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A 43-year-old member asked:

Heard h1n1 is back in the us. why?

1 doctor answer2 doctors weighed in
Dr. Michael Ein
Infectious Disease 48 years experience
Never left: H1n1 influenza has been present in the us since the pandemic several years ago. This year it is only accounting for a few percent of the cases of influenza tested by the cdc. H3n2 and influenza b have accounted for most of the cases so far this year.

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Last updated Oct 23, 2017
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