NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO CANADA, JAPAN OR AUSTRALIA

Recommended cash tender offer (the “Offer”) to be made by AstraZeneca PLC (“AstraZeneca”) for MedImmune, Inc. (“MedImmune”).

Please read this notice carefully – it applies to all persons who view this part of the website and, depending upon who you are and where you live, it may affect your rights. This part of the site contains information on the Offer. Please note that as the Offer progresses, the disclaimer set out below may be altered or updated. You should read it in full each time you visit this part of the website.

For regulatory reasons, we have to ensure you are aware of the appropriate regulations for the country which you are in. To allow you to view details relating to the Offer, you have to read the following then press "I agree". If you are unable to agree you should press "I disagree" and you will not be able to view any such details.

The information in relation to the Offer posted on this website is made available in good faith and for information purposes only and does not comprise an offer or invitation in relation to the Offer or investment advice. Such information speaks only at the date of the relevant document, and AstraZeneca has, and accepts, no responsibility or duty to update any such information or document and reserves the right to add to, remove or amend any information reproduced on this website at any time.

Access to information about the Offer
United States

The Offer described on this website is for informational purposes only and does not constitute an offer to purchase or a solicitation of an offer to sell MedImmune common stock. The Offer is being made pursuant to a tender offer statement on Schedule TO (including the offer to purchase, letter of transmittal and other related Offer materials, which were mailed to MedImmune’s stockholders) filed by a subsidiary of AstraZeneca with the Securities and Exchange Commission (“SEC”) on May 3, 2007. In addition, on May 3, 2007, MedImmune filed with the SEC a solicitation/recommendation statement on Schedule 14D-9 with respect to the Offer, which was mailed to MedImmune’s stockholders. The tender offer statement (and related materials), as it may be amended from time to time, and the solicitation/recommendation statement, as it may be amended from time to time, contain important information, including the various terms of, and conditions to, the Offer, that should be read carefully before any decision is made with respect to the Offer. These materials may be obtained free of charge by contacting the information agent for the Offer, Georgeson, Inc., at (877) 653-2948 (toll-free). In addition, all of these materials (and all other materials filed by MedImmune and AstraZeneca with the SEC) are available for free at the website maintained by the SEC at www.sec.gov.

Other jurisdictions

Under the local law requirements in certain jurisdictions, restrictions do or may apply in relation to the making of the Offer and/or to the circulation, accessing or availability of information relating to the Offer in or into those jurisdictions. Any person who wishes to view this website area must first satisfy themselves that they are not subject to any local requirements which prohibit or restrict them from doing so and should inform themselves of, and observe, any applicable legal or regulatory requirements of their jurisdictions. In particular, it is unlawful for residents of Canada, Japan and Australia to receive the information contained in the following pages of this website area.

If you are not permitted to view the information on this website area, or viewing the information would result in a breach of the above, or you are in doubt as to whether you are permitted to view the information, please exit this web page by clicking on the “I disagree” box below.

THE INFORMATION RELATING TO THE OFFER MAY NOT BE DOWNLOADED BY ANY PERSON LOCATED IN CANADA, JAPAN OR AUSTRALIA EITHER IN WHOLE OR IN PART. MOREOVER, THE INFORMATION RELATING TO THE OFFER MAY NOT BE DOWNLOADED BY ANY PERSON EITHER IN WHOLE OR IN PART WHERE TO DO SO WOULD OR MAY CONSTITUTE A BREACH OF ANY APPLICABLE LOCAL LAW OR REGULATIONS.