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November 15, 2004

MedImmune Appoints New Vice President, Medical Affairs

GAITHERSBURG, Md., Nov. 15 /PRNewswire-FirstCall/ -- MedImmune, Inc. (Nasdaq: MEDI) announced today that it has appointed Francois Lebel, M.D. as vice president, medical affairs, reporting to Edward M. Connor, M.D., executive vice president and chief medical officer, effective immediately.

"Continuing to expand our depth of scientific and medical expertise, I am pleased to welcome Francois to our team of biotechnology executives dedicated to the corporate mission of advancing science for better health," said Dr. Connor.

As vice president, medical affairs, Dr. Lebel oversees MedImmune's medical activities relating to our marketed products, including clinical trials and medical information. Dr. Lebel has more than 15 years of drug development experience, having played a key role in four new drug applications to the U.S. Food & Drug Administration. In addition, he has conducted several late-stage virology and oncology studies, including using patient registries to explore new indications. He gained extensive international experience from the launch of a number of products in more than 40 countries. Dr. Lebel has a strong record of accomplishments in a variety of increasingly responsible medical, regulatory and quality assurance positions held at Parke-Davis (Warner- Lambert), Galagen, Inc., and Burroughs Wellcome, Inc. In 2000, he joined PathoGenesis Corp., where he facilitated the company's integration with Chiron, becoming Chiron-Seattle general manager. Most recently, he served as divisional vice president and head, global medical affairs at Chiron headquarters in Emeryville, California. Dr. Lebel holds bachelor's and medical degrees from the University of Ottawa and trained in Microbiology and Infectious Diseases at McGill University and Harvard Medical School.

About MedImmune, Inc.

MedImmune strives to provide better medicines to patients, new medical options for physicians, rewarding careers to employees, and increased value to shareholders. Dedicated to advancing science and medicine to help people live better lives, the company is focused on the areas of infectious diseases, cancer and inflammatory diseases. With approximately 1,900 employees worldwide, MedImmune is headquartered in Maryland. For more information, visit the company's website at http://www.medimmune.com.

This announcement may contain, in addition to historical information, certain forward-looking statements that involve risks and uncertainties. Such statements reflect management's current views and are based on certain assumptions. Actual results could differ materially from those currently anticipated as a result of a number of factors, including risks and uncertainties discussed in MedImmune's filings with the U.S. Securities and Exchange Commission. The company is developing several products for potential future marketing. There can be no assurance that such development efforts will succeed, that such products will receive required regulatory clearance or that, even if such regulatory clearance were received, such products would ultimately achieve commercial success.

SOURCE  MedImmune, Inc.
    -0-                             11/15/2004
    /CONTACT:  Media: Jamie Lacey, +1-301-398-4035, or Investors: Peter Vozzo,
+1-301-398-4358, or John Filler, +1-301-398-4086, all of MedImmune, Inc./
    /Web site:  http://www.medimmune.com/
    (MEDI)

CO:  MedImmune, Inc.
ST:  Maryland
IN:  HEA MTC BIO
SU:  PER

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