News Pressroom

October 17, 2003

Wal-Mart Defers Establishing a National Flu Vaccination Program

GAITHERSBURG, Md., Oct. 17 /PRNewswire-FirstCall/ -- MedImmune, Inc. (Nasdaq: MEDI) announced today that Wal-Mart Stores, Inc. (NYSE: WMT) has decided not to establish a large-scale, national flu vaccination program this season and, therefore, will not be offering FluMist(TM) (Influenza Virus Vaccine Live, Intranasal) in its pharmacies this year. Previously, Wal-Mart had intended to offer FluMist to its customers this flu season in select pharmacies after the U.S. Food and Drug Administration approved the vaccine in June.

Armando Anido, R.Ph., MedImmune's senior vice president of sales and marketing, stated, "While we are disappointed with the loss of Wal-Mart from our retail channel for this season, we appreciate the commitment, excitement and effort they put forth in trying to bring FluMist to their customers this year. For a company that has never offered a national flu vaccination program before, the compression of time this year became a critical roadblock. That being said, we look forward to continuing to work with their team to create an outstanding FluMist program at Wal-Mart stores in the future.

"FluMist is currently available at over 14,000 outlets throughout the U.S., including other retail pharmacies and physicians offices, as well as hospitals and employers," continued Anido. "We're pleased with the strong initial response in consumer awareness for the vaccine following the launch of our advertising campaign three weeks ago, and believe we are well along our way in beginning to educate people about the impact of the flu. With the season just underway, we are tackling obstacles and capitalizing on opportunities on a daily basis. We continue to strive toward achieving our objectives and are reconfirming our previously stated financial guidance of $120 million to $140 million in FluMist-related revenues in this launch year."

The flu is a recurrent epidemic infectious disease that significantly affects and disrupts the lives of healthy children and adults. Each year in the U.S., an estimated 17 million to 50 million people, many of whom are otherwise healthy individuals, are infected with the influenza virus. Influenza results in approximately $3 billion to $15 billion annually in direct and indirect costs, including approximately 70 million missed workdays and approximately 38 million missed school days. The most effective way to help prevent influenza is vaccination.

About FluMist

FluMist is indicated for active immunization for the prevention of disease caused by influenza A and B viruses in healthy children and adolescents, 5 to 17 years of age, and healthy adults, 18 to 49 years of age.

In placebo-controlled clinical trials, the most common solicited adverse events in healthy children (n=214) included runny nose/nasal congestion, cough, irritability, headache, decreased activity, sore throat, fever (oral temperature >100 degrees F), muscle aches, chills, and vomiting. The most common adverse events in healthy adults (n=2,548) included runny nose, headache, sore throat, tiredness/weakness, muscle aches, cough, and chills.

There are risks associated with all vaccines, including FluMist. FluMist does not protect 100% of individuals vaccinated, or protect against viral strains not represented in the vaccine. FluMist is not indicated for immunization of individuals less than 5 years of age, or 50 years of age and older. FluMist is contraindicated in persons with hypersensitivity to any component of the vaccine, including eggs; in children and adolescents receiving aspirin therapy or aspirin-containing therapy; in individuals with a history of Guillain-Barre syndrome; and in individuals with known or suspected immune deficiency. The safety and efficacy of FluMist have not been established in pregnant women or for patients with chronic underlying medical conditions, including asthma or reactive airways disease; the vaccine should not be administered to these patients. See Prescribing Information for indications and usage, dosage and administration, and safety information.

For more information about FluMist, call 1-877-FluMist or visit www.flumist.com.

About MedImmune, Inc.

MedImmune, Inc., 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), FluMist(TM) (Influenza Virus Vaccine Live, Intranasal), Ethyol(R) (amifostine), and CytoGam(R) (cytomegalovirus immune globulin intravenous (human)), and has additional products in clinical testing. MedImmune employs approximately 1,700 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 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. The information contained in this document is as of the date hereof and will not be updated as a result of new information or future events.

SOURCE  MedImmune, Inc.
    -0-                             10/17/2003
    /CONTACT: Investors: Will Roberts, +1-301-527-4358 or John Filler,
+1-240-632-4086; or Media: Jamie Lacey, +1-240-632-4035, all of MedImmune,
Inc./
    /Web site:  http://www.medimmune.com
                http://www.flumist.com/
    (MEDI WMT)

CO:  MedImmune, Inc.; Wal-Mart Stores, Inc.
ST:  Maryland
IN:  MLM HEA REA
SU:

MB-JV 
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9053 10/17/2003 08:01 EDT http://www.prnewswire.com