H1N1

Pathology.

a subtype of the type A influenza virus, with strains that give rise to seasonal epidemics, or sometimes pandemics, including a strain with swine, avian, and human genes responsible for swine flu.

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Origin of H1N1¹

First recorded in 1970–75; abbreviation of h(aemagglutinin type)1 and n(euraminidase type) 1

In contrast, the 2009 H1N1 influenza pandemic infected 60 million Americans in just about the same five-month period of time.

The U.S. Department of Health and Human Services recently that an unaccompanied minor from Central America has the H1N1 flu.

It has not yet been confirmed that the children have the H1N1 virus, only that they have flu-like symptoms.

More than 60 million Americans developed infection from the novel H1N1 strain, an almost unbelievable number.

In 2009 nearly all influenza cases were caused by the pandemic H1N1 virus, driving the previously dominant H3N2 underground.

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