(CIDRAP News) A Department of Health and Human Services official said today that loss of potency is affecting less than 20% of H5N1 avian influenza vaccine doses in the national stockpile, not a majority of doses as reported here yesterday.
Bill Hall, an HHS spokesman in Washington, DC, said the agency has acquired a total of about 7.5 million doses of H5N1 vaccine to date, and about 200,000 of those have been used for research.