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What happened to bird flu? How a major threat to human health faded from view

Submitted by lsekela on February 13, 2019 - 09:25 AM

It’s not just H5N1 that has dissipated. The virus’s nearly-as-scary cousin, H7N9, emerged in China in 2013 and sickened more than 1,500 people in China over five years, killing roughly 40 percent of them.

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Helen Branswell