(In thousands)

                                                              Years ended December 31,
                                                           1996         1995        1994
                                                        ---------    ---------   ---------
<S>                                                    <C>           <C>         <C>
Cash Flows Provided By Other Working Capital Items:

    Decrease (increase) in :
       Accounts receivable                              $ (2,166)      $(2,000)    $   340
       Accounts receivable from affiliate                      -            81          53
       Inventory                                          (1,286)         (347)        (93)       
       Prepaid expenses and other current assets              38          (264)       (108)

    Increase (decrease) in :
       Accounts payable                                   (1,638)          404       2,990
       Deferred revenue and other current 
          liabilities                                      3,234         2,070         260
                                                        --------       -------     -------
    Net cash provided by (used in) other working 
       capital items                                    $ (1,818)      $   (56)    $ 3,442
                                                        ========       =======     =======

Supplemental Disclosure of Cash Flow Information

Cash paid for interest                                  $  2,758       $     -     $     -
                                                        ========       =======     =======
Equipment acquired through capital lease                $  7,665       $     -     $     -
                                                        ========       =======     =======


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

</TABLE>


                                     - 61 -
<PAGE>





                  NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1)  ORGANIZATION

         North  American  Vaccine,  Inc. and  Subsidiaries  (the  "Company")  is
engaged  in the  research,  development  and  production  of  vaccines  for  the
prevention of infectious diseases in children and adults.

         The  Company  was   incorporated  in  Canada  on  August  31,  1989  to
consolidate  the  assets,   liabilities  and  operations  of  American   Vaccine
Corporation  ("American  Vaccine"),   and  certain  assets  and  vaccine-related
technologies of BioChem Pharma Inc. ("BioChem"),  in a share purchase and merger
transaction  (the "Merger").  On February 28, 1990, the shareholders of American
Vaccine  approved the Merger.  Prior to February  28,  1990,  the Company had no
operations.

         Pursuant to the Merger,  shareholders  of  American  Vaccine  exchanged
their shares for 50 percent  ownership of the Company.  Simultaneously,  BioChem
purchased  a 50 percent  interest  in the  Company  for cash,  shares of BioChem
common stock, and certain rights in BioChem's vaccine-related technologies.  The
net assets of  American  Vaccine,  common  stock of  BioChem,  and the rights in
vaccine-related  technologies transferred by BioChem were carried forward to the
Company at their  previously  recorded  amounts as reflected  in the  historical
financial statements of BioChem and American Vaccine.

(2)  RISK FACTORS

         The Company has incurred  substantial  losses in the development of its
technologies.  The Company has generated  only limited  revenue from the sale of
its  acellular  pertussis  vaccine  and  marketing,   research  and  development
agreements. Prior to commercial introduction, the Company's DTaP vaccine for the
prevention  of  diphtheria,  tetanus,  and  pertussis  (whooping  cough) must be
approved  by the U.S.  Food and Drug  Administration  ("FDA")  for  sales in the
United States and by similar authorities for sales in other countries.  The DTaP



                                     - 62 -
<PAGE>


vaccine was  approved  for sale in Sweden in  February  1996,  and the  DTaP-IPV
(polio)  vaccine was approved for sale in Denmark in the third  quarter of 1996.
The DTaP  vaccine is  currently  being  considered  for approval for sale in the
United  States by the FDA.  There can be no  assurance as to when or whether the
Company  will  receive  such  approval,  or that any such  approval  will not be
subject to additional testing requirements.  The commercial  introduction of the
Company's DTaP vaccine will require the Company to manufacture and produce large
quantities  of vaccine in its  manufacturing  facility,  which was  modified for
increased  production in 1995. The Company has limited experience  manufacturing
commercial  quantities  of vaccines and operating  its  manufacturing  facility.
Accordingly, there can be no assurance that the production process will not fail
or become  subject to substantial  disruptions.  To  successfully  introduce and
commercialize  its DTaP  vaccine,  the Company  will be  required  to  implement
successfully  its sales and  marketing  strategy  that will enable it to,  among
other things,  participate  in  established  purchasing  programs of Federal and
State governments,  establish an identity and reputation for the Company and its
products,  create an awareness among pediatricians of the safety and efficacy of
the vaccine, distinguish the Company's product from that of its competitors, and
establish  effective  distribution  channels.  In October 1996,  the Company and
Abbott  Laboratories  ("Abbott")  signed an  agreement  for Abbott to market the
Company's DTaP vaccine and certain combination  vaccines in the United States to
the private  physician  and managed care markets upon  approval by the FDA, with
the Company marketing those products to governmental purchasers. There can be no
assurance that the Company or Abbott will  successfully  implement its sales and
marketing  strategy.  In attempting to do so, the Company believes there will be
intense competition from other vaccine producers. There can be no assurance that
the Company will produce a commercially viable product, attain sufficient market
share, or distinguish its vaccine product from that of its competitors.

         Currently,   the  Company's   prospects  for  becoming  profitable  are
substantially  dependent  upon  the  successful  commercialization  of the  DTaP
vaccine, as well as the successful  development and  commercialization  of other
vaccines under  development.  There can be no assurance that the Company will be
able to  successfully  market  its  vaccine  products  at levels  sufficient  to
generate profits.

         The  production  of vaccines is a highly  complex,  biological  process
involving many steps, commencing from seed culture through final production. The
production  process  could  fail  at any  point  resulting  in the  failure  and
continued inability to meet production  requirements.  No assurance can be given
that  the  Company  will be  successful  in  establishing  and  maintaining  the
commercial  production of its vaccines or that it will be capable of producing a
competitively priced product.


                                     - 63 -
<PAGE>



         The Company produces the pertussis component of the DTaP vaccine and it
has  purchased,  and intends to continue to purchase,  its  requirements  of the
diphtheria and tetanus  toxoids and enhanced  inactivated  polio vaccine ("IPV")
from Statens  Seruminstitut  ("SSI"),  an enterprise  owned by the government of
Denmark.  There can be no assurances that SSI will be able to meet the Company's
requirements or that SSI will not experience  difficulties or disruptions in its
production of diphtheria and tetanus  toxoids and IPV.  Certain of the Company's
production  processes  require raw materials from sole sources or materials that
are   difficult   for  suppliers  to  produce  and  certify  for  the  Company's
specifications. The Company also may experience temporary or permanent shortages
of critical raw materials  necessary  for continued  production of its vaccines.
Any shortage of these materials could delay production efforts, adversely impact
production costs and yields, or necessitate the use of substitute materials, any
of which could have a significant adverse impact on the Company's operations. In
addition,  the Company has  contracted  with third parties for the sterile fill,
labeling,  and packaging of its vaccine  products until the Company  obtains its
own facilities to perform these  operations.  Failure of any such  contractor to
meet the  Company's  requirements  may  involve  costly  delays and  significant
expense,  and would require additional  regulatory approval as the Company seeks
alternative arrangements.

         The vaccine  industry is subject to significant  technological  changes
and many of the Company's  competitors have substantially  greater financial and
technical  resources,  and production,  marketing,  research and development and
regulatory  capabilities,  than the Company. In addition,  the Company is in the
process of establishing a marketing and sales organization for its products.

         Under existing  government vaccine programs,  the manufacturers  submit
contract  bids  under  which  they would  sell  vaccines  to  Federal  and State
governments  for  vaccination of qualified  individuals  under Federal and State
sponsored vaccination programs. In addition,  State governments are permitted to
purchase   vaccines   directly  from  the  manufacturers  at  the  same  prices.
Historically,  government  purchases  under  existing  government  programs have
represented a significant  portion of the pediatric vaccine doses distributed in
the United States and have been at prices  substantially  below those offered to
the private sector.  From time to time,  legislative and regulatory  initiatives
are proposed that, if adopted,  could  significantly  modify government  vaccine
programs by, among other things, restricting the federal government's purchasing
authority or substantially reducing the funding available for government vaccine
purchases.  The Company is unable to predict which  legislative  initiative,  if
any, will ultimately be enacted or the effect any such initiative may ultimately
have on the Company's business or results of future operations.


                                     - 64 -
<PAGE>



         The Company believes that patent protection will be an important factor
in its success and may require the  expenditure  of  substantial  resources.  No
assurance can be given as to the degree and range of protection any patents will
afford the Company,  that  patents  will be issued to the Company,  or as to the
extent  to  which  the  Company  will be  successful  in  avoiding  or  securing
commercially  reasonable  licenses  under patents  granted to others.  There has
been,  and the Company  believes  that there may be in the  future,  significant
litigation  in the industry  regarding  patent and other  intellectual  property
rights.  If the Company becomes  involved in such  litigation,  it could consume
substantial resources.

         Although the Company has limited product liability  insurance coverage,
it may seek additional  insurance coverage as it commences  commercialization of
its DTaP vaccine.  There can be no assurance that adequate additional  insurance
coverage  will be available at  acceptable  costs,  if at all, or that a product
liability claim would not materially  adversely affect the business or financial
condition of the Company.

(3)  SIGNIFICANT ACCOUNTING POLICIES

         (a) BASIS OF ACCOUNTING  AND CURRENCY.  The  accompanying  consolidated
financial  statements have been prepared in conformity  with generally  accepted
accounting  principles ("GAAP") in the United States and are denominated in U.S.
dollars,  because the Company  conducts the majority of its transactions in this
currency.  The  application  of  Canadian  GAAP  would not  result  in  material
adjustments to the accompanying  financial statements,  except for the impact of
the adoption of Statement of Financial Accounting Standards ("SFAS") No. 115, as
discussed  in Note 6.  The  effect  of  foreign  currency  translation  has been
immaterial.

         (b) PRINCIPLES OF CONSOLIDATION.  The consolidated financial statements
include the accounts of North American Vaccine,  Inc. and its subsidiaries.  All
significant intercompany transactions have been eliminated in consolidation.

         (c) PERVASIVENESS OF ESTIMATES. The preparation of financial statements
in conformity  with GAAP requires  management to make estimates and  assumptions
that affect the reported  amounts of assets and  liabilities  and  disclosure of
contingent  assets and  liabilities at the date of the financial  statements and
the  reported  amounts of revenues  and expenses  during the  reporting  period.
Actual results could differ from estimates.


                                     - 65 -
<PAGE>



         (d) CASH AND CASH EQUIVALENTS.  The Company considers all highly liquid
investments  with  an  original  maturity  of  three  months  or less to be cash
equivalents. Cash and cash equivalents consist primarily of commercial paper and
U.S. Treasury Bills.

         (e) INVENTORIES. Inventories are stated at the lower of cost (first-in,
first-out) or market. Components of inventory cost include materials, labor, and
manufacturing overhead. Inventories consist of the following (in thousands):

                                         1996             1995
                                         ----             ----

               Raw Materials           $1,518           $  496
               Work-in-process            162                -
               Finished goods             102                -
                                      -------           ------
                                       $1,782           $  496
                                       ======           ======

         (f) REVENUE  RECOGNITION.  Nonrefundable  fees or milestone payments in
connection  with  research  and  development  or  collaborative  agreements  are
recognized  when they are earned in accordance  with the applicable  performance
requirements  and contract terms.  Revenue from product sales is recognized when
all  significant  risks of ownership  have been  transferred,  the amount of the
selling  price  is fixed  and  determinable,  all  significant  related  acts of
performance have been completed,  and no other significant  uncertainties exist.
In most cases, these criteria are met when the goods are shipped.

         (g) RESEARCH AND DEVELOPMENT  COSTS.  The Company expenses all research
and  development  costs as incurred.  Under Canadian GAAP,  certain  development
costs should be deferred to future periods if certain criteria are met. No costs
have been  capitalized for Canadian GAAP purposes  because the Company  believes
that the applicable deferral criteria have not been met.

         (h) DEPRECIATION AND AMORTIZATION.  Depreciation of property, plant and
equipment,  with the exception of leasehold  improvements and an owned facility,
is provided using an accelerated  method over the estimated  useful lives of the
assets.  The  estimated  useful  lives  are  generally  five to seven  years for
machinery,   equipment  and  laboratory  fixtures.  Leasehold  improvements  are
amortized  over  the  term  of  the  lease.  The  Company's  owned  facility  is
depreciated on a straight line basis over twenty years.


                                     - 66 -
<PAGE>



         (i) DEFERRED  FINANCING COSTS.  Deferred financing costs represent fees
and other costs incurred in connection with the issuance of the 6.5% convertible
notes.  These costs are  amortized  over the term of the related  debt using the
effective interest rate method. Total accumulated  amortization through December
31, 1996 is $335,000.

         (j)  INCOME  TAXES.  The  Company  computes   deferred  tax  assets  or
liabilities based on the difference  between the financial  statement and income
tax bases of assets and liabilities using the enacted tax rate.

         (k) NET LOSS PER COMMON SHARE.  Net loss per common share is based upon
the weighted-average number of common shares outstanding during each period. The
effect of outstanding convertible preferred stock, convertible notes and options
on net loss per share is not included because it would be antidilutive.

         (l)  RECLASSIFICATIONS.  Certain items in the prior year's consolidated
financial  statements have been  reclassified  to conform with the  presentation
used in the 1996 financial statements.

(4)  PRODUCTION, DEVELOPMENT, AND MARKETING CONTRACTS

         (a)  AGREEMENTS  WITH PASTEUR  MERIEUX-CONNAUGHT.  In the December 1995
clinical   development   agreement   and   license   agreements   with   Pasteur
Merieux-Connaught,  the  parties  agreed to jointly  develop the  Company's  new
conjugate  vaccine  against   meningococcus  B  for  both  adult  and  pediatric
indications.  The Company  recognized  $3 million and $4 million of research and
development    revenue   for    non-refundable    payments   made   by   Pasteur
Merieux-Connaught  in 1995  and  1996,  respectively,  in  connection  with  the
clinical  development  agreement.  Further  fees and  funding  will be made upon
achievement of development, clinical and regulatory milestones. In addition, the
Company   will   receive   royalties   on   any   product   sales   by   Pasteur
Merieux-Connaught.

         Under the  clinical  development  agreement,  the parties  will jointly
develop the vaccine through Phase II clinical  trials,  and each party will have
access  to  and  the  right  to  use  the  clinical   trial   results.   Pasteur
Merieux-Connaught will be responsible for all costs associated with the clinical
development of the  meningococcus  B vaccine  through the completion of Phase II
clinical trials.

         In order to become  operational the license  agreement must be ratified
by the  National  Research  Council of Canada and the results of a  pre-clinical
study  must  be  deemed  satisfactory.   After  the  license  agreement  becomes
operational,  Pasteur Merieux-Connaught will hold co-exclusive world-wide rights


                                     - 67 -
<PAGE>




to  manufacture  and sell the  meningococcus  B  vaccine  both as a  stand-alone
product  and in  combination  with  other  vaccines.  The  Company  will  retain
co-exclusive  world-wide  rights to  manufacture  and sell the  meningococcus  B
vaccine both as a stand-alone  product and in combination  with other  vaccines.
Pasteur Merieux-Connaught may elect to terminate the agreements at any time.

         (b) AGREEMENT WITH ABBOTT LABORATORIES.  In the fourth quarter of 1996,
the Company and Abbott  signed an  agreement  under which  Abbott  would  market
Certiva(TRADEMARK),  the Company's  DTaP vaccine,  when approved by the FDA. The
marketing  agreement  also will allow Abbott to market the  Company's  DTaP-HIB,
DTaP- IPV and DTaP-IPV-HIB combination vaccines which are under development.

         Abbott  will  market  Certiva(TRADEMARK)  and  combination  vaccines to
private   physicians   and  managed  care  markets  in  the  United  States  for
immunization of infants and children. The Company will market Certiva(TRADEMARK)
and  the  combination  vaccines  to  government   purchasers,   including  state
governments and the Centers for Disease Control and Prevention.

         On  execution  of the  agreement,  the Company  received $13 million of
which  approximately $6.3 million  represented payment for 350,000 shares of the
Company's common stock, and the balance represented a marketing fee and clinical
development funding. Amounts received for clinical development to be expended in
the future by the  Company  have been  deferred.  The  Company  and Abbott  will
collaborate in the clinical  development of the combination  vaccines and Abbott
will provide the Company with clinical  development  funding.  In addition,  the
Company will receive  payments upon  achievement of prescribed  milestones.  The
agreement provides for total payments of up to $42 million by Abbott,  including
the $13 million  received upon  execution.  The first  milestone  relates to FDA
approval of Certiva(TRADEMARK)  provided certain other conditions are satisfied.
In  addition,  the Company  will  receive  revenues  from Abbott as it purchases
Certiva(TRADEMARK)  and the  combination  vaccine  products  for  resale  to the
private pediatric market.

         (c) AGREEMENT  WITH CHIRON  BEHRING GMBH & CO. In the fourth quarter of
1996,  the Company and Chiron  Behring GmbH & Co.  ("Chiron  Behring")  signed a
definitive  agreement under which Chiron Behring would market the Company's DTaP
vaccine.  The marketing  agreement  will also allow Chiron Behring to market the
Company's  combination  DTaP-IPV vaccine.  Under terms of the agreement,  Chiron


                                     - 68 -
<PAGE>



Behring  will  market the DTaP and  DTaP-IPV  vaccines  in Germany  and  Austria
following  appropriate  regulatory  approval.  The  agreement  provides  for  an
up-front  nonrefundable payment and future milestone payments. In addition,  the
Company will receive revenues as it sells the vaccine products to Chiron Behring
for resale in its territory.

         (d) PRODUCT  SALES.  In February  1996,  the Swedish  Medical  Products
Agency  granted  regulatory  approval  to market a combined  DTaP  vaccine  that
contains the Company's  acellular  pertussis vaccine for all primary and booster
doses. In September 1996, the Danish National Board of Health granted regulatory
approval to market a combined  DTaP-IPV  (polio)  vaccine,  which  includes  the
Company's  acellular  pertussis  vaccine,  for all primary and booster doses for
infants and children in Denmark. SSI markets the DTaP vaccine in Sweden, and the
DTaP-IPV  vaccine in Denmark,  and has  indicated  that it will file  additional
applications for the acellular pertussis vaccine,  both alone and in combination
with other antigens,  in other countries  within its territory.  There can be no
assurance  given that SSI will file such  additional  applications  or that,  if
filed,  such  applications  will  be  approved  by  the  appropriate  regulatory
authorities.

         Following the regulatory  approvals  described  above,  the Company has
recognized  revenues from sale of its acellular  pertussis  vaccine.  Additional
revenues from such product sales are dependent upon successful commercialization
of the DTaP vaccine in Sweden and the DTaP-IPV vaccine in Denmark and additional
product  approvals  of  acellular  pertussis  products in other  countries.  The
Company does not control the marketing and  distribution  efforts of third party
distributors  in their  respective  territories  and,  therefore,  the Company's
revenues for product sales in those  territories  are dependent  upon  effective
sales,  marketing  and  distribution  efforts  of  such  parties.  There  are no
assurances if or when further  product  approvals will be obtained,  or that the
vaccines will be marketed and distributed effectively.


                                     - 69 -
<PAGE>



(5)  PROPERTY, PLANT AND EQUIPMENT

         Property,  plant and  equipment  were recorded at cost and consisted of
the following components:


                                                             As Of December 31,
                                                             ------------------
                                                             1996          1995
                                                             ----          ----
                                                              (in thousands)

    Property, plant and equipment:
      Land                                                $   498       $   498
      Building and improvements                             2,407         2,014
      Machinery, equipment and laboratory fixtures         41,405        17,764
      Leasehold improvements                                8,567         6,122
      Office furniture, equipment and software              3,488         1,373
                                                          -------       -------
                                                           56,365        27,771

    Accumulated depreciation and amortization:
      Building and improvements                               129            22
      Machinery, equipment and laboratory fixtures         10,728         5,847
      Leasehold improvements                                3,537         2,818
      Office furniture, equipment and software              1,342           963
                                                          -------       -------
                                                           15,736         9,650
                                                          -------       -------
    Property, plant and equipment, net                    $40,629       $18,121
                                                          =======       =======


         In 1994, the Company began  modifications  to its  production  facility
that  were  completed  in  1995.  In the  third  quarter  of 1994,  the  Company
recognized a non-cash  expense of  approximately  $1.8 million  associated  with
these  modifications to its production  facilities  build-out plan. This expense
represents  a  write-off  of  property  and  equipment,  previously  capitalized
leasehold  improvements  and design  costs.  The original  cost and  accumulated
depreciation of the property and equipment  written-off was  approximately  $4.9
and $3.1 million, respectively.

         In 1996,  the Company  entered  into an  agreement  which  included the
assumption  of a lease of a 35,000  square foot  manufacturing  facility and the
purchase  and lease of  equipment  and  leasehold  improvements.  See Note 8 for
further description of the transaction.


                                     - 70 -
<PAGE>



(6)  INVESTMENTS IN AFFILIATES

         In accordance with SFAS No. 115, "Accounting for Certain Investments in
Debt and Equity Securities," equity securities  classified as available-for-sale
are  reported  at fair value,  with  unrealized  gains and losses  reported as a
separate  component  of  shareholders'   equity.  As  a  result,  the  Company's
investments  in its affiliates are reflected at their current market value as of
December 31, 1996, and 1995, of $1.3, and $9.1 million,  respectively  (original
cost of $629,000 and $1.6 million, respectively).

         In 1994,  the Company  sold 1.1  million  shares of its  investment  in
BioChem  stock (see Note 16). The gross  proceeds and the realized gain from the
sales were $10.2 and $9.3 million,  respectively.  The Company also sold 200,000
shares of its investment in IVAX stock. The gross proceeds and the realized gain
from the sales were $3.6 and $2.7 million, respectively.

         In  1995,  the  Company  sold  the  remaining  695,936  shares  of  its
investment in BioChem  stock.  The gross proceeds and the realized gain from the
sales were $11.5 and $10.9 million,  respectively. The Company also sold 156,916
shares of its investment in IVAX stock. The gross proceeds and the realized gain
from the sales were $4.3 and $3.5 million, respectively.

         In 1996,  the Company sold  193,084  shares of its  investment  in IVAX
stock.  The gross  proceeds and the  realized  gain from the sales were $5.2 and
$4.2 million,  respectively. The historical cost of the remaining 125,000 shares
of IVAX common stock was $629,000 or $5.03 per share at December 31, 1996.

         The market values of these securities as of December 31, 1996 and 1995,
as  disclosed  on  the  accompanying  consolidated  balance  sheets,  have  been
determined  based on the closing prices for registered  securities of IVAX as of
those dates. The aggregate market value of the Company's remaining investment in
IVAX common stock at February 28, 1997, was  approximately  $1.5 million.  These
investment  securities are volatile and,  therefore,  are subject to significant
fluctuations in value.

(7)  OTHER CURRENT LIABILITIES

         Other current liabilities consisted of the following components:

                                                         As Of December 31,
                                                        --------------------
                                                        1996            1995
                                                        ----            ----
                                                           (In thousands)

       Payroll and fringe benefits                    $1,114          $   736
       Accrued interest                                  999               --
       Accrued consulting and professional fees          144              767
       Reserve for contract loss                         720              720
       Accrued taxes                                     608              633
       Accrued costs of clinical trials                  421              574
       Other accrued liabilities                         247              471
       Accrued construction costs                        192              310
       Deferred rent credit                               95               85
                                                      ------           ------
              Total other current liabilities         $4,540           $4,296
                                                      ======           ======


                                     - 71 -
<PAGE>



(8) COMMITMENTS AND CONTINGENCIES

         (a)  OPERATING  LEASES.  The  Company  has a  lease  agreement  for its
production  facility  through  February 28, 1999.  The Company has the option of
extending  this lease for an additional ten years at the then fair market value.
Under the terms of the lease of this facility, the lessor reimbursed the Company
for $625,000 of improvements made to the property.  This  reimbursement has been
reflected as a deferred rent credit,  which is being  amortized over the term of
the lease.  The lease provides for minimum annual  escalations of the base rent.
These escalations are recorded as expense ratably over the term of the lease.

         The Company has also leased  office  space  through  December 31, 1997,
with two three-year renewal options.

         In December 1993, the Company signed a sublease agreement to rent space
for a research and development facility through April 30, 1998. In October 1996,
the Company signed a sublease agreement to rent additional space adjacent to the
existing research and development facility through April 30, 1998.

         In November  1996,  the Company  assumed a lease to rent 35,000  square
feet of space for a development  and  production  facility  through  February 1,
2001, with two five-year renewal options.  The lease provides for minimum annual
escalations of the base rent.

         Minimum  future  lease  payments  under all leases,  exclusive  of real
estate tax escalations, are as follows:


                  Years Ending
                  December 31,
                  --------------
                  (In Thousands)

                  1997                              $1,514
                  1998                               1,051
                  1999                                 652
                  2000                                 568
                  2001                                  71
                                                    ------
                  Total                             $3,856
                                                    ======


Total rent expense was $898,000; $812,000; and $742,000 in 1996, 1995, and 1994,
respectively.


                                     - 72 -
<PAGE>



         (b) CAPITAL LEASE.  In connection  with the operating  lease  agreement
described  above that was entered into in 1996, the Company also entered into an
agreement  that  included  the purchase  and lease of  equipment  and  leasehold
improvements.  The total acquisition cost was approximately $24.9 million, which
included a cash  payment of $17.2  million.  The  balance  of $7.7  million  was
financed  through an  equipment  lease  obligation  which  expires in 2000.  The
equipment  lease  has  been  accounted  for as a  capital  lease  for  financial
reporting  purposes,  with monthly  payments of  approximately  $179,000.  Total
depreciation  expense  associated  with  equipment  under the capital  lease was
approximately  $715,000 for 1996.  Under the terms of the equipment  lease,  the
Company  has a buyout  option at the end of the third  year for a  predetermined
amount,  and an option at the end of the fourth  year at the greater of the fair
market value of the  equipment or a  predetermined  amount.  Under the equipment
lease  agreement  there are  financial  covenants  that  obligate the Company to
maintain  certain minimum cash and investment  balances,  a minimum tangible net
worth and certain other financial ratios.  The Company would be required to post
an irrevocable  letter of credit for  predetermined  amounts at such time as the
Company is not in  compliance  with any of these  financial  covenants.  Minimum
future lease payments are as follows:


               Years Ending
               December 31,
               ------------
               (In Thousands)

               1997 (includes interest of $646)           $2,142
               1998 (includes interest of $495)            2,142
               1999 (includes interest of $329)            2,142
               2000 (includes interest of $141)            2,552
                                                          ------
                    Total                                  8,978
               Less interest component                    (1,611)
                                                          ------
               Total principal payments                   $7,367
                                                          ======

         (c)  CONTINGENCIES.  In prior  years,  the Company was awarded  various
cost-plus-fixed-fee  contracts  by the  National  Institute  of Child Health and
Human Development  ("NICHD").  Performance under these contract was completed in
1993. Provisional payments to the Company under cost-reimbursable  contracts are
subject to adjustment  upon  completion of audits of  reimbursable  costs by the
NICHD.  In the opinion of management,  adjustments,  if any,  resulting from the
audits of the  contracts are not expected to have a material  adverse  impact on
the Company's financial position or future results of operations.

         The  Company  is, and from time to time  becomes,  involved  in various
claims and lawsuits that are  incidental to its business.  In the opinion of the
Company's  management,  there are no material legal proceedings  pending against
the Company.


                                     - 73 -
<PAGE>



(9) CONVERTIBLE SUBORDINATED NOTES

         In May 1996,  the Company  completed  an offering of 6.50%  convertible
subordinated  notes in the principal  amount of $86.25  million due May 1, 2003.
The net proceeds from this offering were approximately  $82.7 million.  Interest
on the notes is payable  semi-annually on May 1 and November 1 of each year. The
notes are convertible  into common shares of the Company at the conversion price
of approximately  $24.86 per common share. The notes are subordinated to present
and  future  senior  indebtedness  of the  Company  and  will not  restrict  the
incurrence of future senior or other indebtedness by the Company.  The notes are
redeemable, in whole or in part, at the option of the Company on or after May 1,
1999, at certain pre-established redemption prices plus accrued interest. Upon a
change in control,  the Company is required to offer to purchase  all or part of
the notes then  outstanding  at a purchase  price equal to 100% of the principal
amount thereof,  plus interest.  The repurchase  price is payable in cash or, at
the option of the Company, in common shares.

(10)  FAIR VALUE OF FINANCIAL INSTRUMENTS

         The carrying  amounts  reported in the Company's  consolidated  balance
sheets at December 31, 1996 and 1995,  for cash and cash  equivalents,  accounts
receivable, accounts payable and accrued liabilities approximate fair values due
to the short  maturity of those  instruments.  Management  believes the carrying
value of the  convertible  subordinated  notes and the capital lease  obligation
approximates fair value.

(11)  INCOME TAXES

         The operations of the Company are taxed under Canadian  income tax laws
and the  operations  of its United  States  branch are also taxed  under  United
States income tax laws subject to applicable treaty provisions for the avoidance
of double taxation.  The Company's wholly owned  subsidiaries,  American Vaccine
and AMVAX, Inc., are both taxed under United States income tax laws.

         For  income  tax  reporting  purposes  in 1995 and  1994,  the  Company
realized a net gain in Canada and a net loss in the United States.  In 1996, the
Company  incurred  a loss for income tax  reporting  purposes  in Canada and the
United States.  The Company had sufficient net operating loss  carryforwards  to


                                     - 74 -
<PAGE>



offset the 1995 and 1994 taxable income in Canada.  Accordingly, no provision or
benefit for United  States or  Canadian  income  taxes has been  recorded in the
accompanying  financial statements.  The components of the Company's net results
from operations for tax reporting purposes are:

                        1996           1995            1994
                        ----           ----            ----
                                    (in thousands)


     United States    $(14,736)      $(11,973)     $ (6,749)
     Canada             (4,753)         6,987         2,822
                      ---------      ---------     ---------
         Total        $(19,489)      $ (4,986)     $ (3,927)
                      =========      =========     =========


The components of the net deferred tax assets consisted of:

                                                      As Of December 31,
                                                 ---------------------------
                                                 1996                  1995
                                               --------              --------
                                                       (in thousands)

    Deferred tax assets:
    Net operating loss carryforwards            $25,314               $23,221
    Accrued intercompany interest                 3,097                 1,923
    Depreciation and amortization                 1,143                   236
    Reserve for contract loss                       278                   278
    Deferred rent                                    81                   112
    Other                                         3,323                 2,293
                                                -------               -------
      Total deferred tax assets                  33,236                28,063

    Deferred tax liabilities:
    Historical accrual to cash difference        (2,235)               (2,980)
    Investments in affiliates                      (433)               (6,250)
    Other                                           (85)                 (136)
                                                --------              --------
      Total deferred tax liability               (2,753)               (9,366)
                                                --------              --------

    Net deferred tax assets before allowance     30,483                18,697
    Less:  Valuation allowance                  (30,483)              (18,697)
                                                -------               -------
    Net deferred tax assets                     $    --               $    --
                                                =======               =======


         The Company has determined that $30.5 million in 1996 and $18.7 million
in 1995 of net deferred tax assets do not satisfy the  recognition  criteria set
forth in SFAS No. 109.  Accordingly,  a valuation allowance was recorded against
the applicable net deferred tax assets.


                                     - 75 -
<PAGE>



         At December 31, 1996, the Company had net operating loss  carryforwards
of approximately $65.4 million.  Of this consolidated total,  approximately $9.9
million of the  Company's  net  operating  loss  carryforwards  are available to
offset future Canadian-sourced  taxable income, if any. These loss carryforwards
expire  between 1999 and 2003. Of the remaining  balance,  American  Vaccine and
AMVAX had net operating loss  carryforwards of  approximately  $54.6 million and
$911,000, respectively, available to offset future United States taxable income,
if any. These loss carryforwards expire between 2002 and 2011.

         The net operating loss carryforwards  available to be used in any given
year may be limited due to significant  changes in ownership interests resulting
from future stock issuances or other changes in equity interests.

(12)  INDEMNIFICATION AGREEMENT

         In connection with the Merger described in Note 1, certain shareholders
of American Vaccine with significant  ownership  interests were required to file
gain  recognition  agreements with the United States Internal  Revenue  Service.
Under the terms of the gain  recognition  agreements,  these  shareholders  have
agreed to amend their  income tax  returns  for 1990 if the Company  disposes of
substantially  all of the stock or assets of American  Vaccine within a ten-year
period. With those amended returns, the shareholders will be required to pay tax
based on the  difference  between their basis in American  Vaccine stock and the
value,  at February 28, 1990, of the Company stock received in the Merger,  plus
interest  from the time of the Merger to the  disposition  of  American  Vaccine
stock or assets by the Company.

         In   connection   with  the  Merger,   the  Company   entered  into  an
indemnification  agreement with these  shareholders of American  Vaccine whereby
the Company will (i) lend to the affected shareholders,  on an interest-free and
after-tax  basis,  an amount  equal to the taxes to be paid with the amended tax
returns; and (ii) pay to the affected  shareholders,  on an after-tax basis, any
interest and penalties with respect to the taxes to be paid with the amended tax
returns.  Under the terms of the  indemnification  agreement,  repayment  of the
loans  described  above will only be required at the time and to the extent that
the affected shareholders receive benefit from the resulting increase in the tax
basis of their Company  stock.  There can be no assurance  that any such benefit
will be received.

         The  ultimate  amount  of this  potential  liability,  if  any,  is not
presently  determinable but will be based on the amount of gain,  interest rates
in effect during the period,  and the length of time between the consummation of
the  Merger  and the event  triggering  the gain  recognition.  Based on current
interest  rates,  the  Company  estimates  that,  in the  event  that  the  gain
recognition  would have occurred at December 31, 1996,  its  obligations  to the
affected shareholders could approximate $15.1 million.



                                     - 76 -
<PAGE>



(13)  LICENSE AGREEMENTS

         Certain of the conjugate  vaccine-related  technologies  transferred to
the  Company by BioChem in  connection  with the Merger are  licensed  under two
agreements with the National  Research Council of Canada (the "NRC"), a Canadian
federal governmental agency. Under these license agreements, the Company will be
required to pay royalties to the NRC on all sales of such licensed  products and
related services.  Certain minimum annual royalties are payable  irrespective of
the  volume  of sales of such  products  and  services.  BioChem  has  agreed to
reimburse the Company for 10 percent of these minimum annual royalties.  The NRC
has the right to  terminate  the  license  agreements  under  certain  specified
conditions  including if it concludes that all reasonable  efforts are not being
used to develop and commercialize the technologies.

         The  Company  has a  license  agreement  with  the  National  Technical
Information Service (the "NTIS"), an agency of the United States government,  to
bring the method of preparing  the acellular  pertussis  vaccine to the point of
practical application. In return, the NTIS granted an exclusive license to make,
have made, use and sell the vaccine following approval of commercial sale by the
FDA. Under the agreement, the Company will pay to the NTIS an annual maintenance
fee and a royalty based on sales or other similar  dispositions  of the vaccine.
The exclusive  rights under this agreement  will terminate  seven years from the
date of the first  commercial  sale of the  vaccine.  The Company has acquired a
royalty-bearing  exclusive  license for the use of this  patented  technology in
certain foreign jurisdictions for the full term of the patents.

(14)  SHAREHOLDERS' EQUITY

         (a) PREFERRED  STOCK.  Preferred  shares are  nonvoting  (other than as
required  by law) and may be  issued in one or more  series.  Shares of Series A
preferred stock are convertible,  at the option of the holder, into common stock
on the basis of two  shares of common  stock for each share of  preferred  stock
held. The preferred  stock had a liquidation  preference of Can. $2.50 per share
or U.S. $3.6 million in the aggregate at December 31, 1996. The conversion ratio
is subject to adjustment for certain dilutive events.

         (b) 1990 SHARE  OPTION  PLAN.  In 1990,  the Company  adopted the North
American Vaccine,  Inc. Share Option Plan (the "1990 Plan"),  which, as amended,
provided  for the  issuance  of up to  3,650,000  shares of its common  stock to
officers, directors,  employees and consultants. The 1990 Plan, which expired in
February 1995,  provided that options be granted at no less than market value on
the date of grant. In 1996 the Company  extended the expiration date for options
to purchase 540,000 shares of common stock  previously  granted under this plan.
These  options have been  accounted  for as new grants under the plan.  The fair
market  value of the  Company's  stock on the new  grant  date was less than the
exercise  price of these  options.  Subsequent to December 31, 1996, the Company
extended the expiration date for an option to purchase  150,000 shares of common
stock previously  granted under this plan, at an exercise price of $11.13.  This
option will be accounted  for as a new option  under this plan.  The fair market
value of the  Company's  common stock on the new grant date was greater than the
exercise price of the options,  which will result in compensation expense to the
Company in 1997.


                                     - 77 -
<PAGE>



         (c) 1995 SHARE  OPTION  PLAN.  In 1995,  the Company  adopted the North
American Vaccine,  Inc. 1995 Share Option Plan (the "1995 Plan"), which provides
for the  issuance of up to  1,000,000  shares of its common  stock to  officers,
directors,  employees  and  consultants.  The 1995 Plan,  which expires in March
2000,  provides that options be granted at no less than market value on the date
of the grant and may have a term of up to 10 years.

         The following table  summarizes  option activity  outside of any formal
stock  option plan and under both the 1990 Plan and the 1995 Plan for the period
from December 31, 1993, through December 31, 1996:

<TABLE>
<CAPTION>

                                             NUMBER OF SHARES
                                 ------------------------------------    
                                 1990 Plan     1995 Plan     Non-Plan      Exercise      Wtg.Avg.
                                  Options       Options       Options       Price       Exer.price
                                  -------       -------       -------       -----       ----------

<S>                              <C>           <C>           <C>         <C>            <C>
Balance at December 31, 1993      2,218,294          --      1,610,788   $ 1.19-12.88     $ 6.30
 
Granted                             150,000          --             --     9.88-13.63      12.38
Exercised                          (149,536)         --     (1,252,350)    1.19-12.88       3.38
Expired or canceled                (100,203)         --             --     9.00-12.88      10.74
                                 ----------     ---------   ----------   ------------     ------  
Balance at December 31, 1994      2,118,555          --        358,438     1.19-13.63       8.15

Granted                             172,500       505,000           --     9.13-14.13      12.44
Exercised                          (487,688)         --        (11,562)    1.19- 2.00       1.84
Expired or canceled                (156,467)         --             --     1.81-12.88      11.83
                                 ----------     ---------   ----------     -----------    ------  
Balance at December 31, 1995      1,646,900       505,000      346,876     1.56-14.13      10.34

Granted                             540,000        18,500           --    12.88-21.50      13.16
Exercised                          (428,231)           --     (231,252)    1.56-12.88       7.08
Expired or canceled                (558,987)      (24,000)          --     9.13-13.88      12.82
                                 ----------     ---------   ----------   ------------     ------  
Balance at December 31, 1996      1,199,682       499,500      115,624   $ 2.92-21.50     $11.59
                                 ==========     =========   ==========   ============     ======  
</TABLE>


         At  December  31,  1996,  under the 1990 Plan,  options to  purchase an
aggregate of 1,049,633  common shares were  exercisable  at prices  ranging from
$9.00 to $13.63 per share (weighted average exercise price per share of $11.68),
and no options were  available for grant.  At December 31, 1996,  under the 1995
Plan, options to purchase an aggregate of 168,235 common shares were exercisable



                                     - 78 -
<PAGE>


at prices  ranging from $11.25 to $13.88 per share  (weighted  average  exercise
price per share of  $13.57),  and  500,500  options  were  available  for grant.
Subsequent  to year end,  options to acquire an additional  110,000  shares were
granted under this plan at an exercise price of U.S. $24.50.

         In addition, non-plan options to purchase an aggregate of 57,812 shares
of common stock were  exercisable  at December 31, 1996, at a price of $2.92 per
share.  The weighted  average per share grant date fair value of options granted
during  1996 and 1995 for the 1990 plan was $5.11  and $4.53  respectively.  The
weighted  average per share grant date fair value of options granted during 1996
and 1995 for the 1995 plan was $10.59 and $8.40 respectively.

         (d) 1990  NON-EMPLOYEE  DIRECTOR AND SENIOR EXECUTIVE STOCK OPTION PLAN
("1990 SESOP") . In 1990, the Company adopted the 1990 SESOP, which, as amended,
provided for the  issuance of up to 1,850,000  shares of its common stock to all
the Company's non-employee directors, and senior executives who are residents of
Canada.  Under the 1990  SESOP,  which  expired in October  1995,  options  were
granted  automatically to each non-employee  director annually on January 1. The
1990 SESOP  required  that the  exercise  price must not be less than the market
value  of the  stock  at the  date of  grant.  Options  issued  to  non-employee
directors  under the 1990  SESOP are  exercisable  in  Canadian  currency,  vest
ratably  over a period of three  years and  expire  five  years from the date of
grant.  Upon a change of control of the Company,  all outstanding  stock options
granted under the 1990 SESOP become fully exercisable.

         (e) 1995  NON-EMPLOYEE  DIRECTOR AND SENIOR EXECUTIVE STOCK OPTION PLAN
("1995 SESOP").  In 1995, the Company adopted the 1995 SESOP, which provides for
the issuance of up to 500,000  shares of its common  stock to all the  Company's
non-employee  directors,  and its senior executives who are residents of Canada.
Under  the  1995  SESOP,  which  expires  in March  2000,  options  are  granted
automatically  to each  non-employee  director  annually  on January 1. The 1995
SESOP requires that the exercise price must not be less than the market value of
the stock at the date of grant.  Options issued to  non-employee  directors vest
ratably  over a period of three  years  and  expire  ten years  from the date of
grant.  Upon a change of control of the Company,  all outstanding  stock options
granted under the 1995 SESOP become fully exercisable.



                                     - 79 -
<PAGE>


         The following  table  summarizes  option  activity under the 1990 SESOP
plan and the 1995 SESOP plan from December 31, 1993 through December 31, 1996:

<TABLE>
<CAPTION>


                                      1990 Plan    1995 Plan  Exercise Price              Wtg.Avg.
                                       Options      Options       Can.$         U.S. $   Exer.price(U.S.)
                                     -----------   ---------  ---------------   -------  ----------------
<S>                                  <C>           <C>         <C>             <C>           <C>    
Balance at December 31, 1993          1,030,002           --     $ 1.40-15.10  $1.02-11.02     $ 5.29

Granted                                 130,000           --            14.56        10.62      10.62
Exercised                              (110,000)          --       1.40- 1.88   1.02- 1.37       1.11
Expired or canceled                     (50,000)          --      12.88-15.10   9.40-11.02      10.61
                                      ---------      -------     ------------  -----------     ------
Balance at December 31, 1994          1,000,002           --       1.40-15.10   1.02-11.02       6.17

Granted                                 120,000           --            11.75         8.57       8.57
Exercised                              (420,002)          --       1.40- 1.88   1.02- 1.37       1.21
                                      ---------      -------     ------------  -----------     ------
Balance at December 31, 1995            700,000           --       1.88-15.10   1.37-11.02       9.56

Granted                                      --      130,000               --        14.13      14.13
Exercised                              (199,999)          --       1.88-15.10   1.37-11.01       8.47
Expired or canceled                     (10,001)     (10,000)     11.75-14.56   8.58-14.13      11.69
                                      ---------     --------     ------------  -----------     ------ 
Balance at December 31, 1996            490,000      120,000     $11.75-15.10  $8.58-14.13     $10.82
                                      =========     ========     ============  ===========     ======

</TABLE>

         At December  31,  1996,  under the 1990  SESOP,  379,992  options  were
exercisable at prices  ranging from Can.  $11.75 to Can.  $15.10 (U.S.  $8.57 to
U.S.  $11.02) per share  (weighted  average U.S. price of $10.24) and no options
were available for grant under the 1990 SESOP.  At December 31, 1996,  under the
1995  SESOP,  there were no  exercisable  options to  purchase  shares of common
stock,  and 380,000  options were  available for grant.  Subsequent to year end,
options to acquire an additional  130,000 shares were granted under this plan at
an exercise price of U.S. $24.38. The weighted average per share grant date fair
value of options  granted  during  1995 for the 1990  SESOP plan was $3.91.  The
weighted  average per share grant date fair value of options granted during 1996
for the 1995 SESOP plan was $10.58.

         (f) STOCK BASED  COMPENSATION  PLANS. The Company applies the intrinsic
value based method of accounting pursuant to APB Opinion No. 25, "Accounting For
Stock Issued To Employees," and related  interpretations for option grants under
its stock based compensation plans.  Accordingly,  no compensation cost has been
recognized in the accompanying  financial statements.  Had compensation cost for
the  Company's  four stock option plans been  determined on the fair value based
method of SFAS 123,  "Accounting  for  Stock-Based  Compensation,"  at the grant
dates for awards under these plans,  the  Company's  net loss and loss per share
for 1996 and 1995 would have been $23.9 million or a loss of $0.78 per share and
$6.7 million or a loss of $0.22 per share, respectively.


                                     - 80 -
<PAGE>



         The  Black-Scholes  option  valuation  model was  developed  for use in
estimating the fair value of traded  options which have no vesting  restrictions
and are fully  transferable.  In addition,  option  valuation models require the
input of highly  subjective  assumptions  including  the  expected  stock  price
characteristics  significantly  different  from  those of  traded  options,  and
because changes in the subjective  input  assumptions can materially  affect the
fair  value  estimate,  in  management's  opinion,  the  existing  models do not
necessarily  provide a reliable single measure of the fair value of its employee
stock options.

         Pursuant to SFAS 123,  the fair value of each option grant is estimated
on the date of grant  using a  Black-  Scholes  option  pricing  model  with the
following  weighted  average  assumptions  used for  grants  in 1996,  and 1995,
respectively: risk-free interest rates of 6.04 to 7.59 percent for the 1990 Plan
options, 5.26 to 6.49 for the 1995 Plan options, 7.79 percent for the 1990 SESOP
options  and 5.21  percent  for the 1995 SESOP  options;  no  expected  dividend
yields;  expected  lives of 4 years for the 1990 Plan  options,  between 5 and 6
years for the 1995 Plan options, 4 years for the 1990 SESOP options, and 8 years
for the 1995 SESOP  options;  and  expected  volatility  of 78  percent.  Of the
2,424,806  options  outstanding at December 31, 1996,  1,655,672  options have a
weighted  average  remaining  contractual  life of approximately 2 years. All of
these options are  exercisable.  The remaining  769,134  options have a weighted
average remaining contractual life of approximately 6 years.


(15)  RETIREMENT AND SAVINGS 401(k) PLAN AND TRUST

         The Company's Retirement and Savings 401(k) Plan and Trust ("the Plan")
became effective April 1, 1991. The Plan is a qualified profit-sharing plan with
a  cash  or  deferred  compensation   arrangement  and  discretionary   matching
contributions. Under the Plan, eligible employees may elect to contribute to the
Plan by  salary  deferrals  up to an  annual  limit,  which is the  lesser of 20
percent of a  participant's  annual  compensation or the maximum allowed by law,
and the Company may contribute  matching amounts as provided by the Plan. Salary
deferrals  and matching  contributions  are vested  immediately.  The  Company's
matching  expense,  contributed in the form of the Company's  common stock,  was
$200,000, $135,000, and $109,000 for 1996, 1995, and 1994, respectively.

         The Company  may elect to make  additional  contributions  to the Plan,
from its current or  accumulated  net profits,  in the form of a profit  sharing
contribution.  This  discretionary  contribution  will be made for all  eligible
participants  regardless of whether such  participants make any salary deferrals
for that plan year. Profit sharing  contributions are vested ratably over a five
year  period.  From  inception  of the Plan,  the  Company has not made a profit
sharing contribution.


                                     - 81 -
<PAGE>



         The Plan provides for an overall  limitation with respect to the amount
of contributions (including company match, if any) which can be allocated to any
participant in any plan year.  This  limitation is the lesser of 25 percent of a
participant's annual compensation or the maximum allowed by law.

(16) RELATED-PARTY TRANSACTIONS

         Pursuant to the terms of the technology  transfer agreement executed by
the Company and BioChem at the time of the Merger,  the companies  shared in the
expenses  of  researching  and  developing  the  subject  vaccine  technologies,
including  expenses related to obtaining  applicable  patent rights.  In January
1995,  BioChem exercised its option under the technology  transfer  agreement to
terminate this joint  arrangement.  BioChem's portion of the expenses  including
reimbursements  for its share of minimum  annual  royalties as discussed in Note
12, was $2,200, $20,000, and $496,000 in 1996, 1995, and 1994, respectively.  In
addition,  BioChem paid certain  expenses for the  development  of the conjugate
vaccine  technologies  transferred  to the  Company  in the  Merger,  subject to
reimbursement  by the Company.  The Company's  portion of these expenses was $0,
$0,  and $1,200 in 1996,  1995,  and 1994,  respectively,  and are  included  in
research  and  development  in  the  accompanying   consolidated  statements  of
operations.  In 1994 the Company  also  received  $336,000  from BioChem for its
share of the costs of a withdrawn public offering.

         In 1994 the Company  sold  1,100,000  shares of common stock of BioChem
held by the  Company as  investment  securities  since  1990.  The sale of these
investment securities was pursuant to a negotiated  transaction at a discount of
approximately  10 percent from the then trading  price of that stock.  The sales
were made to thirteen purchasers, several of whom were directors of the Company.
All sales were made at the same price per share.

         In the Merger,  as discussed in Note 1, the Company and Biochem granted
to each other a one time demand  registration right (with expenses to be paid by
the party exercising the registration right) and certain piggy-back registration
rights,  through January 17, 1995. In connection with a proposed offering of the
Company's  stock in 1994 by both  BioChem and the  Company,  which  offering was
later withdrawn at BioChem's  request,  BioChem's  one-time demand  registration
right was extended through January 17, 1998.


                                     - 82 -
<PAGE>



ITEM 9.    CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
           ACCOUNTING AND FINANCIAL DISCLOSURE

           None.


                                    PART III

ITEM 10.   DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
           --------------------------------------------------

         The  information  required by this Item 10 is incorporated by reference
to the discussion under the headings "Election of Directors," "Identification of
Senior  Management"  and "Security  Ownership of Certain  Beneficial  Owners and
Management - Section 16(a)  Beneficial  Ownership  Reporting  Compliance" as set
forth in the Company's 1997 Proxy Statement.


ITEM 11.   EXECUTIVE COMPENSATION
           ----------------------

         The  information  required by this Item 11 is incorporated by reference
to the discussion under the heading  "Executive  Compensation"  and "Election of
Directors -  Compensation  of Directors"  set forth in the Company's  1997 Proxy
Statement.


ITEM 12.   SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
           MANAGEMENT
           ---------------------------------------------------

         The  information  required by this Item 12 is incorporated by reference
to the discussion under the heading  "Security  Ownership of Certain  Beneficial
Owners and Management" set forth in the Company's 1997 Proxy Statement.


ITEM 13.   CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
           ----------------------------------------------

         The  information  required by this Item 13 is incorporated by reference
to the  discussion  under the heading  "Certain  Transactions"  set forth in the
Company's 1997 Proxy Statement.


                                     - 83 -
<PAGE>




                                     PART IV

ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON
           FORM 8-K.
           -------------------------------------------------------

a)       DOCUMENTS FILED AS PART OF FORM 10-K.
         -------------------------------------

         The following documents are filed as part of this Annual Report on Form
10-K:

         1.    FINANCIAL STATEMENTS:                                       PAGE

               Report of Independent Public Accountants                     56
               Consolidated Balance Sheets as of 
                  December 31, 1996 and 1995                                57
               Consolidated Statements of Operations for the 
                  Years Ended December 31, 1996, 1995 and 1994              58
               Consolidated Statements of Shareholders' Equity 
                  for the Years Ended December 31, 1996, 
                  1995 and 1994                                             59
               Consolidated Statements of Cash Flows for the 
                  Years Ended December 31, 1996, 1995 and 1994              60
               Notes to Consolidated Financial Statements                   62

         2.    FINANCIAL STATEMENT SCHEDULES:
               
               None Required.

         3.    EXHIBITS:   See Exhibit Index on page 86.


(b)      REPORTS ON FORM 8-K.
         --------------------
                  None.



                                     - 84 -
<PAGE>



                                   SIGNATURES

         Pursuant to the  requirements  of Section 13 or 15(d) of the Securities
Exchange Act of 1934, North American  Vaccine,  Inc. has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized.


                                               NORTH AMERICAN VACCINE, INC.

Dated:  March 10, 1997                         By:  /s/ Sharon Mates
                                                    ------------------
                                                    Sharon Mates, President


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
this report has been signed  below by the  following  persons on behalf of North
American Vaccine, Inc. in the capacities and on the dates indicated.

Principal Executive Officer:

/s/ Sharon Mates                                                March 10, 1997
- -------------------------
Sharon Mates, Ph.D.
President

Principal Financial Officer And
Principal Accounting Officer:

/s/ Lawrence J. Hineline                                        March 10, 1997
- --------------------------
Lawrence J. Hineline
Vice President-Finance

<TABLE>
<CAPTION>

A Majority Of The Board Of Directors:

<S>                         <C>               <C>                            <C>
/s/ Francesco Bellini       March 10, 1997    /s/ Rondi R. Grey               March 3, 1997 
- --------------------------                    --------------------------                   
Francesco Bellini, Ph.D.                      Rondi R. Grey                                
                                                                                           
/s/ Alain Cousineau         March 10, 1997    /s/ Lyle Kasprick               March 10, 1997
- --------------------------                    --------------------------                   
Alain Cousineau                               Lyle Kasprick                                
                                                                                           
/s/ Jonathan Deitcher       March 10, 1997    /s/ Francois Legault            March 3, 1997
- --------------------------                    --------------------------                   
Jonathan Deitcher                             Francois Legault                             
                                                                                           
/s/ Denis Dionne            March 3, 1997     /s/ Sharon Mates                March 10, 1997
- --------------------------                    --------------------------                   
Denis Dionne                                  Sharon Mates, Ph.D.                          
                                                                                           
/s/ Neil W. Flanzraich      March 10, 1997     /s/ Richard C. Pfenniger, Jr.  March 10, 1997
- --------------------------                    ---------------------------                
Neil W. Flanzraich                            Richard C. Pfenniger, Jr.                    
                                                                                           
/s/ Phillip Frost           March 10, 1997    
- --------------------------                    
Phillip Frost, M.D.                              
                                                 
</TABLE>


                                     - 85 -
<PAGE>





                                 EXHIBIT INDEX


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

2.1      Master Agreement, dated October 25, 1989, among North American Vaccine,
         Inc. ("NAV"), American Vaccine Corporation ("American Vaccine") and IAF
         BioChem International, Inc. ("BioChem"). (1)

2.2      Agreement and Plan of Merger,  dated as of October 25, 1989, among NAV,
         American Vaccine and NAVA Acquiring Corp. (1)

2.3      Share  Purchase  Agreement,  dated  January 17,  1990,  between NAV and
         BioChem. (1)

2.4      Technology Transfer Agreement,  dated January 17, 1990, between NAV and
         BioChem. (1)

3.1      Articles of Incorporation of NAV, as amended. (1)(5)

3.2      Restated Bylaws of NAV. (2)

4.2      Specimen Certificate for NAV Common Shares. (1)

4.3      Specimen Certificate for NAV Preferred Shares. (1)

9.1      Shareholders' Agreement, dated January 17, 1990, among BioChem, Phillip
         Frost,  M.D.,  IVAX  Corporation  ("IVAX")  and  Frost-Nevada,  Limited
         Partnership ("Frost-Nevada"). (1)

10.1     License  Agreement,  dated July 27, 1987,  between Canadian Patents and
         Development  Limited  ("CPDL") and BioChem [with  certain  confidential
         information deleted therefrom]. (1)

10.2     License Agreement,  dated June 27, 1988, between CPDL and BioChem [with
         certain confidential information deleted therefrom]. (1)

10.3     Agreement,  dated April 6, 1989,  between AMVAX, Inc. ("AMVAX") and the
         National Institute of Child Health and Human Development ("NICHD"). (1)

10.4     License  Agreement,  dated March 25, 1988,  between National  Technical
         Information   Service   ("NTIS")   and  Selcore   Laboratories,   Inc.,
         predecessor to AMVAX ("Selcore") [with certain confidential information
         deleted therefrom]. (1)


                                     - 86 -
<PAGE>


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

10.5     Second Amended and Restated Patent License  Agreement,  dated March 12,
         1992,  between  Ronald  D.  Sekura,  Ph.D.,  and  AMVAX  [with  certain
         confidential information deleted therefrom]. (5)

10.6*    North American Vaccine, Inc. Share Option Plan, as amended. (7)

10.9     Form of  Indemnification  Agreement among NAV, American Vaccine,  IVAX,
         Frost-Nevada and Ronald D. Sekura, Ph.D. (1)

10.12    Lease  Agreement  dated December 31, 1987, as amended,  between Selcore
         and Indian Creek Holding Associates Limited Partnership. (1)

10.13    Modification No. 11 to Contract with NICHD dated January 31, 1991 [with
         certain confidential information deleted therefrom]. (3)

10.14    Supply Agreement  between AMVAX and Statens  Seruminstitut  dated March
         26, 1991 [with certain confidential information deleted therefrom]. (3)

10.16    Supply Agreement  between AMVAX and Statens  Seruminstitut  dated March
         26, 1991 [with certain confidential information deleted therefrom]. (3)

10.17    Research,  Development and License  Agreement between AMVAX and Statens
         Seruminstitut   dated  March  26,  1991  [with   certain   confidential
         information deleted therefrom]. (3)

10.18*   Non-Employee  Director  and Senior  Executive  Stock  Option  Plan,  as
         amended. (7)

10.19    Modification  No. 12 to  Contract  with NICHD dated April 1, 1992 [with
         certain confidential information deleted therefrom]. (6)

10.20    Contract  dated  April 9, 1992 with NICHD  [with  certain  confidential
         information deleted therefrom]. (6)

10.21    Modification  No. 13 to Contract  with NICHD dated  September  24, 1992
         [with certain confidential information deleted therefrom]. (7)

10.22    Amended and restated  master  agreement  dated June 20, 1994 among NAV,
         BioChem,  IVAX, D&N Holding  Company,  Frost-Nevada  and Phillip Frost.
         (10)

10.23    Share exchange  agreement dated April 20, 1994 between NAV and BioChem.
         (8)

10.24    Construction  Agreement  dated  July 18,  1994  between  AMVAX  and The
         Whiting-Turner Contracting Company. (9)


                                     - 87 -
<PAGE>



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

10.25*   North American Vaccine, Inc. 1995 Share Option Plan. (11)

10.26*   North  American  Vaccine,  Inc. 1995  Non-Employee  Director and Senior
         Executive Stock Option Plan. (12)

10.27    Clinical Development  Agreement dated December 22, 1995 between NAV and
         Pasteur Merieux SJrums et Vaccins  ("PMSV") [with certain  confidential
         information deleted therefrom]. (13)

10.28    License  Agreement  dated  December 22, 1995 between NAV and PMSV [with
         certain confidential information deleted therefrom]. (13)

10.29    Indenture dated May 7, 1996 between NAV and Marine Midland Bank. (14)

10.30    Registration  Rights Agreement dated May 1, 1996 between NAV,  Goldman,
         Sachs & Co. and UBS Securities LLC. (14)

10.31    Exclusive Distribution Agreement between Abbott Laboratories ("Abbott")
         and NAV dated October 11, 1996 [with certain  confidential  information
         deleted therefrom]. (15)

10.32    Stock Purchase Agreement dated October 11, 1996 between Abbott and NAV.
         (15)

10.33    Assets Purchase  Agreement  dated October 17, 1996 among NAV,  Cephalon
         Property  Management,  Inc.  ("CPMI") and Cephalon,  Inc. [with certain
         confidential information deleted therefrom]. (15)

10.34    Assignment  and  Assumption  of Leases dated  November 12, 1996 between
         CPMI and NAV.

10.35    Master  Agreement  dated  November  1,  1996  between  NAV and  General
         Electric Capital  Corporation  [with certain  confidential  information
         deleted therefrom].

21       Subsidiaries. (4)

23       Consent of Independent Public Accountants.

27       Financial Data Schedule.

__________________________

*        Management contract or compensatory plan or arrangement.

(1)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding exhibit in the Company's Form S-4 Registration  Statement
         (File No.  33-31512) filed with the Securities and Exchange  Commission
         and declared effective on January 24, 1990.

(2)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended June 30, 1990 (File No. 1-10451).


                                     - 88 -
<PAGE>



(3)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-K Annual Report for the
         Year Ended December 31, 1990 (File No. 1-10451).

(4)      This exhibit is incorporated  herein by this reference to Exhibit 22 in
         the Company's  Form 10-K Annual Report for the Year Ended  December 31,
         1990 (File No. 1-10451).

(5)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-K Annual Report for the
         Year Ended December 31, 1991 (File No. 1-10451).

(6)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended March 31, 1992 (File No. 1-10451).

(7)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-K Annual Report for the
         Year Ended December 31, 1992 (File No. 1-10451).

(8)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended March 31, 1994 (File No. 1-10451).

(9)      This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended June 30, 1994 (File No. 1-10451).

(10)     This exhibit is  incorporated  herein by this  reference to the Exhibit
         99.1 in the Company's  Registration Statement on Form S-3 (Registration
         No.  33-78002)  filed with the Securities  and Exchange  Commission and
         withdrawn from registration on November 23, 1994.

(11)     This exhibit is  incorporated  herein by this  reference to the Exhibit
         4.1 in the Company's  Registration  Statement on Form S-8 (Registration
         No.  33-80479)  filed with the Securities  and Exchange  Commission and
         effective as of December 15, 1995.

(12)     This exhibit is  incorporated  herein by this  reference to the Exhibit
         4.2 in the Company's  Registration  Statement on Form S-8 (Registration
         No.  33-80479)  filed with the Securities  and Exchange  Commission and
         effective as of December 15, 1995.

(13)     This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-K Annual Report for the
         Year Ended December 31, 1995 (File No. 1-10451).


                                     - 89 -
<PAGE>
 



(14)     This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended March 31, 1996 (File No. 1-10451).

(15)     This  exhibit  is   incorporated   herein  by  this  reference  to  the
         corresponding  exhibit in the Company's Form 10-Q Quarterly  Report for
         the Quarter Ended September 30, 1996 (File No. 1-10451).




                                     - 90 -

                                                                   Exhibit 10.34



                       ASSIGNMENT AND ASSUMPTION OF LEASES
                       -----------------------------------


             THIS ASSIGNMENT AND ASSUMPTION OF LEASES  ("Assignment") is entered
into as of the 12th day of  November,  1996,  by and between  CEPHALON  PROPERTY
MANAGEMENT,  INC.,  a  Delaware  corporation  ("Assignor")  and  NORTH  AMERICAN
VACCINE,   INC.,  a  Canadian  corporation   ("Assignee").   For  good  valuable
consideration,  the receipt and sufficiency of which is hereby acknowledged, the
parties covenant and agree as follows:

             1. ASSIGNMENT.  Assignor hereby  assigns,  transfers and sets over
unto Assignee,  and Assignee hereby accepts,  all of Assignor's right, title and
interest in and to (i) that certain  Lease dated  December 28, 1990 and Addendum
thereto,  (ii) that certain Lease dated  November 12, 1991 and Addendum  thereto
and (iii) that certain Lease dated March 20, 1992 and Addendum thereto,  each as
amended by that certain  Amendment to Leases dated November 12, 1992 and by that
certain letter dated December 29, 1992,  copies of which are attached hereto as,
respectively,  Exhibits "A"-"E" and made a part hereof (collectively as amended,
"Leases"),  each between TR Muirkirk  Corp.,  successor-in-interest  to Muirkirk
Manor Associates Limited Partnership, as landlord, and Assignor, assignee of Bio
Science  Contract  Production  Corp., as tenant,  which Leases pertain to Suites
260, 270, 280 and 290, 9000 Virginia Manor Road, Park Place, Beltsville,  Prince
George's County,  Maryland ("Premises").  This Assignment includes an assignment
to Assignee of all rights in and to all security deposits paid by Assignor under
the Leases, all allowances and amounts available for lessee  improvements to the
Premises,  and all refunds of rent or additional rent paid by Assignor under the
Leases.

             2. REPRESENTATIONS AND WARRANTIES. Assignor represents and warrants
to  Assignee  that:  (a)  Assignor  is the tenant  under the Leases and the sole
occupant  of the  Premises,  (b) the  Leases are the only  leases or  agreements
whereby any person has been  granted the right to use or occupy the  Premises or
any part thereof,  (c) Assignor has not previously assigned the Leases or sublet
the Premises and has received no notice of a prior assignment,  hypothecation or
pledge of the Leases or the rent payable thereunder, (d) there exists no default
by Assignor or to Assignor's knowledge,  the landlord, under the Leases, and, to
the best of Assignor's knowledge, no event, fact or circumstance which, with the
giving of notice or the passage of time,  or both,  would  constitute  a default
thereunder,  (e) the  security  deposits  due under the Leases have been paid in
full,  the amount of the security  deposits  has not been reduced to  Assignor's
knowledge,  and  Assignor's  interest  in the  security  deposits  has not  been
previously  pledged,  assigned or otherwise  transferred,  (f) the copies of the
Leases which are attached  hereto are true,  correct and complete and constitute
the entire  agreement  between  Assignor and the landlord under the Leases,  (g)
there are no actions or proceedings,  whether voluntary or involuntary,  pending
with respect to Assignor under any  bankruptcy,  insolvency,  debt adjustment or
similar  law of the  United  States  or any  state  thereof,  (h) to  Assignor's
knowledge,   the   landlord   under  the  Leases  has   fulfilled   all  of  its
representations,  warranties  and  agreements  under  the  Leases,  and  (i) the
construction and installation of all "lessee  improvements" to the Premises have




<PAGE>



been  completed  in all  respects in  accordance  with the Leases,  there are no
payments due the landlord  under the Leases or any other party from  Assignor or
due Assignor  from the  landlord  under the Leases in  connection  with any such
work, and the amount of $0.00 remains available for use in completing such work.

             3. PERFORMANCE.  Assignor shall be responsible  for the observance
and  performance  of all  agreements  and  obligations of the "Lessee" under the
Leases arising prior to the Effective Date (defined  below).  Assignee,  and not
Assignor,  shall  be  responsible  for the  observance  and  performance  of all
agreements and  obligations of the "Lessee" under the Leases arising on or after
the Effective Date.

             4. EFFECTIVE  DATE.   Notwithstanding  anything  to  the  contrary
contained  herein,  this Assignment  shall not become  effective until such date
("Effective Date"), if ever, that Assignor and Assignee (i) enter into an Assets
Purchase  Agreement  providing for  Assignee's  acquisition of certain assets of
Assignor   located  on  the  Premises  and  (ii)  consummate  the   transactions
contemplated thereunder.

             5. INDEMNITIES.  Assignor shall defend, protect, indemnify and save
harmless  Assignee  from and against any and all  liabilities,  suits,  actions,
losses, damages, costs and expenses, including, without limitation, counsel fees
and court costs,  suffered or incurred by Assignee resulting from or relating to
any  failure  by  Assignor  to  observe  or  perform  any of its  agreements  or
obligations under the Leases prior to the Effective Date. Assignee shall defend,
protect,  indemnify  and save  harmless  Assignor and  Cephalon,  Inc.  from and
against any and all liabilities,  suits,  actions,  losses,  damages,  costs and
expenses, including, without limitation,  counsel fees and court costs, suffered
or  incurred by Assignor or  Cephalon,  Inc.  resulting  from or relating to any
failure by Assignee to observe or perform any of its  agreements or  obligations
under the Leases accruing at or after the Effective Date.

             6. BINDING EFFECT; SUCCESSORS AND ASSIGNS. This Assignment shall be
binding  upon and  inure to the  benefit  of  Assignor  and  Assignee  and their
respective successors and assigns.

             7. FURTHER ASSURANCES. At Assignee's request, Assignor will execute
and deliver such documents and instruments and take such other actions as may be
requested reasonably from time to time by Assignee as necessary,  appropriate or
desirable  to carry out,  evidence  and  confirm the  intended  purposes of this
Assignment.

             8. GOVERNING  LAW.  This  Assignment  shall  be  governed  by  and
interpreted  and enforced in accordance  with the laws of the State of Maryland,
without giving effect to conflicts or laws principles.



                                      - 2 -


<PAGE>




             IN WITNESS  WHEREOF,  Assignor  and  Assignee  have  executed  this
Assignment as of the date first above written.


ATTEST:                              CEPHALON PROPERTY MANAGEMENT, INC.


/s/ Barbara S. Schilberg             By:/s/ J. Kevin Buchi
- --------------------------              ---------------------  
Name: Barbara S. Schilberg              Name: J. Kevin Buchi
      --------------------                    ---------------  
Title: Assistant Secretary              Title: Vice President
       -------------------                    ---------------

(Corporate Seal)

ATTEST:                              NORTH AMERICAN VACCINE, INC.


/s/ Russell P. Wilson                By:/s/ Daniel J. Abdun-Nabi
- ---------------------                   ------------------------
Name: Russell P. Wilson                 Name: Daniel J. Abdun-Nabi
      ---------------------                   --------------------
Title: Assistant Secretary              Title: Senior Vice President 
       -------------------                     - Legal Affairs
                                               ---------------------


(Corporate Seal)



                                      - 3 -


<PAGE>


                                   EXHIBIT "A"

                                   FIRST LEASE
                                   -----------

                                      LEASE
                                      -----

                                   (PARK PLACE)

         THIS LEASE, made as of this 28th day of December,  1990, by and between
MUIRKIRK MANOR ASSOCIATES LIMITED  PARTNERSHIP,  a Maryland Limited  partnership
("Lessor"),  and BIO SCIENCE CONTRACT PRODUCTION CORP., a Maryland  corporation,
("Lessee").


                              W I T N E S S E T H:
                              -------------------

         That in  consideration  of the rent and mutual covenants and agreements
contained  herein,  and intending to be legally bound hereby,  Lessor and Lessee
agree as follows:

         1.   DEMISED PREMISES
              ----------------

              The  Lessor  leases  to the  Lessee  all  of  that  certain  space
described as Suite No. 290, 9000 Virginia Manor Road,  containing  approximately
14,200  square feet of gross  leasable  area,  as is outlined in red on the plat
attached  to and  made a  part  of  this  Lease  as  Exhibit  "A"  (the  "Leased
Premises"),  and located in Park Place, Prince George's County, Maryland. Lessor
shall  construct and complete the Leased  Premises in compliance  with the plans
and  specifications  set forth in  Exhibit  "B"  attached  hereto  and made part
hereof.  "Delivery  of  Possession"  of the Leased  Premises by Lessor to Lessee
shall be deemed to have been made when Lessor's  architect  certifies in writing
that construction of the Leased Premises shall have been completed.

         2.   TERM
              ----

              The term (the  "Term")  of this  Lease  shall be for a term of Ten
(10) years,  commencing on the 1st day of March, 1991, (the "Commencement Date")
and shall  expire on the last day of  February,  2001.  If the Term of the Lease
does not begin on the date specified  herein for reasons other than the fault of
Lessee,  then the expiration date shall be moved for the commensurate  amount of
the delay and the rent shall be prorated  accordingly.  If the term commences or
ends  in  mid-month,  the  rent  payable  for  that  month  (including,  without
limitation,  Additional  Rent)  shall  be  prorated  and  paid  on the  date  of
commencement or termination.

         3.   RENT
              ----

              (a)  The rent (the "Base Rent") shall be:



                                      - 4 -


<PAGE>





            Year           Square Foot Rate
            ----           ----------------

              1                 $ 6.75
              2                 $ 7.75
              3                 $ 8.75
              4                 $ 9.50
              5                $ 10.00
              6                $ 10.30
              7                $ 10.61
              8                $ 10.93
              9                $ 11.26
             10                $ 11.59


The term "Lease Year" shall mean each twelve (12) month  period  during the term
of this  Lease  commencing  on the  Commencement  Date.  The Base Rent  shall be
payable,  in  advance,  in  equal  monthly   installments,   the  first  monthly
installment to be due and payable on the  Commencement  Date and each subsequent
monthly  installment  to be due and  payable  on the first day of each and every
month thereafter during the term of this Lease.

              (b)  All moneys  payable by Lessee  under the terms of this Lease,
other than Base Rent, as adjusted from time to time, shall be deemed "Additional
Rent."

              (c)  Lessee  shall make all  payments of Base Rent and  Additional
Rent on a  timely  basis,  without  demand  and  without  deduction,  setoff  or
counterclaim,  except as  expressly  permitted in Paragraph  29(b)  hereof.  All
payments  of Rent and  Additional  Rent  shall be made by good and valid  check,
payable to The Anastasi  Stephens Group,  Inc.,  agent,  4483 Forbes  Boulevard,
Lanham,  Maryland  20706,  or to such other  party or to such  other  address as
Lessor may designate  from time to time by written  notice to Lessee.  If Lessor
shall at any time or times  accept Base Rent or  Additional  Rent after it shall
become due and payable,  such acceptance  shall not excuse delay upon subsequent
occasions, or constitute,  or be construed as, a waive of any or all of Lessor's
rights  hereunder.  If any payment of Base Rent or  Additional  Rent is not made
within  ten (10) days of when due,  a late  charge of five  percent  (5%) of the
amount of such payment shall be imposed, Lessor shall be entitled to require the
payment of Base Rent and Additional Rent by certified check if the check for any
payment by Lessee shall be dishonored by its Bank.

              (d)  Except  for the  obligations  of Lessor  expressly  set forth
herein,  this  Lease is a "net  lease" and Lessor  shall  receive  the Base Rent
hereinabove  provided as net income from the Leased Premises,  not diminished by
any  imposition  of any expenses or charges  required to be paid to maintain and
carry the Leased  Premises or to continue the  ownership  of Lessor,  other than
payments  under any mortgages now existing or hereafter  created by Lessor,  and
Lessor is not and shall not be  required  to render any  services of any kind to
Lessee.




                                      - 5 -


<PAGE>





         4.   SECURITY DEPOSIT
              ----------------

              (a)  Lessee has, simultaneously  with the execution of this Lease,
deposited with Lessor, in cash or by check subject to collection, the sum of Ten
Thousand and No/100 Dollars ($10,000.00). Said deposit shall be held as security
for the faithful performance by Lessee of the terms,  covenants,  provisions and
conditions  of this  Lease.  It is agreed that in the event  Lessee  defaults in
respect to any of the terms, covenants, provisions and conditions of this Lease,
including (but not limited to) the payment of Base Rent or Additional  Rent, and
fails to cure any such defaults within applicable grace periods, Lessor may use,
apply or  appropriate  the whole or any part of the security so deposited to the
extent  required for the payment of any Base Rent or Additional  Rent or for the
curing of any  defaults by Lessee  hereunder  pursuant to  Paragraph  29 hereof;
provided,  however,  that no such  use,  application,  or  appropriation  of the
deposit shall be deemed to relieve  Lessee of any breach of this Lease and shall
be in addition to other remedies under this Lease.

              (b)  Should  the  entire   deposit  or  any  portion   thereof  be
appropriated and applied by Lessor under the foregoing  provisions,  then Lessee
shall (upon the written demand of Lessor) forthwith remit to Lessor a sufficient
amount in cash to restore  said  security to the  original  sum  deposited,  and
Lessee's  failure  to do so within ten (10) days  after  receipt of such  demand
shall itself constitute an event of default under this Lease.

              (c)  The security deposit (less any amounts applied as provided in
subsection  (a) above) shall be returned to Lessee within thirty (30) days after
the date  fixed as the end of the Term of this  Lease  and  delivery  of  entire
possession of the Leased Premises to Lessor.

              (d)  In the event of a sale, leasing or other transfer of the land
and building of which the Leased  Premises  forms a part,  Lessor shall have the
right to transfer the security and be released by Lessee from all  liability for
the return of such security deposit.  Lessee shall look to the new Lessor solely
for the return of said  deposit.  The  provisions of this  Paragraph  4(d) shall
apply to every  transfer or  assignment  made of the  security  deposit to a new
Lessor.

              (e)   Lessee covenants  that it will not  assign  or  encumber  or
attempt to assign to encumber  the  security  deposited  herein and that neither
Lessor  nor its  successors  or assigns  shall be bound by any such  assignment,
encumbrance, attempted assignment or attempted encumbrance.

              (f)  Lessee shall not be entitled to any  interest on the security
deposit, and such funds need not be segregated or held as escrow by Lessor.

              (g)  It is expressly understood  and agreed that,  in the event of
any  termination  of this  Lease or  re-entry  upon or  reletting  of the Leased
Premises on account of any default on the part of Lessee under this Lease, then,




                                      - 6 -


<PAGE>




and in such event, the deposit shall be retained and be subject to appropriation
by Lessor  until this  Lease  would,  by its terms,  have  expired  absent  such
default.

         5.   USE
              ---

              Lessee  will use and  occupy the  Leased  Premises  solely for the
purpose of Offices and operation of a vaccine research and production  facility.
The Leased  Premises  may not be used for any other  purpose  without  the prior
written consent of Lessor, which consent shall not be unreasonably withheld. The
Leased  Premises shall not be used for the storage,  distribution or sale of any
pornographic  or  "adult  rated"  materials.  Lessee  shall  not use the  Leased
Premises for any purpose or activity which is noxious or unreasonably  offensive
because of the emission of noise, smoke, dust,  vibration or odors. Tenant shall
not use the plumbing  facilities for any purpose injurious to same or dispose of
any  garbage or any other  foreign  substance  therein,  nor place a load on any
floor in the Leased  Premises  exceeding  the floor load of 250 per square  foot
which such floor was designed to carry, nor install,  operate and/or maintain in
the Leased  Premises and heavy  equipment  which could cause injury to the Lease
Premises,  nor  install,  operate  and/or  maintain in the Leased  Premises  any
electrical  equipment which will overload the electrical system therein,  or any
part hereof,  beyond its capacity for proper and safe operation as determined by
the Lessor or which does not bear underwriter's  approval.  Lessee shall not use
the Leased  Premises in any manner or for any purpose  which  violates any rule,
regulation, law, ordinance, or requirements of any governmental agency.

         6.   TAXES

              (a)  As  additional  rent  hereunder,  at least  thirty  (30) days
before  any fine,  penalty  or  interest  or cost may be added  thereto  for the
non-payment  thereof (or sooner if elsewhere herein required),  Lessee shall pay
throughout  the term of this Lease all  levies,  taxes,  assessments,  water and
sewer  rents and  charges,  liens,  charges for public  utilities  and all other
charges,  imposts  or burdens of  whatsoever  kind and nature  which at any time
during the term of this Lease may be assessed or imposed by any  federal,  state
or  municipal  government  or  public  authority,  or under  any law,  ordinance
regulation  thereof or pursuant to any recorded  covenants or agreements (all of
which are hereinafter referred to as "Impositions"), upon or with respect to the
Leased Premises,  any improvements  made thereto,  or this Lease.  Additionally,
Lessee shall pay a  proportionate  share of any imposition  which is not imposed
upon the Leased Premises as a separate entity but which is imposed upon the land
or the  building  or upon the  appurtenances,  leases,  rents,  transactions  or
documents  relating  to the lot or the  building.  Provided,  however,  that any
imposition  shall be apportioned for the first and last fiscal tax years covered
by the term hereof.  "Impositions" shall include, but not be limited to, any and
all governmental or  quasi-governmental  levies,  fees,  assessments,  taxes and
charges,  general  and  special,   ordinary  and  extraordinary,   foreseen  and
unforeseen,  of any kind and nature  whatsoever,  with  respect to such land and


                                      - 7 -


<PAGE>



building  (excluding  taxes paid on Lessor's  income but including  sales tax or
excise tax imposed by any  governmental  authority upon the Base Rent payable by
Lessee hereunder).

              (b)  Notwithstanding  the foregoing  provisions of this Article 6,
Lessor shall have the right,  at its option,  to require Lessee to pay to Lessor
or to any  mortgagee,  at the time when the monthly  installment of Base Rent is
payable,  an amount equal to  one-twelfth  (1/12) of the annual  Impositions  as
estimated by Lessor. If Lessor elects to have Lessee make such payments,  Lessee
also  shall  pay to Lessor  or to such  mortgagee,  as the case may be, at least
thirty (30) days before any fine, penalty, interest or cost may be added thereto
for the non-payment  thereof,  the amount by which the Impositions  becoming due
exceed the monthly  installment  payments on account thereof  previously made by
Lessee.  Should  Lessee's  monthly  installment  payments on account of Lessee's
share of Impositions for any tax year exceed the actual amount of Lessee's share
of such  Impositions,  the excess  amount  shall be  credited  against  Lessee's
installments for Impositions thereafter becoming due. The amounts paid by Lessee
pursuant to this  paragraph (b) shall be used to pay the  Impositions,  but such
amounts  shall not be deemed to be trust funds and no interest  shall be payable
thereon.

              (c)  During any part of the Term of this Lease which shall be less
than a full tax  fiscal  year,  any Taxes  shall be pro  rated on a daily  basis
between  the  parties,  to the end that Lessee only shall pay its share of Taxes
attributable to the portion of the tax fiscal years occurring within the term of
this Lease.

              (d)  Lessee shall pay  promptly,  and when due,  all taxes,  fees,
licenses,  assessments  and other charges levied or imposed upon the business of
the  Tenant  or upon  any  fixtures,  furnishings  or  equipment  in the  Leased
Premises.

              (e)  If due to a future change in the method of taxation or in the
taxing authority,  a franchise,  gross receipts,  transit,  rent or other tax or
other  governmental  imposition,  however  designated,  shall be levied  against
Lessor in  substitution  (in whole or in part)  for,  or in  addition  to,  said
"Impositions"  as  currently  defined),  then such  franchise,  gross  receipts,
transit,  rent or other tax or  governmental  Impositions  shall be deemed to be
included within the definition of "Impositions"  for the purposes of this Lease.
The term  "Impositions"  also  includes  all costs  reasonably  incurred  in any
proceeding brought by Lessor to reduce said Taxes.

              (f)  Lessor may  institute  any  proceedings  with  respect to the
assessed valuation of Park Place or any part thereof, and Lessee shall cooperate
with, and participate in, any and all such  proceedings.  If, after Lessee shall
have made the required payment of Taxes hereunder, Lessor shall receive a refund
of any portion thereof,  then, within thirty (30) days after Lessor's receipt of
such refund, Lessor shall pay to Lessee Lessee's pro rata share of the amount of
the  refund,  less all  costs  and  expenses  (including,  but not  limited  to,
attorneys' and appraiser'  fees) expended for incurred in obtaining such refund.
Lessee may not institute any proceedings with respect to the assessed  valuation
of Park Place or any part thereof.


                                      -8-
<PAGE>


         7.   UTILITIES
              ---------

         Starting with the Commencement Date and continuing  throughout the Term
of this Lease, Lessee shall be solely responsible for and shall pay, as and when
the same become due and payable and as hereinafter  provided,  all rents, rates,
costs and charges for water  services,  sewer service,  electricity,  gas, heat,
steam,  power,  telephone  (and  other  communication  services),  and any other
utilities or services  rendered or supplied to, upon or in  connection  with, or
used or consumed  within or in  servicing,  the Leased  Premises,  and all other
utility costs and expenses involved in the use of the Leased Premises throughout
the term of this  Lease,  and Lessee  shall  indemnify  Lessor  and save  Lessor
harmless  against  any  costs  liability  or  damages  on such  account.  Unless
otherwise  agreed in writing by Lessor or Lessee,  Lessee  shall,  promptly upon
Delivery of Possession of the Leased  Premises and at Lessee's own expense,  pay
for the  installation of separate meters for all utilities  servicing the Leased
Premises  and place said meters and  related  utility  accounts in Lessee's  own
name.  Lessee shall pay all separately  metered charges to the respective public
utility companies.  With respect to each utility which is not separately metered
for the Leased Premises,  Lessee shall pay Lessor, as Additional Rent,  Lessee's
proportionate  share of the total cost and fees therefore  attributable to those
areas of the warehouse/office buildings which are not separately metered.

         8.   COMMON AREA MAINTENANCE
              -----------------------

              (a)  Subject to the  provisions  of this Lease,  Lessor  grants to
Lessee, its employees, agents, customers and invitees during the Term hereof the
non-exclusive use, in common with Lessor and other tenants and occupants of Park
Place and their  respective  employees,  agents,  customers  and invitees and in
common  with such  others  as Lessor  may  designate  from time to time,  of all
non-allocated  parking  areas  within Park Place for  pedestrian  and  vehicular
ingress and egress and the accommodation and parking areas within Park Place for
pedestrian and vehicular  ingress and egress and the  accommodation  and parking
automobiles as required by the Lessee in conducting  normal business  activities
of Lessee within the Leased  Premises.  Lessor reserves the right,  however,  to
designate certain portions of the parking areas within Park Place for parking of
trucks,  vans, and other vehicles,  and to designate for the specific account of
Lessee,  or other  tenants  in Park  Place,  specific  parking  areas or  spaces
constructed within Park Place.  Notwithstanding anything contained in this Lease
to the contrary, Lessor shall have the right, at any time and from time to time,
to change the size,  location  and nature of the  parking  areas (so long as the
number of parking  spaces is not reduced)  and/or other common areas within Park
Place. All parking areas and related facilities which may be furnished by Lessor
in or near the Leased Premises,  including  employee parking areas, truck way or
ways, loading docks, pedestrian sidewalks and ramps, landscaped areas, and other
areas and  improvements  which may be provided by Lessor for the general use, in
common with Lessor and other tenants,  and their respective  employees,  agents,
customers  and invitees,  shall at all time be subject to the exclusive  control


                                       -9-

<PAGE>



and management of Lessor, and Lessor shall have the right, from time to time, to
establish,  modify and enforce  reasonable rules and regulations with respect to
all parking areas and other  facilities and areas  mentioned in this  paragraph.
Lessee agrees to abide by and conform with all such rules and  regulations  upon
notice thereof and to cause its employees,  agents, customers and invitees to do
the same.  Lessor shall have no liability to Lessee for use of the parking areas
by Lessor or other  tenants  and  occupants  of Park Place and their  respective
employees, agents, customers, or other third parties. No provision of this Lease
shall be  construed  as a demise to Lessee of the  parking  or any other  common
area) within Park Place.  If any repairs  (excluding  repairs caused by Lessee's
normal  use) to the  parking  or  other  common  areas  within  Park  Place  are
necessitated  by reason  of any act or  omission  by  Lessee  or its  employees,
agents, customers or invitees, then, if Lessor chooses to do so, Lessor may make
such repairs and Lessee shall promptly upon demand reimburse Lessor for the full
costs to the extent same are not covered by Lessor's  insurance,  or at Lessor's
option,  Lessor may notify Lessee of the necessity for such repairs, and Lessee,
at its cost and expense,  shall,  with due  diligence,  commence and complete to
Lessor's  satisfaction  the repairs within ten (10) days of Lessee's  receipt of
such notice.

              (b)  "Common  Area  Charges"  means all of the costs and  expenses
which are incurred by Lessor with respect to operation, management,  maintenance
and security of the building  including the parking and other designated  common
areas in Park Place and the exterior  walls of the buildings in Park Place,  and
those areas of Park Place which house mechanical,  electrical or other equipment
or are otherwise  determined from time to time by Lessor to be used in operating
or maintaining Park Place.  "Common Area Charges"  include,  but are not limited
to,  the cost of  maintaining,  repairing,  and  replacing  and  repaving  (when
necessary) the parking and other designated  common areas;  supplies,  tools and
materials  purchased and/or used in connection with repairs,  maintenance and/or
replacements;  wages,  salaries,  and fringe  benefits of all  employees  of the
Lessor for the  portion  of time they are  directly  engaged  in the  operation,
maintenance  and  security  of Park  Place,  including  license  and  fees  (but
excluding wages, salaries and benefits of executive  employees);  removing snow,
ice,  and debris from the  roadways  and parking  areas for  Lessee's use during
normal  business hours;  removal of customary and normal trash;  maintaining and
repairing or repainting (when necessary)  directional signs,  pavement markings,
and parking lot  striping;  repairing  and replacing  (when  necessary)  outdoor
lighting  facilities;  maintaining  the  grass  and  otherwise  caring  for  the
replanting (when  necessary) all shrubbery and landscape  areas;  providing such
security as Lessor,  in its sole  discretion,  deems  advisable;  accounting and
legal fees for common areas at Park Place; utilities,  heating,  ventilation and
air-conditioning charges allocable to designated common areas and other building
service areas.

              (c)  Starting with the Commencement Date and continuing throughout
the Terms of this  Lease,  Lessee  shall pay Lessor in  advance  as  hereinafter
described and as Additional  Rent,  Lessee's  Pro-Rata  Share of all Common Area
Charges for said period.  "Lessee's  Pro-Rata  Share"  shall be a fraction,  the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within all buildings in Park
Place. The Initial Lessee's Pro-Rata Share shall be 8%.


                                      -10-
<PAGE>



              (d)  On or before the  Commencement  Date, on or before the end of
each and every Lease year,  and at such other time(s) as is deemed  desirable by
lessor in its sole  discretion,  Lessor  shall  forward to Lessee a "Common Area
Charges  Statement",  which shall contain Lessor's latest estimate of the Common
Area  Charges  for the then  current or the then  upcoming  (as the case may be)
Lease Year,  and a statement  of Lessee's  Pro-Rata  Share  thereof.  Landlord's
failure to forward,  or to timely  forward,  any Common Area  Charges  Statement
shall not excuse Lessee from its liability for Lessee's Pro-Rata Share of Common
Area Charges.

              (e)  Each  month  during the Term of this  Lease,  along with each
monthly  installment of Base Rent,  beginning with the Commencement Date, Lessee
shall pay to Lessor,  in advance,  an amount  equal to  one-twelfth  (1/12th) of
Lessee's  Pro-Rata  Share of the  Common  Area  Charges as set forth in the then
latest Statement.  If the Commencement Date is a day other than the first day of
a calendar month, then the amount of Common Area Charges due for the first month
and the last month of the Term shall be pro rated on the basis of a thirty  (30)
day month. As soon as practicable near the end of each and every Lease Year, but
no later than 90 days after the end of the Lease year,  Lessor  shall  submit to
Lessee an "Actual Common Area Charges Statement" prepared by Lessor showing what
the Common Area Charges for the then preceding  Lease Year actually  were.  With
the next monthly  installment  of Base Rent due after  Lessee's  receipt of such
Statement,  Lessee shall pay Lessor or Lessor shall credit  Lessee,  as the case
may be the difference  between Lessee's Pro-Rata Share of the actual Common Area
Charges  for said  Lease  Year as shown on said  Statement  and the total of all
Common Area Charges paid by Lessee to Lessor for said Lease Year.

         9.   NON-LIABILITY OF LESSOR
              -----------------------

              (a)  Except  as  otherwise  expressly  provided  in this  Lease or
unless caused by the negligence or intentional  misconduct of Lessor or Lessor's
employees,  agents  and  contractors  while  acting  within  the  scope of their
employment,  Lessor shall not be responsible or liable to Lessee for any loss or
damage to persons or property,  or any  interference or interruption of Lessee's
use of the Leased  Premises,  that may be occasioned by (i) water,  gas,  steam,
wind or the bursting, stoppage or leaking of any pipes, sewer or water lines, or
other  conduits,  fixtures or equipment;  (ii) the  interruption  of any utility
services  to the  Leased  Premises  caused  by the  utility  company;  (iii) any
repairs,  alterations,  maintenance or additions to the Leased  Premises or land
and  building of which they are a part;  (iv) any  casualty;  (v) theft or other
criminal  conduct;  or (vi) the acts or omissions of persons occupying any space
adjacent to the Leased Premises.

              (b)  No  provisions  of this  lease  shall be deemed to confer any
rights  upon any persons or  entities  other  than the  parties  to this  Lease,
permitted successors and assigns and mortgages.


                                      -11-
<PAGE>



              (c)  Notwithstanding  anything  to the  contrary  provided in this
Lease, it is  specifically  understood and agreed that there shall be absolutely
no personal  liability on the part of Lessor,  including  partners in Lessor and
their  respective  successors  and assigns,  with respect to its  performance or
observance of any of the terms, covenants and conditions of this Lease, and that
Lessee shall look solely to the equity of the Lessor in the land and building of
which the Leased  Premises  form a part for the  satisfaction  of each and every
remedy  of Lessee  in the  event of any  breach  by Lessor of any of the  terms,
covenants  and  conditions  of this Lease to be performed or observed by Lessor,
such exculpation of personal  liability to be absolute and without any exception
whatsoever.

              (d)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations under this Lease,  Lessee may seek and enforce specific  performance
of the Lease against Lessor and pursue such other  equitable  remedies as may be
available to Lessee.  Notwithstanding  the foregoing,  the result of such action
shall be subject to the provisions of Paragraph 9(c) hereof.

         10.  INDEMNITY
              ---------

              Lessee  agrees to  indemnify  and save  Lessor  harmless  from and
against any and all claims,  demands,  costs and  expenses  (including,  but not
limited  to,  reasonable  attorneys'  fees  and  litigation  costs)  for,  or in
connection  with,  any  accident,  injury or damage  whatsoever to any person or
property (i) arising directly or indirectly out of Lessee's use or occupation of
the Leased  Premises,  (ii) occurring in, on or about the Leased  Premises or on
the sidewalks  adjoining the same, or (iii) arising  directly or indirectly from
any act or  omission of Lessee or any of Lessee's  licenses,  servants,  agents,
employees or  contractors.  The foregoing  indemnity shall not apply to any such
claim or demand proximately caused by the negligence or misconduct of Lessor, or
its  employees,  agents and  contractors  while acting within the scope of their
employment.

         11.  LIABILITY INSURANCE
              -------------------

              (a)  Lessee,  at Lessee's sole expense,  shall obtain and maintain
in  effect at all  times  starting  with the  Commencement  Date and  continuing
throughout the term of this Lease, a policy or policies of comprehensive general
public liability insurance,  insuring Lessor,  Lessor's  mortgagee(s) and Lessee
against any liability for injury, death or property damage occurring upon, in or
about any part of the Leased Premises or any  appurtenances  thereto,  affording
protection  to the limits of not less than One Million  Dollars  ($1,000,000.00)
with  respect  to bodily  injury or death of any one  person,  and not less than
Three Million Dollars  ($3,000,000.00) with respect to any one incident, and not
less than Five Hundred Thousand Dollars  ($500,000.00)  with respect to property
damage.  The foregoing  minimum  limits may, at Lessor's  option and upon thirty
(30) days' notice to Lessee, be increased from time to time to reflect inflation
or changed conditions.

              (b)  The insurance  policy(ies)  required to be procured by Lessee
under this Lease:


                                      -12-
<PAGE>


              (i)   Shall be issued by a reputable insurance company licensed to
do  business  in the State of  Maryland  and shall have such form and content as
shall be approved by Lessor.

              (ii)  Shall  be written  as  primary   policy   coverage  and  not
contributing with, or in excess of, any coverage which Lessor may carry.

              (iii) Shall have an endorsement  thereto to the effect that no act
or omission by Lessee shall affect the  obligation  of the insurer to pay Lessor
the full  amount of any loss  sustained  by Lessor and shall  contain an express
waiver of any right of subrogation by the insurance company against Lessor,  its
agents and employees.

              (iv)  Shall name Lessor as an additional named insured.

              (c)  On or before the Commencement Date, and at least fifteen (15)
days before the expiration date of the policy,  Lessee shall deliver to Lessor a
certificate  of insurance  evidencing  the  existence  and good  standing of the
liability  policy  referred to in Paragraph  11(a),  together  with  evidence of
payment of all premiums.  The insurance  required to be carried under this Lease
may be carried  under a blanket  policy  covering the Leased  Premises and other
locations of Lessee. The insurance policy required to be carried by Lessee shall
provide  that such  insurance  policy  shall not be canceled  unless  Lessor and
Lessor's mortgagee(s) shall have received thirty (30) days' prior written notice
of cancellation.  In the event that Lessee shall,  prior to the thirtieth (30th)
day  before  any  insurance  policy  will  lapse or  terminate,  fail to furnish
evidence of the coverage and pay the premium therefor for a period not exceeding
one year,  and the  premiums  so paid by Lessor  shall be payable by Lessee,  on
demand, as Additional Rent.

         12.  HAZARD INSURANCE
              ----------------

              (a)  Starting with the Commencement Date and continuing throughout
the Term of this  Lease,  Lessee  shall pay to Lessor,  or such  other  party as
Lessor shall designate by written notice to Lessee, as Additional Rent, Lessee's
Pro-Rata Share, as defined in Paragraph 12(e) hereof,  of the premiums and other
charges (the "Premiums") that may be incurred or contracted for or by Lessor for
fire and casualty  insurance  coverage  for the land and  buildings of which the
Leased  Premises form a part,  including  protection  from such perils as may be
insured against under a broad form extended coverage  endorsement or on all risk
of physical loss policy,  and further  including  loss of rental  coverage in an
amount equal to the Rent for one (1) Lease Year.  The premiums for all insurance
to be  obtained  by  Lessor  under  this  Paragraph  12(a)  shall be  reasonably
competitive  with the  premiums  charged for  similar  insurance  protection  by
reputable  insurers for  comparable  properties.  Lessee agrees that it will not
store  gasoline or other  explosive,  flammable or toxic  material in the Leased
Premises or do anything which may cause Lessor's  insurance  company to void the
policy covering the Leased Premises or to increase the premium thereon, and that


                                      -13-
<PAGE>



Lessee will  immediately  conform to all rules and regulations from time to time
made or established by Lessor's  insurance  company or insurance  rating bureau.
Lessor will do everything reasonably possible and consistent with the conduct of
Lessee's  business  to obtain the lowest  possible  rates for  insurance  on the
Leased Premises.  If, however,  the cost to Lessor of obtaining insurance on the
Leased  Premises  (or the  building  which the Leased  Premises  are located) is
increased  due to the  Lessee's  occupancy  thereof,  and the  Lessor's  insurer
provides evidence that said increase is the direct cause of Lessee's  occupancy,
Lessee agrees to pay,  promptly  upon demand,  as  additional  rental,  any such
increase.

              (b)  On or before the Commencement Date and before the due date of
each and  every  bill for the  Premiums,  Lessor  shall  forward  to  Lessee  an
"Insurance  Statement" which shall contain an estimated  statement of the amount
due from Lessee from time to time as Lessee's  Pro-Rata  Share of the  Premiums.
Lessor's failure to forward, or to timely forward, any Insurance Statement shall
not  excuse  Lessee  from  its  liability  for  Lessee's  Pro-Rata  Share of the
Premiums.

              (c)  Each and every  month  during the Term of this  Lease,  along
with its monthly installment of Fixed Rent,  beginning on the Commencement Date,
Lessee  shall pay  Lessor  an amount  equal to  one-twelfth  (1/12) of  Lessee's
Pro-Rata  Share  of the  Premiums  as set  forth in the  then  latest  Insurance
Statement,  which  shall  be  credited  toward  Lessee's  Pro-Rata  Share of the
Premiums when the same are due and payable.  Should Lessee's monthly installment
payments on account of Lessee's Pro-Rata Share of the Premiums for the period to
which the Premiums relate exceed the actual amount of Lessee's Pro Rata Share of
such Premiums, the excess amount shall be credited against Lessee's installments
for Premiums thereafter becoming due. If the Commencement Date is other than the
first day of a period to which the Premiums relate, then the installments of the
Premiums  due from the Lessee  shall be pro rated on the basis of a thirty  (30)
day month.

              (d)  Notwithstanding  the  provisions  of  Paragraph  12(c) above,
Lessor may, upon ten (10) days' written notice to Lessee,  require Lessee to pay
Lessee's  Pro- Rata Share of the  necessary  increased  Premiums due to Lessee's
occupancy at such times as the  Premiums  are due and payable to the  respective
insurance  company or companies or in such manner as is required of Lessor under
any mortgage, whether such payments be in lump sum or other installments.

                  (e)  Lessee's  Pro-Rata  of the  Premiums  shall be of all the
Premiums due for the land and building of which the Leased Premises form a part.
As used in this Paragraph 12, "Lessee's Pro Rata Share" shall be a fraction, the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within the building of which
the Leased Premises form a part.

              (f)  Lessor  hereby   releases   Lessee  from  any  liability  and
responsibility  to Lessor to anyone  claiming  through or under Lessor by way of
subrogation or otherwise,  for any and all loss or damage to the Leased Premises


                                      -14-
<PAGE>



caused by fire or any  casualty  covered by  insurance  to the extent  insurance
proceeds are received  therefor,  even if such fire or other casualty shall have
been caused by the fault or negligence of Lessee,  or anyone for whom Lessee may
have been responsible.  Lessor's  insurance  policies shall include  appropriate
clauses (i) waiving all rights of  subrogation  against  Lessee with  respect to
losses payable under such  policies,  and (ii) agreeing that such policies shall
not be  invalidated  should the insured waive in writing prior to a loss any and
all rights of recovery against the other party hereto for losses covered by such
policies.

         13.  DAMAGE TO THE DEMISED PREMISES
              ------------------------------

              (a) In the event of partial or total damage or  destruction of the
Leased  Premises  by fire,  other  casualty,  or any  cause  whatsoever  (except
condemnation),  Lessee shall give immediate  notice to Lessor.  If the damage or
destruction  is insured  against by Lessor,  this Lease  shall  continue in full
force and effect,  and, to the extent that insurance  proceeds  respecting  such
damage or  destruction  are  subject  to being  utilized  and,  in fact,  may be
utilized by Lessor for repair,  Lessor shall cause such damage or destruction to
be repaired with reasonable speed at the expense of Lessor,  except as otherwise
hereinafter  provided  in this  Paragraph  13. If in the  reasonable  opinion of
Lessor the damage or destruction  is such that repair thereof cannot  reasonably
be  completed  within  ninety  (90) days of the date the  damage or  destruction
occurs,  Lessor  shall have the right to  terminate  this Lease by the giving of
written  notice to such effect to Lessee  within thirty (30) days of the date of
Lessor's receipt of Lessee's notice of damage or destruction.  In no event shall
Lessor be  required  to restore or repair  Lessee's  personal  property or other
contents within the Leased Premises.  Due allowance shall be made for reasonable
delay which may arise by reason of Lessor's  adjustment of loss under  insurance
policies  and on account of labor  troubles or any other cause  beyond  Lessor's
control. To the extent that the Leased Premises are rendered  untenantable,  the
Rent  and  Additional  Rent  shall  proportionately  abate.  If  the  damage  or
destruction  is not covered by  insurance  maintained  by Lessor or if insurance
proceeds  respecting the damage or destruction are not subject to being utilized
for repair and, in fact, may be not so utilized, Lessor shall not be required to
repair the damage or  destruction.  In the event the damage or destruction is so
extensive to the  building of which the Leased  Premises are a part as to render
it uneconomical, in Lessor's opinion, to restore the Leased Premises, the Lease,
at the option of Lessor,  shall be terminated  upon written notice to Lessee and
Lessee shall immediately thereafter vacate the Leased Premises and surrender the
same to Lessor.  No such termination  shall release Lessee from any liability to
Lessor from any of the  obligations or duties imposed on Lessee under this Lease
prior  to the  damage.  Upon  any  termination  of this  Lease  pursuant  to his
Paragraph 13(a),  Rent and Additional Rent shall be prorated and adjusted to the
date of such termination.

              (b) Lessee  hereby  waives any and all right of recovery  which it
might  otherwise  have against  Lessor,  its agents and  employees,  for loss or
damage to Lessee's contents, furniture, furnishings, fixtures and other property
removable  by Lessee under the  provisions  of this Lease to the extent that the


                                      -15-
<PAGE>



same is to be covered by Lessee's insurance  thereunder,  except where such loss
or damage  may  result  from the  negligence  of fault of  Lessor,  its  agents,
employees or contractors.

         14.  EMINENT DOMAIN
              --------------

              (a) If during the term of this Lease, the Leased Premises, or such
a  substantial  portion of the Leased  Premises  as shall  prevent  Lessee  from
conducting its normal business, shall be taken by proper authority for public or
quasi-public  use, then Lessee may terminate this Lease by giving Lessor written
notice of  termination  within  thirty (30) days after  receipt of notice of the
taking,  and Lessee's  obligation  to pay rent,  taxes,  and other charges shall
terminate as of the date of the termination notice. If only a part of the Leased
Premises is taken and the part not taken shall be reasonably  sufficient for the
purpose of conducting Lessee's normal business,  this Lease shall remain in full
force  and  effect,   except  that  the  Rent  and  Additional   Rent  shall  be
proportionately reduced.

              (b) All compensation awarded for any taking shall belong to and be
the property of Lessor. Nothing contained herein, however, shall be construed to
preclude  Lessee from  prosecuting  any claim  directly  against the  condemning
authority  for loss of  business or  depreciation,  damage or cost of removal of
personal property  belonging to Lessee so long as the claim does not diminish or
otherwise  adversely  affect  Lessor's award or the award  otherwise  payable to
Lessor's mortgagee.

         15.  CONDITION OF LEASED PREMISES; MAINTENANCE AND REPAIR
              ----------------------------------------------------

              (a) Except for the repairs that Lessor is  specifically  obligated
to make  under  Paragraph  15(b)  hereof,  and  except  for  repairs  covered by
contractor  warranties held by Lessor for Lessor's  benefit,  during the term of
this Lease,  Lessee, at Lessee's sole cost and expense,  shall promptly make all
repairs,  perform all maintenance,  perform all custodial  services and make all
replacements  in and to the Lease  Premises  that are necessary in order to keep
the  Leased  Premises  in good  order and  repair  and in a safe and  tenantable
condition. Without limiting the generality of the foregoing, Lessee, at its sole
cost and expense,  is specifically  required to make promptly all repairs to (i)
any pipes,  water and waste lines,  ducts,  wires or conduits  beneath or in the
Leased  Premises  or within the ceiling of the Leased  Premises;  (ii) any glass
windows included within the Leased Premises;  (iii) Leasee's  sign(s);  (iv) any
electrical,  natural gas (if any),  heating,  ventilating and air  conditioning,
plumbing,  and other  systems,  equipment,  fixtures  and items  installed in or
servicing the Leased Premises; (v) the floors,  ceilings and walls of the Leased
Premises;  (vi) the entrance and exit and auxiliary driveways, if any, which are
part of and  service  the Leased  Premises;  and (vii) any portion of the Leased
Premises  damaged by Lessee's use or occupancy of the Leased  Premises or by any
act,  omission or  negligence  of Lessee,  or any of its  respective  employees,
agents, invitees,  licensees or contractors.  All repairs, and replacements made
by Lessee shall  utilize  materials  and  equipment  which are at least equal in
quality and usefulness to those originally used in the Leased Premises.  Lessee,


                                      -16-
<PAGE>



at Lessee's expense,  shall enter into one (1) or more service contracts for the
maintenance  of the  heating,  ventilating  and  air  conditioning  systems  and
equipment.  Lessee shall keep the Leased Premises free of all insects,  rodents,
vermin and pests of every type and kind. Lessee shall also,  promptly and at its
own expense,  keep any sidewalks and curbs adjacent to the Leased Premises clean
and free from snow,  ice,  dirt and rubbish.  Lessee  shall not  (directly or by
sufferance)  place any equipment,  materials or debris on the roof of the Leased
Premises, or cut, drive nails into or otherwise mutilate such roof.

              (b) Lessor shall within thirty (30) days (or such longer period of
time as may  reasonably be required by Lessor) after written  notice from Lessee
with respect thereto,  make necessary  structural  repairs to the exterior walls
and shall keep in good order,  condition  and repair the  exterior  foundations,
downspouts,  gutters  and roof of the  Leased  Premises  and the  portion of the
plumbing  and sewage  system  located  outside the  building in which the Leased
Premises are located (it being understood and agreed that Landlord's obligations
exclude the exterior and interior of all windows,  doors, plate glass and signs,
and repairs required by any casualty except as otherwise covered by Paragraph 13
herein).  Lessee shall,  upon demand,  reimburse  Lessor for reasonable costs of
making any such repairs or  replacements  caused by Lessee's use or occupancy of
the Leased  Premises  or by any act,  omission  or  negligence  of  Lessee,  any
subtenant or concessionaire of Lessee,  or their respective  employees,  agents,
invitees,  licensees or contractors (excluding repairs or replacements caused by
Lessee's normal use).

              (c) Lessee  hereby  covenants  to contain  all  garbage,  rubbish,
waste,  trash and debris  generated  in  conjunction  with its use of the Leased
Premises in  containers  provided by Lessor (which shall be emptied no more than
three times per week, but at least once a week) so as not to constitute a safety
or fire hazard.

         16.  ALTERATIONS
              -----------

              Lessee  shall not make any  non-structural  interior  alterations,
additions or improvements in or to the Leased Premises without the prior written
consent of Lessor in each  instance,  which  consent  shall not be  unreasonably
withheld  or  delayed.   Lessee  shall  not  take  any  structural  or  exterior
alterations,  additions or improvements to the Leased Premises without the prior
written  consent of Lessor.  Should Lessor fail to respond  within  fifteen (15)
working  days after  Lessor's  receipt of any  written  request  from Lessee for
Lessor's  consent  to  any  proposed  alterations,  additions  or  improvements,
Lessor's   consent  shall  be  deemed  to  have  been  granted.   All  permitted
alterations, additions and improvements made by Lessee shall be performed (i) in
a good and workmanlike  manner, (ii) in accordance with all applicable legal and
insurance  requirements,  (iii) only after receipt by Lessee and presentation to
Lessor of all necessary permits and licenses, and (iv) at Lessee's sole expense.
Except for Lessee's removable trade fixtures, and all improvement made by Tenant
in the processing and storage areas, all improvements,  repairs, alterations and
additions and all other non-trade  fixtures,  whether  installed before or after
the  execution  of this  Lease,  shall  remain  upon the Leased  Premises at the
expiration or sooner termination of this Lease and become the property of Lessor


                                      -17-
<PAGE>



without  payment  therefor by Lessor,  unless prior to the  termination  of this
Lease,  Lessor shall have given written  notice to Lessee to remove the same, in
which event Lessee, at its expense, will remove such alterations,  improvements,
additions  and/or  fixtures  and  repair and  restore  any and all damage to the
Leased Premises caused by the installation and/or removal thereof.

         17.  SIGNS
              -----

              Lessee may not install any sign  without  Lessor's  prior  written
consent.  All signs shall be in strict  compliance  with the sign  criteria  set
forth in Exhibit "C" attached hereto and made part hereof.  Lessee shall install
all exterior signs for the Leased Premises at the cost and expense of Lessee. No
sign, advertisement or notice shall be inscribed,  painted, affixed or otherwise
displayed on any part of the outside or the inside of the Leased Premises or the
building  of which the Leased  Premises  are a part,  unless  Lessor  shall have
approved the sign, advertisement,  or notice in writing prior to installation of
the same. If any sign,  advertisement,  or notice is exhibited by Lessee without
having first obtained Lessor's approval thereof,  Lessor shall have the right to
remove the same and Lessee shall be liable for any and all expenses  incurred by
Lessor in said  removal.  No signs made of paper and visible from outside of the
Leased Premises shall be allowed in the Leased Premises. No mobile sign, such as
may be affixed to the side of a truck or a trailer or a mobile platform shall be
permitted in the parking area.

         18.  LAWS AND INSURANCE STANDARDS
              ----------------------------

              Lessee shall,  at Lessee's sole expense,  promptly comply in every
respect with all  applicable  laws,  ordinances,  rules and  regulations  of all
federal,  state,  county, and municipal  governments now in force or that may be
enacted in the future,  all applicable  and  enforcement  directions,  rules and
regulations of the fire marshall,  health officer,  building  inspector or other
proper  officers  of  any  governmental  agency  having  jurisdiction,  and  the
applicable standards established from time to time by the National Board of Fire
Underwriters,  the National Fire Protective Association,  or any similar bodies.
Lessee expressly covenants and agrees to indemnify and save Lessor harmless from
any  penalties,  damages or charges  imposed for any violation of the foregoing.
Notwithstanding the foregoing,  Lessee shall not be required to make any changes
or modifications to the Leased Premises, unless (a) the same are required due to
Lessee's specific use and/or occupancy of the Leased Premises,  (b) the same are
required due to structural specifications (beyond building standard) required by
Lessee, or (c) the same relate to repairs, maintenance or other responsibilities
of Lessee under this Lease, e.g., Paragraph 15(a) hereof.

         19.  MECHANIC'S LIENS
              ----------------

              Lessee shall do all things  necessary to prevent the filing of any
mechanics' or other liens against the Leased Premises,  or the land the building
of which the Leased  Premises are part,  by reason of work,  labor,  services or


                                      -18-
<PAGE>



materials  supplied or claimed to have been supplied to Lessee or anyone holding
the Leased premises,  through or under Lessee.  If any lien shall at any time be
filed,  Lessee shall either cause the lien to be discharged of record within ten
(10) days after knowledge of its filing or, if Lessee in its discretion and good
faith determines that the lien should be contested,  shall furnish such security
as may be necessary to prevent the filing of any foreclosure  proceedings during
the pendency of the contest.  If Lessee shall fail to discharge  any lien within
such period or fail to furnish  such  security,  then,  in addition to any other
right or remedy,  Lessor may, but shall not be obligated to,  discharge the same
either by paying the amount  claimed to be due or by procuring  the discharge of
lien by deposit in court or by giving  security or in such other manner as is or
may be  prescribed  by law.  Lessee  shall  repay to Lessor  on demand  all sums
disbursed or deposited by Lessor pursuant to the foregoing provisions, including
the  expenses  and  reasonable  attorneys'  fees  incurred  by  Lessor.  Nothing
contained  in this Lease shall imply that  Lessee has any  authority  or consent
from Lessor to subject Lessor's estate to any mechanics', materialman's or other
lien.

         20.  ASSIGNMENT AND SUBLETTING
              -------------------------

              (a) Lessee shall not assign,  mortgage or encumber any interest in
this Lease or sublet all or any part of the Leased  Premises  without  the prior
written consent of Lessor.  Lessor shall not unreasonably  withhold or delay its
consent to an assignment or subletting of this Lease.

              (b) No permitted assignment or subletting shall release, discharge
or affect the  liabilities  of Lessee as provided for in this Lease,  and Lessee
shall at all times remain  primarily  liable under this Lease.  An assignment by
operation of law shall be deemed a prohibited assignment under this Paragraph.

         21.  INSOLVENCY
              ----------

              Lessor may,  at its option,  declare  this Lessee  terminated  and
reenter  and  resume  possession  of the  Leased  Premises,  if Lessee  shall be
adjudicated  a  bankrupt  or  insolvent,  or if a receiver  or trustee  shall be
appointed for Lessee's business or property,  or if Lessee shall file a petition
in bankruptcy or insolvency, or if a petition or other proceeding shall be filed
by or against Lessee seeking corporate or other  reorganization,  liquidation or
other similar relief or if Lessee shall make an assignment or an arrangement for
the benefit of creditors,  or if an involuntary  petition shall be filed against
Lessee in  bankruptcy or  insolvency  and such  petition  shall not be dismissed
within sixty (60) days.

         22.  REMEDIES CUMULATIVE
              -------------------

              The various rights,  elections and remedies of Lessor contained in
this  Lease  shall  be  cumulative,  and no one of them  shall be  construed  as
exclusive of any of the others,  or of any right,  priority or remedy allowed or
provided for by law.


                                      -19-
<PAGE>



         23.  WAIVER OR DEFAULT
              -----------------

              The waiver by either  party of any default in the  performance  by
the other of any covenant shall not be construed to be a waiver of any preceding
or subsequent  default of the same or any other covenant  contained herein.  The
subsequent  acceptance  of Rent or other  sums by  Lessor  shall not be deemed a
waiver of any  preceding  default  other  than the  failure of Lessee to pay the
particular rental or other sum so accepted.

         24.  HOLDING OVER
              ------------

              If Lessee shall hold  possession of the Leased  Premises after the
end of the term or other termination of this Lease, Leases shall be deemed to be
occupying the Leased Premises as a tenant from month to month, subject to all of
the  conditions,  provisions and obligations of this Lease;  provided,  however,
Lessee  shall be liable for any and all  damages  and  expense  that  Lessor may
sustain by virtue of Lessee's holding over,  including,  but not limited to, any
amount for which Lessor may be liable under,  or as a result of, any other lease
entered into by Lessor for a term  beginning at or after the  expiration  of the
term of this Lease.  Nothing  contained  in this Lease shall be  construed  as a
consent by Lessor to the  occupancy  or  possession  of the Leased  Premises  by
Lessee after the expiration of the term of this Lease. Rather, at the end of the
term of the  Lease,  Lessor  shall be  entitled  to the  benefit  of all laws or
ordinances  relating to the recovery of the  possession  of lands and  tenements
held over by tenants that now may be in force or hereafter  may be enacted,  and
Lessor may proceed under such laws or ordinances,  without notice to Lessee, all
statutory notice requirements being expressly waived by Lessee.

         25.  SURRENDER
              ---------

              Upon the expiration of the term of this Lease,  Lessee immediately
shall surrender the Leased Premises broom-clean and in good order and condition,
ordinary wear and tear excepted.  All of Lessee's  personal property at or about
the Leased Premises (but not permanently  affixed parts of the Leased  Premises)
shall be removed by Lessee at or before the expiration of this Lease or shall be
deemed  abandoned by Lessee.  Any damage to the Leased  Premises  caused by such
removal shall be repaired by Lessee at its own expense.

         26.  DEFAULT
              -------

              (a) If Lessee  fails to pay any Rent or  Additional  Rent when due
and such failure continues for a period of five (5) days after Lessor shall have
made written demand on Lessee for payment, or if Lessee otherwise is at any time
in default under this Lease and continues in such default for a period of thirty
(30) days after  Lessor  shall  have  demanded  in  writing to Lessee  that such
default be cured, or if such latter default is not capable of being cured within


                                      -20-
<PAGE>



a fifteen (15) day period,  such additional time (not to exceed  forty-five (45)
days) as is reasonably necessary to cure such default,  provided Lessee promptly
commences  and  diligently  pursues to cure such  default,  then  Lessor may, at
Lessor's  option,  terminate this Lease (without  releasing Lessee of liability)
and by summary  proceedings or other manner  prescribed by law, reenter and take
possession of the Leased  Premises.  If Lessor  should so terminate  this Lease,
Lessee  shall pay to Lessor as damages,  upon demand,  all expenses  (including,
without limitation,  attorneys' fees) of any proceedings  necessary in order for
Lessor  to  recover  possession  of the  Leased  Premises  and the  expenses  of
reletting  the  Leased  Premises  (including,  without  limitation,   reasonable
attorneys'  fees,  brokerage  commissions,  and the costs of putting  the Leaded
Premises in good order and preparing it for reletting, plus either:

                   (i)   Liquidated damages in an amount equal to the excess, if
any,  of the Rent and  Additional  Rent that  would have been  payable  over the
unexpired  portion of the term of this Lease over the rental value of the Leased
Premises for such unexpired  portion of the term of this Lease, as discounted at
the  then  publicly  declared  prime  rate of the  Federal  Bank  in  Baltimore,
Maryland; or

                   (ii)  Damages  in an amount  to the  excess,  if any,  of the
monthly  Rent and  Additional  Rent over the  monthly  rentals,  if any, if fact
collected by Lessor as the result of a reletting of the Leased  Premises at such
rent and upon such terms as Lessor,  in its sole  discretion,  elects to accept.
Separate  actions may be maintained  each month by Lessor to recover the damages
then due as provided for in this subparagraph (ii) and any such action shall not
prejudice the rights of Lessor to collect damages for any subsequent  month in a
similar proceeding.

              (b)  No re-entry or reletting of the Leased  Premises,  whether or
not the term of such reletting  extends beyond the term of this Lease,  shall be
construed  as an  election  by Lessor to: (i) accept a  surrender  of the Leased
Premises, or (ii) release Lessee of any of its obligations under this Lease.

              (c)  Should Lessor,  pursuant to its rights under  Paragraph 26(a)
hereof,  elect to terminate  this Lease and reenter and take  possession  of the
Leased Premises,  Lessor shall use commercially  reasonable efforts,  under then
prevailing circumstances, to relet the Leased Premises.

         27.  ACCESS TO LEASED PREMISES
              -------------------------

              (a)  Lessor and its  designees  shall have the right  (subject  to
being accompanied by Lessee's  representative at all times for security reasons)
to enter  upon the  Leased  Premises  at all  reasonable  hours,  after 24 hours
notice,  (and in  emergencies,  at all times):  (i) to inspect the same; (ii) to
make repairs,  additions,  or alterations to the Leased Premises or the building
in which the same are located or any property  owned or  controlled by Landlord;
(iii) to  exhibit  the  Leased  Premises  to any  prospective  buyer,  lessee or
mortgagee or their respective agents or representatives; and (iv) for any lawful
purpose.


                                      -21-
<PAGE>



              (b)  For a period  commencing three (3) months prior to the end of
the term,  Lessor may have reasonable  access to the Premises for the purpose of
exhibiting  the same to  prospective  tenants and to post any "For Rent" or "For
Lease" signs upon the Leased Premises.

         28.  SUBORDINATION AND ATTORNMENT
              ----------------------------

              (a)  This  Lease is  subject  and  subordinate  to the lien of all
present  and  future  mortgages  and/or  deeds of trust  encumbering  the Leased
Premises,  all present and future advances under such mortgages  and/or deeds of
trust, and all renewals, extensions,  modifications,  recastings or refinancings
of such  mortgages  and/or deeds of trust.  Lessee agrees that, in the event any
proceedings are brought under or for the foreclosure of any such mortgage and/or
deed of trust,  Lessee shall, if requested to do so by the beneficiary  under or
holder of such mortgage  and/or deed of trust or by any successor in interest to
such beneficiary or holder, automatically become the lessee of such beneficiary,
holder  or  successor  in  interest  and  shall  automatically  attorn  to  such
beneficiary, holder and/or successor in interest and recognize such beneficiary,
holder  and/or  successor  in  interest  as the  Lessor  under  this  Lease.  In
confirmation of such attornment, however, Lessee shall, at the request of Lessor
or any  beneficiary,  holder or  successor  in  interest,  promptly  execute any
requisite or  appropriate  certificate or other document for the benefit of such
beneficiary, holder and/or successor in interest.

              (b)  In the event that,  after the date of this Lease, a bona fide
loan shall be made by an insurance company, savings bank, commercial bank, trust
company, or other lender and secured by a mortgage or deed of trust constituting
a lien  against  any  portion  of the  Leased  Premises  and said  lender  shall
complete,   execute   and   acknowledge   a   subordination,   attornment,   and
non-disturbance agreement, then and in that event, Lessee shall subordinate this
Lease to said mortgage or deed of trust by executing and  acknowledging the said
subordination, attornment and non-disturbance agreement.

              (c)  Upon any assignment or  termination  of Lessor's  interest in
the Leased Premises,  Lessee shall,  upon request,  attorn in writing to the new
owner of the Leased  Premises and shall pay to the new owner all rents and other
monies  required to be paid and perform all of the other  obligations  of Lessee
under this  Lease.  Following  any sale by Lessor of the  property  of which the
Leased  Premises are a part, all  obligations to the assigning  Lessor to Lessee
shall cease and  termination  and Lessee shall look solely to the  successor for
the performance of Lessor's duties hereunder.

              (d)  Notwithstanding  the  foregoing,  this  Lease  shall  not  be
terminated so long as Lessee is not in default of any provisions in this Lease.

              (e)  Lessor shall,  within fifteen (15) days after the date hereof
(or prior to the effective date of any encumbrance  mentioned in this Section 28
created after the date hereof)  obtain from the holder of any such  encumbrance,



                                      -22-
<PAGE>



an agreement whereby if such holder or any successor in interest shall come into
possession  of the  Leased  Premises,  or any part  thereof,  by  dispossession,
foreclosure or otherwise,  or shall become the owner of such  property,  or take
over the rights of Lessor to such  property,  said holder  shall not disturb the
possession, use or enjoyment of the Leased Premises by Lessee, its successors or
assigns,  nor  disaffirm  this  Lease  or  Lessee's  rights  or  estate  granted
hereunder,  so long as Lessee performs all of its obligations in accordance with
the terms of this Lease.

         29.  RIGHT TO CURE DEFAULTS
              ----------------------

              (a)  If  Lessee  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then, in addition to Lessor's other rights,  but
not the  duty,  to cure  such  breach  at  Lessee's  expense.  Lessee  agrees to
reimburse  Lessor,  within fifteen (15) days after Lessor submits a statement of
the amount due, as  Additional  Rent,  for all expenses  incurred by Lessor as a
result of any efforts made by Lessor to cure any such breach.

              (b)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then,  in addition to Lessee's  other rights and
remedies under this Lease at law and in equity, Lessee shall have the right, but
not the duty,  to cure such breach at Lessor's  expense;  provided that prior to
the  exercise of such right to cure,  Lessee  shall give Lessor  written  notice
specifying  the nature of the breach and Lessor  shall be  entitled  to ten (10)
days  after  receipt of such  notice  within  which to cure said  breach or such
additional  time as may be necessary if such breach is not  susceptible  to cure
within said ten (10) days,  in which case Lessor  shall  commence to cure within
said ten (10) day period. Lessor agrees to reimburse Lessee, within fifteen (15)
days after  Lessee  submits a  statement  of the amount  due,  for all  expenses
incurred by Lessee as a result of any efforts by Lessee to cure any such breach.
If Lessor fails to reimburse  Lessee as aforesaid,  Lessee may offset the amount
due against the  payments of Rent  becoming  due  hereunder  unless  Lessor give
written  notice of dispute  within said  fifteen  (15) day period  either to the
existence of any default or the  reasonableness  of the amount expended to cure.
In the event such notice of dispute is given, the provisions of subparagraph (c)
shall govern. The right to setoff against Rent shall be subordinate to and there
shall be no setoff  against the holder of any  mortgages or deed of trust or any
purchaser  at  foreclosure  or deed in lieu thereof on all or any portion of the
Leased  Premises.  The amount of all setoffs shall be limited to the  cumulative
sum of One  Hundred  Thousand  Dollars  ($100,000.00).  

              (c)  If  Lessor  has  given  notice  of  dispute  as  provided  in
subparagraph (b), Lessee may have the issues of whether the Lessor is in default
of  its  obligations  or  the  reasonableness  of  the  amount  of  expenditures
determined by arbitration.  Pending the results of such arbitration, there shall
be no setoff. In the event the arbitrators determine that Lessor was in default,
Lessor  shall pay all costs of  arbitration  and Lessee  shall have the right to
offset  all of its costs and  expenses  of  remedying  such  default  (including
unreimbursed costs of the arbitration  proceeding)  against the payments of Rent
becoming due hereunder, subject to the limitations set forth in subparagraph (b)
above. If the arbitrators  determine that Lessor was not in default, then Lessee
will pay all of the arbitration.


                                      -23-
<PAGE>



              (d)  If Lessor is determined  to be in default in its  obligations
under  Paragraph  15(c) of this Lease and Lessee  shall  remedy such  default in
accordance with the preceding paragraph,  Lessee shall be entitled to offset one
hundred  fifteen  percent  (115%) of the costs and  expenses of  remedying  such
default, with the additional fifteen percent (15%) being to reimburse Lessee for
its overhead.

         30.  BROKERAGE
              ---------

              Lessor  hereby  acknowledges  that  THE  MICHAEL  COMPANIES,  INC.
("Broker") has served as Lessor's agent in connection with this Lease and agrees
to pay said Broker a commission as per a separate  agreement  between Lessor and
Broker.  Lessor warrants to Lessee and Lessee warrants to Lessor that it has not
dealt with any other  broker or real estate agent or finder in  connection  with
this Lease and that, except for the aforesaid  commission  payable to Broker, no
right or claim for  commission  or other  compensation  has been  created by its
actions with respect to this Lease.  Lessor and Lessee shall  indemnify and hold
each other harmless against all loss, liability or expense, including reasonable
attorney's fees and litigation costs, incurred by the other to the extent one or
the other is shown to be in breach of the foregoing warranties.

         31.  EFFECT OF CONVEYANCE
              --------------------

              If during the term of this Lease  Lessor sells its interest in the
Leased  Premises or this Lease,  then from and after the effective  date of such
sale,  Lessor  shall  be  released  and  discharged  from  any and  all  further
obligations and responsibilities  under this Lease except those already accrued.
Any such sale  shall be  subject to this  Lease and  Lessor  shall  require  any
purchaser to acknowledge the existence of Lessee's tenancy.

         32.  INTERPRETATION
              --------------

              The captions by which the  paragraphs of this Lease are identified
are for  convenience  only and shall have no effect upon the  interpretation  of
this Lease. Whenever the context so requires,  the singular number shall include
the plural,  and plural shall refer to the singular and the neuter  gender shall
include the masculine and feminine genders. If any provision of this Lease shall
be held to be unenforceable by a court, the remaining provisions shall remain in
effect and shall in no way be impaired.

         33.  ENTIRE INSTRUMENT
              -----------------

              All of the agreements previously and contemporaneously made by the
parties are  contained  in this Lease,  and this Lease cannot be modified in any
respect except by a writing executed by Lessor and Lessee.


                                      -24-
<PAGE>



         34.  ESTOPPEL CERTIFICATES
              ---------------------

              Recognizing  that both  parties may find it necessary to establish
to third parties, such as accountants,  banks,  mortgagees or the like, the then
current status of performance hereunder, either party, on the written request of
one to the  other  made  from  time to time,  will  promptly  furnish  a written
certificate  on the status of any matter  pertaining  to this Lease in such form
and substances as may from time to time be reasonably required.

         35.  NOTICES
              -------

              Any notices and other  communications  required or permitted to be
given by either  party to the other  shall be in writing  and shall be deemed to
have been served when hand  delivered  or, if the United States Mail is used, on
the second business day after the notice is deposited in the United States Mail,
postage prepaid, registered or certified mail, or by overnight delivery service,
and addressed to the parties as follows:

         To Lessee:             Jacques R. Rubin
                                President
                                Bio Science Contract Product Corp.
                                4406 Bel Pre Road
                                Rockville, Maryland  20853

         To Lessor:             Muirkirk Manor Associates Limited Partnership
                                c/o The Anastasi Stephens Group, Inc.
                                4483 Forbes Boulevard
                                Lanham, Maryland   20706

Either party,  by written  notice to the other,  may change its address to which
notices are to be sent.

         36.  WAIVER
              ------

              Any waiver of either  Lessor or Lessee of any  default,  breach or
failure by the other to comply with any term,  condition,  or  provision of this
Lease shall not constitute a waiver of any other  default,  breach or failure by
such  defaulting  party.  No covenant,  term or condition of this Lease shall be
deemed to have been waived by either  party unless such waiver be in writing and
signed by the party to be charged therewith.

         37.  QUIET ENJOYMENT
              ---------------

              So  long as  Lessee  is not in  default  beyond  applicable  grace
periods,  Lessee shall have peaceful and quiet use and  possession of the Leased
Premises  without  hindrance  on the part of Lessor or any person  claiming  by,
through or under Lessor.


                                      -25-
<PAGE>



         38.  RECORDING THIS LEASE
              --------------------

              Lessee may not record  either this Lease nor a memorandum  thereof
among or in any public records without Lessor's prior written consent.

         39.  GOVERNING LAW
              -------------

              All questions with respect to  construction  of this Lease and the
rights and liabilities of the parties shall be determined in accordance with the
laws of the State of Maryland.

         40.  BENEFIT
              -------

              Subject to the restrictions on assignment and subletting set forth
in Paragraph 20, the  covenants,  terms and conditions of this Lease shall inure
to the  benefit of and be binding  upon  Lessor and Lessee and their  respective
successors and assigns.

         41.  REASONABLE CONSENT
              ------------------

              Wherever in this Lease  Lessor or Lessee is required to obtain the
consent or  approval of the other,  it is agreed  that such  consent or approval
shall not be unreasonably withheld or delayed.

         42.  TIME OF ESSENCE
              ---------------

              Time is of the  essence  in the  performance  of all of Lessor and
Lessee's obligations under this Lease.

                  (See Lease Addendum for Paragraphs 43 and 44)



                                      -26-
<PAGE>



              IN WITNESS  WHEREOF,  the parties have  executed this Lease on the
day and year first above written.


WITNESS:                                 LESSOR:

                                         MUIRKIRK MANOR ASSOCIATES
                                         LIMITED PARTNERSHIP,
                                         a Maryland limited partnership

                                         By: THE ANASTASI STEPHENS GROUP, INC.
                                               its general partner


 /s/ Richelle J. Darnell                      By:   /s/ Joseph Anastasi   (Seal)
- -------------------------                           ----------------------------


WITNESS:                                 LESSEE:

                                         BIO SCIENCE CONTRACT PRODUCTION CORP.
                                         a Maryland corporation


 /s/ Richelle J. Darnell                      By: /s/ Jacques R. Rubin
- ------------------------                          ---------------------


                                      -27-
<PAGE>




                              EXHIBIT "A" (PART II)

                                 LEASE ADDENDUM
                                 --------------

                                  (PARK PLACE)


         THIS  LEASE  ADDENDUM  made as of the 28th day of  December,  1990,  is
attached  to and made  part of that  certain  Lease of even date  herewith  (the
"Lease")  by and  between  MUIRKIRK  MANOR  ASSOCIATES  LIMITED  PARTNERSHIP,  a
Maryland limited partnership  ("Lessor"),  and BIO SCIENCE CONTRACT  PRODUCTDION
CORP., a Maryland corporation ("Lessee").

                              W I T N E S S E T H:
                              - - - - - - - - - -

         WHEREAS,  LESSOR and LESSEE  have  agreed to amend,  supplement  and/or
modify the Lease as herein provided, Lessor and Lessee hereby agree as follows:

         2.   TERM - OPTION
              -------------

              Lessee, at its option,  shall have the right to extend the Term of
this Lease on the same terms and conditions as the original term thereof, except
as otherwise  provided in this  Addendum with respect to the amount of Base Rent
during the respective extension period, for two (2) additional consecutive terms
of five (5) years each (the "Extension  Periods") subject to the satisfaction of
the following conditions:

              (i)    Lessee's  option  to  extend  the  Lease  for  each  of the
Extension Periods shall be exercisable only by written notice to Leasor at least
ninety (90) days prior to the  commencement  date of each Extension  Period.  If
Lessee does not give Lessor written notice as aforesaid,  Lessee shall be deemed
to have not exercised its respective extension option.

              (ii)   At  the  time  of   exercise  of  the  option  and  at  the
commencement of each Extension Period,  Lessee shall not be in default under the
Lease beyond any applicable grace period.

              (iii)  Upon  exercising  the  option,  the Base  Rent  will be the
product  obtained by  multiplying  the Base Rent for the  immediately  preceding
Lease Year by one hundred four percent (104%).

         3.   RENT
              ----

              For  months  1,  2,  3 and 4 of  the  first  base  year,  Lessee's
obligation  to pay 1/2 of the monthly base rent is hereby  waived.  It is agreed
that Common  Area  Maintenance  charges and  Additional  Rent,  if any,  will be
collected on the first day of occupancy, pursuant to Paragraph 8.(c).


                                      -28-
<PAGE>



         43.  LESSEE IMPROVEMENTS
              -------------------

              (d)  The  term  "force  majeure"  as used  herein  shall  include,
without  limitation,  the  following:  acts of God,  strikes,  lockouts or other
industrial  disturbances;  acts of  public  enemies;  orders  of any kind of the
government of the United States or of the State in which the Leased Premises are
located or of any subdivision  thereof or any local government,  or any of their
departments,  agencies  or  officials,  or  any  civil  or  military  authority;
insurrections;  riots;  epidemics;  landslides;  lightning;  earthquakes;  fire;
hurricanes; storms; floods; washouts; droughts; arrests; restraint of government
and people; civil disturbances;  explosions;  breakage or accident to machinery,
transmission  pipes or canals;  partial or entire  failure of utilities;  or any
other cause or event not reasonably within the control of the Lessee.

              (e)  Tenant  requires  that  certain  improvements  be made to the
Leased  Premises  for its use.  The parties have agreed on the scope of the work
(the "Work") to be done and have  approved  construction  drawings for the work.
The  Work  is to be  done  under  a  construction  contract  (the  "Construction
Contract") between Landlord and Barber Construction Corporation  ("Contractor").
The  Construction  Contract has been  approved by Landlord and Tenant.  Landlord
will be  responsible  for the  supervision  and timely  completion  of the work,
regardless of the performance of the Contractor.

                   The Work is to be completed no later than March 1, 1991 for a
contract  price of  $231,148.70  of which  Landlord will pay $200,000 and Tenant
will pay  $31,148.70,  provided  that the  amount to be paid by  Tenant  will be
reduced by any amount that the contract  price is reduced for any reason.  Prior
to commencement  of the Work as provided in the  Construction  Contract,  Tenant
will pay its  contribution  of  $31,138.70  in  escrow  with C.  Lawrence  Wisor
("Escrow  Agent"),  as  escrow  agent,  to be paid by the  Escrow  Agent  to the
Contractor as the terms of the Construction  Contract provide after the Landlord
has paid all of its $200,000 contribution, less retainage, to the Contractor.

                   Any changes to the approved  construction  drawings  shall be
signed or  initialed  by  Landlord  and  Tenant and  change  orders  made to the
Construction  Contract.  Tenant  agrees to pay to the Escrow  Agent the contract
price for any change orders at the time such change  orders are signed.  Payment
is to be made by the Escrow Agent to the Contractor  upon submission of invoices
approved by the Landlord.  Tenant shall be responsible to Landlord for any delay
in completion of the work as a result of such changes.  Neither the commencement
date of the Lease nor the commencement of rents due shall be deferred because of
any such  changes  but will be  deferred  if the  Work is not  completed  by the
completion  date given  above for any  reason  other than the effect of any such
change order.


                                      -29-
<PAGE>



         44.  GROUND LEASE
              ------------ 

              Lessor has leasehold ownership of the project known as Park Place,
of which the Leased  Premises  are a part,  under a long-term  ground lease (the
"Ground  Lease"),  the term of which  exceeds  the  initial  term and  extension
periods of this Lease.  Lessor represents that the Ground Lease is in full force
and effect and that there are no defaults thereunder. Lessor further agrees that
so long as this Lease in effect,  it will timely perform all of its  obligations
under the Ground Lease.

              Lessor  shall,  within  fifteen  (15) days  after the date  hereof
obtain  from the  Lessor  (the  "Ground  Lessor")  under the  Ground  Lease,  an
agreement  whereby if the Ground Lessor  terminates the Ground Lease, the Ground
Lessor shall not disturb the possession, use or enjoyment of the Leased Premises
by Lessee,  its  successors  or assigns,  nor  disaffirm  this Lease or Lessee's
rights or  estate  granted  hereunder,  so long as  Lessee  performs  all of its
obligations in accordance with the terms of this Lease.

         IN WITNESS  WHEREOF,  the parties have executed this Lease  Addendum on
the day and year first above written.


ATTEST:                              LESSOR:

                                     MUIRKIRK MANOR ASSOCIATES
                                     LIMITED PARTNERSHIP,
                                     a Maryland limited partnership

                                     By: THE ANASTASI STEPHENS GROUP, INC.
                                            its general partner


/s/ Richelle J. Darnell                  By: /s/ Joseph Anastasi         (Seal)
- -------------------------                    ----------------------------------


                                     LESSEE:

                                     BIO SCIENCE CONTRACT PRODUCTION CORP.
                                     a Maryland corporation


/s/ Richelle J. Darnell                  By: /s/ Jacques R. Rubin
- -------------------------                    ---------------------


                                      -30-
<PAGE>




                                   EXHIBIT "B"

                                  SECOND LEASE
                                  ------------


                                      LEASE
                                      -----

                                  (PARK PLACE)


         THIS LEASE, made as of this 12th day of November,  1991, by and between
MUIRKIRK MANOR ASSOCIATES LIMITED  PARTNERSHIP,  a Maryland Limited  partnership
("Lessor"),  and BIO SCIENCE CONTRACT PRODUCTION CORP., a Maryland  corporation,
("Lessee").

                              W I T N E S S E T H:
                              - - - - - - - - - -

         That in  consideration  of the rent and mutual covenants and agreements
contained  herein,  and intending to be legally bound hereby,  Lessor and Lessee
agree as follows:


         1.   DEMISED PREMISES
              ----------------

              The  Lessor  leases  to the  Lessee  all  of  that  certain  space
described  as  Suite  No.  270,  280,  9000  Virginia  Manor  Road,   containing
approximately  12,731 square feet of gross  leasable area, as is outlined in red
on the piat  attached  to and  made a part of this  Lease  as  Exhibit  "A" (the
"Leased Premises"), and located in Park Place, Prince George's County, Maryland.
Lessor shall  construct and complete the Leased  Premises in compliance with the
plans and  specifications set forth in Exhibit "B" attached hereto and made part
hereof. "Delivery of Possession" of the Lease Premises by Lessor to Lessee shall
be deemed to have been made when  Lessor's  architect  certifies in writing that
construction of the Leased Premises shall have been completed.

         2.   TERM
              ----

              The term (the  "Term") of this  Lease  shall be for a term of nine
(9) years, and two (2) months,  commencing on the 1st day of January, 1992, (the
"Commencement Date") and shall expire on the last day of February,  2001. If the
Term of the Lease does not begin on the date specified  herein for reasons other
than the  fault of  Lessee,  then the  expiration  date  shall be moved  for the
commensurate amount of the delay and the rent shall be prorated accordingly.  If
the term  commences  or ends in  mid-month,  the  rent  payable  for that  month
(including,  without limitation,  Additional Rent) shall be prorated and paid on
the date of commencement or termination.


                                      -31-
<PAGE>



        3.    RENT
              ----

              (a)  The rent (the "Base Rent") shall be:

                 Year                      Square Foot Rate
                 ----                      -----------------

                   1                            $ 9.06
                   2                            $ 9.39
                   3                            $ 9.77
                   4                           $ 10.16
                   5                           $ 10.57
                   6                           $ 10.99
                   7                           $ 11.43
                   8                           $ 11.89
                   9                           $ 12.36

The term "Lease Year" shall mean each twelve (12) month  period  during the term
of this  Lease  commencing  on the  Commencement  Date.  The Base Rent  shall be
payable,  in  advance,  in  equal  monthly   installments,   the  first  monthly
installment to be due and payable on the  Commencement  Date and each subsequent
monthly  installment  to be due and  payable  on the first day of each and every
month thereafter during the term of this Lease.

              (b)  All moneys  payable by Lessee  under the terms of this Lease,
other than Base Rent, as adjusted from time to time, shall be deemed "Additional
Rent."

              (c)  Lessee  shall make all  payments of Base Rent and  Additional
Rent on a  timely  basis,  without  demand  and  without  deduction,  setoff  or
counterclaim,  except as  expressly  permitted in Paragraph  29(b)  hereof.  All
payments  of Rent and  Additional  Rent  shall be made by good and valid  check,
payable to The Anastasi  Stephens Group,  Inc.,  agent,  4483 Forbes  Boulevard,
Lanham,  Maryland  20706,  or to such other  party or to such  other  address as
Lessor may designate  from time to time by written  notice to Lessee.  If Lessor
shall at any time or times  accept Base Rent or  Additional  Rent after it shall
become due and payable,  such acceptance  shall not excuse delay upon subsequent
occasions, or constitute,  or be construed as, a waive of any or all of Lessor's
rights  hereunder.  If any payment of Base Rent or  Additional  Rent is not made
within  ten (10) days of when due,  a late  charge of five  percent  (5%) of the
amount of such payment shall be imposed, Lessor shall be entitled to require the
payment of Base Rent and Additional Rent by certified check if the check for any
payment by Lessee shall be dishonored by its Bank.

              (d)  Except  for the  obligations  of Lessor  expressly  set forth
herein,  this  Lease is a "net  lease" and Lessor  shall  receive  the Base Rent
hereinabove  provided as net income from the Leased Premises,  not diminished by
any  imposition  of any expenses or charges  required to be paid to maintain and
carry the Leased  Premises or to continue the  ownership  of Lessor,  other than
payments  under any mortgages now existing or hereafter  created by Lessor,  and
Lessor is not and shall not be  required  to render any  services of any kind to
Lessee.


                                      -32-
<PAGE>



         4.   SECURITY DEPOSIT
              ----------------

              (a)  Lessee has,  simultaneously with the execution of this Lease,
deposited  with Lessor,  in cash or by check subject to  collection,  the sum of
eight  thousand and 00/100  ($8,000.00).  Said deposit shall be held as security
for the faithful performance by Lessee of the terms,  covenants,  provisions and
conditions  of this  Lease.  It is agreed that in the event  Lessee  defaults in
respect to any of the terms, covenants, provisions and conditions of this Lease,
including (but not limited to) the payment of Base Rent or Additional  Rent, and
fails to cure any such defaults within applicable grace periods, Lessor may use,
apply or  appropriate  the whole or any part of the security so deposited to the
extent  required for the payment of any Base Rent or Additional  Rent or for the
curing of any  defaults by Lessee  hereunder  pursuant to  Paragraph  29 hereof;
provided,  however,  that no such  use,  application,  or  appropriation  of the
deposit shall be deemed to relieve  Lessee of any breach of this Lease and shall
be in addition to other remedies under this Lease.

              (b)  Should  the  entire   deposit  or  any  portion   thereof  be
appropriated and applied by Lessor under the foregoing  provisions,  then Lessee
shall (upon the written demand of Lessor) forthwith remit to Lessor a sufficient
amount in cash to restore  said  security to the  original  sum  deposited,  and
Lessee's  failure  to do so within ten (10) days  after  receipt of such  demand
shall itself constitute an event of default under this Lease.

              (c)  The security deposit (less any amounts applied as provided in
subsection  (a) above) shall be returned to Lessee within thirty (30) days after
the date  fixed as the end of the Term of this  Lease  and  delivery  of  entire
possession of the Leased Premises to Lessor.

              (d)  In the event of a sale, leasing or other transfer of the land
and building of which the Leased  Premises  forms a part,  Lessor shall have the
right to transfer the security and be released by Lessee from all  liability for
the return of such security deposit.  Lessee shall look to the new Lessor solely
for the return of said  deposit.  The  provisions of this  Paragraph  4(d) shall
apply to every  transfer or  assignment  made of the  security  deposit to a new
Lessor.

              (e)  Lessee  covenants  that it will not  assign  or  encumber  or
attempt to assign to encumber  the  security  deposited  herein and that neither
Lessor  nor its  successors  or assigns  shall be bound by any such  assignment,
encumbrance, attempted assignment or attempted encumbrance.

              (f)  Lessee  shall not be entitled to any interest on the security
deposit, and such funds need not be segregated or held as escrow by Lessor.


                                      -33-
<PAGE>


              (g)  It is expressly  understood  and agreed that, in the event of
any  termination  of this  Lease or  re-entry  upon or  reletting  of the Leased
Premises on account of any default on the part of Lessee under this Lease, then,
and in such event, the deposit shall be retained and be subject to appropriation
by Lessor  until this  Lease  would,  by its terms,  have  expired  absent  such
default.

         5.   USE
              ---

              Lessee  will use and  occupy the  Leased  Premises  solely for the
purpose of Offices and operation of a vaccine research and production  facility,
The Leased  Premises  may not be used for any other  purpose  without  the prior
written consent of Lessor, which consent shall not be unreasonably withheld. The
Leased  Premises shall not be used for the storage,  distribution or sale of any
pornographic  or  "adult  rated"  materials.  Lessee  shall  not use the  Leased
Premises for any purpose or activity which is noxious or unreasonably  offensive
because of the emission of noise, smoke, dust,  vibration or odors. Tenant shall
not use the plumbing  facilities for any purpose injurious to same or dispose of
any  garbage or any other  foreign  substance  therein,  nor place a load on any
floor in the Leased  Premises  exceeding  the floor load of 250 per square  foot
which such floor was designed to carry, nor install,  operate and/or maintain in
the Leased  Premises and heavy  equipment  which could cause injury to the Lease
Premises,  nor  install,  operate  and/or  maintain in the Leased  Premises  any
electrical  equipment which will overload the electrical system therein,  or any
part hereof,  beyond its capacity for proper and safe operation as determined by
the Lessor or which does not bear underwriter's  approval.  Lessee shall not use
the Leased  Premises in any manner or for any purpose  which  violates any rule,
regulation, law, ordinance, or requirements of any governmental agency.

         6.   TAXES
              -----

              (a)  As  additional  rent  hereunder,  at least  thirty  (30) days
before  any fine,  penalty  or  interest  or cost may be added  thereto  for the
non-payment  thereof (or sooner if elsewhere herein required),  Lessee shall pay
throughout  the term of this Lease all  levies,  taxes,  assessments,  water and
sewer  rents and  charges,  liens,  charges for public  utilities  and all other
charges,  imposts  or burdens of  whatsoever  kind and nature  which at any time
during the term of this Lease may be assessed or imposed by any  federal,  state
or  municipal  government  or  public  authority,  or under  any law,  ordinance
regulation  thereof or pursuant to any recorded  covenants or agreements (all of
which are hereinafter referred to as "Impositions"), upon or with respect to the
Leased Premises,  any improvements  made thereto,  or this Lease.  Additionally,
Lessee shall pay a  proportionate  share of any Imposition  which is not imposed
upon the Leased Premises as a separate entity but which is imposed upon the land
or the  building  or upon the  appurtenances,  leases,  rents,  transactions  or
documents  relating  to the lot or the  building.  Provided,  however,  that any
Imposition  shall be apportioned for the first and last fiscal tax years covered
by the term hereof.  "Impositions" shall include, but not be limited to, any and
all governmental or  quasi-governmental  levies,  fees,  assessments,  taxes and
charges,  general  and  special,   ordinary  and  extraordinary,   foreseen  and
unforeseen,  of any kind and nature  whatsoever,  with  respect to such land and
building  (excluding  taxes paid on Lessor's  income but including  sales tax or
excise tax imposed by any  governmental  authority upon the Base Rent payable by
Lessee hereunder).


                                      -34-
<PAGE>



              (b)  Notwithstanding  the foregoing  provisions of this Article 6,
Lessor shall have the right,  at its option,  to require Lessee to pay to Lessor
or to any  mortgagee,  at the time when the monthly  installment of Base Rent is
payable,  an amount equal to  one-twelfth  (1/12) of the annual  Impositions  as
estimated by Lessor. If Lessor elects to have Lessee make such payments,  Lessee
also  shall  pay to Lessor  or to such  mortgagee,  as the case may be, at least
thirty (30) days before any fine, penalty, interest or cost may be added thereto
for the non-payment  thereof,  the amount by which the Impositions  becoming due
exceed the monthly  installment  payments on account thereof  previously made by
Lessee.  Should  Lessee's  monthly  installment  payments on account of Lessee's
share of Impositions for any tax year exceed the actual amount of Lessee's share
of such  Impositions,  the excess  amount  shall be  credited  against  Lessee's
installments for Impositions thereafter becoming due. The amounts paid by Lessee
pursuant to this  paragraph (b) shall be used to pay the  Impositions,  but such
amounts  shall not be deemed to be trust funds and no interest  shall be payable
thereon.

              (c)  During any part of the Term of this Lease which shall be less
than a full tax  fiscal  year,  any Taxes  shall be pro  rated on a daily  basis
between  the  parties,  to the end that Lessee only shall pay its share of Taxes
attributable to the portion of the tax fiscal years occurring within the term of
this Lease.

              (d)  Lessee shall pay  promptly,  and when due,  all taxes,  fees,
licenses,  assessments  and other charges levied or imposed upon the business of
the  Tenant  or upon  any  fixtures,  furnishings  or  equipment  in the  Leased
Premises.

              (e)  If due to a future change in the method of taxation or in the
taxing authority,  a franchise,  gross receipts,  transit,  rent or other tax or
other  governmental  imposition,  however  designated,  shall be levied  against
Lessor in  substitution  (in whole or in part)  for,  or in  addition  to,  said
"Impositions"  as  currently  defined),  then such  franchise,  gross  receipts,
transit,  rent or other tax or  governmental  impositions  shall be deemed to be
included within the definition of "Impositions"  for the purposes of this Lease.
The term  "Impositions"  also  includes  all costs  reasonably  incurred  in any
proceeding brought by Lessor to reduce said Taxes.


              (f)  Lessor may  institute  any  proceedings  with  respect to the
assessed valuation of Park Place or any part thereof, and Lessee shall cooperate
with, and participate in, any and all such  proceedings.  If, after Lessee shall
have made the required payment of Taxes hereunder, Lessor shall receive a refund
of any portion thereof,  then, within thirty (30) days after Lessor's receipt of
such refund, Lessor shall pay to Lessee Lessee's pro rata share of the amount of
the  refund,  less all  costs  and  expenses  (including,  but not  limited  to,
attorneys' and appraiser'  fees) expended for incurred in obtaining such refund.
Lessee may not institute any proceedings with respect to the assessed  valuation
of Park Place or any part thereof.


                                      -35-
<PAGE>



         7.   UTILITIES
              ---------

              Starting with the Commencement Date and continuing  throughout the
Term of the Lease,  Lessee shall be solely responsible for and shall pay, as and
when the same  become due and payable and as  hereinafter  provided,  all rents,
rates, costs and charges for water services,  sewer service,  electricity,  gas,
heat, steam, power, telephone (and other communication  services), and any other
utilities or services  rendered or supplied to, upon or in  connection  with, or
used or consumed  within or in  servicing,  the Leased  Premises,  and all other
utility costs and expenses involved in the use of the Leased Premises throughout
the term of this  Lease,  and Lessee  shall  indemnify  Lessor  and save  Lessor
harmless  against  any  costs  liability  or  damages  on such  account.  Unless
otherwise  agreed in writing by Lessor or Lessee,  Lessee  shall,  promptly upon
Delivery of Possession of the Leased  Premises and at Lessee's own expense,  pay
for the  installation of separate meters for all utilities  servicing the Leased
Premises  and place said meters and  related  utility  accounts in Lessee's  own
name.  Lessee shall pay all separately  metered charges to the respective public
utility companies.  With respect to each utility which is not separately metered
for the Leased Premises,  Lessee shall pay Lessor, as Additional Rent,  Lessee's
proportionate  share of the total cost and fees therefore  attributable to those
areas of the warehouse/office buildings which are not separately metered.

         8.   COMMON AREA MAINTENANCE
              -----------------------

              (a)  Subject to the  provisions  of this Lease,  Lessor  grants to
Lessee, its employees, agents, customers and invitees during the Term hereof the
non-exclusive use, in common with Lessor and other tenants and occupants of Park
Place and their  respective  employees,  agents,  customers  and invitees and in
common  with such  others  as Lessor  may  designate  from time to time,  of all
non-allocated  parking  areas  within Park Place for  pedestrian  and  vehicular
ingress and egress and the accommodation and parking areas within Park Place for
pedestrian and vehicular  ingress and egress and the  accommodation  and parking
automobiles as required by the Lessee in conducting  normal business  activities
of Lessee within the Leased  Premises.  Lessor reserves the right,  however,  to
designate certain portions of the parking areas within Park Place for parking of
trucks,  vans, and other vehicles,  and to designate for the specific account of
Lessee,  or other  tenants  in Park  Place,  specific  parking  areas or  spaces
constructed with Park Place. Notwithstanding anything contained in this Lease to
the contrary, Lessor shall have the right, at any time and from time to time, to
change the size, location and nature of the parking areas (so long as the number
of parking  spaces is not reduced)  and/or other common areas within Park Place.
All parking areas and related  facilities which may be furnished by Lessor in or
near the Leased Premises, including employee parking areas, truck way or ways,


                                      -36-
<PAGE>



loading docks, pedestrian sidewalks and ramps, landscaped areas, and other areas
and improvements  which may be provided by Lessor for the general use, in common
with Lessor and other tenants, and their respective employees, agents, customers
and  invitees,  shall  at all  time be  subject  to the  exclusive  control  and
management  of Lessor,  and Lessor shall have the right,  from time to time,  to
establish,  modify and enforce  reasonable rules and regulations with respect to
all parking areas and other  facilities and areas  mentioned in this  paragraph.
Lessee agrees to abide by and conform with all such rules and  regulations  upon
notice thereof and to cause its employees,  agents, customers and invitees to do
the same.  Lessor shall have no liability to Lessee for use of the parking areas
by Lessor or other  tenants  and  occupants  of Park Place and their  respective
employees, agents, customers, or other third parties. No provision of this Lease
shall be  construed  as a demise to Lessee of the  parking  or any other  common
area) within Park Place.  If any repairs  (excluding  repairs caused by Lessee's
normal  use) to the  parking  or  other  common  areas  within  Park  Place  are
necessitated  by reason  of any act or  omission  by  Lessee  or its  employees,
agents, customers or invitees, then, if Lessor chooses to do so, Lessor may make
such repairs and Lessee shall promptly upon demand reimburse Lessor for the full
costs to the extent same are not covered by Lessor's  insurance,  or at Lessor's
option,  Lessor may notify Lessee of the necessity for such repairs, and Lessee,
at its cost and expense,  shall,  with due  diligence,  commence and complete to
Lessor's  satisfaction  the repairs within ten (10) days of Lessee's  receipt of
such notice.

              (b)  "Common  Area  Charges"  means all of the costs and  expenses
which are incurred by Lessor with respect to operation, management,  maintenance
and security of the building  including the parking and other designated  common
areas in Park Place and the exterior  walls of the buildings in Park Place,  and
those areas of Park Place which house mechanical,  electrical or other equipment
or are otherwise  determined from time to time by Lessor to be used in operating
or maintaining Park Place.  "Common Area Charges"  include,  but are not limited
to,  the cost of  maintaining,  repairing,  and  replacing  and  repaving  (when
necessary) the parking and other designated  common areas;  supplies,  tools and
materials  purchased and/or used in connection with repairs,  maintenance and/or
replacements;  wages,  salaries,  and fringe  benefits of all  employees  of the
Lessor for the  portion  of time they are  directly  engaged  in the  operation,
maintenance  and  security  of Park  Place,  including  license  and  fees  (but
excluding wages, salaries and benefits of executive  employees);  removing snow,
ice,  and debris from the  roadways  and parking  areas for  Lessee's use during
normal  business hours;  removal of customary and normal trash;  maintaining and
repairing or repainting (when necessary)  directional signs,  pavement markings,
and parking lot  striping;  repairing  and replacing  (when  necessary)  outdoor
lighting  facilities;  maintaining  the  grass  and  otherwise  caring  for  the
replanting (when  necessary) all shrubbery and landscape  areas;  providing such
security as Lessor,  in its sole  discretion,  deems  advisable;  accounting and
legal fees for common areas at Park Place; utilities,  heating,  ventilation and
air-conditioning charges allocable to designated common areas and other building
service areas.

              (c)  Starting with the Commencement Date and continuing throughout
the Terms of this  Lease,  Lessee  shall pay Lessor in  advance  as  hereinafter
described and as Additional  Rent,  Lessee's  Pro-Rata  Share of all Common Area
Charges for said period.  "Lessee's  Pro-Rata  Share"  shall be a fraction,  the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within all buildings in Park
Place. The Initial Lessee's Pro-Rata Share shall be 7%.


                                      -37-
<PAGE>



              (d)  On or before the  Commencement  Date, on or before the end of
each and every Lease year,  and at such other time(s) as is deemed  desirable by
lessor in its sole  discretion,  Lessor  shall  forward to Lessee a "Common Area
Charges  Statement",  which shall contain Lessor's latest estimate of the Common
Area  Charges  for the then  current or the then  upcoming  (as the case may be)
Lease Year,  and a statement  of Lessee's  Pro-Rata  Share  thereof.  Landlord's
failure to forward,  or to timely  forward,  any Common Area  Charges  Statement
shall not excuse Lessee from its liability for Lessee's Pro-Rata Share of Common
Area Charges.

              (e)  Each  month  during the Term of this  Lease,  along with each
monthly  installment of Base Rent,  beginning with the Commencement Date, Lessee
shall pay to Lessor,  in advance,  an amount  equal to  one-twelfth  (1/12th) of
Lessee's  Pro-Rata  Share of the  Common  Area  Charges as set forth in the then
latest Statement.  If the Commencement Date is a day other than the first day of
a calendar month, then the amount of Common Area Charges due for the first month
and the last month of the Term shall be pro rated on the basis of a thirty  (30)
day month. As soon as practicable near the end of each and every Lease Year, but
no later than 90 days after the end of the Lease year,  Lessor  shall  submit to
Lessee an "Actual Common Area Charges Statement" prepared by Lessor showing that
the Common Area Charges for the then preceding  Lease Year actually  were.  With
the next monthly  installment  of Base Rent due after  Lessee's  receipt of such
Statement,  Lessee shall pay Lessor or Lessor shall credit  Lessee,  as the case
may be the difference  between Lessee's Pro-Rata Share of the actual Common Area
Charges  for said  Lease  Year as shown on said  Statement  and the total of all
Common Area Charges paid by Lessee to Lessor for said Lease Year.

         9.   NON-LIABILITY OF LESSOR
              -----------------------

              (a)  Except  as  otherwise  expressly  provided  in this  Lease or
unless caused by the negligence or intentional  misconduct of Lessor or Lessor's
employees,  agents  and  contractors  while  acting  within  the  scope of their
employment,  Lessor shall not be responsible or liable to Lessee for any loss or
damage to persons or property,  or any  interference or interruption of Lessee's
use of the Leased  Premises,  that may be occasioned by (I) water,  gas,  steam,
wind or the bursting, stoppage or leaking of any pipes, sewer or water lines, or
other  conduits,  fixtures or equipment;  (ii) the  interruption  of any utility
services  to the  Leased  Premises  caused  by the  utility  company;  (iii) any
repairs,  alterations,  maintenance or additions to the Leased  Premises or land
and  building of which they are a part;  (iv) any  casualty;  (v) theft or other
criminal  conduct;  or (vi) the acts or omissions of persons occupying any space
adjacent to the Leased Premises.

              (b)  No  provisions  of this  Lease  shall be deemed to confer any
rights  upon any  person or  entities  other  than the  parties  to this  Lease,
permitted successors and assigns and mortgages.


                                      -38-
<PAGE>



              (c)  Notwithstanding  anything  to the  contrary  provided in this
Lease, it is  specifically  understood and agreed that there shall be absolutely
no personal  liability on the part of Lessor,  including  partners in Lessor and
their  respective  successors  and assigns,  with respect to its  performance or
observance of any of the terms, covenants and conditions of this Lease, and that
Lessee shall look solely to the equity of the Lessor in the land and building of
which the Leased  Premises  form a part for the  satisfaction  of each and every
remedy  of Lessee  in the  event of any  breach  by Lessor of any of the  terms,
covenants  and  conditions  of this Lease to be performed or observed by Lessor,
such exculpation of personal  liability to be absolute and without any exception
whatsoever.

              (d)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations under this Lease,  Lessee may seek and enforce specific  performance
of the Lease against Lessor and pursue such other  equitable  remedies as may be
available to Lessee.  Notwithstanding  the foregoing,  the result of such action
shall be subject to the provisions of Paragraph 9(c) hereof.

         10.  INDEMNITY
              ---------

              Lessee  agrees to  indemnify  and save  Lessor  harmless  from and
against any and all claims,  demands,  costs and  expenses  (including,  but not
limited  to,  reasonable  attorneys'  fees  and  litigation  costs)  for,  or in
connection  with,  any  accident,  injury or damage  whatsoever to any person or
property (I) arising directly or indirectly out of Lessee's use of occupation of
the Leased  Premises,  (ii) occurring in, on or about the Leased  Premises or on
the sidewalks  adjoining the same, or (iii) arising  directly or indirectly from
any act or  omission of Lessee or any of Lessee's  licenses,  servants,  agents,
employees or  contractors.  The foregoing  indemnity shall not apply to any such
claim or demand proximately caused by the negligence or misconduct of Lessor, or
its  employees,  agents and  contractors  while acting within the scope of their
employment.

         11.  LIABILITY INSURANCE
              -------------------

              (a)  Lessee,  at Lessee's sole expense,  shall obtain and maintain
in  effect at all  times  starting  with the  Commencement  Date and  continuing
throughout the term of this Lease, a policy or policies of comprehensive general
public liability insurance,  insuring Lessor,  Lessor's  mortgagee(s) and Lessee
against any liability for injury, death or property damage occurring upon, in or
about any part of the Leased Premises or any  appurtenances  thereto,  affording
protection  to the limits of not less than One Million  Dollars  ($1,000,000.00)
with  respect  to bodily  injury or death of any one  person,  and not less than
Three Million Dollars  ($3,000,000.00) with respect to any one incident, and not
less than Five Hundred Thousand Dollars  ($500,000.00)  with respect to property
damage.  The foregoing  minimum  limits may, at Lessor's  option and upon thirty
(30) days' notice to Lessee, be increased from time to time to reflect inflation
or changed conditions.

              (b)  The insurance  policy(ies)  required to be procured by Lessee
under this Lease:


                                      -39-
<PAGE>


                   (i)   Shall  be  issued  by  a  reputable  insurance  company
licensed to do  business  in the State of Maryland  and shall have such form and
content as shall be approved by Lessor.

                   (ii)  Shall be  written as primary  policy  coverage  and not
contributing with, or in excess of, any coverage which Lessor may carry.

                   (iii) Shall have an endorsement thereto to the effect that no
act or  omission by Lessee  shall  affect the  obligation  of the insurer to pay
Lessor the full  amount of any loss  sustained  by Lessor  and shall  contain an
express  waiver of any right of  subrogation  by the insurance  company  against
Lessor, its agents and employees.

                   (iv)  Shall name Lessor as an additional named insured.

              (c)  On or before the Commencement Date, and at least fifteen (15)
days before the expiration date of the policy,  Lessee shall deliver to Lessor a
certificate  of insurance  evidencing  the  existence  and good  standing of the
liability  policy  referred to in Paragraph  11(a),  together  with  evidence of
payment of all premiums.  The insurance  required to be carried under this Lease
may be carried  under a blanket  policy  covering the Leased  Premises and other
locations of Lessee. The insurance policy required to be carried by Lessee shall
provide  that such  insurance  policy  shall not be canceled  unless  Lessor and
Lessor's mortgagee(s) shall have received thirty (30) days' prior written notice
of cancellation.  In the event that Lessee shall,  prior to the thirtieth (30th)
day  before  any  insurance  policy  will  lapse or  terminate,  fail to furnish
evidence of the coverage and pay the premium therefor for a period not exceeding
one year,  and the  premiums  so paid by Lessor  shall be payable by Lessee,  on
demand, as Additional Rent.

         12.  HAZARD INSURANCE
              ----------------

              (a)  Starting with the Commencement Date and continuing throughout
the Term of this  Lease,  Lessee  shall pay to Lessor,  or such  other  party as
Lessor shall designate by written notice to Lessee, as Additional Rent, Lessee's
Pro-Rata Share, as defined in Paragraph 12(e) hereof,  of the premiums and other
charges (the "Premiums") that may be incurred or contracted for or by Lessor for
fire and casualty  insurance  coverage  for the land and  buildings of which the
Leased  Premises form a part,  including  protection  from such perils as may be
insured against under a broad form extended coverage  endorsement or on all risk
of physical loss policy,  and further  including  loss of rental  coverage in an
amount equal to the Rent for one (1) Lease Year.  The premiums for all insurance
to be  obtained  by  Lessor  under  this  Paragraph  12(a)  shall be  reasonably
competitive  with the  premiums  charged for  similar  insurance  protection  by
reputable  insurers for  comparable  properties.  Lessee agrees that it will not
store  gasoline or other  explosive,  flammable or toxic  material in the Leased
Premises or do anything which may cause Lessor's  insurance  company to void the


                                      -40-
<PAGE>



policy covering the Leased Premises or to increase the premium thereon, and that
Lessee will  immediately  conform to all rules and regulations from time to time
made or established by Lessor's  insurance  company or insurance  rating bureau.
Lessor will do everything reasonably possible and consistent with the conduct of
Lessee's  business  to obtain the lowest  possible  rates for  insurance  on the
Leased Premises.  If, however,  the cost to Lessor of obtaining insurance on the
Leased  Premises  (or the  building  which the Leased  Premises  are located) is
increased  due to the  Lessee's  occupancy  thereof,  and the  Lessor's  insurer
provides evidence that said increase is the direct cause of Lessee's  occupancy,
Lessee agrees to pay,  promptly  upon demand,  as  additional  rental,  any such
increase.

              (b)  On or before the Commencement Date and before the due date of
each and  every  bill for the  Premiums,  Lessor  shall  forward  to  Lessee  an
"Insurance  Statement" which shall contain an estimated  statement of the amount
due from Lessee from time to time as Lessee's  Pro-Rata  Share of the  Premiums.
Lessor's failure to forward, or to timely forward, any Insurance Statement shall
not  excuse  Lessee  from  its  liability  for  Lessee's  Pro-Rata  Share of the
Premiums.

              (c)  Each and every  month  during the Term of this  Lease,  along
with its monthly installment of Fixed Rent,  beginning on the Commencement Date,
Lessee  shall pay  Lessor  an amount  equal to  one-twelfth  (1/12) of  Lessee's
Pro-Rata  Share  of the  Premiums  as set  forth in the  then  latest  Insurance
Statement,  which  shall  be  credited  toward  Lessee's  Pro-Rata  Share of the
Premiums when the same are due and payable.  Should Lessee's monthly installment
payments on account of Lessee's Pro-Rata Share of the Premiums for the period to
which the Premiums relate exceed the actual amount of Lessee's Pro Rata Share of
such Premiums, the excess amount shall be credited against Lessee's installments
for Premium thereafter  becoming due. If the Commencement Date is other than the
first day of a period to which the Premiums relate, then the installments of the
Premiums  due from the Lessee  shall be pro rated on the basis of a thirty  (30)
day month.

              (d)  Notwithstanding  the  provisions  of  Paragraph  12(c) above,
Lessor may, upon ten (10) days' written notice to Lessee,  require Lessee to pay
Lessee's  Pro- Rata Share of the  necessary  Increased  Premiums due to Lessee's
occupancy at such times as the  Premiums  are due and payable to the  respective
insurance  company or companies or in such manner as is required of Lessor under
any mortgage, whether such payments be in lump sum or other installments.

              (e)  Lessee's  Pro-Rata  of  the  Premiums  shall  be of  all  the
Premiums due for the land and building of which the Leased Premises form a part.
As used in this Paragraph 12, "Lessee's Pro Rata Share" shall be a fraction, the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within the building of which
the Leased Premises form a part.

              (f)  Lessor  hereby   releases   Lessee  from  any  liability  and
responsibility  to Lessor to anyone  claiming  through or under Lessor by way of
subrogation or otherwise,  for any and all loss or damage to the Leased Premises
caused by fire or any  casualty  covered by  insurance  to the extent  insurance


                                      -41-
<PAGE>


proceeds are received  therefor,  even if such fire or other casualty shall have
been caused by the fault or negligence of Lessee,  or anyone for whom Lessee may
have been responsible.  Lessor's  insurance  policies shall include  appropriate
clauses (i) waiving all rights of  subrogation  against  Lessee with  respect to
losses payable under such  policies,  and (ii) agreeing that such policies shall
not be  invalidated  should the insured waive in writing prior to a loss any and
all rights of recovery against the other party hereto for losses covered by such
policies.

         13.  DAMAGE TO THE DEMISED PREMISES
              ------------------------------

              (a)  In the event of partial or total damage or destruction of the
Leased  Premises  by fire,  other  casualty,  or any  cause  whatsoever  (except
condemnation),  Lessee shall give immediate  notice to Lessor.  If the damage or
destruction  is insured  against by Lessor,  this Lease  shall  continue in full
force and effect,  and, to the extent that insurance  proceeds  respecting  such
damage or  destruction  are  subject  to being  utilized  and,  in fact,  may be
utilized by Lessor for repair,  Lessor shall cause such damage or destruction to
be repaired with reasonable speed at the expense of Lessor,  except as otherwise
hereinafter  provided  in this  Paragraph  13. If in the  reasonable  opinion of
Lessor the damage or destruction  is such that repair thereof cannot  reasonably
be  completed  within  ninety  (90) days of the date the  damage or  destruction
occurs,  Lessor  shall have the right to  terminate  this Lease by the giving of
written  notice to such effect to Lessee  within thirty (30) days of the date of
Lessor's receipt of Lessee's notice of damage or destruction.  In no event shall
Lessor be  required  to restore or repair  Lessee's  personal  property or other
contents within the Leased Premises.  Due allowance shall be made for reasonable
delay which may arise by reason of Lessor's  adjustment of loss under  insurance
policies  and on account of labor  troubles or any other cause  beyond  Lessor's
control. To the extent that the Leased Premises are rendered  untenantable,  the
Rent  and  Additional  Rent  shall  proportionately  abate.  If  the  damage  or
destruction  is not covered by  insurance  maintained  by Lessor or if insurance
proceeds  respecting the damage or destruction are not subject to being utilized
for repair and, in fact, may be not so utilized, Lessor shall not be required to
repair the damage or  destruction.  In the event the damage or destruction is so
extensive to the  building of which the Leased  Premises are a part as to render
it uneconomical, in Lessor's opinion, to restore the Leased Premises, the Lease,
at the option of Lessor,  shall be terminated  upon written notice to Lessee and
Lessee shall immediately thereafter vacate the Leased Premises and surrender the
same to Lessor.  No such termination  shall release Lessee from any liability to
Lessor from any of the  obligations or duties imposed on Lessee under this Lease
prior  to the  damage.  Upon  any  termination  of this  Lease  pursuant  to his
Paragraph 13(a),  Rent and Additional Rent shall be prorated and adjusted to the
date of such termination.

              (b)  Lessee hereby  waives any and all right of recovery  which it
might  otherwise  have against  Lessor,  its agents and  employees,  for loss or
damage to Lessee's contents, furniture, furnishings, fixtures and other property
removable  by Lessee under the  provisions  of this Lease to the extent that the
same is to be covered by Lessee's insurance  thereunder,  except where such loss
or damage  may  result  from the  negligence  of fault of  Lessor,  its  agents,
employees or contractors.


                                      -42-
<PAGE>



         14.  EMINENT DOMAIN
              --------------

              (a)  If during the term of this  Lease,  the Leased  Premises,  or
such a substantial  portion of the Leased  Premises as shall prevent Lessee from
conducting its normal business, shall be taken by proper authority for public or
quasi-public  use, then Lessee may terminate this Lease by giving Lessor written
notice of  termination  within  thirty (30) days after  receipt of notice of the
taking,  and Lessee's  obligation  to pay rent,  taxes,  and other charges shall
terminate as of the date of the termination notice. If only a part of the Leased
Premises is taken and the part not taken shall be reasonably  sufficient for the
purpose of conducting Lessee's normal business,  this Lease shall remain in full
force  and  effect,   except  that  the  Rent  and  Additional   Rent  shall  be
proportionately reduced.

              (b)  All  compensation  awarded for any taking shall belong to and
be the property of Lessor. Nothing contained herein, however, shall be construed
to preclude Lessee from  prosecuting  any claim directly  against the condemning
authority  for loss of  business or  depreciation,  damage or cost of removal of
personal property  belonging to Lessee so long as the claim does not diminish or
otherwise  adversely  affect  Lessor's award or the award  otherwise  payable to
Lessor's mortgagee.

         15.  CONDITION OF LEASED PREMISES; MAINTENANCE AND REPAIR
              ----------------------------------------------------

              (a)  Except for the repairs that Lessor is specifically  obligated
to make  under  Paragraph  15(b)  hereof,  and  except  for  repairs  covered by
contractor  warranties held by Lessor for Lessor's  benefit,  during the term of
this Lease,  Lessee, at Lessee's sole cost and expense,  shall promptly make all
repairs,  perform all maintenance,  perform all custodial  services and make all
replacements  in and to the Lease  Premises  that are necessary in order to keep
the  Leased  Premises  in good  order and  repair  and in a safe and  tenantable
condition. Without limiting the generality of the foregoing, Lessee, at its sole
cost and expense,  is specifically  required to make promptly all repairs to (i)
any pipes,  water and waste lines,  ducts,  wires or conduits  beneath or in the
Leased  Premises  or within the ceiling of the Leased  Premises;  (ii) any glass
windows included within the Leased Premises;  (iii) Leasee's  sign(s);  (iv) any
electrical,  natural gas (if any),  heating,  ventilating and air  conditioning,
plumbing,  and other  systems,  equipment,  fixtures  and items  installed in or
servicing the Leased Premises; (v) the floors,  ceilings and walls of the Leased
Premises;  (vi) the entrance and exit and auxiliary driveways, if any, which are
part of and  service  the Leased  Premises;  and (vii) any portion of the Leased
Premises  damaged by Lessee's use or occupancy of the Leased  Premises or by any
act,  omission or  negligence  of Lessee,  or any of its  respective  employees,
agents, invitees,  licensees or contractors.  All repairs, and replacements made
by Lessee shall  utilize  materials  and  equipment  which are at least equal in
quality and usefulness to those originally used in the Leased Premises.  Lessee,
at Lessee's expense,  shall enter into one (1) or more service contracts for the

 
                                      -43-
<PAGE>



maintenance  of the  heating,  ventilating  and  air  conditioning  systems  and
equipment.  Lessee shall keep the Leased Premises free of all insects,  rodents,
vermin and pests of every type and kind. Lessee shall also,  promptly and at its
own expense,  keep any sidewalks and curbs adjacent to the Leased Premises clean
and free from snow,  ice,  dirt and rubbish.  Lessee  shall not  (directly or by
sufferance)  place any equipment,  materials or debris on the roof of the Leased
Premises, or cut, drive nails into or otherwise mutilate such roof.

              (b)  Lessor shall within  thirty (30) days (or such longer  period
of time as may  reasonably  be required  by Lessor)  after  written  notice from
Lessee with respect thereto,  make necessary  structural repairs to the exterior
walls  and  shall  keep  in  good  order,  condition  and  repair  the  exterior
foundations, downspouts, gutters and roof of the Leased Premises and the portion
of the  plumbing  and sewage  system  located  outside the building in which the
Leased  Premises  are located (it being  understood  and agreed that  Landlord's
obligations exclude the exterior and interior of all windows, doors, plate glass
and signs, and repairs  required by any casualty except as otherwise  covered by
Paragraph 13 herein). Lessee shall, upon demand, reimburse Lessor for reasonable
costs of making  any such  repairs or  replacements  caused by  Lessee's  use or
occupancy  of the Leased  Premises  or by any act,  omission  or  negligence  of
Lessee,   any  subtenant  or  concessionaire  of  Lessee,  or  their  respective
employees,  agents,  invitees,  licensees or contractors  (excluding  repairs or
replacements caused by Lessee's normal use).

              (c)  Lessee  hereby  covenants  to contain all  garbage,  rubbish,
waste,  trash and debris  generated  in  conjunction  with its use of the Leased
Premises in  containers  provided by Lessor (which shall be emptied no more than
three times per week, but at least once a week) so as not to constitute a safety
or fire hazard.

         16.  ALTERATIONS
              -----------

         Lessee  shall  not  make  any  non-structural   interior   alterations,
additions or improvements in or to the Leased Premises without the prior written
consent of Lessor in each  instance,  which  consent  shall not be  unreasonably
withheld  or  delayed.   Lessee  shall  not  take  any  structural  or  exterior
alterations,  additions or improvements to the Leased Premises without the prior
written  consent of Lessor.  Should Lessor fail to respond  within  fifteen (15)
working  days after  Lessor's  receipt of any  written  request  from Lessee for
Lessor's  consent  to  any  proposed  alterations,  additions  or  improvements,
Lessor's   consent  shall  be  deemed  to  have  been  granted.   All  permitted
alterations, additions and improvements made by Lessee shall be performed (i) in
a good and workmanlike  manner, (ii) in accordance with all applicable legal and
insurance  requirements,  (iii) only after receipt by Lessee and presentation to
Lessor of all necessary permits and licenses, and (iv) at Lessee's sole expense.
Except for Lessee's removable trade fixtures, and all improvement made by Tenant
in the processing and storage areas, all improvements,  repairs, alterations and
additions and all other non-trade  fixtures,  whether  installed before or after
the  execution  of this  Lease,  shall  remain  upon the Leased  Premises at the
expiration or sooner termination of this Lease and become the property of Lessor
without  payment  therefor by Lessor,  unless prior to the  termination  of this



                                      -44-
<PAGE>



Lease,  Lessor shall have given written  notice to Lessee to remove the same, in
which event Lessee, at its expense, will remove such alterations,  improvements,
additions  and/or  fixtures  and  repair and  restore  any and all damage to the
Leased Premises caused by the installation and/or removal thereof.

         17.  SIGNS
              -----

              Lessee may not install any sign  without  Lessor's  prior  written
consent.  All signs shall be in strict  compliance  with the sign  criteria  set
forth in Exhibit "C" attached hereto and made part hereof.  Lessee shall install
all exterior signs for the Leased Premises at the cost and expense of Lessee. No
sign, advertisement or notice shall be inscribed,  painted, affixed or otherwise
displayed on any part of the outside or the inside of the Leased Premises or the
building  of which the Leased  Premises  are a part,  unless  Lessor  shall have
approved the sign, advertisement,  or notice in writing prior to installation of
the same. If any sign,  advertisement,  or notice is exhibited by Lessee without
having first obtained Lessor's approval thereof,  Lessor shall have the right to
remove the same and Lessee shall be liable for any and all expenses  incurred by
Lessor in said  removal.  No signs made of paper and visible from outside of the
Leased Premises shall be allowed in the Leased Premises. No mobile sign, such as
may be affixed to the side of a truck or a trailer or a mobile platform shall be
permitted in the parking area.

         18.  LAWS AND INSURANCE STANDARDS
              ----------------------------

         Lessee  shall,  at  Lessee's  sole  expense,  promptly  comply in every
respect with all  applicable  laws,  ordinances,  rules and  regulations  of all
federal,  state,  county, and municipal  governments now in force or that may be
enacted in the future,  all applicable  and  enforceable  directions,  rules and
regulations of the fire marshall,  health officer,  building  inspector or other
proper  officers  of  any  governmental  agency  having  jurisdiction,  and  the
applicable standards established from time to time by the National Board of Fire
Underwriters,  the National Fire Protective Association,  or any similar bodies.
Lessee expressly covenants and agrees to indemnify and save Lessor harmless from
any  penalties,  damages or charges  imposed for any violation of the foregoing.
Notwithstanding the foregoing,  Lessee shall not be required to make any changes
or modifications to the Leased Premises, unless (a) the same are required due to
Lessee's specific use and/or occupancy of the Leased Premises,  (b) the same are
required due to structural specifications (beyond building standard) required by
Lessee, or (c) the same relate to repairs, maintenance or other responsibilities
of Lessee under this Lease, e.g., Paragraph 15(a) hereof.

         19.  MECHANIC'S LIENS
              ----------------

              Lessee shall do all things  necessary to prevent the filing of any
mechanics' or other liens against the Leased Premises,  or the land the building
of which the Leased  Premises are part,  by reason of work,  labor,  services or
materials  supplied or claimed to have been supplied to Lessee or anyone holding
the Leased premises,  through or under Lessee.  If any lien shall at any time be
filed,  Lessee shall either cause the lien to be discharged of record within ten


                                      -45-
<PAGE>



(10) days after knowledge of its filing or, if Lessee in its discretion and good
faith determines that the lien should be contested,  shall furnish such security
as may be necessary to prevent the filing of any foreclosure  proceedings during
the pendency of the contest.  If Lessee shall fail to discharge  any lien within
such period or fail to furnish  such  security,  then,  in addition to any other
right or remedy,  Lessor may, but shall not be obligated to,  discharge the same
either by paying the amount  claimed to be due or by procuring  the discharge of
lien by deposit in court or by giving  security or in such other manner as is or
may be  prescribed  by law.  Lessee  shall  repay to Lessor  on demand  all sums
disbursed or deposited by Lessor pursuant to the foregoing provisions, including
the  expenses  and  reasonable  attorneys'  fees  incurred  by  Lessor.  Nothing
contained  in this Lease shall imply that  Lessee has any  authority  or consent
from Lessor to subject Lessor's estate to any mechanics', materialman's or other
lien.

         20.  ASSIGNMENT AND SUBLETTING
              -------------------------

              (a)  Lessee shall not assign, mortgage or encumber any interest in
this Lease or sublet all or any part of the Leased  Premises  without  the prior
written consent of Lessor.  Lessor shall not unreasonably  withhold or delay its
consent to an assignment or subletting of this Lease.

              (b)  No  permitted   assignment  or  subletting   shall   release,
discharge or affect the liabilities of Lessee as provided for in this Lease, and
Lessee  shall  at all  times  remain  primarily  liable  under  this  Lease.  An
assignment  by operation of law shall be deemed a  prohibited  assignment  under
this Paragraph.

         21.  INSOLVENCY
              ----------

              Lessor may,  at its option,  declare  this Lessee  terminated  and
reenter  and  resume  possession  of the  Leased  Premises,  if Lessee  shall be
adjudicated  a  bankrupt  or  insolvent,  or if a receiver  or trustee  shall be
appointed for Lessee's business or property,  or if Lessee shall file a petition
in bankruptcy or insolvency, or if a petition or other proceeding shall be filed
by or against Lessee seeking corporate or other  reorganization,  liquidation or
other similar relief or if Lessee shall make an assignment or an arrangement for
the benefit of creditors,  or if an involuntary  petition shall be filed against
Lessee in  bankruptcy or  insolvency  and such  petition  shall not be dismissed
within sixty (60) days.


                                      -46-

<PAGE>



         22.  REMEDIES CUMULATIVE
              -------------------

              The various rights,  elections and remedies of Lessor contained in
this  Lease  shall  be  cumulative,  and no one of them  shall be  construed  as
exclusive of any of the others,  or of any right,  priority or remedy allowed or
provided for by law.

         23.  WAIVER OR DEFAULT
              -----------------

              The waiver by either  party of any default in the  performance  by
the other of any covenant shall not be construed to be a waiver of any preceding
or subsequent  default of the same or any other covenant  contained herein.  The
subsequent  acceptance  of Rent or other  sums by  Lessor  shall not be deemed a
waiver of any  preceding  default  other  than the  failure of Lessee to pay the
particular rental or other sum so accepted.

         24.  HOLDING OVER
              ------------

              If Lessee shall hold  possession of the Leased  Premises after the
end of the term or other termination of this Lease, Leases shall be deemed to be
occupying the Leased Premises as a tenant from month to month, subject to all of
the  conditions,  provisions and obligations of this Lease;  provided,  however,
Lessee  shall be liable for any and all  damages  and  expense  that  Lessor may
sustain by virtue of Lessee's holding over,  including,  but not limited to, any
amount for which Lessor may be liable under,  or as a result of, any other lease
entered into by Lessor for a term  beginning at or after the  expiration  of the
term of this Lease.  Nothing  contained  in this Lease shall be  construed  as a
consent by Lessor to the  occupancy  or  possession  of the Leased  Premises  by
Lessee after the expiration of the term of this Lease. Rather, at the end of the
term of the  Lease,  Lessor  shall be  entitled  to the  benefit  of all laws or
ordinances  relating to the recovery of the  possession  of lands and  tenements
held over by tenants that now may be in force or hereafter  may be enacted,  and
Lessor may proceed under such laws or ordinances,  without notice to Lessee, all
statutory notice requirements being expressly waived by Lessee.


                                      -47-
<PAGE>



         25.  SURRENDER
              ---------

              Upon the expiration of the term of this Lease,  Lessee immediately
shall surrender the Leased Premises broom-clean and in good order and condition,
ordinary wear and tear excepted.  All of Lessee's  personal property at or about
the Leased Premises (but not permanently  affixed parts of the Leased  Premises)
shall be removed by Lessee at or before the expiration of this Lease or shall be
deemed  abandoned by Lessee.  Any damage to the Leased  Premises  caused by such
removal shall be repaired by Lessee at its own expense.

         26.  DEFAULT
              -------

              (a)  If Lessee fails to pay any Rent or  Additional  Rent when due
and such failure continues for a period of five (5) days after Lessor shall have
made written demand on Lessee for payment, or if Lessee otherwise is at any time
in default under this Lease and continues in such default for a period of thirty
(30) days after  Lessor  shall  have  demanded  in  writing to Lessee  that such
default be cured, or if such latter default is not capable of being cured within
a fifteen (15) day period,  such additional time (not to exceed  forty-five (45)
days) as is reasonably necessary to cure such default,  provided Lessee promptly
commences  and  diligently  pursues to cure such  default,  then  Lessor may, at
Lessor's  option,  terminate this Lease (without  releasing Lessee of liability)
and by summary  proceedings or other manner  prescribed by law, reenter and take
possession of the Leased  Premises.  If Lessor  should so terminate  this Lease,
Lessee  shall pay to Lessor as damages,  upon demand,  all expenses  (including,
without limitation,  attorneys' fees) of any proceedings  necessary in order for
Lessor  to  recover  possession  of the  Leased  Premises  and the  expenses  of
reletting  the  Leased  Premises  (including,  without  limitation,   reasonable
attorneys'  fees,  brokerage  commissions,  and the costs of putting  the Leaded
Premises in good order and preparing it for reletting, plus either:

                   (i)  Liquidated damages in an amount equal to the excess,  if
any,  of the Rent and  Additional  Rent that  would have been  payable  over the
unexpired  portion of the term of this Lease over the rental value of the Leased
Premises for such unexpired  portion of the term of this Lease, as discounted at
the  then  publicly  declared  prime  rate of the  Federal  Bank  in  Baltimore,
Maryland; or

                   (ii)  Damages  in an amount  to the  excess,  if any,  of the
monthly  Rent and  Additional  Rent over the  monthly  rentals,  if any, if fact
collected by Lessor as the result of a reletting of the Leased  Premises at such
rent and upon such terms as Lessor,  in its sole  discretion,  elects to accept.
Separate  actions may be maintained  each month by Lessor to recover the damages
then due as provided for in this subparagraph (ii) and any such action shall not
prejudice the rights of Lessor to collect damages for any subsequent  month in a
similar proceeding.

              (b)  No re-entry or reletting of the Leased  Premises,  whether or
not the term of such reletting  extends beyond the term of this Lease,  shall be
construed  as an  election  by Lessor to: (i) accept a  surrender  of the Leased
Premises, or (ii) release Lessee of any of its obligations under this Lease.


                                      -48-
<PAGE>



              (c)  Should Lessor,  pursuant to its rights under  Paragraph 26(a)
hereof,  elect to terminate  this Lease and reenter and take  possession  of the
Leased Premises,  Lessor shall use commercially  reasonable efforts,  under then
prevailing circumstances, to relet the Leased Premises.

         27.  ACCESS TO LEASED PREMISES
              -------------------------

              (a)  Lessor and its  designees  shall have the right  (subject  to
being accompanied by Lessee's  representative at all times for security reasons)
to enter  upon the  Leased  Premises  at all  reasonable  hours,  after 24 hours
notice,  (and in  emergencies,  at all times):  (i) to inspect the same; (ii) to
make repairs,  additions,  or alterations to the Leased Premises or the building
in which the same are located or any property  owned or  controlled by Landlord;
(iii) to  exhibit  the  Leased  Premises  to any  prospective  buyer,  lessee or
mortgagee or their respective agents or representatives; and (iv) for any lawful
purpose.

              (b)  For a period  commencing three (3) months prior to the end of
the term,  Lessor may have reasonable  access to the Premises for the purpose of
exhibiting  the same to  prospective  tenants and to post any "For Rent" or "For
Lease" signs upon the Leased Premises.

         28.  SUBORDINATION AND ATTORNMENT
              ----------------------------

              (a)  This  Lease is  subject  and  subordinate  to the lien of all
present  and  future  mortgages  and/or  deeds of trust  encumbering  the Leased
Premises,  all present and future advances under such mortgages  and/or deeds of
trust, and all renewals, extensions,  modifications,  recastings or refinancings
of such  mortgages  and/or deeds of trust.  Lessee agrees that, in the event any
proceedings are brought under or for the foreclosure of any such mortgage and/or
deed of trust,  Lessee shall, if requested to do so by the beneficiary  under or
holder of such mortgage  and/or deed of trust or by any successor in interest to
such beneficiary or holder, automatically become the lessee of such beneficiary,
holder  or  successor  in  interest  and  shall  automatically  attorn  to  such
beneficiary, holder and/or successor in interest and recognize such beneficiary,
holder  and/or  successor  in  interest  as the  Lessor  under  this  Lease.  In
confirmation of such attornment, however, Lessee shall, at the request of Lessor
or any  beneficiary,  holder or  successor  in  interest,  promptly  execute any
requisite or  appropriate  certificate or other document for the benefit of such
beneficiary, holder and/or successor in interest.

              (b)  In the event that,  after the date of this Lease, a bona fide
loan shall be made by an insurance company, savings bank, commercial bank, trust
company, or other lender and secured by a mortgage or deed of trust constituting


                                      -49-
<PAGE>



a lien  against  any  portion  of the  Leased  Premises  and said  lender  shall
complete,   execute   and   acknowledge   a   subordination,   attornment,   and
non-disturbance agreement, then and in that event, Lessee shall subordinate this
Lease to said mortgage or deed of trust by executing and  acknowledging the said
subordination, attornment and non-disturbance agreement.

              (c)  Upon any assignment or  termination  of Lessor's  interest in
the Leased Premises,  Lessee shall,  upon request,  attorn in writing to the new
owner of the Leased  Premises and shall pay to the new owner all rents and other
monies  required to be paid and perform all of the other  obligations  of Lessee
under this  Lease.  Following  any sale by Lessor of the  property  of which the
Leased  Premises are a part, all  obligations to the assigning  Lessor to Lessee
shall cease and  terminate and Lessee shall look solely to the successor for the
performance of Lessor's duties hereunder.

              (d)  Notwithstanding  the  foregoing,  this  Lease  shall  not  be
terminated so long as Lessee is not in default of any provisions in this Lease.

              (e)  Lessor shall,  within fifteen (15) days after the date hereof

(or prior to the effective date of any encumbrance  mentioned in this Section 28
created after the date hereof)  obtain from the holder of any such  encumbrance,
an agreement whereby if such holder or any successor in interest shall come into
possession  of the  Leased  Premises,  or any part  thereof,  by  dispossession,
foreclosure or otherwise,  or shall become the owner of such  property,  or take
over the rights of Lessor to such  property,  said holder  shall not disturb the
possession, use or enjoyment of the Leased Premises by Lessee, its successors or
assigns,  nor  disaffirm  this  Lease  or  Lessee's  rights  or  estate  granted
hereunder,  so long as Lessee performs all of its obligations in accordance with
the terms of this Lease.

         29.  RIGHT TO CURE DEFAULTS
              ----------------------

              (a)  If  Lessee  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then, in addition to Lessor's other rights,  but
not the  duty,  to cure  such  breach  at  Lessee's  expense.  Lessee  agrees to
reimburse  Lessor,  within fifteen (15) days after Lessor submits a statement of
the amount due, as  Additional  Rent,  for all expenses  incurred by Lessor as a
result of any efforts made by Lessor to cure any such breach.

              (b)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then,  in addition to Lessee's  other rights and
remedies under this Lease at law and in equity, Lessee shall have the right, but
not the duty,  to cure such breach at Lessor's  expense;  provided that prior to
the  exercise of such right to cure,  Lessee  shall give Lessor  written  notice


                                      -50-
<PAGE>



specifying  the nature of the breach and Lessor  shall be  entitled  to ten (10)
days  after  receipt of such  notice  within  which to cure said  breach or such
additional  time as may be necessary if such breach is not  susceptible  to cure
within said ten (10) days,  in which case Lessor  shall  commence to cure within
said ten (10) day period. Lessor agrees to reimburse Lessee, within fifteen (15)
days after  Lessee  submits a  statement  of the amount  due,  for all  expenses
incurred by Lessee as a result of any efforts by Lessee to cure any such breach.
If Lessor fails to reimburse  Lessee as aforesaid,  Lessee may offset the amount
due against the  payments of Rent  becoming  due  hereunder  unless  Lessor give
written  notice of dispute  within said  fifteen  (15) day period  either to the
existence of any default or the  reasonableness  of the amount expended to cure.
In the event such notice of dispute is given, the provisions of subparagraph (c)
shall govern. The right to setoff against Rent shall be subordinate to and there
shall be no setoff  against the holder of any  mortgages or deed of trust or any
purchaser  at  foreclosure  or deed in lieu thereof on all or any portion of the
Leased  Premises.  The amount of all setoffs shall be limited to the  cumulative
sum of One Hundred Thousand Dollars ($100,000.00).

              (c)  If  Lessor  has  given  notice  of  dispute  as  provided  in
subparagraph (b), Lessee may have the issues of whether the Lessor is in default
of  its  obligations  or  the  reasonableness  of  the  amount  of  expenditures
determined by arbitration.  Pending the results of such arbitration, there shall
be no setoff. In the event the arbitrators determine that Lessor was in default,
Lessor  shall pay all costs of  arbitration  and Lessee  shall have the right to
offset  all of its costs and  expenses  of  remedying  such  default  (including
unreimbursed costs of the arbitration  proceeding)  against the payments of Rent
becoming due hereunder, subject to the limitations set forth in subparagraph (b)
above. If the arbitrators  determine that Lessor was not in default, then Lessee
will pay all of the arbitration.

              (d)  If Lessor is determined  to be in default in its  obligations

under  Paragraph  15(c) of this Lease and Lessee  shall  remedy such  default in
accordance with the preceding paragraph,  Lessee shall be entitled to offset one
hundred  fifteen  percent  (115%) of the costs and  expenses of  remedying  such
default, with the additional fifteen percent (15%) being to reimburse Lessee for
its overhead.

         30.  BROKERAGE
              ---------

              Lessor hereby  acknowledges  that Montgomery Realty ("Broker") has
served as Lessor's  agent in  connection  with this Lease and agrees to pay said
Broker a  commission  as per a separate  agreement  between  Lessor and  Broker.


                                      -51-
<PAGE>



Lessor  warrants  to Lessee and Lessee  warrants to Lessor that it has not dealt
with any other  broker or real estate  agent or finder in  connection  with this
Lease and that, except for the aforesaid  commission payable to Broker, no right
or claim for  commission or other  compensation  has been created by its actions
with  respect to this Lease.  Lessor and Lessee  shall  indemnify  and hold each
other  harmless  against all loss,  liability or expense,  including  reasonable
attorney's fees and litigation costs, incurred by the other to the extent one or
the other is shown to be in breach of the foregoing warranties.

         31.  EFFECT OF CONVEYANCE
              --------------------

              If during the term of this Lease  Lessor sells its interest in the
Leased  Premises or this Lease,  then from and after the effective  date of such
sale,  Lessor  shall  be  released  and  discharged  from  any and  all  further
obligations and responsibilities  under this Lease except those already accrued.
Any such sale  shall be  subject to this  Lease and  Lessor  shall  require  any
purchaser to acknowledge the existence of Lessee's tenancy.

         32.  INTERPRETATION
              --------------

              The captions by which the  paragraphs of this Lease are identified
are for  convenience  only and shall have no effect upon the  interpretation  of
this Lease. Whenever the context so requires,  the singular number shall include
the plural,  and plural shall refer to the singular and the neuter  gender shall
include the masculine and feminine genders. If any provision of this Lease shall
be held to be unenforceable by a court, the remaining provisions shall remain in
effect and shall in no way be impaired.

         33.  ENTIRE INSTRUMENT
              -----------------

              All of the agreements previously and contemporaneously made by the
parties are  contained  in this Lease,  and this Lease cannot be modified in any
respect except by a writing executed by Lessor and Lessee.

         34.  ESTOPPEL CERTIFICATES
              ---------------------

              Recognizing  that both  parties may find it necessary to establish
to third parties, such as accountants,  banks,  mortgagees or the like, the then
current status of performance hereunder, either party, on the written request of
one to the  other  made  from  time to time,  will  promptly  furnish  a written
certificate  on the status of any matter  pertaining  to this Lease in such form
and substances as may from time to time be reasonably required.


                                      -52-
<PAGE>



         35.  NOTICES
              -------

              Any notices and other  communications  required or permitted to be
given by either  party to the other  shall be in writing  and shall be deemed to
have been served when hand  delivered  or, if the United States Mail is used, on
the second business day after the notice is deposited in the United States Mail,
postage prepaid, registered or certified mail, or by overnight delivery service,
and addressed to the parties as follows:

         To Lessee:               Jacques R. Rubin
                                  9000 Virginia Manor Road, Suite 290
                                  Beltsville, Maryland  20705

         To Lessor:               Muirkirk Manor Associates Limited Partnership
                                  9000 Virginia Manor Road, Suite 201
                                  Beltsville, Maryland   20705


Either party,  by written  notice to the other,  may change its address to which
notices are to be sent.

         36.  WAIVER
              ------

              Any waiver of either  Lessor or Lessee of any  default,  breach or
failure by the other to comply with any term,  condition,  or  provision of this
Lease shall not constitute a waiver of any other  default,  breach or failure by
such  defaulting  party.  No covenant,  term or condition of this Lease shall be
deemed to have been waived by either  party unless such waiver be in writing and
signed by the party to be charged therewith.

         37.  QUIET ENJOYMENT
              ---------------

              So  long as  Lessee  is not in  default  beyond  applicable  grace
periods,  Lessee shall have peaceful and quiet use and  possession of the Leased
Premises  without  hindrance  on the part of Lessor or any person  claiming  by,
through or under Lessor.

         38.  RECORDING THIS LEASE
              --------------------

              Lessee may not record  either this Lease nor a memorandum  thereof
among or in any public records without Lessor's prior written consent.


                                      -53-
<PAGE>



         39.  GOVERNING LAW
              -------------

              All questions with respect to  construction  of this Lease and the
rights and liabilities of the parties shall be determined in accordance with the
laws of the State of Maryland.

         40.  BENEFIT
              -------

              Subject to the restrictions on assignment and subletting set forth
in Paragraph 20, the  covenants,  terms and conditions of this Lease shall inure
to the  benefit of and be binding  upon  Lessor and Lessee and their  respective
successors and assigns.

         41.  REASONABLE CONSENT
              ------------------

              Wherever in this Lease  Lessor or Lessee is required to obtain the
consent or  approval of the other,  it is agreed  that such  consent or approval
shall not be unreasonably withheld or delayed.

         42.  TIME OF ESSENCE
              ---------------

              Time is of the  essence  in the  performance  of all of Lessor and
Lessee's obligations under this Lease.

              (See Lease Addendum for Paragraphs 43 and 44)



                                      -54-
<PAGE>



         IN WITNESS WHEREOF, the parties have executed this Lease on the day and
year first above written.



WITNESS:                              LESSOR:

                                      MUIRKIRK MANOR ASSOCIATES
                                      LIMITED PARTNERSHIP,
                                      a Maryland limited partnership

                                      By: THE ANASTASI STEPHENS GROUP, INC.


/s/ Cindi R. Caplan                   /s/ Joseph Anastasi
- -------------------                   -------------------


WITNESS:                              LESSEE:


                                      BIO SCIENCE CONTRACT PRODUCTION CORP.
                                      a Maryland corporation

/s/ Cindi R. Caplan                   /s/ Jacques R. Rubin, President
- -------------------                   -------------------------------


                                      -55-
<PAGE>



                              EXHIBIT "B" (PART II)

                                 LEASE ADDENDUM
                                 --------------

                                  (PARK PLACE)


         THIS  LEASE  ADDENDUM  made  as of the 12 day  of  November,  1991,  is
attached  to and made  part of that  certain  Lease of even date  herewith  (the
"Lease")  by and  between  MUIRKIRK  MANOR  ASSOCIATES  LIMITED  PARTNERSHIP,  a
Maryland limited  partnership  ("Lessor"),  and Bio Science Contract  Production
Corp., a Maryland corporation ("Lessee").

                              W I T N E S S E T H:
                              - - - - - - - - - - 

         WHEREAS,  Lessor and Lessee  have  agreed to amend,  supplement  and/or
modify  the  Lease as herein  provided,  Landlord  and  Tenant  hereby  agree as
follows:

         2.   TERM - OPTION
              -------------

         Lessee, at its option,  shall have the right to extend the Term of this
Lease on the same terms and conditions,  as the original term thereof, except as
otherwise  provided in this Addendum with respect to the amount of Base Rent due
during the respective extension period, for Two (2) additional  consecutive term
of Five (5) years (the "Extension  Period"),  subject to the satisfaction of the
following conditions:

         (i) Lessee's option to extend the Lease for the Extension  Period shall
be exercisable  only by written notice to Lessor at least ninety (90) days prior
to the commencement date of the Extension Period. If Lessee does not give Lessor
written  notice as  aforesaid,  Lessee shall be deemed to have not exercised its
respective extension option.

         (ii) At the time of exercise of the option and at the  commencement  of
the Extension Period,  Lessee shall not be in default under the Lease beyond any
applicable grace period.

         (iii) Upon  exercising  the  option,  the Base Rent will be the product
obtained by multiplying the Base Rent for the  immediately  preceding Lease Year
by one hundred four percent (104%).


                                      -56-
<PAGE>


              LESSEE IMPROVEMENTS
              -------------------

              (a)  Lessor has agreed to construct and complete the  installation
of lessee  improvements,  as set forth in  Exhibit  "B" to the  Lease,  within a
budget of one hundred and twenty  thousand and 00/100  ($120,000.00)  toward the
improvements requested by the lessee and it is agreed that the demising wall and
 .60 per S.F.  for design is part of the above  allowance.  It is agreed that all
plans,  specifications,  the General Contractor and its sub contractors, as well
as their  work  schedule,  will be  approved  by the  lessor  or its  Architect.
Payments to the General  Contractor will be made in accordance with the schedule
and method established by the lessor and its lender.

              (b)  In the event that the cost of constructing and installing the
lessee improvements to the Leased Premises exceeds the $120,000.00, lessee shall
pay directly to the General  Contractor the difference  between the cost and the
allowance.

              (c)  It is  further agreed  that  the  Lessee  accepts  Suite  280
(formerly  occupied by Homes Oil) in as is condition and the above  allowance in
(a) will be used for improvements, if any, in that suite.

         IN WITNESS  WHEREOF,  the parties have executed this Lease  Addendum on
the day and year first above written.



ATTEST:                             LESSOR:

                                    MUIRKIRK MANOR ASSOCIATES LIMITED
                                    PARTNERSHIP,
                                     A Maryland limited partnership

                                    By:  THE ANASTASI STEPHENS GROUP, INC.,
                                         its general partner



/s/ Cindi R. Caplan                 By:  /s/ Joseph Anastasi
- -------------------                      -------------------



                                    LESSEE:

                                    BIO SCIENCE CONTRACT PRODUCTION CORP.
                                    a MARYLAND corporation


/s/ Cindi R. Caplan                 By:  /s/ Jacques R. Rubin, President
- -------------------                      -------------------------------


                                      -57-
<PAGE>


                                   EXHIBIT "C"

                                   THIRD LEASE
                                   -----------


                                      LEASE
                                      -----

                                  (PARK PLACE)


         THIS  LEASE,  made as of this 20th day of March,  1992,  by and between
MUIRKIRK MANOR ASSOCIATES LIMITED  PARTNERSHIP,  a Maryland Limited  partnership
("Lessor"),  and BIO SCIENCE CONTRACT  PRODUCTION CORP., a Maryland  corporation
("Lessee").

                              W I T N E S S E T H:
                              - - - - - - - - - -

         That in  consideration  of the rent and mutual covenants and agreements
contained  herein,  and intending to be legally bound hereby,  Lessor and Lessee
agree as follows:

         1.   DEMISED PREMISES
              ----------------

              The  Lessor  leases  to the  Lessee  all  of  that  certain  space
described as Suite No. 260, 9000 Virginia Manor Road,  containing  approximately
8,100  square  feet of gross  leasable  area,  as is outlined in red on the plat
attached  to and  made a  part  of  this  Lease  as  Exhibit  "A"  (the  "Leased
Premises"),  and located in Park Place, Prince George's County, Maryland. Lessor
shall  construct and complete the Leased  Premises in compliance  with the plans
and  specifications  set forth in  Exhibit  "B"  attached  hereto  and made part
hereof.  "Delivery  of  Possession"  of the Leased  Premises by Lessor to Lessee
shall be deemed to have been made when Lessor's  architect  certifies in writing
that construction of the Leased Premises shall have been completed.

         2.   TERM
              ----

              The term (the  "Term") of this Lease  shall be for a term of Eight
(8) years,  eleven (11) months,  commencing on the 1sT day of April,  1992, (the
"Commencement Date") and shall expire on the last day of February,  2001. If the
Term of the Lease does not begin on the date specified  herein for reasons other
than the  fault of  Lessee,  then the  expiration  date  shall be moved  for the
commensurate amount of the delay and the rent shall be prorated accordingly.  If
the term  commences  or ends in  mid-month,  the  rent  payable  for that  month
(including,  without limitation,  Additional Rent) shall be prorated and paid on
the date of commencement or termination.


                                      -58-
<PAGE>



         3.   RENT
              ----

              (a)  The rent (the "Base Rent") shall be:

                      Year                Square Foot Rate
                      ----                ----------------

                        1                     $  9.50
                        2                     $  9.53
                        3                     $ 10.18
                        4                     $ 10.53
                        5                     $ 10.90
                        6                     $ 11.28
                        7                     $ 11.68
                        8                     $ 12.09
                        9                     $ 12.51


The term "Lease Year" shall mean each twelve (12) month  period  during the term
of this  Lease  commencing  on the  Commencement  Date.  The Base Rent  shall be
payable,  in  advance,  in  equal  monthly   installments,   the  first  monthly
installment to be due and payable on the  Commencement  Date and each subsequent
monthly  installment  to be due and  payable  on the first day of each and every
month thereafter during the term of this Lease.

              (b)  All moneys  payable by Lessee  under the terms of this Lease,
other than Base Rent, as adjusted from time to time, shall be deemed "Additional
Rent."

              (c)  Lessee  shall make all  payments of Base Rent and  Additional
Rent on a  timely  basis,  without  demand  and  without  deduction,  setoff  or
counterclaim,  except as  expressly  permitted in Paragraph  29(b)  hereof.  All
payments  of Rent and  Additional  Rent  shall be made by good and valid  check,
payable to The Anastasi  Stephens Group,  Inc., agent, 9000 Virginia Manor Road,
Suite 201,  Beltsville,  Maryland 20705, or to such other party or to such other
address as Lessor may designate  from time to time by written  notice to Lessee.
If Lessor shall at any time or times accept Base Rent or  Additional  Rent after
it shall become due and  payable,  such  acceptance  shall not excuse delay upon
subsequent occasions,  or constitute,  or be construed as, a waive of any or all
of Lessor's rights hereunder.  If any payment of Base Rent or Additional Rent is
not made within ten (10) days of when due, a late charge of five percent (5%) of
the amount of such payment shall be imposed, Lessor shall be entitled to require
the payment of Base Rent and Additional Rent by certified check if the check for
any payment by Lessee shall be dishonored by its Bank.

              (d)  Except  for the  obligations  of Lessor  expressly  set forth
herein,  this  Lease is a "net  lease" and Lessor  shall  receive  the Base Rent
hereinabove  provided as net income from the Leased Premises,  not diminished by
any  imposition  of any expenses or charges  required to be paid to maintain and
carry the Leased  Premises or to continue the  ownership  of Lessor,  other than
payments  under any mortgages now existing or hereafter  created by Lessor,  and
Lessor is not and shall not be  required  to render any  services of any kind to
Lessee.


                                      -59-
<PAGE>



         4.   SECURITY DEPOSIT
              ----------------

              (a)  Lessee has,  simultaneously with the execution of this Lease,
deposited  with Lessor,  in cash or by check subject to  collection,  the sum of
eight  thousand  ($8,000.00).  Said  deposit  shall be held as security  for the
faithful  performance  by  Lessee  of  the  terms,  covenants,   provisions  and
conditions  of this  Lease.  It is agreed that in the event  Lessee  defaults in
respect to any of the terms, covenants, provisions and conditions of this Lease,
including (but not limited to) the payment of Base Rent or Additional  Rent, and
fails to cure any such defaults within applicable grace periods, Lessor may use,
apply or  appropriate  the whole or any part of the security so deposited to the
extent  required for the payment of any Base Rent or Additional  Rent or for the
curing of any  defaults by Lessee  hereunder  pursuant to  Paragraph  29 hereof;
provided,  however,  that no such  use,  application,  or  appropriation  of the
deposit shall be deemed to relieve  Lessee of any breach of this Lease and shall
be in addition to other remedies under this Lease.

              (b)  Should  the  entire   deposit  or  any  portion   thereof  be
appropriated and applied by Lessor under the foregoing  provisions,  then Lessee
shall (upon the written demand of Lessor) forthwith remit to Lessor a sufficient
amount in cash to restore  said  security to the  original  sum  deposited,  and
Lessee's  failure  to do so within ten (10) days  after  receipt of such  demand
shall itself constitute an event of default under this Lease.

              (c)  The security deposit (less any amounts applied as provided in
subsection  (a) above) shall be returned to Lessee within thirty (30) days after
the date  fixed as the end of the Term of this  Lease  and  delivery  of  entire
possession of the Leased Premises to Lessor.

              (d)  In the event of a sale, leasing or other transfer of the land
and building of which the Leased  Premises  forms a part,  Lessor shall have the
right to transfer the security and be released by Lessee from all  liability for
the return of such security deposit.  Lessee shall look to the new Lessor solely
for the return of said  deposit.  The  provisions of this  Paragraph  4(d) shall
apply to every  transfer or  assignment  made of the  security  deposit to a new
Lessor.

              (e)  Lessee  covenants  that it will not  assign  or  encumber  or
attempt to assign to encumber  the  security  deposited  herein and that neither
Lessor  nor its  successors  or assigns  shall be bound by any such  assignment,
encumbrance, attempted assignment or attempted encumbrance.

              (f)  Lessee  shall not be entitled to any interest on the security
deposit, and such funds need not be segregated or held as escrow by Lessor.


                                      -60-
<PAGE>



              (g)  It is expressly  understood  and agreed that, in the event of
any  termination  of this  Lease or  re-entry  upon or  reletting  of the Leased
Premises on account of any default on the part of Lessee under this Lease, then,
and in such event, the deposit shall be retained and be subject to appropriation
by Lessor  until this  Lease  would,  by its terms,  have  expired  absent  such
default.

         5.   USE
              ---

              Lessee  will use and  occupy the  Leased  Premises  solely for the
purpose of Offices and operation of a vaccine research and production  facility.
The Leased  Premises  may not be used for any other  purpose  without  the prior
written consent of Lessor, which consent shall not be unreasonably withheld. The
Leased  Premises shall not be used for the storage,  distribution or sale of any
pornographic  or  "adult  rated"  materials.  Lessee  shall  not use the  Leased
Premises for any purpose or activity which is noxious or unreasonably  offensive
because of the emission of noise, smoke, dust,  vibration or odors. Tenant shall
not use the plumbing  facilities for any purpose injurious to same or dispose of
any  garbage or any other  foreign  substance  therein,  nor place a load on any
floor in the Leased  Premises  exceeding  the floor load of 250 per square  foot
which such floor was designed to carry, nor install,  operate and/or maintain in
the Leased  Premises and heavy  equipment  which could cause injury to the Lease
Premises,  nor  install,  operate  and/or  maintain in the Leased  Premises  any
electrical  equipment which will overload the electrical system therein,  or any
part hereof,  beyond its capacity for proper and safe operation as determined by
the Lessor or which does not bear underwriter's  approval.  Lessee shall not use
the Leased  Premises in any manner or for any purpose  which  violates any rule,
regulation, law, ordinance, or requirements of any governmental agency.

         6.   TAXES
              -----

              (a)  As  additional  rent  hereunder,  at least  thirty  (30) days
before  any fine,  penalty  or  interest  or cost may be added  thereto  for the
non-payment  thereof (or sooner if elsewhere herein required),  Lessee shall pay
throughout  the term of this Lease all  levies,  taxes,  assessments,  water and
sewer  rents and  charges,  liens,  charges for public  utilities  and all other
charges,  imposts  or burdens of  whatsoever  kind and nature  which at any time
during the term of this Lease may be assessed or imposed by any  federal,  state
or  municipal  government  or  public  authority,  or under  any law,  ordinance
regulation  thereof or pursuant to any recorded  covenants or agreements (all of
which are hereinafter referred to as "Impositions"), upon or with respect to the
Leased Premises,  any improvements  made thereto,  or this Lease.  Additionally,
Lessee shall pay a  proportionate  share of any Imposition  which is not imposed
upon the Leased Premises as a separate entity but which is imposed upon the land
or the  building  or upon the  appurtenances,  leases,  rents,  transactions  or
documents  relating  to the lot or the  building.  Provided,  however,  that any
Imposition  shall be apportioned for the first and last fiscal tax years covered
by the term hereof.  "Impositions" shall include, but not be limited to, any and
all governmental or  quasi-governmental  levies,  fees,  assessments,  taxes and
charges,  general  and  special,   ordinary  and  extraordinary,   foreseen  and
unforeseen,  of any kind and nature  whatsoever,  with  respect to such land and
building  (excluding  taxes paid on Lessor's  income but including  sales tax or
excise tax imposed by any  governmental  authority upon the Base Rent payable by
Lessee hereunder).


                                      -61-
<PAGE>


              (b)  Notwithstanding  the foregoing  provisions of this Article 6,
Lessor shall have the right,  at its option,  to require Lessee to pay to Lessor
or to any  mortgagee,  at the time when the monthly  installment of Base Rent is
payable,  an amount equal to  one-twelfth  (1/12) of the annual  impositions  as
estimated by Lessor. If Lessor elects to have Lessee make such payments,  Lessee
also  shall  pay to Lessor  or to such  mortgagee,  as the case may be, at least
thirty (30) days before any fine, penalty, interest or cost may be added thereto
for the non-payment  thereof,  the amount by which the impositions  becoming due
exceed the monthly  installment  payments on account thereof  previously made by
Lessee.  Should  Lessee's  monthly  installment  payments on account of Lessee's
share of impositions for any tax year exceed the actual amount of Lessee's share
of such  impositions,  the excess  amount  shall be  credited  against  Lessee's
installments for impositions thereafter becoming due. The amounts paid by Lessee
pursuant to this  paragraph (b) shall be used to pay the  impositions,  but such
amounts  shall not be deemed to be trust funds and no interest  shall be payable
thereon.

              (c)  During any part of the Term of this Lease which shall be less
than a full tax  fiscal  year,  any Taxes  shall be pro  rated on a daily  basis
between  the  parties,  to the end that Lessee only shall pay its share of Taxes
attributable to the portion of the tax fiscal years occurring within the term of
this Lease.

              (d)  Lessee shall pay  promptly,  and when due,  all taxes,  fees,
licenses,  assessments  and other charges levied or imposed upon the business of
the  Tenant  or upon  any  fixtures,  furnishings  or  equipment  in the  Leased
Premises.

              (e)  If due to a future change in the method of taxation or in the
taxing authority,  a franchise,  gross receipts,  transit,  rent or other tax or
other  governmental  imposition,  however  designated,  shall be levied  against
Lessor in  substitution  (in whole or in part)  for,  or in  addition  to,  said
"Impositions"  as  currently  defined),  then such  franchise,  gross  receipts,
transit,  rent or other tax or  governmental  impositions  shall be deemed to be
included within the definition of "Impositions"  for the purposes of this Lease.
The term  "Impositions"  also  includes  all costs  reasonably  incurred  in any
proceeding brought by Lessor to reduce said Taxes.

              (f)  Lessor may  institute  any  proceedings  with  respect to the
assessed valuation of Park Place or any part thereof, and Lessee shall cooperate
with, and participate in, any and all such  proceedings.  If, after Lessee shall
have made the required payment of Taxes hereunder, Lessor shall receive a refund
of any portion thereof,  then, within thirty (30) days after Lessor's receipt of
such refund, Lessor shall pay to Lessee Lessee's pro rata share of the amount of
the  refund,  less all  costs  and  expenses  (including,  but not  limited  to,
attorneys' and appraiser'  fees) expended for incurred in obtaining such refund.
Lessee may not institute any proceedings with respect to the assessed  valuation
of Park Place or any part thereof.


                                      -62-
<PAGE>



         7.   UTILITIES
              ---------

              Starting with the Commencement Date and continuing  throughout the
Term of the Lease,  Lessee shall be solely responsible for and shall pay, as and
when the same  become due and payable and as  hereinafter  provided,  all rents,
rates, costs and charges for water services,  sewer service,  electricity,  gas,
heat, steam, power, telephone (and other communication  services), and any other
utilities or services  rendered or supplied to, upon or in  connection  with, or
used or consumed  within or in  servicing,  the Leased  Premises,  and all other
utility costs and expenses involved in the use of the Leased Premises throughout
the term of this  Lease,  and Lessee  shall  indemnify  Lessor  and save  Lessor
harmless  against  any  costs  liability  or  damages  on such  account.  Unless
otherwise  agreed in writing by Lessor or Lessee,  Lessee  shall,  promptly upon
Delivery of Possession of the Leased  Premises and at Lessee's own expense,  pay
for the  installation of separate meters for all utilities  servicing the Leased
Premises  and place said meters and  related  utility  accounts in Lessee's  own
name.  Lessee shall pay all separately  metered charges to the respective public
utility companies.  With respect to each utility which is not separately metered
for the Leased Premises,  Lessee shall pay Lessor, as Additional Rent,  Lessee's
proportionate  share of the total cost and fees therefore  attributable to those
areas of the warehouse/office buildings which are not separately metered.

         8.   COMMON AREA MAINTENANCE
              -----------------------
               
              (a)  Subject to the  provisions  of this Lease,  Lessor  grants to
Lessee, its employees, agents, customers and invitees during the Term hereof the
non-exclusive use, in common with Lessor and other tenants and occupants of Park
Place and their  respective  employees,  agents,  customers  and invitees and in
common  with such  others  as Lessor  may  designate  from time to time,  of all
non-allocated  parking  areas  within Park Place for  pedestrian  and  vehicular
ingress and egress and the accommodation and parking areas within Park Place for
pedestrian and vehicular  ingress and egress and the  accommodation  and parking
automobiles as required by the Lessee in conducting  normal business  activities
of Lessee within the Leased  Premises.  Lessor reserves the right,  however,  to
designate certain portions of the parking areas within Park Place for parking of
trucks,  vans, and other vehicles,  and to designate for the specific account of
Lessee,  or other  tenants  in Park  Place,  specific  parking  areas or  spaces
constructed with Park Place. Notwithstanding anything contained in this Lease to
the contrary, Lessor shall have the right, at any time and from time to time, to
change the size, location and nature of the parking areas (so long as the number
of parking  spaces is not reduced)  and/or other common areas within Park Place.
All parking areas and related  facilities which may be furnished by Lessor in or
near the Leased Premises,  including  employee parking areas, truck way or ways,
loading docks, pedestrian sidewalks and ramps, landscaped areas, and other areas
and improvements  which may be provided by Lessor for the general use, in common
with Lessor and other tenants, and their respective employees, agents, customers


                                      -63-
<PAGE>



and  invitees,  shall  at all  time be  subject  to the  exclusive  control  and
management  of Lessor,  and Lessor shall have the right,  from time to time,  to
establish,  modify and enforce  reasonable rules and regulations with respect to
all parking areas and other  facilities and areas  mentioned in this  paragraph.
Lessee agrees to abide by and conform with all such rules and  regulations  upon
notice thereof and to cause its employees,  agents, customers and invitees to do
the same.  Lessor shall have no liability to Lessee for use of the parking areas
by Lessor or other  tenants  and  occupants  of Park Place and their  respective
employees, agents, customers, or other third parties. No provision of this Lease
shall be  construed  as a demise to Lessee of the  parking  or any other  common
area) within Park Place.  If any repairs  (excluding  repairs caused by Lessee's
normal  use) to the  parking  or  other  common  areas  within  Park  Place  are
necessitated  by reason  of any act or  omission  by  Lessee  or its  employees,
agents, customers or invitees, then, if Lessor chooses to do so, Lessor may make
such repairs and Lessee shall promptly upon demand reimburse Lessor for the full
costs to the extent same are not covered by Lessor's  insurance,  or at Lessor's
option,  Lessor may notify Lessee of the necessity for such repairs, and Lessee,
at its cost and expense,  shall,  with due  diligence,  commence and complete to
Lessor's  satisfaction  the repairs within ten (10) days of Lessee's  receipt of
such notice.

              (b)  "Common  Area  Charges"  means all of the costs and  expenses
which are incurred by Lessor with respect to operation, management,  maintenance
and security of the building  including the parking and other designated  common
areas in Park Place and the exterior  walls of the buildings in Park Place,  and
those areas of Park Place which house mechanical,  electrical or other equipment
or are otherwise  determined from time to time by Lessor to be used in operating
or maintaining Park Place.  "Common Area Charges"  include,  but are not limited
to,  the cost of  maintaining,  repairing,  and  replacing  and  repaving  (when
necessary) the parking and other designated  common areas;  supplies,  tools and
materials  purchased and/or used in connection with repairs,  maintenance and/or
replacements;  wages,  salaries,  and fringe  benefits of all  employees  of the
Lessor for the  portion  of time they are  directly  engaged  in the  operation,
maintenance  and  security  of Park  Place,  including  license  and  fees  (but
excluding wages, salaries and benefits of executive  employees);  removing snow,
ice,  and debris from the  roadways  and parking  areas for  Lessee's use during
normal  business hours;  removal of customary and normal trash;  maintaining and
repairing or repainting (when necessary)  directional signs,  pavement markings,
and parking lot  striping;  repairing  and replacing  (when  necessary)  outdoor
lighting  facilities;  maintaining  the  grass  and  otherwise  caring  for  the
replanting (when  necessary) all shrubbery and landscape  areas;  providing such
security as Lessor,  in its sole  discretion,  deems  advisable;  accounting and
legal fees for common areas at Park Place; utilities,  heating,  ventilation and
air-conditioning charges allocable to designated common areas and other building
service areas.


                                      -64-
<PAGE>



              (c)  Starting with the Commencement Date and continuing throughout
the Terms of this  Lease,  Lessee  shall pay Lessor in  advance  as  hereinafter
described and as Additional  Rent,  Lessee's  Pro-Rata  Share of all Common Area
Charges for said period.  "Lessee's  Pro-Rata  Share"  shall be a fraction,  the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within all buildings in Park
Place. The Initial Lessee's Pro-Rata Share shall be 4.50%. 

         The  Company  is, and from time to time  becomes,  involved  in various
claims and lawsuits that are  incidental to its business.  In the opinion of the
Company's  management,  there are no material legal proceedings  pending against
the Company.

              (d)  On or before the  Commencement  Date, on or before the end of
each and every Lease year,  and at such other time(s) as is deemed  desirable by
lessor in its sole  discretion,  Lessor  shall  forward to Lessee a "Common Area
Charges  Statement",  which shall contain Lessor's latest estimate of the Common
Area  Charges  for the then  current or the then  upcoming  (as the case may be)
Lease Year,  and a statement  of Lessee's  Pro-Rata  Share  thereof.  Landlord's
failure to forward,  or to timely  forward,  any Common Area  Charges  Statement
shall not excuse Lessee from its liability for Lessee's Pro-Rata Share of Common
Area Charges.

              (e)  Each  month  during the Term of this  Lease,  along with each
monthly  installment of Base Rent,  beginning with the Commencement Date, Lessee
shall pay to Lessor,  in advance,  an amount  equal to  one-twelfth  (1/12th) of
Lessee's  Pro-Rata  Share of the  Common  Area  Charges as set forth in the then
latest Statement.  If the Commencement Date is a day other than the first day of
a calendar month, then the amount of Common Area Charges due for the first month
and the last month of the Term shall be pro rated on the basis of a thirty  (30)
day month. As soon as practicable near the end of each and every Lease Year, but
no later than 90 days after the end of the Lease year,  Lessor  shall  submit to
Lessee an "Actual Common Area Charges Statement" prepared by Lessor showing that
the Common Area Charges for the then preceding  Lease Year actually  were.  With
the next monthly  installment  of Base Rent due after  Lessee's  receipt of such
Statement,  Lessee shall pay Lessor or Lessor shall credit  Lessee,  as the case
may be the difference  between Lessee's Pro-Rata Share of the actual Common Area
Charges  for said  Lease  Year as shown on said  Statement  and the total of all
Common Area Charges paid by Lessee to Lessor for said Lease Year.

         9.   NON-LIABILITY OF LESSOR
              -----------------------

              (a)  Except  as  otherwise  expressly  provided  in this  Lease or
unless caused by the negligence or intentional  misconduct of Lessor or Lessor's
employees,  agents  and  contractors  while  acting  within  the  scope of their


                                      -65-
<PAGE>



employment,  Lessor shall not be responsible or liable to Lessee for any loss or
damage to persons or property,  or any  interference or interruption of Lessee's
use of the Leased  Premises,  that may be occasioned by (i) water,  gas,  steam,
wind or the bursting, stoppage or leaking of any pipes, sewer or water lines, or
other  conduits,  fixtures or equipment;  (ii) the  interruption  of any utility
services  to the  Leased  Premises  caused  by the  utility  company;  (iii) any
repairs,  alterations,  maintenance or additions to the Leased  Premises or land
and  building of which they are a part;  (iv) any  casualty;  (v) theft or other
criminal  conduct;  or (vi) the acts or omissions of persons occupying any space
adjacent to the Leased Premises.

              (b)  No provisions of this  Lease  shall be deemed to confer  any
rights  upon any  persons  or  entities  other than the  parties to this  Lease,
permitted successors and assigns and mortgages.

              (c)  Notwithstanding  anything  to the  contrary  provided in this
Lease, it is  specifically  understood and agreed that there shall be absolutely
no personal  liability on the part of Lessor,  including  partners in Lessor and
their  respective  successors  and assigns,  with respect to its  performance or
observance of any of the terms, covenants and conditions of this Lease, and that
Lessee shall look solely to the equity of the Lessor in the land and building of
which the Leased  Premises  form a part for the  satisfaction  of each and every
remedy  of Lessee  in the  event of any  breach  by Lessor of any of the  terms,
covenants  and  conditions  of this Lease to be performed or observed by Lessor,
such exculpation of personal  liability to be absolute and without any exception
whatsoever.

              (d)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations under this Lease,  Lessee may seek and enforce specific  performance
of the Lease against Lessor and pursue such other  equitable  remedies as may be
available to Lessee.  Notwithstanding  the foregoing,  the result of such action
shall be subject to the provisions of Paragraph 9(c) hereof.

         10.  INDEMNITY
              ---------

              Lessee  agrees to  indemnify  and save  Lessor  harmless  from and
against any and all claims,  demands,  costs and  expenses  (including,  but not
limited  to,  reasonable  attorneys'  fees  and  litigation  costs)  for,  or in


                                      -66-
<PAGE>



connection  with,  any  accident,  injury or damage  whatsoever to any person or
property (i) arising directly or indirectly out of Lessee's use of occupation of
the Leased  Premises,  (ii) occurring in, on or about the Leased  Premises or on
the sidewalks  adjoining the same, or (iii) arising  directly or indirectly from
any act or  omission of Lessee or any of Lessee's  licenses,  servants,  agents,
employees or  contractors.  The foregoing  indemnity shall not apply to any such
claim or demand proximately caused by the negligence or misconduct of Lessor, or
its  employees,  agents and  contractors  while acting within the scope of their
employment.

         11.  LIABILITY INSURANCE
              -------------------

              (a)  Lessee,  at Lessee's sole expense,  shall obtain and maintain
in  effect at all  times  starting  with the  Commencement  Date and  continuing
throughout the term of the Lease, a policy or policies of comprehensive  general
public liability insurance,  insuring Lessor,  Lessor's  mortgagee(s) and Lessee
against any liability for injury, death or property damage occurring upon, in or
about any part of the Leased Premises or any  appurtenances  thereto,  affording
protection  to the limits of not less than One Million  Dollars  ($1,000,000.00)
with  respect  to bodily  injury or death of any one  person,  and not less than
Three Million Dollars  ($3,000,000.00) with respect to any one incident, and not
less than Five Hundred Thousand Dollars  ($500,000.00)  with respect to property
damage.  The foregoing  minimum  limits may, at Lessor's  option and upon thirty
(30) days' notice to Lessee, be increased from time to time to reflect inflation
or changed conditions.

              (b)  The insurance  policy(ies)  required to be procured by Lessee
under this Lease:

                  (i)    Shall  be  issued  by  a  reputable  insurance  company
licensed to do  business  in the State of Maryland  and shall have such form and
content as shall be approved by Lessor.

                  (ii)   Shall be  written as primary  policy  coverage  and not
contributing with, or in excess of, any coverage which Lessor may carry.

                  (iii)  Shall have an endorsement thereto to the effect that no
act or  omission by Lessee  shall  affect the  obligation  of the insurer to pay
Lessor the full  amount of any loss  sustained  by Lessor  and shall  contain an
express  waiver of any right of  subrogation  by the insurance  company  against
Lessor, its agents and employees.

                   (iv)  Shall name Lessor as an additional named insured.

              (c)  On or before the Commencement Date, and at least fifteen (15)
days before the expiration date of the policy,  Lessee shall deliver to Lessor a
certificate  of insurance  evidencing  the  existence  and good  standing of the
liability  policy  referred to in Paragraph  11(a),  together  with  evidence of
payment of all premiums.  The insurance  required to be carried under this Lease
may be carried  under a blanket  policy  covering the Leased  Premises and other
locations of Lessee. The insurance policy required to be carried by Lessee shall
provide  that such  insurance  policy  shall not be canceled  unless  Lessor and


                                      -67-
<PAGE>




Lessor's  mortgage(s) shall have received thirty (30) days' prior written notice
of cancellation.  In the event that Lessee shall,  prior to the thirtieth (30th)
day  before  any  insurance  policy  will  lapse or  terminate,  fail to furnish
evidence of the coverage and pay the premium therefor for a period not exceeding
one year,  and the  premiums  so paid by Lessor  shall be payable by Lessee,  on
demand, as Additional Rent.

         12.  HAZARD INSURANCE
              ----------------

              (a)  Starting with the Commencement Date and continuing throughout
the Term of this  Lease,  Lessee  shall pay to Lessor,  or such  other  party as
Lessor shall designate by written notice to Lessee, as Additional Rent, Lessee's
Pro-Rata Share, as defined in Paragraph 12(e) hereof,  of the premiums and other
charges (the "Premiums") that may be incurred or contracted for or by Lessor for
fire and casualty  insurance  coverage  for the land and  buildings of which the
Leased  Premises form a part,  including  protection  from such perils as may be
insured against under a broad form extended coverage  endorsement or on all risk
of physical loss policy,  and further  including  loss of rental  coverage in an
amount equal to the Rent for one (1) Lease Year.  The premiums for all insurance
to be  obtained  by  Lessor  under  this  Paragraph  12(a)  shall be  reasonably
competitive  with the  premiums  charged for  similar  insurance  protection  by
reputable  insurers for  comparable  properties.  Lessee agrees that it will not
store  gasoline or other  explosive,  flammable or toxic  material in the Leased
Premises or do anything which may cause Lessor's  insurance  company to void the
policy covering the Leased Premises or to increase the premium thereon, and that
Lessee will  immediately  conform to all rules and regulations from time to time
made or established by Lessor's  insurance  company or insurance  rating bureau.
Lessor will do everything reasonably possible and consistent with the conduct of
Lessee's  business  to obtain the lowest  possible  rates for  insurance  on the
Leased Premises.  If, however,  the cost to Lessor of obtaining insurance on the
Leased  Premises  (or the  building  which the Leased  Premises  are located) is
increased  due to the  Lessee's  occupancy  thereof,  and the  Lessor's  insurer
provides evidence that said increase is the direct cause of Lessee's  occupancy,
Lessee agrees to pay,  promptly  upon demand,  as  additional  rental,  any such
increase.

              (b)  On or before the Commencement Date and before the due date of
each and  every  bill for the  Premiums,  Lessor  shall  forward  to  Lessee  an
"Insurance  Statement" which shall contain an estimated  statement of the amount
due from Lessee from time to time as Lessee's  Pro-Rata  Share of the  Premiums.
Lessor's failure to forward, or to timely forward, any Insurance Statement shall
not  excuse  Lessee  from  its  liability  for  Lessee's  Pro-Rata  Share of the
Premiums.


                                      -68-
<PAGE>



              (c)  Each and every  month  during the Term of this  Lease,  along
with its monthly installment of Fixed Rent,  beginning on the Commencement Date,
Lessee  shall pay  Lessor  an amount  equal to  one-twelfth  (1/12) of  Lessee's
Pro-Rata  Share  of the  Premiums  as set  forth in the  then  latest  Insurance
Statement,  which  shall  be  credited  toward  Lessee's  Pro-Rata  Share of the
Premiums when the same are due and payable.  Should Lessee's monthly installment
payments on account of Lessee's Pro-Rata Share of the Premiums for the period to
which the Premiums relate exceed the actual amount of Lessee's Pro Rata Share of
such Premiums, the excess amount shall be credited against Lessee's installments
for Premiums thereafter becoming due. If the Commencement Date is other than the
first day of a period to which the Premiums relate, then the installments of the
Premiums  due from the Lessee  shall be pro rated on the basis of a thirty  (30)
day month.

              (d)  Notwithstanding  the  provisions  of  Paragraph  12(c) above,
Lessor may, upon ten (10) days' written notice to Lessee,  require Lessee to pay
Lessee's  Pro- Rata Share of the  necessary  increased  Premiums due to Lessee's
occupancy at such times as the  Premiums  are due and payable to the  respective
insurance  company or companies or in such manner as is required of Lessor under
any mortgage, whether such payments be in lump sum or other installments.

              (e)  Lessee's  Pro-Rata  of  the  Premiums  shall  be of  all  the
Premiums due for the land and building of which the Leased Premises form a part.
As used in this Paragraph 12, "Lessee's Pro Rata Share" shall be a fraction, the
numerator  of which shall be the floor area within the Leased  Premises  and the
denominator  of which shall be the total floor area within the building of which
the Leased Premises form a part.

              (f)  Lessor  hereby   releases   Lessee  from  any  liability  and
responsibility  to Lessor to anyone  claiming  through or under Lessor by way of
subrogation or otherwise,  for any and all loss or damage to the Leased Premises
caused by fire or any  casualty  covered by  insurance  to the extent  insurance
proceeds are received  therefor,  even if such fire or other casualty shall have
been caused by the fault or negligence of Lessee,  or anyone for whom Lessee may
have been responsible.  Lessor's  insurance  policies shall include  appropriate
clauses (i) waiving all rights of  subrogation  against  Lessee with  respect to
losses payable under such  policies,  and (ii) agreeing that such policies shall
not be  invalidated  should the insured waive in writing prior to a loss any and
all rights of recovery against the other party hereto for losses covered by such
policies.

         13.  DAMAGE TO THE DEMISED PREMISES
              ------------------------------

              (a)  In the event of partial or total damage or destruction of the
Leased  Premises  by fire,  other  casualty,  or any  cause  whatsoever  (except
condemnation),  Lessee shall give immediate  notice to Lessor.  If the damage or


                                      -69-
<PAGE>


destruction  is insured  against by Lessor,  this Lease  shall  continue in full
force and effect,  and, to the extent that insurance  proceeds  respecting  such
damage or  destruction  are  subject  to being  utilized  and,  in fact,  may be
utilized by Lessor for repair,  Lessor shall cause such damage or destruction to
be repaired with reasonable speed at the expense of Lessor,  except as otherwise
hereinafter  provided  in this  Paragraph  13. If in the  reasonable  opinion of
Lessor the damage or destruction  is such that repair thereof cannot  reasonably
be  completed  within  ninety  (90) days of the date the  damage or  destruction
occurs,  Lessor  shall have the right to  terminate  this Lease by the giving of
written  notice to such effect to Lessee  within thirty (30) days of the date of
Lessor's receipt of Lessee's notice of damage or destruction.  In no event shall
Lessor be  required  to restore or repair  Lessee's  personal  property or other
contents within the Leased Premises.  Due allowance shall be made for reasonable
delay which may arise by reason of Lessor's  adjustment of loss under  insurance
policies  and on account of labor  troubles or any other cause  beyond  Lessor's
control. To the extent that the Leased Premises are rendered  untenantable,  the
Rent  and  Additional  Rent  shall  proportionately  abate.  If  the  damage  or
destruction  is not covered by  insurance  maintained  by Lessor or if insurance
proceeds  respecting the damage or destruction are not subject to being utilized
for repair and, in fact, may be not so utilized, Lessor shall not be required to
repair the damage or  destruction.  In the event the damage or destruction is so
extensive to the  building of which the Leased  Premises are a part as to render
it uneconomical, in Lessor's opinion, to restore the Leased Premises, the Lease,
at the option of Lessor,  shall be terminated  upon written notice to Lessee and
Lessee shall immediately thereafter vacate the Leased Premises and surrender the
same to Lessor.  No such termination  shall release Lessee from any liability to
Lessor from any of the  obligations or duties imposed on Lessee under this Lease
prior  to the  damage.  Upon  any  termination  of this  Lease  pursuant  to his
Paragraph 13(a),  Rent and Additional Rent shall be prorated and adjusted to the
date of such termination.

              (b)  Lessee hereby  waives any and all right of recovery  which it
might  otherwise  have against  Lessor,  its agents and  employees,  for loss or
damage to Lessee's contents, furniture, furnishings, fixtures and other property
removable  by Lessee under the  provisions  of this Lease to the extent that the
same is to be covered by Lessee's insurance  thereunder,  except where such loss
or damage  may  result  from the  negligence  of fault of  Lessor,  its  agents,
employees or contractors.

         14.  EMINENT DOMAIN
              --------------

              (a)  If during the term of this  Lease,  the Leased  Premises,  or
such a substantial  portion of the Leased  Premises as shall prevent Lessee from
conducting its normal business, shall be taken by proper authority for public or


                                      -70-
<PAGE>



quasi-public  use, then Lessee may terminate this Lease by giving Lessor written
notice of  termination  within  thirty (30) days after  receipt of notice of the
taking,  and Lessee's  obligation  to pay rent,  taxes,  and other charges shall
terminate as of the date of the termination notice. If only a part of the Leased
Premises is taken and the part not taken shall be reasonably  sufficient for the
purpose of conducting Lessee's normal business,  this Lease shall remain in full
force  and  effect,   except  that  the  Rent  and  Additional   Rent  shall  be
proportionately reduced.

              (b)  All  compensation  awarded for any taking shall belong to and
be the property of Lessor. Nothing contained herein, however, shall be construed
to preclude Lessee from  prosecuting  any claim directly  against the condemning
authority  for loss of  business or  depreciation,  damage or cost of removal of
personal property  belonging to Lessee so long as the claim does not diminish or
otherwise  adversely  affect  Lessor's award or the award  otherwise  payable to
Lessor's mortgagee.

         15.  CONDITION OF LEASED PREMISES; MAINTENANCE AND REPAIR
              ----------------------------------------------------

              (a)  Except for the repairs that Lessor is specifically  obligated
to make  under  Paragraph  15(b)  hereof,  and  except  for  repairs  covered by
contractor  warranties held by Lessor for Lessor's  benefit,  during the term of
this Lease,  Lessee, at Lessee's sole cost and expense,  shall promptly make all
repairs,  perform all maintenance,  perform all custodial  services and make all
replacements  in and to the Lease  Premises  that are necessary in order to keep
the  Leased  Premises  in good  order and  repair  and in a safe and  tenantable
condition. Without limiting the generality of the foregoing, Lessee, at its sole
cost and expense,  is specifically  required to make promptly all repairs to (i)
any pipes,  water and waste lines,  ducts,  wires or conduits  beneath or in the
Leased  Premises  or within the ceiling of the Leased  Premises;  (ii) any glass
windows included within the Leased Premises;  (iii) Leasee's  sign(s);  (iv) any
electrical,  natural gas (if any),  heating,  ventilating and air  conditioning,
plumbing,  and other  systems,  equipment,  fixtures  and items  installed in or
servicing the Leased Premises; (v) the floors,  ceilings and walls of the Leased
Premises;  (vi) the entrance and exit and auxiliary driveways, if any, which are
part of and  service  the Leased  Premises;  and (vii) any portion of the Leased
Premises  damaged by Lessee's use or occupancy of the Leased  Premises or by any
act,  omission or  negligence  of Lessee,  or any of its  respective  employees,
agents, invitees,  licensees or contractors.  All repairs, and replacements made
by Lessee shall  utilize  materials  and  equipment  which are at least equal in
quality and usefulness to those originally used in the Leased Premises.  Lessee,
at Lessee's expense,  shall enter into one (1) or more service contracts for the
maintenance  of the  heating,  ventilating  and  air  conditioning  systems  and
equipment.  Lessee shall keep the Leased Premises free of all insects,  rodents,
vermin and pests of every type and kind. Lessee shall also,  promptly and at its
own expense,  keep any sidewalks and curbs adjacent to the Leased Premises clean
and free from snow,  ice,  dirt and rubbish.  Lessee  shall not  (directly or by
sufferance)  place any equipment,  materials or debris on the roof of the Leased
Premises, or cut, drive nails into or otherwise mutilate such roof.


                                      -71-
<PAGE>



              (b)  Lessor shall within  thirty (30) days (or such longer  period
of time as may  reasonably  be required  by Lessor)  after  written  notice from
Lessee with respect thereto,  make necessary  structural repairs to the exterior
walls  and  shall  keep  in  good  order,  condition  and  repair  the  exterior
foundations, downspouts, gutters and roof of the Leased Premises and the portion
of the  plumbing  and sewage  system  located  outside the building in which the
Leased  Premises  are located (it being  understood  and agreed that  Landlord's
obligations exclude the exterior and interior of all windows, doors, plate glass
and signs, and repairs  required by any casualty except as otherwise  covered by
Paragraph 13 herein). Lessee shall, upon demand, reimburse Lessor for reasonable
costs of making  any such  repairs or  replacements  caused by  Lessee's  use or
occupancy  of the Leased  Premises  or by any act,  omission  or  negligence  of
Lessee,   any  subtenant  or  concessionaire  of  Lessee,  or  their  respective
employees,  agents,  invitees,  licensees or contractors  (excluding  repairs or
replacements caused by Lessee's normal use).

              (c)  Lessee  hereby  covenants  to contain all  garbage,  rubbish,
waste,  trash and debris  generated  in  conjunction  with its use of the Leased
Premises in  containers  provided by Lessor (which shall be emptied no more than
three times per week, but at least once a week) so as not to constitute a safety
or fire hazard.

         16.  ALTERATIONS
              -----------

         Lessee  shall  not  make  any  non-structural   interior   alterations,
additions or improvements in or to the Leased Premises without the prior written
consent of Lessor in each  instance,  which  consent  shall not be  unreasonably
withheld  or  delayed.   Lessee  shall  not  take  any  structural  or  exterior
alterations,  additions or improvements to the Leased Premises without the prior
written  consent of Lessor.  Should Lessor fail to respond  within  fifteen (15)
working  days after  Lessor's  receipt of any  written  request  from Lessee for
Lessor's  consent  to  any  proposed  alterations,  additions  or  improvements,
Lessor's   consent  shall  be  deemed  to  have  been  granted.   All  permitted
alterations, additions and improvements made by Lessee shall be performed (i) in
a good and workmanlike  manner, (ii) in accordance with all applicable legal and
insurance  requirements,  (iii) only after receipt by Lessee and presentation to
Lessor of all necessary permits and licenses, and (iv) at Lessee's sole expense.
Except for Lessee's removable trade fixtures, and all improvement made by Tenant
in the processing and storage areas, all improvements,  repairs, alterations and
additions and all other non-trade  fixtures,  whether  installed before or after
the  execution  of this  Lease,  shall  remain  upon the Leased  Premises at the
expiration or sooner termination of this Lease and become the property of Lessor
without  payment  therefor by Lessor,  unless prior to the  termination  of this
Lease,  Lessor shall have given written  notice to Lessee to remove the same, in
which event Lessee, at its expense, will remove such alterations,  improvements,
additions  and/or  fixtures  and  repair and  restore  any and all damage to the
Leased Premises caused by the installation and/or removal thereof.


                                      -72-
<PAGE>



         17.  SIGNS
              -----

              Lessee may not install any sign  without  Lessor's  prior  written
consent.  All signs shall be in strict  compliance  with the sign  criteria  set
forth in Exhibit "C" attached hereto and made part hereof.  Lessee shall install
all exterior signs for the Leased Premises at the cost and expense of Lessee. No
sign, advertisement or notice shall be inscribed,  painted, affixed or otherwise
displayed on any part of the outside or the inside of the Leased Premises or the
building  of which the Leased  Premises  are a part,  unless  Lessor  shall have
approved the sign, advertisement,  or notice in writing prior to installation of
the same. If any sign,  advertisement,  or notice is exhibited by Lessee without
having first obtained Lessor's approval thereof,  Lessor shall have the right to
remove the same and Lessee shall be liable for any and all expenses  incurred by
Lessor in said  removal.  No signs made of paper and visible from outside of the
Leased Premises shall be allowed in the Leased Premises. No mobile sign, such as
may be affixed to the side of a truck or a trailer or a mobile platform shall be
permitted in the parking area.

         18.  LAWS AND INSURANCE STANDARDS
              ----------------------------

              Lessee shall,  at Lessee's sole expense,  promptly comply in every
respect with all  applicable  laws,  ordinances,  rules and  regulations  of all
federal,  state,  county, and municipal  governments now in force or that may be
enacted in the future,  all applicable  and  enforcement  directions,  rules and
regulations of the fire marshall,  health officer,  building  inspector or other
proper  officers  of  any  governmental  agency  having  jurisdiction,  and  the
applicable standards established from time to time by the National Board of Fire
Underwriters,  the National Fire Protective Association,  or any similar bodies.
Lessee expressly covenants and agrees to indemnify and save Lessor harmless from
any  penalties,  damages or charges  imposed for any violation of the foregoing.
Notwithstanding the foregoing,  Lessee shall not be required to make any changes
or modifications to the Leased Premises, unless (a) the same are required due to
Lessee's specific use and/or occupancy of the Leased Premises,  (b) the same are
required due to structural specifications (beyond building standard) required by
Lessee, or (c) the same relate to repairs, maintenance or other responsibilities
of Lessee under this Lease, e.g., Paragraph 15(a) hereof.

         19.  MECHANIC'S LIENS
              ----------------

              Lessee shall do all things  necessary to prevent the filing of any
mechanics' or other liens against the Leased Premises,  or the land the building
of which the Leased  Premises are part,  by reason of work,  labor,  services or
materials  supplied or claimed to have been supplied to Lessee or anyone holding
the Leased Premises,  through or under Lessee.  If any lien shall at any time be


                                      -73-
<PAGE>



filed,  Lessee shall either cause the lien to be discharged of record within ten
(10) days after knowledge of its filing or, if Lessee in its discretion and good
faith determines that the lien should be contested,  shall furnish such security
as may be necessary to prevent the filing of any foreclosure  proceedings during
the pendency of the contest.  If Lessee shall fail to discharge  any lien within
such period or fail to furnish  such  security,  then,  in addition to any other
right or remedy,  Lessor may, but shall not be obligated to,  discharge the same
either by paying the amount  claimed to be due or by procuring  the discharge of
lien by deposit in court or by giving  security or in such other manner as is or
may be  prescribed  by law.  Lessee  shall  repay to Lessor  on demand  all sums
disbursed or deposited by Lessor pursuant to the foregoing provisions, including
the  expenses  and  reasonable  attorneys'  fees  incurred  by  Lessor.  Nothing
contained  in this Lease shall imply that  Lessee has any  authority  or consent
from Lessor to subject Lessor's estate to any mechanics', materialman's or other
lien.

         20.  ASSIGNMENT AND SUBLETTING
              -------------------------

              (a)  Lessee shall not assign, mortgage or encumber any interest in
this Lease or sublet all or any part of the Leased  Premises  without  the prior
written consent of Lessor.  Lessor shall not unreasonably  withhold or delay its
consent to an assignment or subletting of this Lease.

              (b)  No  permitted   assignment  or  subletting   shall   release,
discharge or affect the liabilities of Lessee as provided for in this Lease, and
Lessee  shall  at all  times  remain  primarily  liable  under  this  Lease.  An
assignment  by operation of law shall be deemed a  prohibited  assignment  under
this Paragraph.

         21.  INSOLVENCY
              ----------

              Lessor may,  at its option,  declare  this Lessee  terminated  and
reenter  and  resume  possession  of the  Leased  Premises,  if Lessee  shall be
adjudicated  a  bankrupt  or  insolvent,  or if a receiver  or trustee  shall be
appointed for Lessee's business or property,  or if Lessee shall file a petition
in bankruptcy or insolvency, or if a petition or other proceeding shall be filed
by or against Lessee seeking corporate or other  reorganization,  liquidation or
other similar relief or if Lessee shall make an assignment or an arrangement for
the benefit of creditors,  or if an involuntary  petition shall be filed against
Lessee in  bankruptcy or  insolvency  and such  petition  shall not be dismissed
within sixty (60) days.


                                      -74-
<PAGE>


         22.  REMEDIES CUMULATIVE
              -------------------

              The various rights,  elections and remedies of Lessor contained in
this  Lease  shall  be  cumulative,  and no one of them  shall be  construed  as
exclusive of any of the others,  or of any right,  priority or remedy allowed or
provided for by law.

         23.  WAIVER OR DEFAULT
              -----------------

              The waiver by either  party of any default in the  performance  by
the other of any covenant shall not be construed to be a waiver of any preceding
or subsequent  default of the same or any other covenant  contained herein.  The
subsequent  acceptance  of Rent or other  sums by  Lessor  shall not be deemed a
waiver of any  preceding  default  other  than the  failure of Lessee to pay the
particular rental or other sum so accepted.

         24.  HOLDING OVER
              ------------

              If Lessee shall hold  possession of the Leased  Premises after the
end of the term or other termination of this Lease, Leases shall be deemed to be
occupying the Leased Premises as a tenant from month to month, subject to all of
the  conditions,  provisions and obligations of this Lease;  provided,  however,
Lessee  shall be liable for any and all  damages  and  expense  that  Lessor may
sustain by virtue of Lessee's holding over,  including,  but not limited to, any
amount for which Lessor may be liable under,  or as a result of, any other lease
entered into by Lessor for a term  beginning at or after the  expiration  of the
term of this Lease.  Nothing  contained  in this Lease shall be  construed  as a
consent by Lessor to the  occupancy  or  possession  of the Leased  Premises  by
Lessee after the expiration of the term of this Lease. Rather, at the end of the
term of the  Lease,  Lessor  shall be  entitled  to the  benefit  of all laws or
ordinances  relating to the recovery of the  possession  of lands and  tenements
held over by tenants that now may be in force or hereafter  may be enacted,  and
Lessor may proceed under such laws or ordinances,  without notice to Lessee, all
statutory notice requirements being expressly waived by Lessee.

         25.  SURRENDER
              ---------

              Upon the expiration of the term of this Lease,  Lessee immediately
shall surrender the Leased Premises broom-clean and in good order and condition,
ordinary wear and tear excepted.  All of Lessee's  personal property at or about
the Leased Premises (but not permanently  affixed parts of the Leased  Premises)
shall be removed by Lessee at or before the expiration of this Lease or shall be
deemed  abandoned by Lessee.  Any damage to the Leased  Premises  caused by such
removal shall be repaired by Lessee at its own expense.

         26.  DEFAULT
              -------

              (a) If Lessee  fails to pay any Rent or  Additional  Rent when due
and such failure continues for a period of five (5) days after Lessor shall have
made written demand on Lessee for payment, or if Lessee otherwise is at any time


                                      -75-
<PAGE>



in default under this Lease and continues in such default for a period of thirty
(30) days after  Lessor  shall  have  demanded  in  writing to Lessee  that such
default be cured, or if such latter default is not capable of being cured within
a fifteen (15) day period,  such additional time (not to exceed  forty-five (45)
days) as is reasonably necessary to cure such default,  provided Lessee promptly
commences  and  diligently  pursues to cure such  default,  then  Lessor may, at
Lessor's  option,  terminate this Lease (without  releasing Lessee of liability)
and by summary  proceedings or other manner  prescribed by law, reenter and take
possession of the Leased  Premises.  If Lessor  should so terminate  this Lease,
Lessee  shall pay to Lessor as damages,  upon demand,  all expenses  (including,
without limitation,  attorneys' fees) of any proceedings  necessary in order for
Lessor  to  recover  possession  of the  Leased  Premises  and the  expenses  of
reletting  the  Leased  Premises  (including,  without  limitation,   reasonable
attorneys'  fees,  brokerage  commissions,  and the costs of putting  the Leaded
Premises in good order and preparing it for reletting, plus either:

                   (i)   Liquidated damages in an amount equal to the excess, if
any,  of the Rent and  Additional  Rent that  would have been  payable  over the
unexpired  portion of the term of this Lease over the rental value of the Leased
Premises for such unexpired  portion of the term of this Lease, as discounted at
the  then  publicly  declared  prime  rate of the  Federal  Bank  in  Baltimore,
Maryland; or

                   (ii)  Damages  in an amount  to the  excess,  if any,  of the
monthly  Rent and  Additional  Rent over the  monthly  rentals,  if any, if fact
collected by Lessor as the result of a reletting of the Leased  Premises at such
rent and upon such terms as Lessor,  in its sole  discretion,  elects to accept.
Separate  actions may be maintained  each month by Lessor to recover the damages
then due as provided for in this subparagraph (ii) and any such action shall not
prejudice the rights of Lessor to collect damages for any subsequent  month in a
similar proceeding.

              (b)  No re-entry or reletting of the Leased  Premises,  whether or
not the term of such reletting  extends beyond the term of this Lease,  shall be
construed  as an  election  by Lessor to: (i) accept a  surrender  of the Leased
Premises, or (ii) release Lessee of any of its obligations under this Lease.

              (c)  Should Lessor,  pursuant to its rights under  Paragraph 26(a)
hereof,  elect to terminate  this Lease and reenter and take  possession  of the
Leased Premises,  Lessor shall use commercially  reasonable efforts,  under then
prevailing circumstances, to relet the Leased Premises.

         27.  ACCESS TO LEASED PREMISES
              -------------------------

              (a)  Lessor and its  designees  shall have the right  (subject  to
being accompanied by Lessee's  representative at all times for security reasons)
to enter  upon the  Leased  Premises  at all  reasonable  hours,  after 24 hours
notice,  (and in  emergencies,  at all times):  (i) to inspect the same; (ii) to


                                      -76-
<PAGE>



make repairs,  additions,  or alterations to the Leased Premises or the building
in which the same are located or any property  owned or  controlled by Landlord;
(iii) to  exhibit  the  Leased  Premises  to any  prospective  buyer,  lessee or
mortgagee or their respective agents or representatives; and (iv) for any lawful
purpose.

              (b)  For a period  commencing three (3) months prior to the end of
the term,  Lessor may have reasonable  access to the Premises for the purpose of
exhibiting  the same to  prospective  tenants and to post any "For Rent" or "For
Lease" signs upon the Leased Premises.

         28.  SUBORDINATION AND ATTORNMENT
              ----------------------------

              (a)  This  Lease is  subject  and  subordinate  to the lien of all
present  and  future  mortgages  and/or  deeds of trust  encumbering  the Leased
Premises,  all present and future advances under such mortgages  and/or deeds of
trust, and all renewals, extensions,  modifications,  recastings or refinancings
of such  mortgages  and/or deeds of trust.  Lessee agrees that, in the event any
proceedings are brought under or for the foreclosure of any such mortgage and/or
deed of trust,  Lessee shall, if requested to do so by the beneficiary  under or
holder of such mortgage  and/or deed of trust or by any successor in interest to
such beneficiary or holder, automatically become the lessee of such beneficiary,
holder  or  successor  in  interest  and  shall  automatically  attorn  to  such
beneficiary, holder and/or successor in interest and recognize such beneficiary,
holder  and/or  successor  in  interest  as the  Lessor  under  this  Lease.  In
confirmation of such attornment, however, Lessee shall, at the request of Lessor
or any  beneficiary,  holder or  successor  in  interest,  promptly  execute any
requisite or  appropriate  certificate or other document for the benefit of such
beneficiary, holder and/or successor in interest.

              (b)  In the event that,  after the date of this Lease, a bona fide
loan shall be made by an insurance company, savings bank, commercial bank, trust
company, or other lender and secured by a mortgage or deed of trust constituting
a lien  against  any  portion  of the  Leased  Premises  and said  lender  shall
complete,   execute   and   acknowledge   a   subordination,   attornment,   and
non-disturbance agreement, then and in that event, Lessee shall subordinate this
Lease to said mortgage or deed of trust by executing and  acknowledging the said
subordination, attornment and non-disturbance agreement.

              (c)  Upon any assignment or  termination  of Lessor's  interest in
the Leased Premises,  Lessee shall,  upon request,  attorn in writing to the new
owner of the Leased  Premises and shall pay to the new owner all rents and other
monies  required to be paid and perform all of the other  obligations  of Lessee
under this  Lease.  Following  any sale by Lessor of the  property  of which the
Leased  Premises are a part, all  obligations to the assigning  Lessor to Lessee
shall cease and  terminate and Lessee shall look solely to the successor for the
performance of Lessor's duties hereunder.

              (d)  Notwithstanding  the  foregoing,  this  Lease  shall  not  be
terminated so long as Lessee is not in default of any provisions in this Lease.


                                      -77-
<PAGE>



              (e)  Lessor shall,  within fifteen (15) days after the date hereof
(or prior to the effective date of any encumbrance  mentioned in this Section 28
created after the date hereof)  obtain from the holder of any such  encumbrance,
an agreement whereby if such holder or any successor in interest shall come into
possession  of the  Leased  Premises,  or any part  thereof,  by  dispossession,
foreclosure or otherwise,  or shall become the owner of such  property,  or take
over the rights of Lessor to such  property,  said holder  shall not disturb the
possession, use or enjoyment of the Leased Premises by Lessee, its successors or
assigns,  nor  disaffirm  this  Lease  or  Lessee's  rights  or  estate  granted
hereunder,  so long as Lessee performs all of its obligations in accordance with
the terms of this Lease.

         29.  RIGHT TO CURE DEFAULTS
              ----------------------

              (a)  If  Lessee  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then, in addition to Lessor's other rights,  but
not the  duty,  to cure  such  breach  at  Lessee's  expense.  Lessee  agrees to
reimburse  Lessor,  within fifteen (15) days after Lessor submits a statement of
the amount due, as  Additional  Rent,  for all expenses  incurred by Lessor as a
result of any efforts made by Lessor to cure any such breach.

              (b)  If  Lessor  shall  fail  to  comply  fully  with  any  of its
obligations  under this Lease,  then,  in addition to Lessee's  other rights and
remedies under this Lease at law and in equity, Lessee shall have the right, but
not the duty,  to cure such breach at Lessor's  expense;  provided that prior to
the  exercise of such right to cure,  Lessee  shall give Lessor  written  notice
specifying  the nature of the breach and Lessor  shall be  entitled  to ten (10)
days  after  receipt of such  notice  within  which to cure said  breach or such
additional  time as may be necessary if such breach is not  susceptible  to cure
within said ten (10) days,  in which case Lessor  shall  commence to cure within
said ten (10) day period. Lessor agrees to reimburse Lessee, within fifteen (15)
days after  Lessee  submits a  statement  of the amount  due,  for all  expenses
incurred by Lessee as a result of any efforts by Lessee to cure any such breach.
If Lessor fails to reimburse  Lessee as aforesaid,  Lessee may offset the amount
due against the payments of Rent  becoming  due  hereunder  unless  Lessor gives
written  notice of dispute  within said  fifteen  (15) day period  either to the
existence of any default or the  reasonableness  of the amount expended to cure.
In the event such notice of dispute is given, the provisions of subparagraph (c)
shall govern. The right to setoff against Rent shall be subordinate to and there
shall be no setoff  against the holder of any  mortgages or deed of trust or any
purchaser  at  foreclosure  or deed in lieu thereof on all or any portion of the
Leased  Premises.  The amount of all setoffs shall be limited to the  cumulative
sum of One Hundred Thousand Dollars ($100,000.00).

              (c)  If  Lessor  has  given  notice  of  dispute  as  provided  in
subparagraph (b), Lessee may have the issues of whether the Lessor is in default
of  its  obligations  or  the  reasonableness  of  the  amount  of  expenditures
determined by arbitration.  Pending the results of such arbitration, there shall
be no setoff. In the event the arbitrators determine that Lessor was in default,
Lessor  shall pay all costs of  arbitration  and Lessee  shall have the right to


                                      -78-
<PAGE>



offset  all of its costs and  expenses  of  remedying  such  default  (including
unreimbursed costs of the arbitration  proceeding)  against the payments of Rent
becoming due hereunder, subject to the limitations set forth in subparagraph (b)
above. If the arbitrators  determine that Lessor was not in default, then Lessee
will pay all of the arbitration.

              (d)  If Lessor is determined  to be in default in its  obligations
under  Paragraph  15(c) of this Lease and Lessee  shall  remedy such  default in
accordance with the preceding paragraph,  Lessee shall be entitled to offset one
hundred  fifteen  percent  (115%) of the costs and  expenses of  remedying  such
default, with the additional fifteen percent (15%) being to reimburse Lessee for
its overhead.

         30.  BROKERAGE
              ---------

              Lessor hereby acknowledges that Montgomery Realty, Inc. ("Broker")
has served as  Lessor's  agent in  connection  with this Lease and agrees to pay
said Broker a commission as per a separate  agreement between Lessor and Broker.
Lessor  warrants  to Lessee and Lessee  warrants to Lessor that it has not dealt
with any other  broker or real estate  agent or finder in  connection  with this
Lease and that, except for the aforesaid  commission payable to Broker, no right
or claim for  commission or other  compensation  has been created by its actions
with  respect to this Lease.  Lessor and Lessee  shall  indemnify  and hold each
other  harmless  against all loss,  liability or expense,  including  reasonable
attorney's fees and litigation costs, incurred by the other to the extent one or
the other is shown to be in breach of the foregoing warranties.

         31.  EFFECT OF CONVEYANCE
              --------------------

              If during the term of this Lease  Lessor sells its interest in the
Leased  Premises or this Lease,  then from and after the effective  date of such
sale,  Lessor  shall  be  released  and  discharged  from  any and  all  further
obligations and responsibilities  under this Lease except those already accrued.
Any such sale  shall be  subject to this  Lease and  Lessor  shall  require  any
purchaser to acknowledge the existence of Lessee's tenancy.

         32.  INTERPRETATION
              --------------

              The captions by which the  paragraphs of this Lease are identified
are for  convenience  only and shall have no effect upon the  interpretation  of
this Lease. Whenever the context so requires,  the singular number shall include
the plural,  and plural shall refer to the singular and the neuter  gender shall
include the masculine and feminine genders. If any provision of this Lease shall
be held to be unenforceable by a court, the remaining provisions shall remain in
effect and shall in no way be impaired.


                                      -79-
<PAGE>



         33.  ENTIRE INSTRUMENT
              -----------------

              All of the agreements previously and contemporaneously made by the
parties are  contained  in this Lease,  and this Lease cannot be modified in any
respect except by a writing executed by Lessor and Lessee.

         34.  ESTOPPEL CERTIFICATES
              ---------------------

              Recognizing  that both  parties may find it necessary to establish
to third parties, such as accountants,  banks,  mortgagees or the like, the then
current status of performance hereunder, either party, on the written request of
one to the  other  made  from  time to time,  will  promptly  furnish  a written
certificate  on the status of any matter  pertaining  to this Lease in such form
and substances as may from time to time be reasonably required.

         35.  NOTICES
              -------

              Any notices and other  communications  required or permitted to be
given by either  party to the other  shall be in writing  and shall be deemed to
have been served when hand  delivered  or, if the United States Mail is used, on
the second business day after the notice is deposited in the United States Mail,
postage prepaid, registered or certified mail, or by overnight delivery service,
and addressed to the parties as follows:

         To Lessee:               Jacques R. Rubin
                                  President
                                  Bio Science Contract Product Corp.
                                  9000 Virginia Manor Road
                                  Suite 290
                                  Beltsville, Maryland  20705

         To Lessor:               Muirkirk Manor Associates Limited Partnership
                                  c/o The Anastasi Stephens Group, Inc.
                                  9000 Virginia Manor Road, Suite 201
                                  Beltsville, Maryland   20705

Either party,  by written  notice to the other,  may change its address to which
notices are to be sent.


                                      -80-
<PAGE>



         36.  WAIVER
              ------

              Any waiver of either  Lessor or Lessee of any  default,  breach or
failure by the other to comply with any term,  condition,  or  provision of this
Lease shall not constitute a waiver of any other  default,  breach or failure by
such  defaulting  party.  No covenant,  term or condition of this Lease shall be
deemed to have been waived by either  party unless such waiver be in writing and
signed by the party to be charged therewith.

         37.  QUIET ENJOYMENT
              ---------------

              So  long as  Lessee  is not in  default  beyond  applicable  grace
periods,  Lessee shall have peaceful and quiet use and  possession of the Leased
Premises  without  hindrance  on the part of Lessor or any person  claiming  by,
through or under Lessor.

         38.  RECORDING THIS LEASE
              --------------------

              Lessee may not record  either this Lease nor a memorandum  thereof
among or in any public records without Lessor's prior written consent.

         39.  GOVERNING LAW
              -------------

              All questions with respect to  construction  of this Lease and the
rights and liabilities of the parties shall be determined in accordance with the
laws of the State of Maryland.

         40.  BENEFIT
              -------

              Subject to the restrictions on assignment and subletting set forth
in Paragraph 20, the  covenants,  terms and conditions of this Lease shall inure
to the  benefit of and be binding  upon  Lessor and Lessee and their  respective
successors and assigns.

         41.  REASONABLE CONSENT
              ------------------

              Wherever in this Lease  Lessor or Lessee is required to obtain the
consent or  approval of the other,  it is agreed  that such  consent or approval
shall not be unreasonably withheld or delayed.

         42.  TIME OF ESSENCE
              ---------------

              Time is of the  essence  in the  performance  of all of Lessor and
Lessee's obligations under this Lease.

                  (See Lease Addendum for Paragraphs 43 and 44)


                                      -81-
<PAGE>



         IN WITNESS WHEREOF, the parties have executed this Lease on the day and
year first above written.


WITNESS:                           LESSOR:

                                   MUIRKIRK MANOR ASSOCIATES
                                   LIMITED PARTNERSHIP,
                                   a Maryland limited partnership

                                   By:   THE ANASTASI STEPHENS GROUP, INC.
                                         its general partner


/s/ Jolina Early                         By: /s/ Joseph Anastasi         (SEAL)
- ------------------                           ----------------------------------


WITNESS:                           LESSEE:

                                   BIO SCIENCE CONTRACT PRODUCTION CORP.
                                   a Maryland corporation


/s/ Jolina Early                         By:  /s/ Jacques R. Rubin
- -------------------                          ----------------------



                                      -82-
<PAGE>



                              EXHIBIT "C" (PART II)

                                 LEASE ADDENDUM
                                 --------------


                                  (PARK PLACE)


         THIS LEASE ADDENDUM made as of the 20th of March,  1992, is attached to
and made part of that certain  Lease of even date  herewith (the "Lease") by and
between  MUIRKIRK  MANOR  ASSOCIATES  LIMITED  PARTNERSHIP,  a Maryland  limited
partnership ("Lessor"), and Bio Science Contract Production Corp., a Maryland
corporation ("Lessee").

                              W I T N E S S E T H:
                              - - - - - - - - - -

         WHEREAS,  Lessor and Lessee  have  agreed to amend,  supplement  and/or
modify  the  Lease as herein  provided,  Landlord  and  Tenant  hereby  agree as
follows:

         1.   TERM - OPTION
              -------------

              Lessee, at its option,  shall have the right to extend the Term of
this Lease on the same  terms and  conditions,  as the  original  term  thereof,
except as otherwise provided in this Addendum with respect to the amount of Base
Rent  due  during  the  respective  extension  period,  for two  (2)  additional
consecutive terms of Five (5) years each (the "Extension  Periods"),  subject to
the satisfaction of the following conditions:

              (i)  Lessee's option to extend the Lease for each of the Extension
Periods shall be  exercisable  only by written  notice to Lessor at least ninety
(90) days prior to the  commencement  date of each Extension  Period.  If Lessee
does not give Lessor written notice as aforesaid, Lessee shall be deemed to have
not exercised its respective extension option.

              (ii)   At  the  time  of   exercise  of  the  option  and  at  the
commencement of each Extension Period,  Lessee shall not be in default under the
Lease beyond any applicable grace period.

              (iii)  Upon exercising the  option,  the  Base  Rent  will  be the
product  obtained by  multiplying  the Base Rent for the  immediately  preceding
Lease Year by one hundred four percent (104%).


                                      -83-
<PAGE>



         2.   RENT
              ----

              For months 1 through 5 of the first base year,  the  monthly  base
rent is  hereby  abated.  Monthly  base  rent  payments,  in full,  shall  begin
September  1, 1992.  It is agreed  that  Common  Area  Maintenance  charges  and
Additional  Rent,  if any,  will be  collected  on the first  day of  occupancy,
pursuant to Paragraph 8.(c).

              LESSEE IMPROVEMENTS
              -------------------

              (a)  Lessor has agreed to construct and complete the  installation
of Lessee  improvements,  as set forth in  Exhibit  "B" to the  Lease,  within a
budget of one hundred and twenty  thousand and 00/100  ($120,000.00)  toward the
improvements requested by the Lessee and it is agreed that the demising wall and
 .60 per s.f.  for design is part of the above  allowance.  It is agreed that all
plans,  specifications,  the General Contractor and its sub contractors, as well
as their  work  schedule,  will be  approved  by the  lessor  or its  Architect.
Payments to the General  Contractor will be made in accordance with the schedule
and method established by the Lessor and its lender.

              (b)  In the event that the cost of constructing and installing the
Lessee improvements to the Leased Premises exceeds the $120,000.00, lessee shall
pay directly to the General  Contractor the difference  between the cost and the
allowance.


                                      -84-
<PAGE>



         IN WITNESS  WHEREOF,  the parties have executed this Lease  Addendum on
the day and year first above written.


ATTEST:                                      LESSOR:

                                             MUIRKIRK MANOR ASSOCIATES LIMITED
                                             PARTNERSHIP,
                                             A Maryland limited partnership

                                             By:   THE ANASTASI STEPHENS GROUP,
                                                   INC.,
                                                   its general partner



/s/ Jolina Early                             By:   /s/ Joseph Anastasi
- ----------------                                   -------------------



                                               LESSEE:

                                               BIO SCIENCE CONTRACT PRODUCTION
                                               CORP.,
                                               a MARYLAND corporation



/s/ Jolina Early                               By:   /s/ Jacques R. Rubin
- -----------------                                    ---------------------


                                      -85-
<PAGE>


                                   EXHIBIT "D"

                               AMENDMENT TO LEASES
                              -------------------

         THIS AMENDMENT TO LEASES ("Amendment"),  dated as of 12 November, 1992,
is by and between  MUIRKIURK MANOR ASSOCIATES  LIMITED  PARTNERSHIP,  a Maryland
limited  partnership  ("Lessor"),  and  CEPHALON  PROPERTY  MANAGEMENT,  INC., a
Delaware corporation ("Lessee"), with reference to the following background:

         A. Pursuant to a certain Lease dated December 28, 1990 ("First Lease"),
a certain  Lease dated  November 12, 1991  ("Second  Lease") and a certain Lease
dated March 20, 1992 ("Third  Lease";  the First  Lease,  Second Lease and Third
Lease are collectively referred to herein as the "Leases"), Lessor leased to the
Bio Science Contract  Production Corp., a Maryland  corporation ("Bio Science"),
certain  premises  known as Suites 260, 270, 280 and 290,  9000  Virginia  Manor
Road,  Beltsville,  Prince  George's  County,  Maryland,  as  more  particularly
described in the Leases ("Premises").

         B. Bio Science has assigned all of its right, title and interest in and
to the Leases and the Premises to Lessee  pursuant to a certain  Assignment  and
Assumption of Leases dated November, 1992.

         C. Lessor and Lessee desire to modify  certain terms and  provisions of
the Leases as hereinafter set forth.

         NOW, THEREFORE,  for good and valuable  consideration,  the receipt and
sufficiency of which are hereby acknowledged,  and intending to be legally bound
and to bind their respective successors and assigns,  Lessor and Lessee agree as
follows:

         1.   USE.  (A)   Without limiting anything contained therein, Section 5
              of the Leases is hereby amended to expressly  permit Lessee to use
              the Premises for the research, development, testing and production
              of biological  compounds and other  pharmaceutical  substances for
              commercial and no-commercial purposes.

                    (B)   Lessee  shall  defend,  indemnify  and  save  harmless
              Lessor  from  and  against  any and  all  liabilities,  costs  and
              expenses  (including  reasonable  attorneys' fees) imposed upon or
              incurred  by Lessor  solely by  reason of any act or  omission  of
              Lessee in the use and storage of any Hazardous  Substance on or in
              the Premises or in the disposal of any such  Hazardous  Substance.
              As used herein,  "Hazardous  Substance"  shall mean any  hazardous
              substance,  toxic  material  or other  substance  regulated  under
              federal, state or local law.


                                      -86-
<PAGE>



         2. ASSIGNMENT.  Notwithstanding  anything to the contrary  contained in
Section 20 or  elsewhere  in the Leases,  and  subject to  Lessor's  mortgagee's
consent,  Lessee  shall,  provided  it is not then in  default  under the Leases
beyond any applicable  grace period,  have the right and privilege to assign one
or more of the Leases, without Landlord's consent, to an Affiliate of Lessee. As
used herein, "Affiliate" shall mean any person or entity controlling, controlled
by or under common control with Lessee.  Lessee shall give Lessor written notice
of any assignment made under this Section 2.

         3.  ACCESS.  Notwithstanding  anything  to the  contrary  contained  in
Section 27 or elsewhere  in the Leases,  Lessee shall have the right to prohibit
Lessor's   access  to  those  portions  of  the  Leased  Premises  that  contain
confidential or proprietary  information or involve a risk of  contamination  to
the compounds being produced therein.

         4. NOTICES.  Section 35 of the Leases is hereby amended to require that
all notices  required or  permitted to be given by Lessor under the Leases shall
be delivered to Lessee at the following address:  145 Brandywine  Parkway,  West
Chester, PA 19380, Attention: President.

         5. OPTION TO EXTEND FIRST LEASE.  Lessee, at its option, shall have the
right to extend the term of the First Lease on the same terms and  conditions as
the original term thereof, except as otherwise provided in Section 5(iii) hereof
with  respect to the amount of Base Rent due  during  the  respective  extension
period,  for two (2)  additional  consecutive  terms of five (5) years  (each an
"Extension Period), subject to the satisfaction of the following conditions:

              (i)  Lessee's  option to extend the First Lease for the  Extension
Periods shall be  exercisable  only by written  notice to Lessor at least ninety
(90) days prior to the commencement date of the Extension Period. If Lessee does
not give Lessor written notice as aforesaid,  Lessee shall be deemed to have not
exercised its respective extension option.

              (ii) At the time of exercise of the option and at the commencement
of the Extension Period,  Lessee shall not be in default under the Leases beyond
any applicable grace period.

              (iii)  Upon  exercising  the  option,  the Base Rent for the First
Lease  will be the  product  obtained  by  multiplying  the  Base  Rent  for the
immediately preceding Lease Year by one hundred four percent (104%).

         6.  LEASE  IMPROVEMENTS.  Subsections  (a) and (b) of Section 3 (Lessee
Improvements)  of the Lease  Addendum to the Third Lease are hereby  deleted and
the following shall be inserted in place thereof:


                                      -87-
<PAGE>



                   (a)  Lessor  has  agreed  to   construct   and  complete  the
              installation of Lessee  improvements,  as set forth in Exhibit "B"
              to the Lease,  within a budget of one hundred twenty  thousand and
              00/100 dollars ($120,000.00) towards the improvements requested by
              the Lessee  and it is agreed  that the  demising  wall and .60 per
              s.f. for design is part of the above allowance.  It is agreed that
              all  plans,   specifications,   the  General  Contractor  and  its
              subcontractors,  as well as their work schedule,  will be approved
              by Lessee or its Architect. Payment of the General Contractor will
              be made in accordance with the schedule and method  established by
              the Lessor and its lender.

                   (b) In the event that the cost of constructing and installing
              the  Lessee   improvements  to  the  Leased  Premises  exceed  the
              $120,000,  Lessee shall pay directly to the General Contractor the
              difference between the cost and the allowance.

         7.  DURATION.  The  amendments to the Leases  resulting  from Section 1
through 5 of this Amendment shall remain in effect for so long as Lessee remains
the assignee of Bio Science's interest in the Leases.

         8. NO  FURTHER  AMENDMENT.  Except as amended  by this  amendment,  all
terms, provisions and agreements contained in the Leases are hereby ratified and
confirmed and remain in full force and effect.











                        [this space intentionally blank]



                                      -88-
<PAGE>



         IN WITNESS  WHEREOF,  Lessor and Lessee  have each duly  executed  this
Amendment as of the date first above written.


                                        MUIRKIRK MANOR ASSOCIATES
                                        LIMITED PARTNERSHIP,
                                        a Maryland limited partnership



                               By:      THE ANASTASI STEPHENS GROUP, INC.
                                        a Maryland close corporation its General
                                        Partner
                                        its General Partner


                                        By: /s/ Joseph Anastasi
                                            --------------------
                                        Name:   Joseph Anastasi
                                        Title:


                                        By: /s/ R. Glenn Stephens
                                            ---------------------
                                        Name:   R. Glenn Stephens
                                        Title:


                               CEPHALON PROPERTY MANAGMENT, INC.
                               a Delaware corporation


                                        By: /s/ Bruce A. Peacock 
                                            ---------------------
                                        Name:
                                        Title:



                                      -89-
<PAGE>



                              EXHIBIT "D" (PART II)

                       ASSIGNMENT AND ASSUMPTION OF LEASES


         THIS ASSIGNMENT AND ASSUMPTION OF LEASES ("Assignment") is entered into
as of the 14th day of December , 1992, by BIO SCIENCE CONTRACT PRODUCTION CORP.,
a Maryland Corporation ("Assignor"),  and C EPHALON PROPERTY MANAGEMENT, INC., a
Delaware  corporation  ("Assignee").  For  valuable  consideration,  the parties
hereto,  each  intending  to be  legally  bound  and to  bind  their  respective
successors and assigns, hereby convenant and agree as follows:

         1.  ASSIGNMENT.  Assignor hereby assigns,  transfers and sets over unto
Assignee,  and Assignee  hereby  accepts,  all of  Assignor's  right,  title and
interest in and to (i) that certain  Lease dated  December  28, 1990,  (ii) that
certain  Lease  dated  November  12,  1991 and  Addendum  thereto and (iii) that
certain  Lease dated March 20, 1992 and  Addendum  thereto,  copies of which are
attached  hereto as,  respectively,  Exhibits  "A" - "C" and made a part  hereof
(collectively,   "Leases"),  each  between  Muirkirk  Manor  Associates  Limited
Partnership,  a Maryland  limited  partnership,  as landlord,  and Assignor,  as
tenant,  which Leases  pertain to Suites 260, 270, 280 and 290,  90000  Virginia
Manor  Road,  Park  Place,   Beltsville,   Prince  George's   County,   Maryland
("Premises").  This Assignment  includes all security  deposits paid by Assignor
under  the  Leases  and  all  allowances   and  amounts   available  for  lessee
improvements to the Premises.


         2. REPRESENTATIONS AND WARRANTIES.  Assignor represents and warrants to
Assignee that: (a) Assignor is the tenant under the Leases and the sole occupant
of the Premises,  (b) the Leases are the only leases or  agreements  whereby any
person  has been  granted  the right to use or occupy the  Premises  or any part
thereof,  (c)  Assignor  has not  previously  assigned  the Leases or sublet the
Premises  and has  received no notice of a prior  assignment,  hypothecation  or
pledge of the Leases or the rent payable thereunder, (d) there exists no default
by Assignor or the  landlord  under the  Leases,  or, to the best of  Assignor's
knowledge,  no event,  fact or circumstance  which, with the giving of notice or
the passage of time,  or both,  would  constitute  a default,  (e) the  security
deposits due under the Leases have been paid in full, the amount of the security
deposits has not been reduced and Assignor's  interest in the security  deposits
has not been previously pledged,  transferred or assigned, (f) the copies of the
Leases which are attached  hereto are true,  correct and complete and constitute
the entire  agreement  between  Assignor and the landlord under the Leases,  (g)
there are no actions or proceedings,  whether voluntary or involuntary,  pending
with respect to Assignor under any  bankruptcy,  insolvency,  debt adjustment or
similar law of the United States or any state  thereof,  (h) the landlord  under
the Leases has fulfilled all of its  representation,  warranties  and agreements


                                      -90-
<PAGE>



under the  Leases,  and (i) the  construction  and  installation  of all "lessee
improvements"  to the Premises have been completed in all respects in accordance
with the Leases,  except for any items specified on Schedule I hereto, there are
no payments due the landlord  under the Leases or any other party from  Assignor
or due Assignor from the landlord  under the Leases in connection  with any such
work,  except as specified on Schedule II hereto,  and the amount of $211,413.49
remains available for use in completing such work.

         3.  PERFORMANCE.  Assignor shall be responsible  for the observance and
performance of all  agreements and  obligations of the "Lessee" under the Leases
arising prior to the Effective Date (defined below). Assignee, and not Assignor,
shall be responsible  for the  observance and  performance of all agreements and
obligations  of the "Lessee"  under the Leases arising on or after the Effective
Date.

         4. EFFECTIVE DATE.  Notwithstanding  anything to the contrary contained
herein,  this Assignment  shall not become effective until such date ("Effective
Date"),  if ever,  that  Assignor and Assignee (i) enter into an Asset  Purchase
Agreement  providing for  Assignee's  acquisition  of certain assets of Assignor
located  on the  Premises  and (ii)  consummate  the  transactions  contemplated
thereunder.

         5. CONTINUING OBLIGATIONS.  Assignor acknowledges,  pursuant to Section
20 of the  Leases,  that the  assignment  effected  hereby  shall  not  release,
discharge  or affect  the  liabilities  of  Assignor  under the  Leases and that
Assignor shall at all times remain primarily liable under the Leases.

         6.  TERMINATION.  Assignee  shall have the absolute  and  unconditional
right and  privilege to terminate  this  Assignment as to any Lease at any time,
upon five (5) days' prior written  notice to Assignor.  As of the date specified
in any such  notice  ("Termination  Date"),  Assignor  shall be fully and solely
liable for all agreements  and  obligations of the "Lessee" under such Lease and
Assignee  shall have no further  obligations  under such  Lease,  except for any
liability or obligation  accrued  between the Effective Date and the Termination
Date.

         7.  INDEMNITY.  Assignor  shall  defend,  protect,  indemnify  and save
harmless  Assignee  from and against any and all  liabilities,  suits,  actions,
losses, damages, costs and expenses, including, without limitation, counsel fees
and court costs,  suffered or incurred by Assignee resulting from or relating to
any  failure  by  Assignor  to  observe  or  perform  any of its  agreements  or
obligations  under  the  Leases  prior  to  the  Effective  Date  or  after  the
Termination Date.


                                      -91-
<PAGE>




         IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment
as of the date first above written.

(Corporate Seal)                                     BIO SCIENCE CONTRACT
Attest:                                                PRODUCTION CORP.

/s/ Cindi R. Caplan                                  By: /s/ Jacques R. Rubin
- -------------------                                      ---------------------
Name:                                                     Name:
Title:                                                    Title:

(Corporate Seal)                                     CEPHALON PROPERTY
Attest:                                                 MANAGEMENT, INC.

/s/ Bruce A. Peacock                                 By: /s/ Frank Baldino
- --------------------                                     -----------------
Name:                                                    Name:
Title:                                                   Title:


                                      -92-
<PAGE>



                                   SCHEDULE I

                         UNCOMPLETED LESSEE IMPROVEMENTS
                         -------------------------------

                                      NONE.



































                                      -93-
<PAGE>




                                   SCHEDULE II

                       AMOUNT DUE FOR LESSEE IMPROVEMENTS
                       ----------------------------------

                                      NONE.



































                                      -94-
<PAGE>



                                   EXHIBIT "E"

                                LETTER AGREEMENT
                                ----------------



                                                        December 29, 1992


Muirkirk Manor Associates
  Limited Partnership
9000 Virginia Manor Road, Suite 210
Beltsville, MD 20705

Bio Science Contract Production Corp.
10000 Virginia Manor Road, Suite 340
Beltsville, MD 20705

                  Re:      9000 Virginia Manor Road, Beltsville
                           Maryland (Suites 260, 270, 280 and 290)
                           (the "Premises")
                           ----------------------------------------

Gentlemen:

         As you  know,  Bio  Science  desires  to assign  to  Cephalon  Property
Management,  Inc. ("CPMI") three leases for the Premises between Bio Science, as
Tenant, and Muirkirk Manor Associates Limited Partnership, as Landlord, pursuant
to an  Assignment  and  Assumption  of  Leases  dated  December  14,  1992  (the
"Assignment  Agreement").  The Landlord is required to obtain the consent of the
party holding the mortgage on the Premises,  Potomac  Equity  Portfolio  Limited
Partnership,  an Illinois  limited  partnership  ("Lender"),  to the  Assignment
Agreement,  as well as to the Amendment to Leases  between the Landlord and CPMI
dated  November 12, 1992,  which is to become  effective as of December 14, 1992
(the "Amendment").

         As a condition to giving its  consent,  the Lender has  requested  that
certain changes be made to the Assignment  Agreement and the Amendment,  and Bio
Science,  Muirkirk and CPMI wish to amend the documents to make such changes, as
follows:

         1. The first  sentence  of  Section 6 of the  Assignment  Agreement  is
hereby amended and restated in its entirety as follows:

         "Assignee  shall  have  the  right  and  privilege  to  terminate  this
         Assignment at any time,  upon 180 days prior written notice to Assignor
         and to Assignor's lender,  Potomac Equity Portfolio Limited Partnership
         (if it  continues  to hold the mortgage  covering  the  Premises)  (the


                                      -95-
<PAGE>



         "Lender"),  PROVIDED  that  such  termination  is in  conjunction  with
         Assignee's  transfer to Assignor of substantially  all of the equipment
         of  Assignor  acquired  by  Assignee  as of  December  14, 1992 (or the
         functional  equivalent  thereof) in substantially the same condition as
         existed as of November 11, 1992 or, in CPMI's discretion,  cash in lieu
         thereof at the value agreed to by CPMI and Assignor."

         2.  A new Section 8 is hereby added to the Assignment Agreement,  which
states in its entirety as follows:

         "8.  NOTICES.  All notices to be delivered  hereunder  shall be sent by
         hand delivery,  facsimile (with a confirmation copy sent by first-class
         mail) or reputable overnight courier, to the following addresses:

                  If to Assignor, to:

                  Bio Science Contract Production Corp.
                  10000 Virginia Manor Road, Suite 340
                  Beltsville, MD 20705

                  If to Lender, to:

                  Potomac Equity Portfolio Limited Partnership
                  c/o Amresco Institutional, Inc.
                  8300 Greensboro Drive, Suite 700
                  McLean, VA 22102
                  Attention:  David Cundiff

                  or to such other  address or  addressee  as shall be  properly
                  furnished to the other parties in the manner specified in this
                  paragraph 8."

                  3. Section 1(B) of the  Amendment is hereby  amended to insert
the phrase  "and its  successors  and  assigns"  after the word  "Lessor" in the
second line and in the fourth line.

                  4. Any  assignment  of the Leases to an Affiliate  pursuant to
Section 2 of the Amendment shall require the consent of Potomac Equity Portfolio
Limited Partnership, as the holder of the mortgage covering the Premises.

                  5. Section 3 of the  Amendment is hereby  amended and restated
in its entirety to read as follows:

                  "Notwithstanding anything to the contrary contained in Section
                  27 or elsewhere in the Leases,  Lessee shall have the right to
                  prohibit  Lessor's  access  to those  portions  of the  Leased


                                      -96-
<PAGE>



                  Premises that contain confidential or proprietary  information
                  or  involve a risk of  contamination  to the  compounds  being
                  produced therein, unless Lessor has, as appropriate,  signed a
                  mutually  satisfactory  form of  confidentiality  agreement or
                  taken such precautions as may be reasonably prescribed by CPMI
                  to avoid such contamination."

                  6. CPMI's  obligations  in this letter shall become  effective
upon receipt of the executed  consent of the Lender to the Assignment  Agreement
and Amendment, in form and substance satisfactory to CPMI.

                  If the foregoing is correct, please indicate your agreement in
the space provided below.

                                                 Very truly yours,


                                                  CEPHALON PROPERTY
                                                    MANAGEMENT, INC.


                                                     By:/s/ Bruce A. Peacock
                                                        ---------------------



Acknowledged and agreed to by:

MUIRKIRK MANOR ASSOCIATES
  LIMITED PARTNERSHIP
By The Anastasi Stephens Group, Inc.,
      its General Partner

By:/s/ Joseph Anastasi
   -------------------

BIO SCIENCE CONTRACT PRODUCTION CORP.


By:/s/ Jacques R. Rubin
   ---------------------
      Jacques R. Rubin
      President



                                      -97-




                                                                   Exhibit 10.35

             
                             MASTER LEASE AGREEMENT



         THIS   MASTER   LEASE   AGREEMENT,   dated  as  of   November  1,  1996
("Agreement"), between General Electric Capital Corporation, with an office at 4
North Park Drive, Suite 500, Hunt Valley, MD 21030 (hereinafter called, together
with its successors and assigns, if any, "Lessor"),  and North American Vaccine,
Inc., a Canadian  corporation  organized and existing under the Canada  Business
Corporations  Act with its mailing  address and chief place of business at 12103
Indian Creek Court, Beltsville, Maryland 20705 (hereinafter called together with
its successors and assigns, if any "Lessee").

WITNESSETH:

I.  LEASING:

         (a) Subject to the terms and conditions set forth below,  Lessor agrees
to lease to  Lessee,  and  Lessee  agrees to lease from  Lessor,  the  equipment
("EQUIPMENT")  described in Annex A to any schedule hereto  ("SCHEDULE").  Terms
defined in a Schedule and not otherwise  defined  herein shall have the meanings
ascribed to them in such Schedule.

         (b)  The   obligation  of  Lessor  to  purchase   Equipment   from  the
manufacturer or supplier  thereof  ("SUPPLIER")  and to lease the same to Lessee
under any  Schedule  shall be subject  to receipt by Lessor,  prior to the Lease
Commencement  Date (with  respect to such  Equipment),  of each of the following
documents in form and substance  satisfactory to Lessor: (i) a Schedule relating
to the Equipment then to be leased  hereunder,  (ii) a Purchase Order Assignment
and Consent in the form of Annex B to the  applicable  Schedule,  unless  Lessor
shall have  delivered its purchase order for such  Equipment,  (iii) evidence of
insurance which complies with the requirements of Section X, and (iv) such other
documents  as Lessor may  reasonably  request.  As a further  condition  to such
obligations  of Lessor,  Lessee shall,  upon delivery of such Equipment (but not
later than the Last Delivery Date specified in the applicable  Schedule) execute
and deliver to Lessor a Certificate of Acceptance (in the form of Annex C to the
applicable  Schedule)  covering such Equipment,  and deliver to Lessor a bill of
sale  therefor (in form and  substance  satisfactory  to Lessor).  Lessor hereby
appoints  Lessee its agent for  inspection  and acceptance of the Equipment from
the Supplier.  Upon execution by Lessee of any  Certificate  of Acceptance,  the
Equipment  described  thereon  shall be deemed to have been  delivered  to,  and
irrevocably accepted by, Lessee for lease hereunder.

II.  TERM, RENT AND PAYMENT:

         (a) The rent payable  hereunder and Lessee's right to use the Equipment
shall  commence  on the  date of  execution  by  Lessee  of the  Certificate  of
Acceptance  for such Equipment  ("LEASE  COMMENCEMENT  DATE").  The term of this
Agreement  for any  Equipment  shall be the period  specified in the  applicable


<PAGE>



Schedule for such Equipment.  If any term is extended,  the word "term" shall be
deemed to refer to all extended  terms,  and all  provisions  of this  Agreement
shall apply during any extended terms,  except as may be otherwise  specifically
provided in writing.

         (b) Rent shall be paid to Lessor at its address stated above, except as
otherwise directed by Lessor in writing. Payments of rent shall be in the amount
set forth in, and due in  accordance  with,  the  provisions  of the  applicable
Schedule. If one or more Advance Rent(s) (as specified in Schedule) are payable,
such Advance Rent(s) shall be (i) set forth on the applicable Schedule, (ii) due
upon  acceptance by Lessor of such Schedule,  and (iii) when received by Lessor,
applied to the first rent payment and the  balance,  if any, to the final rental
payment(s) under such Schedule.  In no event shall any Advance Rent or any other
rent payments be refunded to Lessee.  If rent is not paid within ten days of its
due date,  Lessee  agrees to pay a late charge of*  on, and in addition  to, the
amount of such rent but not exceeding the lawful maximum, if any.

         (c) Rent payments under any Schedule shall be allocated proportionately
to the  Equipment on such  Schedule on the basis of the values  assigned to each
unit  of  such  Equipment  on  Annex  A to such  Schedule,  provided  that  such
allocation  shall not be interpreted to allow Lessee to make partial  payment or
to partially terminate this Agreement, except as otherwise permitted hereunder

         (d) All Rent and other  payments  to be paid under this Lease to Lessor
shall be paid in U.S.  currency and without any deduction or withholding for, or
on account of, any domestic or foreign taxes. If under  applicable law, any Rent
or other sum cannot be paid  without a  deduction  or  withholding,  then Lessee
shall  increase  such Rent or other  payment  to  Lessor so that the net  amount
received by Lessor after such deduction or  withholding  (and the payment of any
other  amount that must be  deducted  or withheld as a result of such  increase)
shall be equal to the full amount that Lessor would have  received had such Rent
or other payment not been subject to any deduction or withholding.

III.  RENT ADJUSTMENT:

         (a) The periodic rent payments in each Schedule have been calculated on
the assumption (which, as between Lessor and Lessee, is mutual) that the maximum
effective  corporate  income tax rate  (exclusive  of any  minimum tax rate) for
calendar-year  taxpayers ("EFFECTIVE RATE") will be * each year during the lease
term.

         (b) If,  solely  as a  result  of  Congressional  enactment  of any law
(including,  without  limitation,  any modification of, or amendment or addition
to, the  Internal  Revenue Code of 1986 (the  "CODE")),  the  Effective  Rate is
higher  than * for any year during the lease  term,  then Lessor  shall have the
right to increase such rent payments by requiring


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


                                   - 2 -

<PAGE>




payment of a single  additional  sum equal to the  product of (i) the  Effective
Rate  (expressed  as a decimal)  for such year less * (or, in the event that any
adjustment  has been made  hereunder for any previous  year,  the Effective Rate
(expressed as a decimal) used in calculating the next previous adjustment) times
(ii) the adjusted  Stipulated  Loss Value.  The adjusted  Stipulated  Loss Value
shall be the Stipulated Loss Value (calculated as of the first rental due in the
year for which  such  adjustment  is being  made)  less the  product  of the Tax
Benefits that would be allowable  under Section 168 of the Code (as of the first
day of the year for which such adjustment is being made and all subsequent years
of the lease term) times the  Effective  Rate  (expressed  as a decimal) (in the
year for which such  adjustment  is being made).  Lessee shall pay to Lessor the
full  amount of the  additional  rent  payment on the later of (i) ten (10) days
after  receipt  of  notice  or (ii) the  first  day of the year for  which  such
adjustment is being made.

         (c) If,  solely  as a  result  of  Congressional  enactment  of any law
(including, without limitation, any modification of, or amendment or addition to
the Code),  the Effective  Rate is lower than* for or any year during the lease
term,  then  Lessor  shall  pay to Lessee a single  additional  sum equal to the
product of (i) the Effective Rate  (expressed as a decimal) for such year less *
(or, in the event that any  adjustment  has been made hereunder for any previous
year, the Effective Rate  (expressed as a decimal) used in calculating  the next
previous adjustment) times (ii) the adjusted Stipulated Loss Value. The adjusted
Stipulated Loss Value shall be the Stipulated  Loss Value  (calculated as of the
first rental due in the year for which such  adjustment  is being made) less the
product of the Tax  Benefits  that would be allowable  under  Section 168 of the
Code (as of the first day of the year for which  such  adjustment  is being made
and all subsequent  years of the lease term) times the Effective Rate (expressed
as a decimal)  (in the year for which such  adjustment  is being  made).  Lessor
shall pay to Lessee the full amount of the additional  rent payment on the later
of (i)  receipt  of notice  or (ii) the  first  day of the year for  which  such
adjustment is being made.

         (d)  Lessee's  and  Lessor's  obligations  under this Section III shall
survive any expiration or termination of this Agreement.

IV.   TAXES:   Except as provided  in Sections III and  XV(c), Lessee shall
have no liability for taxes (i)  imposed by the United States of America or
any  State or political subdivision thereof which  are based on or measured
by the net income of Lessor  or the net worth of Lessor, (ii) imposed on or
with respect to, or that would not have been  imposed but for, any transfer
by Lessor  of any  interest in  any Equipment  or any  part thereof,  (iii)
attributable to any period after the later  of the return of the  Equipment
to Lessor or  the termination of the  Lease, except to the  extent relating
to Lessee's use or possession of the Equipment  or payment due hereunder or
events occurring  or matters arising  prior to or  simultaneously with such
return or termination,  or (iv) which would  not have been imposed  but for


[*]    Confidential  information has been omitted and filed  separately with the
       Commission


                                   - 3 -


<PAGE>



and only to the extent of the negligence or willful  misconduct of Lessor or the
failure of Lessor to comply with any certification,  documentation, reporting or
similar  requirement  or that would not have been imposed but for the conduct by
Lessor in any taxing  jurisdiction of activities  unrelated to the  transactions
contemplated  by this  Lease.  Lessee  shall  report (to the  extent  that it is
legally permissible) and pay promptly all other taxes, fees and assessments due,
imposed,  assessed or levied against any Equipment (or the purchase,  ownership,
delivery, leasing, possession, use or operation thereof), this Agreement (or any
rentals or receipts hereunder),  any Schedule,  Lessor or Lessee by any foreign,
federal,  state or local government or taxing authority during or related to the
term  of  this  Agreement,   including,  without  limitation,  all  license  and
registration  fees,  and  all  sales,  use,  personal  property,  excise,  gross
receipts, franchise, stamp or other taxes, imposts, duties and charges, together
with any penalties,  fines or interest thereon (all hereinafter called "TAXES").
Lessee  shall  (i)  reimburse   Lessor  upon  receipt  of  written  request  for
reimbursement  for any Taxes  charged to or  assessed  against  Lessor,  (ii) on
request of Lessor,  submit to Lessor  written  evidence of  Lessee's  payment of
Taxes,  (iii) on all reports or returns show the  ownership of the  Equipment by
Lessor,  and (iv) send a copy thereof to Lessor.  Lessee,  at its  expense,  may
contest any Tax by appropriate  legal  proceedings  provided the  non-payment of
such Tax, or such  proceedings,  will not, in the opinion of counsel for Lessor,
adversely  affect  the  title,  property  interest  or  rights  of Lessor in the
Equipment and provided,  further, that if requested by Lessor, Lessee shall have
given to Lessor security  sufficient in form and amount, in Lessor's  reasonable
judgment,  to fully  satisfy the amount of the  contested  Tax and any potential
fines, penalties or costs.

V.  REPORTS:

         (a) Lessee  will notify  Lessor in writing,  within ten (10) days after
Lessee  becomes aware that any tax or other lien shall attach to any  Equipment,
of the full  particulars  thereof and of the  location of such  Equipment on the
date of such notification.

         (b) Lessee will within one  hundred  twenty  (120) days of the close of
each fiscal year of Lessee, deliver to Lessor, Lessee's balance sheet and profit
and  loss  statement,  certified  by  a  recognized  firm  of  certified  public
accountants. Upon request Lessee will deliver to Lessor quarterly, within ninety
(90) days of the close of each fiscal quarter of Lessee,  in reasonable  detail,
copies of Lessee's  quarterly  financial report certified by the chief financial
officer of Lessee.

         (c) Lessee will permit  Lessor to inspect any  Equipment  during normal
business hours and with reasonable  advance notice to Lessee of such inspection;
provided, however, that such persons shall comply with any reasonable conditions
imposed  by  Lessee   regarding   such   inspection  of  Equipment  in  Lessee's
manufacturing areas



[*]    Confidential  information has been omitted and filed  separately with the
       Commission


                                   - 4 -



<PAGE>



         (d) The  Equipment  will  initially  be delivered to and located at the
Equipment  Location  (specified  in the  applicable  Schedule)  and Lessee  will
promptly notify Lessor of any relocation of Equipment.  Upon the written request
of Lessor, Lessee will notify Lessor forthwith in writing of the location of any
Equipment as of the date of such notification.

         (e) Lessee will  promptly  and fully report to Lessor in writing if any
Equipment is lost or damaged  (where the estimated  repair costs would exceed *,
or is  otherwise  involved in an accident  causing  personal  injury or property
damage.

         (f) Within sixty (60) days after any written request by Lessor,  Lessee
will furnish a certificate  of an authorized  officer of Lessee  stating that he
has reviewed the  activities of Lessee and that,  to the best of his  knowledge,
there exists no default (as described in Section  XII(a) and (d)) or event which
with notice or lapse of time (or both) would become such a default.

VI.  DELIVERY, USE AND OPERATION:

         (a) All  Equipment  shall be  shipped  directly  from the  Supplier  to
Lessee.

         (b) Lessee agrees that the  Equipment  will be used by Lessee solely in
the  conduct  of its  business  and in a manner  complying  with all  applicable
federal, state, and local laws and regulations.

         (c) LESSEE  SHALL NOT MORTGAGE OR  HYPOTHECATE  ANY  EQUIPMENT,  OR THE
INTEREST OF LESSEE  HEREUNDER,  NOR SHALL LESSEE REMOVE ANY  EQUIPMENT  FROM THE
CONTINENTAL UNITED STATES, WITHOUT THE PRIOR WRITTEN CONSENT OF THE LESSOR.

         (d)  Lessee  may,  at its sole cost and  expense,  sublease  any of the
Equipment or assign all of its rights and  obligations  under the lease for such
Equipment  provided  Lessee  shall have first  notified  Lessor of the  proposed
sublease or assignment of such  Equipment and,  except as otherwise  provided in
this subsection  (d), Lessee shall have received  Lessor's prior written consent
(such  consent not to be  unreasonably  withheld or delayed) to such sublease or
assignment.  Notwithstanding anything to the contrary contained in the preceding
sentence,  at any time  during the term of the lease for any units of  Equipment
under  this  Agreement,  Lessee may sublet  all,  but not less than all,  of the
Equipment  described  on any one or more  Schedules  or assign all of its rights
under this  Agreement  with respect to the lease of such  Equipment,  (i) to any
transferee  which  shall,  as  the  result  of  a   reorganization,   merger  or
consolidation  directly involving Lessee, succeed to the business now carried on
by  Lessee or (ii) to any  entity  which is an  Affiliate  (as  defined  herein)
subsidiary of Lessee;  in each  instance,  without the prior written  consent of



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Lessor,  provided Lessor is given thirty (30) days' prior written notice of such
proposed sublease or assignment together with a copy of the proposed sublease or
assignment,  and such transferee shall (A) have assumed in writing,  in form and
substance  reasonably  satisfactory to Lessor,  all of the obligations of Lessee
under this Agreement  respecting the applicable  Equipment as if such transferee
were an original  signatory to this  Agreement and (B) be solvent and either (1)
have a net  worth  which is equal to or in  excess  of the net  worth of  Lessee
immediately  prior  to the  execution  of  this  Agreement  or (2)  have  caused
additional security reasonably  satisfactory to Lessor to be delivered to Lessor
prior to such sublease or assignment.  No such sublease or assignment  permitted
by this  subsection  (d) shall in any way  discharge or diminish any of Lessee's
obligations  hereunder  for the  lease  of such  Equipment.  Each  sublease  and
assignment  hereunder shall expressly provide that it is subject and subordinate
to this  Agreement,  and Lessee shall  further  assign its rights in and to such
sublease or assignment to Lessor as security for Lessee's obligations hereunder.
No sublease or assignment shall be for a term longer than the subject  Schedule.
Lessee and any assignee or sublessee shall execute all reasonable  documentation
required by Lessor to evidence the provisions of this subsection(d).

         (e)  Lessee  will  keep the  Equipment  free and clear of all liens and
encumbrances  other than  those  which  result  from acts of Lessor or any party
claiming by, through or under Lessor, or liens arising in the ordinary course of
the business of Lessee for sums not yet delinquent or which are being  contested
in good faith and for payment of which  adequate  assurance has been provided to
Lessor.

VII.  SERVICE:

         (a) Lessee will, at its sole  expense,  maintain each unit of Equipment
in good operating  order,  repair,  condition and appearance in accordance  with
manufacturer's recommendations,  normal wear and tear excepted. Lessee shall, if
at any time  requested  by Lessor in writing,  affix in a prominent  position on
each  unit  of  Equipment  plates,  tags or  other  identifying  labels  showing
ownership  thereof  by  Lessor.  

         (b) From and after the date of this Agreement, Lessee will not, without
the prior consent of Lessor, affix or install any accessory, equipment or device
on any Equipment if such addition will impair the originally  intended  function
or use of such Equipment. All additions, repairs, parts, supplies,  accessories,
equipment, and devices furnished, attached or affixed to any Equipment which are
not readily  removable  shall be made only in compliance  with  applicable  law,
including Internal Revenue Service guidelines,  and shall become the property of
Lessor. Lessee will not, without the prior written consent of Lessor and subject
to such conditions as Lessor may impose for its protection, affix or install any
Equipment to or in any other personal or real property.

         (c) Any alterations or  modifications to the Equipment that may, at any
time during the term of this Agreement, be required to comply



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with any  applicable  law,  rule or  regulation  shall be made at the expense of
Lessee.

VIII.  STIPULATED  LOSS VALUE:  Lessee shall promptly and fully notify Lessor in
writing if any unit of  Equipment  shall be or become lost,  stolen,  destroyed,
irreparably  damaged in the reasonable  determination of Lessee,  or permanently
rendered  unfit  for use from  any  cause  whatsoever  (such  occurrences  being
hereinafter  called  "CASUALTY  OCCURRENCES").  On the rental  payment date next
succeeding a Casualty  Occurrence (the "PAYMENT DATE"),  Lessee shall pay Lessor
the sum of (x) the Stipulated Loss Value (as specified on each Schedule) of such
unit  calculated  as of the  rental  next  preceding  such  Casualty  Occurrence
("CALCULATION  DATE");  and (y) all  rental  and  other  amounts  which  are due
hereunder  immediately  prior to the Payment  Date and  remaining  unpaid.  Upon
payment  of all sums due  hereunder,  (i) the term of this lease as to such unit
shall  terminate  (ii) the Rent and  Capitalized  Lessor's cost shall be reduced
proportionately  based  on the  value  assigned  to such  unit in Annex A to the
applicable  Schedule,  and  ((iii)  except  in the  case of the  loss,  theft or
complete  destruction  of  such  unit)  Lessor  shall  be  entitled  to  recover
possession of such unit.

IX. LOSS OR DAMAGE:  Lessee hereby assumes and shall bear the entire risk of any
loss, theft,  damage to, or destruction of, any unit of Equipment from any cause
whatsoever from the time the Equipment is shipped to Lessee until it is returned
to Lessor.

X. INSURANCE:  Lessee agrees, at its own expense,  to keep all Equipment insured
for such  amounts and against  such  hazards as Lessor may  reasonably  require,
including, but not limited to, insurance for damage to or loss of such Equipment
and liability  coverage for personal  injuries,  death or property damage,  with
Lessor named as  additional  insured and with a loss payable  clause in favor of
Lessor,  as its interest may appear,  irrespective  of any breach of warranty or
other act or omission of Lessee. All such policies shall be with companies,  and
on terms reasonably  satisfactory to Lessor.  Lessee agrees to deliver to Lessor
evidence of insurance  satisfactory to Lessor.  No insurance shall be subject to
any   co-insurance   clause.   Lessee   hereby   appoints   Lessor  as  Lessee's
attorney-in-fact  to make  proof of loss and  claim for  insurance,  and to make
adjustments  with insurers and to receive  payment of and execute or endorse all
documents, checks or drafts in connection with payments made as a result of such
insurance policies.  Any expense of Lessor in adjusting or collecting  insurance
shall be borne by Lessee.  Lessee will not make adjustments with insurers except
(i) with respect to claims for damage to any unit of Equipment  where the repair
costs do not exceed *, or (ii) with Lessor's written consent, such consent shall
not be  unreasonably  withheld or delayed.  Said policies shall provide that the
insurance  may not be altered or canceled by the insurer until after twenty (20)
days  written  notice to Lessor.  If Lessee has made the  payment  described  in
Section VIII above, Lessee shall be entitled to the insurance proceeds.



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In all other events, Lessor may, at its option, apply proceeds of insurance,  in
whole or in part, to (i) repair or replace Equipment or any portion thereof,  or
(ii) satisfy any obligation of Lessee to Lessor hereunder.  Notwithstanding  the
previous  sentence or Section VIII, the Lessee may cause any insurance  proceeds
to be  applied  directly  for the repair or  replacement  of  Equipment  if such
repairs or replacements are less than * for any one casualty and such repairs or
replacements are actually performed.

XI. RETURN OF EQUIPMENT:

         (a)  Upon  any  expiration  or  termination  of this  Agreement  or any
Schedule,  Lessee shall promptly,  at its own cost and expense:  (i) perform any
testing and repairs  required to place the  affected  units of  Equipment in the
same  condition and appearance as when received by Lessee  (reasonable  wear and
tear excepted) and in good working order for their originally  intended purpose;
(ii) if deinstallation,  disassembly or crating is required, cause such units to
be  deinstalled,   disassembled  and  crated  by  an  authorized  manufacturer's
representative  or such other  person as is  satisfactory  to Lessor;  and (iii)
return such units to a location  within a five hundred  (500) mile radius of the
original  Equipment  location in the  continental  United States as Lessor shall
direct.

         (b) Until Lessee has fully  complied with the  requirements  of Section
XI(a) above,  Lessee's rent payment  obligation and all other  obligations under
this Agreement shall continue from month to month notwithstanding any expiration
or termination of the lease term. Lessor may terminate such continued  leasehold
interest upon ten (10) days notice to Lessee.

XII. DEFAULT:

         (a) Lessor may in writing  declare this Agreement in default if: Lessee
breaches its  obligation to pay rent or any other sum when due and fails to cure
the breach  within *; Lessee  breaches any of its  insurance  obligations  under
Section X; Lessee breaches any of its other obligations under this Agreement and
fails to cure that  breach  within * after  written  notice  thereof  (provided,
however,  that no default shall be deemed to have occurred  under this clause in
the event that Lessee  commences a good faith effort to cure such breach  within
the aforesaid * period and diligently  prosecutes  such cure to completion,  and
such cure is completed  within * after the date of Lessor's  original  notice to
Lessee  of such  breach);  any  representation  or  warranty  made by  Lessee in
connection  with this  Agreement  shall be false or  misleading  in any material
respect when made;  Lessee becomes insolvent or ceases to do business as a going
concern;  any Equipment is illegally  used; or a petition is filed by or against
Lessee under any  bankruptcy or  insolvency  laws (and if such petition is filed
against Lessee,  it is not stayed or dismissed within 60 days). Such declaration
shall apply to all Schedules except as specifically excepted by Lessor.



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         (b) After default,  at the request of Lessor,  Lessee shall comply with
the provisions of Section XI(a).  Lessee hereby  authorizes  Lessor to enter any
premises  where any  Equipment  is  believed to be and take  possession  thereof
without  liability  for damages or  otherwise  (except for  physical  damage not
required by the  repossession of the Equipment).  Lessee shall,  without further
demand,  forthwith pay to Lessor (i) as liquidated damages for loss of a bargain
and not as a penalty, the Stipulated Loss Value of the Equipment  (calculated as
of the rental next preceding the  declaration of default),  and (ii) all rentals
and other sums then due  hereunder.  Lessor may,  but shall not be required  to,
sell  Equipment  at private or public  sale,  in bulk or in  parcels,  with such
notice as may be required by law, and without  having the  Equipment  present at
the place of sale; or Lessor may, but shall not be required to, lease, otherwise
dispose  of or keep idle all or part of the  Equipment.  The  proceeds  of sale,
lease or other  disposition,  if any,  shall be timely  applied in the following
order of  priorities:  (1) to pay all of Lessor's  costs,  charges and  expenses
incurred  in  taking,  removing,  holding,  repairing  and  selling,  leasing or
otherwise disposing of Equipment; then, (2) to the extent not previously paid by
Lessee, to pay Lessor all sums due from Lessee hereunder;  then (3) to reimburse
to Lessee any sums previously paid by Lessee as liquidated damages;  and (4) any
surplus shall be retained by Lessor.  Lessee shall pay any deficiency in (1) and
(2) forthwith.

         (c) The foregoing  remedies are cumulative,  and any or all thereof may
be  exercised in lieu of or in addition to each other or any remedies at law, in
equity, or under statute.  Lessee shall pay Lessor's reasonable  attorney's fees
and costs upon a  default.  Waiver of any  default  shall not be a waiver of any
other or subsequent default.

         (d) Any default under the terms of this or any other agreement  between
Lessor and Lessee may be  declared  by Lessor a default  under this and any such
other agreement.

XIII.  ASSIGNMENT:  Lessor  may,  without  the  consent of Lessee,  assign  this
Agreement  or any  Schedule,  provided  that any such  assignee  shall  agree in
writing to take no action to interfere with Lessee's quiet  enjoyment and use of
the Equipment in accordance  with the terms of this  Agreement so long as Lessee
is not  in  default  hereunder  and to  assume  the  obligations  of  Lessor  in
accordance  with the  terms of this  Agreement.  Lessee  agrees  that if  Lessee
receives  written notice of an assignment from Lessor,  Lessee will pay all rent
and all other  amounts  payable  under any assigned  Equipment  Schedule to such
assignee or as instructed by Lessor. Lessee further agrees to confirm in writing
receipt of the notice of assignment as may be reasonably  requested by assignee.
Lessee  hereby  waives and agrees not to assert  against any such  assignee  any
defense,  set-off,  recoupment claim or counterclaim  which Lessee has or may at


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<PAGE>

any time have against Lessor for any reason  whatsoever  except for any payments
rightfully  made by Lessee to an  assignee of Lessor  pursuant  to this  Section
shall  discharge the obligations of Lessee to Lessor with respect to, and to the
extent of, such payments.

XIV.  NET LEASE;  NO  SET-OFF,  ETC:  This  Agreement  is a net lease.  Lessee's
obligation  to pay rent and other  amounts due  hereunder  shall be absolute and
unconditional.  Lessee shall not be entitled to any abatement or reductions  of,
or set-offs against, said rent or other amounts, including,  without limitation,
those arising or allegedly arising out of claims (present or future,  alleged or
actual, and including claims arising out of strict tort or negligence of Lessor)
of Lessee  against  Lessor  under this  Agreement or  otherwise.  Nor shall this
Agreement  terminate or the  obligations  of Lessee be affected by reason of any
defect in or damage  to,  or loss of  possession,  use or  destruction  of,  any
Equipment from whatsoever cause,  except as otherwise provided herein. It is the
intention  of the  parties  that rents and other  amounts  due  hereunder  shall
continue  to be  payable  in all events in the manner and at the times set forth
herein unless the obligation to do so shall have been terminated pursuant to the
express terms hereof. Nothing herein shall be construed to relieve Lessor of any
of its  obligations  under this  Agreement or prevent  Lessee from  pursuing any
lawful remedy against Lessor for Lessor's breach of its  obligations  under this
Agreement in a separate action.


XV. INDEMNIFICATION:

         (a) Lessee hereby agrees to indemnify,  save and keep harmless  Lessor,
its  agents,  employees,  successors  and  assigns  from and against any and all
losses,  damages,  penalties,  injuries,  claims,  actions and suits,  including
reasonable legal expenses,  of whatsoever kind and nature,  in contract or tort,
or  otherwise  (except (i) if and only to the extent  caused by the  indemnified
party's gross negligence or willful  misconduct,  (ii) by Lessor's breach of its
representations  and warranties  contained in Section XIX(f) hereof or (iii) the
claim is based on a loss of Tax  Benefits  (as defined  under  subsection  XV(b)
below)),  and including,  but not limited to, Lessor's strict liability in tort,
arising out of (i) the selection, manufacture, purchase, acceptance or rejection
of Equipment,  the ownership of Equipment during the term of this Agreement, and
the  delivery,  lease,  possession,  maintenance,  uses,  condition,  return  or
operation of Equipment (including, without limitation, latent and other defects,
whether  or not  discoverable  by  Lessor or  Lessee  and any claim for  patent,
trademark  or  copyright  infringement  or  environmental  damage)  or (ii)  the
condition of Equipment sold or disposed of after use by Lessee, any sublessee or
employees of Lessee.  Lessee shall fully and promptly pay,  perform,  discharge,
defend,  indemnify and hold harmless Lessor and its  Affiliates,  successors and
assigns,  directors,  officers,  employees  and  agents  from  and  against  any
Environmental  Claim or Environmental  Loss. Lessee shall, upon request,  defend



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any  actions  based on, or  arising  out of, any of the  foregoing.  In case any
action,  suit  or  proceeding  is  brought  against  any  indemnified  party  in
connection with any claim indemnified against hereunder,  such indemnified party
will promptly after receipt of notice of the  commencement of such action,  suit
or proceeding  notify Lessee hereof,  enclosing a copy of all papers served upon
such  indemnified  party,  but  failure to give such  notice or to enclose  such
papers shall not relieve Lessee from any liability  hereunder unless and only to
the extent such failure  prevents or materially  prejudices  Lessee's ability to
defend such claim, seek coverage under relevant  insurance  policies or mitigate
damages arising therefrom.

         (b) Lessee hereby  represents,  warrants and covenants  that (i) on the
Lease  Commencement  Date for any unit of Equipment,  such unit will qualify for
all of  the  items  of  deduction  and  credit  specified  in  Section  C of the
applicable  Schedule ("TAX  BENEFITS") in the hands of Lessor (all references to
Lessor in this Section XV include Lessor and the consolidated  taxpayer group of
which Lessor is a member), and (ii) at no time during the term of this Agreement
will Lessee take or omit to take,  nor will it permit any  sublessee or assignee
to take or omit to take,  any action  (whether  or not such act or  omission  is
otherwise permitted by Lessor or the terms of this Agreement), which will result
in the  disqualification  of any  Equipment  for,  or  recapture  of, all or any
portion of such Tax Benefits.

         (c) If as a  result  of a breach  of any  representation,  warranty  or
covenant of the Lessee  contained  in this  Agreement  or any  Schedule  (x) tax
counsel of Lessor (if  Lessor's  rights  hereunder  are assigned the tax counsel
shall be reasonably  satisfactory  to Lessee) shall determine that Lessor is not
entitled to claim on its Federal income tax return all or any portion of the Tax
Benefits with respect to any Equipment,  or (y) any such Tax Benefit  claimed on
the  Federal  income  tax  return of Lessor is  disallowed  or  adjusted  by the
Internal  Revenue  Service,  or (z)  any  such  Tax  Benefit  is  recomputed  or
recaptured (any such determination,  disallowance,  adjustment, recomputation or
recapture being hereinafter  called a "LOSS"),  then Lessee shall pay to Lessor,
as an indemnity and as additional  rent, such amount as shall, in the reasonable
opinion of Lessor,  cause  Lessor's  after-tax  economic  yields and cash flows,
computed on the same assumptions, including tax rates (unless any adjustment has
been made under Section III hereof, in which case the Effective Rate used in the
next preceding  adjustment shall be substituted),  as were utilized by Lessor in
originally  evaluating the transaction  (such yields and flows being hereinafter
called the "NET  ECONOMIC  RETURN") to equal the Net Economic  Return that would
have been realized by Lessor if such Loss had not occurred.  Notwithstanding the
foregoing a Loss shall not include any determination,  disallowance, adjustment,
recomputation or recapture which is a result of Lessor reporting this Lease as a
capital  lease for Federal  Income Tax  purposes,  for  reasons  other than as a
result of a breach of any  representation,  warranty  or covenant of the Lessee.



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Such amount shall be payable upon demand  accompanied by a statement  describing
in reasonable detail such Loss and the computation of such amount.

         (d) Lessee hereby further  represents,  warrants and covenants that all
amounts  includible in the gross income of Lessor with respect to the Equipment,
and all deductions or credits allowable to Lessor with respect to the Equipment,
will be treated as derived from or allocable to sources within the United States
in each and every  taxable  year of Lessor  throughout  the entire  term of this
Lease. If as a result of any breach of the representation, warranty and covenant
contained the  immediately  preceding  sentence,  any item of income,  credit or
deduction with respect to the Equipment  shall not be treated as derived from or
allocable to, sources with the United States for any taxable year or Lessor (any
such event hereinafter  referred to as a "FOREIGN LOSS"),  then Lessee shall pay
to Lessor as an indemnity, on the next succeeding rental payment date, or in any
event within 30 days after written  demand to Lessee by Lessor,  such amount as,
after  deduction  of all taxes  required  to be paid by Lessor in respect of the
receipt of such amounts under the laws of any federal, state or local government
or taxing authority of the United States, shall equal the sum of: (i) the excess
of (x) the foreign tax credits which Lessor would have been entitled to for such
year had no such Foreign Loss occurred over (y) the foreign tax credits to which
Lessor was limited as a result of such  Foreign  Loss and (ii) the amount of any
interest,  penalties  or  additions  to tax payable as a result of such  Foreign
Loss.

         (e) Lessee further  covenants that it shall be responsible  for paying,
and shall indemnify and hold harmless Lessor from any liability with respect to,
any Tax in respect of the transactions  contemplated by this Lease which results
from a change in Canadian law which,  without  more,  causes Lessor to incur any
Tax attributable  either directly or indirectly to its having or being deemed to
have a permanent  establishment,  residence or place of business or to otherwise
be doing business in Canada.

         (f) If, as a result of the  operation of Section  XV(d) or (e),  Lessee
would be required  to pay any  additional  sums Lessee  shall have the option to
purchase all (but not less than all) of the  Equipment  leased  hereunder for an
amount equal to * ("Purchase Price") as of the Purchase Date (as defined below).
The  "Purchase   Date"  shall  be  the  Rental   Payment  next   succeeding  the
determination  of the Fair Market Value of the Equipment as described in Section
XVIII.  Lessee may exercise this option provided it is not in default  hereunder
and has elected in writing to exercise the option  within  twenty  business days
after  Lessor  has  made  demand  under  Section  XV (d) or (e).  If  Lessee  is
purchasing  the  Equipment  under this  subsection,  Lessee shall pay Lessor the
Purchase  Price  plus any  Rent  then due  prior  to the  Purchase  Date and any
applicable taxes on the Purchase Date.



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         (g) All of Lessor's  rights,  privileges and  indemnities  contained in
this  Section XV shall  survive  the  expiration  or other  termination  of this
Agreement  and the  rights,  privileges  and  indemnities  contained  herein are
expressly  made for the  benefit  of, and shall be  enforceable  by Lessor,  its
successors and assigns.


XVI. DISCLAIMER:  LESSEE ACKNOWLEDGES THAT IT HAS SELECTED THE EQUIPMENT WITHOUT
ANY ASSISTANCE FROM LESSOR,  ITS AGENTS OR EMPLOYEES.  LESSOR DOES NOT MAKE, HAS
NOT  MADE,  NOR  SHALL  BE  DEEMED  TO  MAKE  OR  HAVE  MADE,  ANY  WARRANTY  OR
REPRESENTATION,  EITHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, WITH RESPECT TO THE
EQUIPMENT  LEASED  HEREUNDER  OR  ANY  COMPONENT  THEREOF,  INCLUDING,   WITHOUT
LIMITATION,  ANY WARRANTY AS TO DESIGN, COMPLIANCE WITH SPECIFICATIONS,  QUALITY
OF MATERIALS OR WORKMANSHIP,  MERCHANTABILITY,  FITNESS FOR ANY PURPOSE,  USE OR
OPERATION, SAFETY, PATENT, TRADEMARK OR COPYRIGHT INFRINGEMENT, OR TITLE (except
as provided in Section  XIX(f)).  All such risks,  as between Lessor and Lessee,
are to be borne by Lessee. Without limiting the foregoing,  Lessor shall have no
responsibility or liability to Lessee or any other person with respect to any of
the following, regardless of any negligence of Lessor (i) any liability, loss or
damage caused or alleged to be caused  directly or indirectly by any  Equipment,
any inadequacy thereof,  any deficiency or defect (latent or otherwise) therein,
or any other  circumstance in connection  therewith;  (ii) the use, operation or
performance  of  any  Equipment  or  any  risks  relating  thereto;   (iii)  any
interruption   of  service,   loss  of  business  or   anticipated   profits  or
consequential damages; or (iv) the delivery, operation, servicing,  maintenance,
repair,  improvement or  replacement  of any  Equipment.  If, and so long as, no
default  exists  under this Lease,  Lessee  shall be, and hereby is,  authorized
during the term of this Lease to assert and enforce,  at Lessee's  sole cost and
expense,  from time to time, in the name of and for the account of Lessor and/or
Lessee,  as their  interests may appear,  whatever  claims and rights Lessor may
have against any  Supplier of the  Equipment.  At Lessee's  request and expense,
Lessor agrees to pursue enforcement of any  manufacturer's  warranty that is not
assignable to Lessee.


XVII.  REPRESENTATIONS  AND WARRANTIES OF LESSEE:  Lessee hereby  represents and
warrants to Lessor that on the date hereof and on the date of  execution of each
Schedule:

         (a) Lessee has adequate  power and capacity to enter into,  and perform
under, this Agreement and all related documents (together,  the "Documents") and
is duly  qualified  to do business  wherever  necessary  to carry on its present
business and operations, including the jurisdiction(s) where the Equipment is or
is to be located.

         (b) The Documents have been duly authorized,  executed and delivered by
Lessee and constitute valid, legal and binding agreements of Lessee, enforceable
against Lessee in accordance with their terms, except


[*]    Confidential  information has been omitted and filed  separately with the
       Commission

                                        - 13 -



<PAGE>



to the extent that the enforcement of remedies  therein  provided may be limited
under  applicable  bankruptcy  and  insolvency  laws or similar  laws  affecting
creditor's rights or principles of equity.

         (c) No approval,  consent or withholding of objections is required from
any governmental  authority or instrumentality with respect to the entry into or
performance  by  Lessee  of the  Documents  except  such  as have  already  been
obtained.

         (d) The entry into and performance by Lessee of the Documents will not:
(i) violate any judgment,  order, law or regulation  applicable to Lessee or any
provision of Lessee's Certificate of Incorporation or By-Laws; or (ii) result in
any breach of, constitute a default under or result in the creation of any lien,
charge,  security interest or other  encumbrance upon any Equipment  pursuant to
any indenture,  mortgage,  deed of trust, bank loan or credit agreement or other
instrument (other than this Agreement) to which Lessee is a party.

         (e) There are no suits or proceedings pending or threatened in court or
before any commission, board or other administrative agency against or affecting
Lessee,  which will have a material  adverse  effect on the ability of Lessee to
fulfill its obligations under this Agreement.

         (f) The Equipment  accepted under any  Certificate of Acceptance is and
will remain tangible personal property.

         (g) Each balance sheet and statement of income  delivered to Lessor has
been prepared in accordance with generally accepted accounting  principles,  and
since the date of the most recent such  Balance  Sheet and  Statement of Income,
there has been no material adverse change.

         (h)  Lessee is and will be at all times  validly  existing  and in good
standing under the laws of the jurisdiction of its  incorporation  (specified in
the first sentence of this Agreement).

         (i) The Equipment  will at all times be used for commercial or business
purposes.

         (j) The  Lessee  is and shall  remain a United  States  Federal  Income
Taxpayer.

Notwithstanding  anything in this Agreement,  Schedules or Addendum's  hereto to
the contrary,  Lessee makes no representation or warranty regarding the truth or
accuracy of any financial projections or proformas furnished to Lessor by Lessee
except that the financial projections and proformas were reasonable  projections
of future events based on information  available at the time they were furnished
to Lessor.


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.

                                     - 14 -




<PAGE>


XVIII. PURCHASE OPTION:

         (a) So long as no default  exists  hereunder and the lease has not been
earlier  terminated,  Lessee  may at  lease  expiration,  upon at  least * prior
written notice to Lessor,  purchase all (but not less than all) of the Equipment
in any  Schedule on an AS IS BASIS for cash equal to its then Fair Market  Value
(plus all applicable sales taxes).  Upon receipt of the Fair Market Value,  plus
all applicable sales taxes, Lessor shall execute and deliver to Lessee a bill of
sale, without representation or warranty,  except that the Equipment is free and
clear of any  liens,  claims  or  encumbrances  created  by  Lessor or any party
claiming by,  through or under Lessor and other than those  created by Lessee or
any one claiming by, through or under Lessee.

         (b) "FAIR MARKET VALUE" shall mean the price which a willing buyer (who
is neither a lessee in possession nor a used equipment dealer) would pay for the
Equipment in an arm's-length transaction to a willing seller under no compulsion
to sell; provided, however, that in such determination:  (i) the Equipment shall
be assumed to be in the condition in which it is required to be  maintained  and
returned under this Agreement; (ii) in the case of any installed Equipment, that
Equipment shall be valued on an installed basis; and (iii) costs of removal from
current  location  shall not be a deduction from such  valuation.  If Lessor and
Lessee  are  unable to agree on the Fair  Market  Value at least * before  lease
expiration, Lessor shall appoint an independent appraiser (reasonably acceptable
to Lessee) to  determine  Fair Market  Value,  and that  determination  shall be
final,  binding and conclusive.  Lessee shall bear all costs associated with any
such appraisal.

         (c)  Lessee  shall be  deemed  to have  waived  this  option  unless it
provides Lessor with written notice of its irrevocable  election to exercise the
same within * after Fair Market Value is determined (by agreement or appraisal).


XIX. MISCELLANEOUS:

         (a) LESSEE HEREBY  UNCONDITIONALLY WAIVES ITS RIGHTS TO A JURY TRIAL OF
ANY  CLAIM OR  CAUSE  OF  ACTION  BASED  UPON OR  ARISING  OUT OF,  DIRECTLY  OR
INDIRECTLY,  THIS LEASE,  ANY OF THE RELATED  DOCUMENTS,  ANY  DEALINGS  BETWEEN
LESSEE AND LESSOR  RELATING TO THE  SUBJECT  MATTER OF THIS  TRANSACTION  OR ANY
RELATED TRANSACTIONS,  AND/OR THE RELATIONSHIP THAT IS BEING ESTABLISHED BETWEEN
LESSEE AND LESSOR.  THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL  ENCOMPASSING
OF ANY AND ALL  DISPUTES  THAT  MAY BE FILED IN ANY  COURT  (INCLUDING,  WITHOUT
LIMITATION,  CONTRACT CLAIMS, TORT CLAIMS,  BREACH OF DUTY CLAIMS, AND ALL OTHER
COMMON LAW AND STATUTORY CLAIMS). THIS WAIVER IS IRREVOCABLE MEANING THAT IT MAY
NOT BE MODIFIED  EITHER ORALLY OR IN WRITING,  AND THE WAIVER SHALL APPLY TO ANY
SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS LEASE, ANY


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


                                        - 15 -



<PAGE>



RELATED  DOCUMENTS,  OR TO ANY OTHER  DOCUMENTS OR  AGREEMENTS  RELATING TO THIS
TRANSACTION OR ANY RELATED TRANSACTION.  IN THE EVENT OF LITIGATION,  THIS LEASE
MAY BE FILED AS A WRITTEN CONSENT TO A TRIAL BY THE COURT.

         (b) Unless and until Lessee  exercises  its rights under  Section XVIII
above or any addendum or Schedule hereto, nothing herein contained shall give or
convey to Lessee any right,  title or interest in and to any Equipment except as
a lessee.  Any cancellation or termination by Lessor,  pursuant to the provision
of this Agreement, any Schedule, supplement or amendment hereto, or the lease of
any  Equipment  hereunder,  shall not release  Lessee from any then  outstanding
obligations  to  Lessor  hereunder.  All  Equipment  shall at all  times  remain
personal  property of Lessor  regardless of the degree of its  annexation to any
real property and shall not by reason of any  installation in, or affixation to,
real or personal property become a part thereof.

         (c) each reference contained in this Agreement to:

                               (1) "Adverse Environmental Condition" shall refer
                      to (i) the existence or the continuation of the existence,
                      of   an   Environmental   Emission   (including,   without
                      limitation,   a  sudden  or   non-sudden   accidental   or
                      non-accidental  Environmental  Emission),  of, or exposure
                      to,  any   substance,   chemical,   material,   pollutant,
                      Contaminant,  odor or  audible  noise or other  release or
                      emission  in,  into or  onto  the  environment  (including
                      without limitation, the air, ground, water or any surface)
                      at, in, by,  from or  related to any  Equipment,  (ii) the
                      environmental  aspect  of  the  transportation,   storage,
                      treatment or disposal of materials in connection  with the
                      operation  of any  Equipment  or (iii) the  violation,  or
                      alleged  violation of any  statutes,  ordinances,  orders,
                      rules, regulations, permits or licenses of, by or from any
                      governmental  authority,   agency  or  court  relating  to
                      environmental matters connected with any Equipment.

                               (2) "Affiliate"  shall refer, with respect to any
                      given  Person,  to any Person that  directly or indirectly
                      through  one  or  more  intermediaries,  controls,  or  is
                      controlled  by,  or is under  common  control  with,  such
                      Person.

                               (3) "Contaminant" shall refer to those substances
                      which  are  regulated  by or form the  basis of  liability
                      under any Environmental Law, including without limitation,
                      asbestos,    polychlorinated   biphenyls   ("PBCs"),   and
                      radioactive substances, or other material or



[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


                                        - 16 -



<PAGE>



                      substance  which  has in the past or  could in the  future
                      constitute a health, safety or environmental hazard to any
                      Person, property or natural resources.

                               (4)  "Environmental  Claim"  shall  refer  to any
                      accusation,   allegation,   notice  of  violation,  claim,
                      demand, abatement or other order on direction (conditional
                      or otherwise) by any governmental  authority or any Person
                      for  personal  injury  (including  sickness,   disease  or
                      death),  tangible or intangible property damage, damage to
                      the   environment   or  other   adverse   effects  on  the
                      environment,  or for  fines,  penalties  or  restrictions,
                      resulting  from or based  upon any  Adverse  Environmental
                      Condition.

                               (5)  "Environmental  Emission" shall refer to any
                      actual or threatened release,  spill,  emission,  leaking,
                      pumping,   injection,    deposit,   disposal,   discharge,
                      dispersal,  leaching  or  migration  into  the  indoor  or
                      outdoor  environment,  or  into  or  out  of  any  of  the
                      Equipment,  including, without limitation, the movement of
                      any Contaminant or other substance  through or in the air,
                      soil, surface water, groundwater or property.

                               (6)  "Environmental  Law" shall mean any federal,
                      foreign, state or local law, rule or regulation pertaining
                      to the protection of the environment,  including,  but not
                      limited  to,  the  Comprehensive  Environmental  Response,
                      Compensation,  and  Liability  Act  ("CERCLA")  (42 U.S.C.
                      Section   9601   et   seq.),   the   Hazardous    Material
                      Transportation  Act (49 U.S.C.  Section 1801 et seq.), the
                      Federal  Water  Pollution  Control Act (33 U.S.C.  Section
                      1251 et seq.), the Resource  Conservation and Recovery Act
                      (42 U.S.C.  Section  6901 et seq.),  the Clean Air Act (42
                      U.S.C. Section 7401 et seq.), the Toxic Substances control
                      Act  (15  U.S.C.   Section  2601  et  seq.),  the  Federal
                      Insecticide,  Fungicide,  and  Rodenticide  Act (7  U.S.C.
                      Section  1361 et seq.),  and the  Occupational  Safety and
                      Health Act (19 U.S.C.  section 651 et seq.), as these laws
                      have  been  amended  or  supplemented,  and any  analogous
                      foreign,   federal,  state  or  local  statutes,  and  the
                      regulations promulgated pursuant thereto.

                               (7)  "Environmental  Loss"  shall  mean any loss,
                      cost,  damage,  liability,  deficiency,  fine,  penalty or
                      expense   (including,   without   limitation,   reasonable
                      attorneys'  fees,  engineering  and other  professional or
                      expert fees), investigation, removal, cleanup and remedial
                      costs (voluntarily or involuntarily incurred) and damages


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


                                        - 17 -



<PAGE>



                      to,  loss  of  the  use of or  decrease  in  value  of the
                      Equipment  arising  out  of  or  related  to  any  Adverse
                      Environmental Condition.

                               (8)     "Person"  shall include  any  individual,
                      partnership,     corporation,    trust,     unincorporated
                      organization, government or department  or agency  thereof
                      and any other entity.


         (c) Time is of the essence of this Agreement.  Lessor's  failure at any
time to require strict  performance  by Lessee of any of the  provisions  hereof
shall  not  waive  or  diminish  Lessor's  right  thereafter  to  demand  strict
compliance  therewith.  Lessee  agrees,  upon Lessor's  request,  to execute any
instrument  necessary  or expedient  for filing,  recording  or  perfecting  the
interest of Lessor.  All notices  required to be given hereunder shall be deemed
adequately given if sent by registered or certified mail to the addressee at its
address  stated  herein,  or at such  other  place  as such  addressee  may have
designated  in writing.  This  Agreement,  commitment  letter (if any),  and any
Schedule and Annexes thereto constitute the entire agreement of the parties with
respect to the subject  matter  hereof.  NO  VARIATION OR  MODIFICATION  OF THIS
AGREEMENT OR ANY WAIVER OF ANY OF ITS PROVISIONS OR  CONDITIONS,  SHALL BE VALID
UNLESS IN WRITING  AND SIGNED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE  PARTIES
HERETO.

                                       /s/RLD  /s/LJH
                                       ---------------------------
                                       initials

         (d) In case of a failure of Lessee to comply with any provision of this
Agreement,  Lessor shall have the right,  but shall not be obligated  to, effect
such compliance,  in whole or in part upon at least 10 days prior written notice
to Lessee; and all moneys spent and expenses and obligations incurred or assumed
by Lessor in effecting such compliance shall  constitute  additional rent due to
Lessor within five days after the date Lessor sends notice to Lessee  requesting
payment.  Lessor's  effecting such compliance  shall not be a waiver of Lessee's
default.

         (e) Any rent or other  amount  not paid to  Lessor  when due  hereunder
shall bear interest,  both before and after any judgment or termination  hereof,
at the lesser of * per annum or the maximum rate allowed by law. Any  provisions
in this Agreement and any Schedule  which are in conflict with any statute,  law
or  applicable  rule  shall be deemed  omitted,  modified  or altered to conform
thereto.


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.



                                        - 18 -



<PAGE>



              (f) So long as Lessee  shall not be in default  hereunder,  Lessor
     warrants to Lessee that Lessee  shall be entitled to possess  quietly  each
     unit of  Equipment,  and that  neither  Lessor nor any party  claiming  by,
     through  or under  Lessor  shall  interfere  with  Lessee's  right of quiet
     possession during the term hereof.

              (g) If there is any conflict  between the terms of this Agreement,
     any Schedule and any  Addendum(s) to this  Agreement or such Schedule,  the
     terms of the  Schedule  shall  prevail  over this  Agreement,  and any such
     Addendum(s) shall prevail over this Agreement and the Schedule.

              (h)  *

         IN WITNESS WHEREOF,  Lessee and Lessor have caused this Agreement to be
executed  by their duly  authorized  representatives  as of the date first above
written.


     LESSOR:                                    LESSEE:
     GENERAL ELECTRIC CAPITAL CORPORATION       NORTH AMERICAN VACCINE, INC.

     By: /s/ R. L. Dauphinais                   By: /s/ Lawrence J. Hineline
         --------------------------------           --------------------------

     Title: Sr. Trans. Manager                  Title: Vice President - Finance
            -----------------------------              ------------------------














[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


                                        - 19 -



<PAGE>


                                  SCHEDULE NO.  001
                            DATED THIS November 1,  1996
                              TO MASTER LEASE AGREEMENT
                                DATED AS OF 11/1, 1996

Lessor & Mailing Address:                         Lessee & Mailing Address:

GENERAL ELECTRIC CAPITAL CORPORATION              NORTH AMERICAN VACCINE, INC.
4 North Park Drive                                12103 Indian Creek Court
Suite 500                                         Beltsville, Maryland 20705
Hunt Valley, Maryland 21030

Capitalized terms not defined herein shall have the meanings assigned to them in
the Master Lease Agreement  identified  above  ("Agreement";  said Agreement and
this Schedule being collectively referred to as "Lease").

     A.       Equipment
              ---------

              Pursuant  to the  terms of the  Lease,  Lessor  agrees to lease to
              Lessee the Equipment  listed on Annex A attached hereto and made a
              part hereof.  Such  Equipment was  previously  leased by Lessor to
              Cephalon,   Inc.   ("Cephalon")   as  part  of  a   sale-leaseback
              transaction.   Lessor  represents  and  warrants  to  Lessee  that
              Cephalon's   leasehold  interest  in  and  to  the  Equipment  has
              terminated.  Lessor  purchased the Equipment from Cephalon and has
              not transferred its interest in the Equipment.

     B.       Financial Terms
              ---------------

              1.  Advance Rent (if any):  $   N/A
              2.  Capitalized Lessor's Cost:  $ 7,664,605
              3.  Basic Term Lease Rate Factor:  *
              4.  Daily Lease Rate Factor:   *
              5.  Basic Term  (No.  of Months):    48
              6.  Basic Term  Commencement Date:  November  1, 1996
              7.  Equipment Location:  *
              8.  Lessee  Federal Tax  ID No.:  98-0121241
              9.  Supplier:  N/A
              10. Last Delivery Date:  N/A

     C.       Tax Benefits
              ------------
              Depreciation Deductions:
              a.  Depreciation Method:  *
              b.  Recovery Period: *
              c.  Basis: *
              d.  This Equipment  has been Leased to  a non  related third party
              from  December  29, 1994 until  October  31,  1996.  The  Lessee's
              representations regarding items a, b and c in this Section C shall
              be limited to such Tax  Benefits  that remain from the date hereof
              through the end of the Term.



[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>


     D.       Term and Rent
              -------------

              1. Basic Term Rent. Commencing on November 1, 1996 and on the same
              day of each month thereafter  (each, a "Rent Payment Date") during
              the Basic Term,  Lessee  shall pay as rent ("Basic Term Rent") the
              product  of the  Basic  Term  Lease  Rate  Factor  times  the then
              Capitalized Lessor's Cost of all Equipment on this Schedule.

     E.       Insurance
              ---------

              1.    Public Liability:  $1MM total liability per occurrence.
              2.    Casualty  and Property Damage:   An  amount equal to the
                    higher  of  the  Stipulated  Loss  Value   or  the  full
                    replacement cost of the Equipment.

Except as expressly  modified hereby,  all terms and provisions of the Agreement
shall remain in full force and effect. This Schedule is not binding or effective
with respect to the  Agreement or Equipment  until  executed on behalf of Lessor
and Lessee by authorized representatives of Lessor and Lessee, respectively.

         IN WITNESS  WHEREOF,  Lessee and Lessor have caused this Schedule to be
executed  by their duly  authorized  representatives  as of the date first above
written.


LESSOR:                                    LESSEE:

GENERAL ELECTRIC CAPITAL                   NORTH  AMERICAN  VACCINE, INC.
CORPORATION

By:  /s/ R. L. Dauphinais                  By:  /s/ Lawrence J. Hineline
     ----------------------                    ---------------------------

Name:  R. L. Dauphinais                    Name: Lawrence J. Hineline
     ----------------------                     --------------------------

Title:  Sr. Trans. Manager                 Title: Vice President - Finance
       --------------------                       ------------------------



<PAGE>


                                       ANNEX A
                                          TO
                                  SCHEDULE NO.  001
                              TO MASTER LEASE AGREEMENT
                             DATED AS OF NOVEMBER 1, 1996



                 SERIAL NUMBER             NUMBER           COST
MANUFACTURER     TYPE/MODEL                OF UNITS         PER UNIT



                      *

























Initials:
/s/ RLD                                    /s/ LJH
- --------------------------                 ------------------------------
Lessor                                     Lessee






[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>


                                     ANNEX C
                                       TO
                                SCHEDULE NO. 001
                            TO MASTER LEASE AGREEMENT

                          DATED AS OF NOVEMBER 1, 1996

                            CERTIFICATE OF ACCEPTANCE
                            -------------------------




To: General Electric Capital Corporation ("Lessor")

         Pursuant  to  the   provisions   of  the  above   schedule   and  lease
(collectively,  the "Lease",),  Lessee hereby certifies and warrants that Lessee
accepts the Equipment for all purposes of the Lease and all attendant documents.

         Lessee does  further  certify  that as of the date hereof (i) Lessee is
not in default under the Lease; and (ii) the representations and warranties made
by  Lessee  pursuant  to or under the  Lease  are true and  correct  on the date
hereof.

                            /s/ Lawrence J. Hineline, Vice President-Finance
                            -------------------------------------------------
                            Lessee's Authorized Representative



Dated:  November 12, 1996


<PAGE>

                           ANNEX D TO SCHEDULE NO. 001
                            TO MASTER LEASE AGREEMENT
                          DATED AS OF November 1, 1996

                          STIPULATED LOSS VALUE TABLE*
                          ----------------------------


     Nov-01-96                        1                          *
     Dec-01-96                        2                          *
     Jan-01-96                        3                          *
     Feb-01-97                        4                          *
     Mar-01-97                        5                          *
     Apr-01-97                        6                          *
     May-01-97                        7                          *
     Jun-01-97                        8                          *
     Jul-01-97                        9                          *
     Aug-01-97                       10                          *
     Sep-01-97                       11                          *
     Oct-01-97                       12                          *
     Nov-01-97                       13                          *
     Dec-01-97                       14                          *
     Jan-01-98                       15                          *
     Feb-01-98                       16                          *
     Mar-01-98                       17                          *
     Apr-01-98                       18                          *
     May-01-98                       19                          *
     Jun-01-98                       20                          *
     Jul-01-98                       21                          *
     Aug-01-98                       22                          *
     Sep-01-98                       23                          *
     Oct-01-98                       24                          *
     Nov-01-98                       25                          *
     Dec-01-98                       26                          *
     Jan-01-99                       27                          *
     Feb-01-99                       28                          *
     Mar-01-99                       29                          *
     Apr-01-99                       30                          *
     May-01-99                       31                          *
     Jun-01-99                       32                          *
     Jul-01-99                       33                          *
     Aug-01-99                       34                          *
     Sep-01-99                       35                          *
     Oct-01-99                       36                          *
     Nov-01-99                       37                          *
     Dec-01-99                       38                          *
     Jan-01-00                       39                          *
     Feb-01-00                       40                          *
     Mar-01-00                       41                          *

[*]    Confidential  information has been omitted and filed  separately with the
       Commission.
<PAGE>



     DATE                         PAYMENT #             STIPULATED LOSS VALUE
     ----                         ---------             ---------------------

     Apr-01-00                       42                          *
     May-01-00                       43                          *
     Jun-01-00                       44                          *
     Jul-01-00                       45                          *
     Aug-01-00                       46                          *
     Sep-01-00                       47                          *
     Oct-01-00                       48                          *

         * The Stipulated Loss Value for any unit of Equipment shall be equal to
the  Capitalized  Lessor's  Cost  of such  unit  multiplied  by the  appropriate
percentage  derived from the above table. In the event that the Lease is for any
reason  extended,  then the last  percentage  figure  shown above shall  control
throughout any such extended term.

         Note:  The  Capitalized  Lessors  Cost of any line item of equipment in
Annex A shall  be  equal to the  dollar  volume  in the  column  labeled  "Total
Funding"  on page 1 of Annex A or "Net Book  Value" on pages 2 - 21 (as the case
may be) multiplied by *

                      Initials:  /s/ RLD                /s/  LJH
                                ------------------      ------------------
                               Lessor                   Lessee




























     [*]      Confidential information  has  been omitted  and filed  separately
              with the Commission.


<PAGE>

                                 ADDENDUM NO. 1
                            TO MASTER LEASE AGREEMENT
                          DATED AS OF NOVEMBER 1, 1996

THIS ADDENDUM (this  "ADDENDUM")  amends and  supplements  the above  referenced
lease (the "Lease"), between GENERAL ELECTRIC CAPITAL CORPORATION ("LESSOR") and
NORTH AMERICAN  VACCINE,  INC.  ("LESSEE") and is hereby  incorporated  into the
Lease as though fully set forth therein. Capitalized terms not otherwise defined
herein shall have the meanings set forth in the Lease.

The Lease is hereby amended as follows:

          1.    XXI.  FINANCIAL COVENANTS.

               (a) At all  times  during  the term of the  Lease,  Lessee  shall
maintain:  (i)  Tangible  Net Worth of * (ii) A Current  Ratio of *; (iii) Total
Liabilities to Tangible Net Worth of *; (iv) unrestricted cash, cash equivalents
and/or marketable securities (collectively  "UNRESTRICTED CASH") of * or, Lessee
shall  within  fifteen  (15) days after  Lessee  ceases to  satisfy  any of such
requirements  cause to be delivered to Lessor an  irrevocable  standby letter of
credit as described in Section  XXI(c)  below.  "TOTAL  LIABILITIES"  shall mean
Lessee's total liabilities less convertible  subordinated debt and "TANGIBLE NET
WORTH"  shall mean  Lessee's  tangible net worth plus  convertible  subordinated
debt.  Unrestricted  Cash  shall  be  shown  net  of  any  contingent  liability
associated with other lease cash triggers or pledge  agreements  unless Lessee's
obligations  under these agreements are deemed by Lessor to be less restrictive.
"CURRENT RATIO" shall mean current assets divided by current liabilities. Except
as defined  herein,  accounting  terms used herein shall be as defined,  and all
calculations hereunder shall be made, in accordance with GAAP.

               (b) Lessee's chief  financial  officer shall notify Lessor of the
amount of Lessee's  Unrestricted Cash and shall certify that such amounts are in
compliance with the requirements of Section XXI(a) above,  such notification and
certification  shall be provided  within fifteen (15) days after the end of each
month,  reflecting  such  information  as of the  end of the  month  immediately
preceding such month.  Lessee's chief financial officer shall also notify Lessor
the amount of Lessee's  Tangible Net Worth,  Total  liabilities  to Tangible Net
Worth  ratio and  Current  Ratio,  and shall  certify  that such  amounts are in
compliance with the requirements of Section XXI(a) above,  such notification and
certification  shall be provided  within fifteen (15) days after the end of each
month,  reflecting  such  information  as of the  end of the  month  immediately
preceding  such  month.  If Lessee is unable  or fails  timely to  provide  such
notification  and compliance  certificates,  within fifteen (15) days after such
failure,  Lessee shall cause to be delivered  to Lessor an  irrevocable  standby
letter of credit as described in Section  XXI(c) below  ("Letter of Credit").  A
failure by Lessee to provide such Letter of Credit or otherwise comply with this
Section XXI shall be a default hereunder.

               (c) The irrevocable standby letter of credit provided pursuant to
this Addendum shall be *


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>


         2.   XXII. FINANCIAL COVENANTS RELEASE.

              At any time if Lessee is not in default, Lessee may provide Lessor
with a letter of credit  substantially  in the form of Exhibit A attached hereto
(or such other form as may be acceptable to Lessor in its sole discretion) equal
to * . Upon providing this Letter of Credit,  the Financial  Covenants stated in
Section XXI and Lessee's  obligations  under those  Financial  Covenants will be
considered in abeyance,  except as described  further in this paragraph.  Lessee
may later  request  in  writing  that  Lessor  return  the  Letter of Credit and
re-instate  the  financial  covenants.  Lessor  agrees to do so as long as:  (1)
Lessee is not in default;  (2) a default by Lessee is not reasonably imminent in
the  judgment of Lessor;  and (3) Lessee  would not have been in default had the
Financial Covenants not been put into abeyance. Lessee may exercise its right to
provide a letter of credit as  described in this Section XXII * times during the
term of the Lease.

         Except as expressly  modified  hereby,  all terms and provisions of the
Lease shall  remain in full force and effect.  This  Addendum is not binding nor
effective with respect to the Lease or the Equipment until executed on behalf of
Lessor and Lessee by authorized representatives of Lessor and Lessee.

IN WITNESS  WHEREOF,  Lessee and Lessor have caused this Addendum to be executed
by their duly authorized representatives as of the date first above written.

LESSEE:                                    LESSOR:

NORTH AMERICAN VACCINE, INC.               GENERAL ELECTRIC CAPITAL CORPORATION

By: /s/ Lawrence J. Hineline               By: /s/ R. L. Dauphinais
    --------------------------                 ---------------------
Its: Vice President - Finance              Its: Sr. Trans Manager
    -------------------------                  ---------------------
Dated:  November 12, 1996                  Dated: November 12,1996
       -----------------------                    ------------------














[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>


                                 ADDENDUM NO. 1
                               TO SCHEDULE NO. 001
                            TO MASTER LEASE AGREEMENT
                          DATED AS OF NOVEMBER 1, 1996

         This  ADDENDUM  (this  "Addendum")  amends  and  supplements  the above
referenced  schedule  (the  "Schedule")  to  the  above  referenced  lease  (the
"Lease"),  between GENERAL  ELECTRIC  CAPITAL  CORPORATION  ("Lessor") and NORTH
AMERICAN VACCINE,  INC.  ("Lessee") and is hereby incorporated into the Schedule
as though  fully set forth  therein.  Capitalized  terms not  otherwise  defined
herein shall have the meanings set forth in the Lease.

1.       For  purposes  of this  Schedule  only,  Section  XVIII of the Lease is
amended by deleting and replaced with the following:

         EARLY PURCHASE OPTION.

                    (a)   Provided   that  the  Lease  has  not  been  earlier
         terminated and provided further that Lessee is not in default under the
         Lease or any other  agreement  between  Lessor and Lessee,  Lessee may,
         UPON AT LEAST * PRIOR WRITTEN NOTICE TO LESSOR OF LESSEE'S  IRREVOCABLE
         ELECTION TO EXERCISE SUCH OPTION,  purchase all (but not less than all)
         of the  Equipment  listed and  described  in this  Schedule on the rent
         payment date (the "Early  Purchase Date") * for a price equal to * (the
         "FMV Early Option Price"),  plus all applicable sales taxes on an AS IS
         BASIS.  Lessor and Lessee  agree that the FMV Early  Option  Price is a
         reasonable prediction of the Fair Market Value (as such term is defined
         in Section  XVIII(b) hereof) of the Equipment at the time the option is
         exercisable.   Lessor  and  Lessee  agree  that  if  Lessee  makes  any
         non-severable improvement to the Equipment which increases the value of
         the Equipment and is not required or permitted by Sections VII or XI of
         the Lease  prior to lease  expiration,  then at the time of such option
         being  exercised,  Lessor and Lessee shall adjust the purchase price to
         reflect  any  addition  to the price  anticipated  to result  from such
         improvement.  (The purchase option granted by this subsection  shall be
         referred to herein as the "Early Purchase Option".)

                    (b) If Lessee  exercises  its Early  Purchase  Option with
         respect to the Equipment leased  hereunder,  then on the Early Purchase
         Option Date, Lessee shall pay to Lessor any Rent and other sums due and
         unpaid on the Early  Purchase  Option Date and Lessee shall pay the FMV
         Early Option Price, plus all applicable sales taxes, to Lessor in cash.
         Upon receipt of the Fair Market Value, plus all applicable sales taxes,
         Lessor  shall  execute  and  deliver to Lessee a bill of sale,  without
         representations  or  warranty,  except that the  Equipment  is free and
         clear of any  liens,  claims or  encumbrances  created by Lessor or any
         party claiming by, through or under Lessor and other than those created
         by Lessee or anyone claiming by, through or under Lessee.

2.       For purposes of this Schedule only, the following  additional Financial
         Terms are added to Paragraph B of the Schedule:

         *


[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>



3.       For purposes of this Schedule only, the following is added to Paragraph
         D of the Schedule:

               4.  Secondary  Term Rent.  Unless the  Schedule  has been earlier
         terminated  as  provided  therein,  commencing  on the  Secondary  Term
         Commencement Date and on the same day of each month thereafter (each, a
         "Rent Payment  Date",) during the Secondary  Term,  Lessee shall pay as
         rent  ("Secondary  Term Rent",) the product of the Secondary Term Lease
         Rate Factor times the  Capitalized  Lessor's  Cost of all  Equipment on
         this Schedule.

4.   For purposes of this Schedule only, Section  XVIII(a) of the  Agreement is
hereby deleted in its entirety and the following is substituted therefor:

              (a) So long as no default  exists  hereunder and the Lease has not
           been  earlier  terminated,  Lessee  may  at  the  expiration  of  the
           Secondary  Term  upon at  least * prior  written  notice  to  Lessor,
           purchase  all  (but  not  less  than  all) of the  Equipment  in this
           Schedule  on an AS IS BASIS,  for cash equal to its then Fair  Market
           Value (plus all applicable sales taxes).

5.    For purposes of this Schedule  only,  the  following  is added to the end
thereof:

END OF BASIC TERM OPTIONS:

         At the expiration of the Basic Term (the "Basic Term Expiration Date"),
so  long as no  default  has  occurred  and is  continuing  hereunder  and  this
Agreement  has not been earlier  terminated,  Lessee  shall  exercise one of the
following options:

                      (i) EXTENSION  OPTION.  Lessee may extend the Lease beyond
           the Basic Term Expiration Date with respect to all (but not less than
           all) of the Equipment  covered by this Schedule through the Secondary
           Term set forth in this Schedule and Lessee shall pay  Secondary  Term
           Rent as set forth in this Schedule.

                      (ii) PURCHASE  OPTION.  Upon at least * written  notice to
           Lessor prior to the  expiration of the Basic Term,  purchase all (but
           not less than all) of the Equipment covered by this Schedule on an AS
           IS WHERE IS basis  without  representation  or  warranty,  express or
           implied ("AS IS BASIS",) for cash equal to * which amount  Lessor and
           Lessee agree is a reasonable  prediction of the Fair Market Value (as
           such term is defined in Section  XVIII(b) hereof except that it shall
           be the Lessee's right to choose an independent qualified appraiser if
           the  parties  can't  agree  as to the  Fair  Market  Value  and  such
           appraiser's  determination of FMV shall be final and binding upon the
           parties)  of the  Equipment  at the time the  option is  exercisable.
           



[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>



           Lessor  and  Lessee  agree  that if Lessee  makes  any  non-severable
           improvement  to  the  Equipment  which  increases  the  value  of the
           Equipment  and is not  required or permitted by Sections VII or XI of
           the Lease prior to lease expiration, then at the time of the exercise
           of this option,  Lessor and Lessee shall adjust the purchase price to
           reflect  any  addition to the price  anticipated  to result from such
           improvement.  On the Basic Term Expiration Date, Lessor shall receive
           in cash the full  purchase  price (plus all  applicable  sales taxes)
           together with any Rent or other sums then due under the Lease on such
           date.  Lessee  shall be deemed to have waived this option if it fails
           to timely  provide  Lessor with the  required  written  notice of its
           election  to  exercise  the same or unless it  provides  Lessor  with
           written  notice of its  irrevocable  election  to  exercise  the same
           within * after Fair  Market  Value is  determined  (by  agreement  or
           appraisal).

         Except as expressly  modified  hereby,  all terms and provisions of the
Lease shall  remain in full force and effect.  This  Addendum is not binding nor
effective with respect to the Lease or the Equipment until executed on behalf of
Lessor and Lessee by authorized representatives of Lessor and Lessee.

         IN WITNESS  WHEREOF,  Lessee and Lessor have caused this Addendum to be
executed  by their duly  authorized  representatives  as of the date first above
written.

LESSOR:                                           LESSEE:

GENERAL ELECTRIC CAPITAL CORPORATION              NORTH AMERICAN VACCINE, INC.

By: /s/ R. L. Dauphinais                          By: /s/ Lawrence J. Hineline
- -----------------------------------                   --------------------------

Its: Sr. Trans. Manager                           Its: Vice President - Finance
- -----------------------------------                    ------------------------





[*]    Confidential  information has been omitted and filed  separately with the
       Commission.


<PAGE>

                           ADDENDUM NO. 2 TO SCHEDULE NO. 1
                              TO MASTER LEASE AGREEMENT
                             DATED AS OF NOVEMBER 1, 1996


         THIS ADDENDUM amends and supplements the above referenced schedule (the
"Schedule")  to the above  referenced)  lease  (the  "Lease"),  between  GENERAL
ELECTRIC  CAPITAL  CORPORATION  ("Lessor")  and NORTH  AMERICAN  VACCINE,  INC..
("Lessee")  and is hereby  incorporated  into the  Schedule as though  fully set
forth  therein.  Capitalized  terms not otherwise  defined herein shall have the
meanings set forth in the Lease.

         For the purposes of this Schedule only Section XI is hereby  amended as
follows:

RETURN  PROVISIONS:  In addition to the  provisions of Section XI of this Lease,
and provided  that Lessee has not elected to exercise its option to purchase the
Equipment, Lessee shall, at its expense:

         (a) At least  ninety  (90) days and not more than two hundred ten (210)
days prior to expiration or earlier termination of the Lease,  provide to Lessor
a detailed  inventory of all components of the Equipment.  The inventory  should
include,  but not be limited  to, a listing of model and serial  numbers for all
components comprising the Equipment.

         (b)  At  least  ninety  (90)  days  prior  to   expiration  or  earlier
termination  of the  Lease,  with  reference  to  computer  and  computer  based
equipment comprising the Equipment,  provide to Lessor a detailed listing of all
internal  circuit  boards by both the model and serial  number for all  hardware
comprising  the  Equipment  and  a  listing  of  all  software  features  listed
individually.

         (c)  At  least  ninety  (90)  days  prior  to   expiration  or  earlier
termination of the Lease, upon receiving reasonable notice from Lessor,  provide
or cause the  vendor(s) or  manufacturer(s)  to provide to Lessor the  following
documents:  (1) one set of service manuals,  blue prints,  process flow diagrams
and operating manuals including replacements and/or additions thereto, such that
all  documentation  is  completely  up-to-date;  and (2)  one set of  documents,
detailing equipment configuration,  operating requirements, maintenance records,
and other  technical data  concerning the set-up and operation of the Equipment,
including  replacements and/or additions thereto, such that all documentation is
completely up-to-date.

         (d)  At  least  ninety  (90)  days  prior  to   expiration  or  earlier
termination of the Lease, upon receiving reasonable notice from Lessor, make the
Equipment available for on-site operational inspections by potential purchasers,
above  ground  and  under  power,  and  provide   personnel,   power  and  other
requirements  necessary to  demonstrate  electrical,  mechanical and bio reactor
systems for each item of the  Equipment;  provided  however,  that such  persons
shall comply with any  reasonable  conditions  imposed by Lessee  regarding such
inspection of Equipment in Lessee's manufacturing areas.


<PAGE>


         (e)  At  least  ninety  (90)  days  prior  to   expiration  or  earlier
termination of the Lease, cause the manufacturer's representative or a qualified
equipment maintenance provider, acceptable to Lessor, to perform a comprehensive
physical  inspection,  including  testing all  material and  workmanship  of the
Equipment;  and if during such inspection,  examination and test, the authorized
inspector  finds any of the  material  or  workmanship  to be  defective  or the
Equipment not operating within the  manufacturer's  specifications,  then Lessee
shall repair or replace such defective  material and, after corrective  measures
are completed,  Lessee will provide for a follow-up  inspection of the Equipment
by the authorized inspector as outlined in the preceding clause.

         (f) Have each item of Equipment returned with an in-depth field service
report detailing said inspection as outlined in Section e of this Addendum.  The
report shall certify that the Equipment  has been properly  inspected,  examined
and tested and is operating within the manufacturer's specifications.

         (g)  Provide  that  all  Equipment  will be  cleaned  and  cosmetically
acceptable,  and in such condition so that it may be  immediately  installed and
placed into use in a similar environment.

         (h) Properly remove or treat all rust or corrosion.

         (i)  Ensure  all  items  of  Equipment,  where  appropriate,   will  be
completely sterilized, steam-cleaned and de-greased upon redelivery.

         (j)  Properly  remove  all  Lessee  installed  markings  which  are not
necessary  for  the  installation,  operation,  maintenance  or  repair  of  the
Equipment.

         (k)  Ensure  all  Equipment  and  equipment  operations  conform to all
applicable  local,  state,  and  federal  laws,  health  and  safety  guidelines
(including the then U.S. Food and Drug Administration regulations).

         (l) Ensure the Equipment shall be mechanically and structurally  sound,
capable of performing  the  functions  for which the  Equipment  was  originally
designed,  in  accordance  with the  manufacturer's  published  and  recommended
specifications.

         (m)  Provide  for  the  deinstallation,   packing,   transporting,  and
certifying  of the Equipment to include,  but not be limited to, the  following:
(1) the manufacturer's  representative shall de-install all Equipment (including
all wire, cable and mounting  hardware) in accordance with the specifications of
the manufacturer; (2) each item of Equipment will be returned with a certificate
supplied by the manufacturer's  representative qualifying the Equipment to be in
good  condition  and (where  applicable)  to be eligible for the  manufacturer's
maintenance  plan;  the  certificate  of eligibility  shall be  transferable  to
another  operator of the Equipment;  (3) the Equipment  shall be packed properly
and in accordance to the  manufacturer's  recommendations;  and (4) Lessee shall
transport  the  Equipment  in  a  manner  consistent  with  the   manufacturer's
recommendations and practices.


<PAGE>

         (n) Provide for the  deinstallation  and  packing of the  Equipment  to
include,  but not be limited to, the following:  (1) all process fluids shall be
removed from the Equipment  and disposed of in accordance  with the then current
waste  disposal laws and  regulations.  At no time are materials  which could be
considered  hazardous  waste by any  regulatory  authority  to be  shipped  with
machinery;  (2) all internal  fluids such as lube oil and hydraulic fluid are to
be filled to operating  levels;  filler caps are to be secured and  disconnected
hoses are to be sealed to avoid spillage; (3) the manufacturer's  representative
shall  deinstall  all  Equipment in accordance  with the  specifications  of the
manufacturer;  and (4) the Equipment  shall be packed properly and in accordance
with the manufacturer's recommendations.

         (o) Upon sale of the Equipment to a third party, provide transportation
to not more  than  three (3)  individual  locations  anywhere  within a 500 mile
radius of the original Equipment location elected by Lessor.

         (p) Obtain and pay for a policy of transit insurance for the redelivery
period in an amount equal to the  replacement  value of the Equipment and Lessor
shall be named as the loss payee on all such policies of insurance.

         (q) With regard to any Equipment that has been modified or reconfigured
by Lessee,  return or restore the  Equipment to its original  configuration,  as
specified  by  the  manufacturer   including  all  upgrades   installed  by  the
manufacturer.

         Except as expressly  modified  hereby,  all terms and provisions of the
Lease  shall  remain in full force and effect.  This  Addendum is not binding or
effective with respect to the Lease or the Equipment until executed on behalf of
Lessor and Lessee by authorized representatives of Lessor and Lessee.

         IN WITNESS  WHEREOF,  Lessee and Lessor have caused this Addendum to be
executed  by their duly  authorized  representatives  as of the date first above
written.

LESSOR:                                      LESSEE:

GENERAL ELECTRIC CAPITAL CORPORATION         NORTH AMERICAN VACCINE, INC.


By: /s/ R. L. Dauphinais                      By: /s/ Lawrence J. Hineline
    -------------------------                     --------------------------

Name: R. L. Dauphinais                        Name: Lawrence J. Hineline
      -----------------------                       ------------------------

Title: Sr. Trans Manager                      Title: Vice President - Finance
       ----------------------                       -------------------------



                                                                      Exhibit 23


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


         As   independent   public   accountants,   we  hereby  consent  to  the
incorporation  of our report  included in this Annual Report on Form 10-K,  into
(i) the Company's  previously  filed  Registration  Statements on Form S-8, File
Nos. 33-37325, 33-39416, 33-48752, 33-48753 and 33-80479, and (ii) the Company's
previously filed Registration Statement on Form S-3, File No. 333-8851.



                                           /s/ ARTHUR ANDERSEN LLP
                                           --------------------------
                                           ARTHUR ANDERSEN LLP




Washington, D.C.
March 6, 1997




<TABLE> <S> <C>


<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31,
1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                          70,881
<SECURITIES>                                     1,281
<RECEIVABLES>                                    4,166
<ALLOWANCES>                                         0
<INVENTORY>                                      1,782
<CURRENT-ASSETS>                                77,362
<PP&E>                                          56,365
<DEPRECIATION>                                  15,736
<TOTAL-ASSETS>                                 122,962
<CURRENT-LIABILITIES>                           10,948
<BONDS>                                         86,250
                                0
                                      6,538
<COMMON>                                        71,357
<OTHER-SE>                                    (58,116)
<TOTAL-LIABILITY-AND-EQUITY>                   122,962
<SALES>                                            892
<TOTAL-REVENUES>                                10,548
<CGS>                                                0
<TOTAL-COSTS>                                   33,111
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               4,088
<INCOME-PRETAX>                               (19,489)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (19,489)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (19,489)
<EPS-PRIMARY>                                   (0.63)
<EPS-DILUTED>                                   (0.63)
        


</TABLE>


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