If I was vaccinated for swine flu in the 1970's, do I need to get a 2009 H1N1 (swine flu) shot?
The 1976 swine flu virus and the 2009 H1N1 virus are different enough that its unlikely a person vaccinated in 1976 will have full protection from the 2009 H1N1. People vaccinated in 1976 should still be given the 2009 H1N1 vaccine.
Last Reviewed: 09/16/2009
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