Financing Reflects Significant Clinical Progress and Positive Data in Lead Programs

RESEARCH TRIANGLE PARK, NC, February 14, 2011 – Chimerix, Inc., a pharmaceutical company developing orally- available broad spectrum antiviral therapeutics, today announced the completion of a $45 million Series F financing. New Leaf Venture Partners led the round, with participation by new investors Pappas Ventures and Morningside Group, as well as existing investors Canaan Partners, Sanderling Ventures, Alta Partners, Asset Management Company and Frazier Healthcare Ventures.