Press Releases
February 27, 2006

ALEXION To Present At Cowen & Co. 26th Annual Health Care Conference

ALEXION To Present At Cowen & Co. 26th Annual Health Care Conference

Cheshire, CT, February 27, 2006 -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at the Cowen & Co. 26th Annual Health Care Conference in Boston at 3:10 p.m. and 4:00 p.m., eastern time on Monday, March 6, 2006.

An audio webcast of Dr. Bell's first presentation 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 An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.