Notice to Readers: Newly Licensed Smallpox Vaccine to Replace Old Smallpox Vaccine: February 29, 2008
Description:CDC has begun distribution of a new-generation smallpox vaccine, ACAM2000 (Acambis, Inc., Cambridge, Massachusetts), to civilian laboratory personnel, the military, and state public health preparedness programs. ACAM2000 is a live, vaccinia virus smallpox vaccine that was licensed for use in the United States by the Food and Drug Administration in August 2007 (1).* ACAM2000 will be replacing Dryvax smallpox vaccine (Wyeth Pharmaceuticals, Inc., Marietta, Pennsylvania) because of withdrawal of the Dryvax license. ACAM2000 is a live vaccinia virus derived from plaque purification cloning from Dryvax. The safety data available from the ACAM2000 clinical trials indicate a similar safety profile to Dryvax.
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