Alexion to Present at the Jefferies & Co. 2nd Annual Healthcare Conference

CHESHIRE, Conn., June 18 /PRNewswire-FirstCall/ — Alexion Pharmaceuticals, Inc. today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at the Jefferies & Co. 2nd Annual Healthcare Conference in New York City at 4:15 p.m., ET on Wednesday, June 25, 2008.

An audio webcast of Dr. Bell’s remarks will be available live. You can access the webcast at: http://www.alexionpharm.com/. An archived version of the remarks will also be available through the Company’s web site for a limited time following the conference.

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Alexion Pharmaceuticals, Inc.

CONTACT: Irving Adler, Sr. Director, Corporate Communications, AlexionPharmaceuticals, Inc., +1-203-271-8210; or Mark Marmur (Media), of Makovsky +Company for Alexion Pharmaceuticals, Inc., +1-212-508-9670; or Rhonda Chiger(Investors), of Rx Communications for Alexion Pharmaceuticals, Inc.,+1-917-322-2569

Web site: http://www.alexionpharm.com/