CALENDAR OF EVENTS

Investor Conferences and Events

Jun 23, 2009	The Fourth Annual Piper Jaffray Europe Conference	London, England

Sep 9-11, 2009	Thomas Weisel Partners 2009 Healthcare Conference	Boston, MA

Sep 10, 2009	Robert W. Baird 2009 Health Care Conference	New York, NY

Jun 21-24, 2009

2009 AAPS National Biotechnology Conference

Justification of a Human Raxibacumab Dose Under the Animal Rule - Poster Presentation - June 23

Raxibacumab Population Pharmacokinetics in Humans - Poster Presentation - June 23

Seattle, Washington