[LOGO]IGEN INTERNATIONAL, INC.
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16020 Industrial Drive,                    Phone:  (301) 869-9800,
Gaithersburg, Maryland  20877 USA          Fax:  (301) 208-3798


FOR IMMEDIATE RELEASE

                                                                  
CONTACTS:
George Migausky                    Jonathan Fassberg (investors)        Paul Caminiti or Andrew Cole (media)
IGEN International                 The Trout Group                      Citigate Sard Verbinnen
(301) 869-9800, ext. 2013          (212) 477-9007, ext. 16              (212) 687-8080



                   IGEN AWARDED $505 MILLION IN ROCHE LAWSUIT

     JURY ALSO CONFIRMS IGEN'S RIGHTS TO KEY ROCHE DIAGNOSTICS PRODUCT LINE
                AND PERMITS IGEN TO TERMINATE LICENSE WITH ROCHE

GAITHERSBURG,  MD, JANUARY 10, 2002 --IGEN  International,  Inc. (Nasdaq:  IGEN)
announced today that a jury has awarded IGEN $505 million in damages in its case
against  Roche  Diagnostics,  a division of F.  Hoffmann-La  Roche (OTC Bulletin
Board:  RHHBY).  The jury also  confirmed  IGEN's  rights to Roche's  Elecsys(R)
diagnostics  product line, which was developed by Roche using IGEN's proprietary
ORIGEN biological  detection  technology,  as well as to other improvements.  In
addition,  the jury's  findings  permit IGEN to terminate its license  agreement
with Roche, which allows Roche to use ORIGEN in its diagnostics products.

Following a 10 week jury trial before the U.S.  District  Court for the District
of  Maryland,  an  11-member  jury  unanimously  found Roche to have  materially
breached the license agreement, violated its duty to IGEN of good faith and fair
dealing,  and engaged in unfair competition against IGEN. The jury ordered Roche
to pay IGEN $105  million in  compensatory  damages and $400 million in punitive
damages.

The jury also confirmed IGEN's right to Roche products, including the Elecsys(R)
1010, 2010 and E170 lines of clinical diagnostic  immunoassay  analyzers and the
tests  developed  for use on those  systems  (including  tests for  thyroid  and
reproductive   hormones   and   markers  for  cancer,   cardiac   disease,   and
osteoporosis).  IGEN is also  entitled to certain  other  technologies  owned or
developed by Roche, including PCR, a nucleic acid amplification technology.

"This verdict is a tremendous victory for IGEN and its shareholders,  and we are
pleased  that the jury  concurred  with our view that  Roche has  engaged  in an
egregious  pattern of  misconduct  over the years," said Samuel J.  Wohlstadter,
IGEN's Chairman and Chief Executive Officer. "Most importantly, it restores many
fundamental rights Roche improperly denied IGEN under the license agreement.  It
also sets the stage for IGEN to compete in all  diagnostic  markets,  by opening
doors to the multi-billion dollar immunoassay and molecular probe markets. Using
our own  proprietary  products,  as well as the Elecsys product line and related
assays and  improvements,  we can pursue  opportunities  in clinical  diagnostic



markets worldwide,  either directly or through business  arrangements with third
parties."

In their verdict today, the 11-member jury unanimously  found Roche breached the
license agreement by:

|_|  Failing to keep full and accurate records necessary to calculate  royalties
     due to IGEN, by  improperly  calculating  royalties,  by failing to provide
     full,  accurate and  comprehensible  sales  reports and /or by  underpaying
     royalties.

|_|  Placing  products  based on IGEN's  technology  with  customers  other than
     hospitals, clinical reference laboratories and blood banks, the only fields
     permitted by the agreement.

|_|  Failing to ensure full  compliance  with the license  agreement  by Roche's
     numerous affiliate sublicensees.

|_|  Failing to comply with the implied  duty of good faith and fair  dealing by
     failing to return to IGEN the rights to DNA probe  assays for  ORIGEN-based
     systems.

|_|  Failing to provide IGEN with  improvements  such as instruments and assays,
     as obligated by the agreement.

The  Court had  previously  granted  summary  judgment  in IGEN's  favor on four
additional breach of contract claims:

|_|  Taking unsubstantiated "rental surcharge" deductions against reported sales
     of royalty-bearing products.

|_|  Settling  a patent  infringement  suit with a third  party  without  IGEN's
consent.

|_| Improving certain products after the launch of the Elecsys 2010 system.

|_|  Failing to inform IGEN of patent filings and/or to provide copies of patent
     applications in a timely manner.

IGEN expects post-trial motions will be filed and that Roche will appeal various
decisions  in this  case.  The  jury's  decisions,  including  IGEN's  right  to
terminate  the license  agreement,  would be effective  once affirmed on appeal.
During an appeal process, which IGEN expects could take approximately 18 months,
IGEN will  continue to receive  royalties  on Roche's  sales of  royalty-bearing
products under the license.

The  jury  also  found in  IGEN's  favor  and  against  Roche on all of  Roche's
counterclaims,  except  for one in which IGEN was  ordered  to pay five  hundred
thousand dollars.

Wohlstadter  added, "I want to take this  opportunity to personally thank all of
IGEN's employees and shareholders who have stood by the Company  throughout this
lengthy process,  as well as the outstanding team at Wilmer,  Cutler & Pickering
that has helped  guide us through  this  complex  and  extended  litigation.  We



believe the decisions of the Court  throughout  this case and the jury's verdict
are well founded and supported by the facts and the law. We are highly confident
this  verdict  will be upheld on  appeal  should  Roche  continue  its  delaying
tactics."

IGEN develops and markets biological detection systems based on its proprietary
ORIGEN technology, which provides a unique combination of sensitivity,
reliability, speed, and flexibility. ORIGEN-based systems are used in a wide
variety of applications, including clinical diagnostics, pharmaceutical research
and development, life science research, and industrial testing for food safety
and quality control. These systems are marketed by IGEN and its licensees and/or
distributors--Roche Diagnostics, Organon Teknika, Eisai Co. Ltd., Sumitomo
Corp., and Sanko Junyaku Co. Ltd. IGEN and ORIGEN are registered trademarks of
IGEN International Inc. More information about the company can be found at
www.igen.com.

This  release  contains  forward-looking  statements,  within the meaning of the
Private  Securities  Litigation Reform Act of 1995, about litigation,  including
the timing for completion of and prospects for ultimate success on any appeal of
the  litigation,  the commercial  viability of the Company's  technology and the
improvements  awarded to the Company,  and its future growth  prospects.  Actual
results  might  differ  materially  from  these  statements  due  to  risks  and
uncertainties,  including  future  decisions made by the court,  and competitive
technologies and products. More complete descriptions of the risks applicable to
IGEN appear in the company's  documents  filed with the  Securities and Exchange
Commission and available on request from the company.  IGEN disclaims any intent
or obligation to update these forward-looking statements.


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