News Pressroom

January 23, 2004

MedImmune to Provide Financial Guidance for 2004 on March 1, 2004

As Previously Announced, MedImmune to Provide 2003 Financial Results on January 29, 2004

GAITHERSBURG, Md., Jan. 23 /PRNewswire-FirstCall/ -- MedImmune, Inc. (Nasdaq: MEDI) today announced that on March 1, 2004 it will hold a conference call with investors to provide financial guidance for 2004, as well as insight into its long-range plans for FluMist(TM) (Influenza Virus Vaccine Live, Intranasal). Details for the March 1, 2004 conference call will be distributed at a later date via press release and through the company's website at www.medimmune.com.

David Mott, MedImmune's chief executive officer stated, "We currently expect to complete our plans for FluMist with Wyeth, our co-promotion partner for the vaccine, over the next several weeks, after which we can finalize our 2004 objectives. On March 1, we expect to be in a position to share our financial guidance for 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.

DISCLOSURE NOTICE: 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-                             01/23/2004
    /CONTACT:  Investors & Media: Lori Weiman, +1-301-527-4321, Investors:
John Filler, +1-240-632-4086, or Media: Jamie Lacey, +1-240-632-4035, all of
MedImmune, Inc./
    /Web site:  http://www.medimmune.com/
    (MEDI)

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

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