Thursday, June 9, 2011

Swine flu spread wider than suspected

The swine flu outbreak during the winter of 2009-2010 was much more wide spread than previously realized, a study says.

Blood samples taken from Scottish adults in March last year at the end of the H1N1 flu season showed that almost half were carrying antibodies to the virus. Antibodies are either produced by the body or injected through vaccines when the body is exposed to pathogens.

Most of the 44 percent who tested positive had contracted swine flu, although some had acquired

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