Variant Influenza A:
Influenza A Variant Viruses H3N2v and H1N2v
and Novel Influenza Virus H7N9
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- Novel and Variant Influenza A Viruses
New (novel) and highly pathogenic influenza A viruses have the potential to cause a pandemic if the virus were to change to become easily and sustainably spread from person-to-person. Variant influenza A virus does not usually infect people but occur in pigs, and are very different from human seasonal viruses.