News Pressroom

April 7, 2004

MedImmune to Announce First Quarter 2004 Financial Results on April 21, 2004

GAITHERSBURG, Md., April 7 /PRNewswire-FirstCall/ -- MedImmune, Inc.'s (Nasdaq: MEDI) first quarter financial results for 2004 will be announced on Wednesday, April 21, 2004 before the opening of the U.S. financial markets. The company will also host a conference call and live audio webcast at 8:00 a.m. eastern time following the announcement. During the conference call, MedImmune's management will discuss the financial results for the quarter and other business.

The press release and the live webcast will be accessible through the Investor Relations section on MedImmune's website at www.medimmune.com. Following the live webcast, an archived version of the call will be available on MedImmune's website until April 28, 2004.

About MedImmune

MedImmune is a leading biotechnology company focused on researching, developing and commercializing products to prevent or treat infectious disease, autoimmune disease and cancer. MedImmune actively markets four products, Synagis(R) (palivizumab), Ethyol(R) (amifostine), FluMist(TM) (Influenza Virus Vaccine Live, Intranasal), and CytoGam(R) (cytomegalovirus immune globulin intravenous (human)), and has additional products in clinical testing. MedImmune employs approximately 1,800 people, is headquartered in Gaithersburg, Maryland, and has additional operations in Frederick, Maryland, as well as Pennsylvania, California, the United Kingdom and the Netherlands. For more information on MedImmune and its products, visit the company's website at 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 the company'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-                             04/07/2004
    /CONTACT:  Media:  Jamie Lacey, +1-301-398-4035 or Investors:  John
Filler, +1-301-398-4086, both of MedImmune, Inc./
    /Web site:  http://www.medimmune.com/
    (MEDI)

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

MB-JA 
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