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How long does it take for the symptoms of swine flu to show up?


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Flu Symptoms The incubation period is 24-48 hours. In general, the incubation period for the influenza virus (all types of flu) is 2 days, but can range from 1 to 5 days. In most US cases, the incubation period for swine flu seems to range from 2 to 7 days.ChaCha

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