CDC: 2009 H1N1 Influenza Vaccine with Long-Dated Expiration Questions and Answers

[tetano]

Unlike seasonal influenza vaccine which typically expires on June 30th, the 2009 H1N1 monovalent influenza vaccine expiration dates range from February 2010 to early 2011. Sanofi Pasteur multi-dose vials (MDV), specifically, have expiration dates in 2011. Additional 2009 H1N1 influenza activity (i.e. "third wave") is possible through spring and summer of 2010, or in early fall 2010 when the 2010-11 trivalent influenza vaccine is not yet available. Although the 2010-11 seasonal trivalent influenza vaccine will contain a 2009 H1N1-like influenza A strain, the timing of its production and availability is not yet known.

The purpose of this document is to address questions raised by the long-expiry vaccine.

http://www.cdc.gov/h1n1flu/vaccination/qa_longdated_vaccine.htm