Summary Sanofi Pasteur has notified CDC and FDA that some lots of monovalent 2009 (H1N1) influenza vaccine in prefilled syringes will have a shorter expiration period indicated on the label. The lots of Sanofi Pasteur monovalent 2009 H1N1 influenza vaccine in prefilled syringes should be used by February 15, 2010, as indicated in the table below regardless of the expiration imprinted on the package. This is to ensure that the vaccine is used while it remains within its potency specification. There are no safety concerns with these lots of 2009 H1N1 vaccine. People who received vaccine from the lots listed below with shortened shelf life do not need to take any action.
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