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Flu Fact Sheet |
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Flu Fact Sheet - February 27, 2005 -- Influenza, or flu, is an acute respiratory infection caused by a variety of influenza viruses. The most familiar aspect of flu is the way it can "knock you off your feet" as it sweeps through entire... |
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- Influenza, more commonly known as the flu, is a viral illness that affects the respiratory tract. |
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