Press Releases
September 4, 2007

Alexion to Present at Bear Stearns Healthcare Conference

CHESHIRE, Conn., Sept 04, 2007 /PRNewswire-FirstCall via COMTEX News Network/ --

Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at the Bear Stearns 20th Annual Healthcare Conference in New York City at 8:00 a.m. ET on Tuesday, September 11, 2007.

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 An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.

SOURCE Alexion Pharmaceuticals, Inc.

http://www.alexionpharm.com

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