Why Swine Flu Differs From Seasonal Flu
July 2, 2009 - 12:56pm
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On June 11, the World Health Organization declared the first flu pandemic since 1968, triggered by the rapid spread of the H1N1 swine flu virus across North America, Australia, South America, Europe and regions beyond. Two weeks ago, U.S. health officials said they were considering a swine flu immunization campaign that could involve an unprecedented 600 million doses of vaccine. That would dwarf the 115 million vaccine doses given annually for seasonal flu.
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