Swine flu spreads week or more after symptoms - Swine flu- msnbc.com
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Swine flu spreads week or more after symptoms - Swine flu- msnbc.com
New studies show that many people with swine flu may be able to spread the virus for a week or more after symptoms first appear. That's longer than some experts had thought.
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Most Recently Shared on September 14, 2009 at 9:20 pm By:
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