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.

Canada’s pigs were infected with the virus would cause mutation

Average person flu annually by the pig is coming. The normal situation of our influenza spread by pig pig, first, and then to popular among people, then is the interpersonal communication.
You mentioned variations may also exist. But the possibility that no one knows about this, we understand the virus strain is insufficient still.

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