'Swine' flu pandemic of 2009 traced to pigs in Mexico

Using state-of-the-art genetic analyses, researchers trace 2009 influenza A/H1N1 strain to pigs in a very small region of central Mexico.

The 2009 swine H1N1 flu pandemic — responsible for more than 17,000 deaths worldwide — originated in pigs from a very small region in central Mexico, according to a research team headed by investigators at the Icahn School of Medicine at The Mount Sinai Health System.

The scientists said their findings, published in the journal eLife, represent the first time that the origin of an influenza pandemic virus has been determined in such detail.

Researchers used state-of

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