h1n1 influenza a virus(swine flu) and h1n1 influenza a(swine flu)

about h1n1 influenza a(swine flu) , h5n1 influenza a ，know more about influenza a and History of H1N1 Influenza A virus.

H1n1 incubation period after exposure

H1n1 incubation period after exposure.People infected with influenza pandemic virus, infection H1N1 before 1 day for seven days after onset to.Incubation period 1-7 days or so commonly.

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