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Are certain people immune to H1N1 virus?

October 15, 2009 12:00:00 AM PDT
People repeatedly exposed to common flu viruses or the seasonal flu vaccine may have added protection against the swine flu.Scientists at the University of California, Davis say the extra protection does not come from antibodies.

Instead, they say they've discovered activity within the body's cells that works to clear the virus from the body.

They say this explains why many people over the age of 60 have added resistance to the H1N1 virus.

The findings will be reported in next month's issue of the Journal of Emerging Infectious Diseases, which is published by the Centers for Disease Control and Prevention.

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