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Study: H7N9 could spread among humans with a few genetic tweaks
Jamie Mcdonald/Getty Images

Three genetic changes would render avian influenza strain H7N9 easily transmissible between humans, scientists report in PLOS Pathogens. The researchers zeroed in on H7 hemagglutanin, finding three amino acid changes would enable the protein to latch onto human tissue, and previous research has found similar changes in avian influenza viruses of the past enabled human-to-human transmission.

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