US health officials: Seasonal vaccine no help against swine flu

By
April 26, 2009 23:32




US health officials say they are "very pessimistic" that the seasonal flu vaccine protects against the unique swine flu infecting people in the United States, Mexico and Canada so far. A US Centers for Disease Control and Prevention official said Sunday afternoon that tests of the seasonal vaccine and the new virus show no cross-reaction, suggesting that people who got the vaccine have no added protection against the new bug. It's possible that people who have been exposed to flu viruses every year - especially older people, with a greater exposure history - may have some natural immunity, the CDC official said in a call with reporters.


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