Alexion Pharmaceuticals, Inc.
Leonard Bell, M.D.
Chief Executive Officer
(203) 272-2596

Rx Communications
Rhonda Chiger (Investors)
(917) 322-2569

Alexion To Present At The Merrill Lynch Global Pharmaceutical, Biotechnology and Medical Device Conference

Cheshire, CT, January 30, 2007 -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at the
Merrill Lynch Global Pharmaceutical, Biotechnology and Medical Device Conference in New York at 4:00 p.m. ET on Tuesday, February 6, 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 An archived version of the remarks will also be available through the Company’s web site for a limited time following the conference.