Evolution of H9N2 virus set stage for H7N9

Evolution of H9N2 virus set stage for H7N9

Changes in H9N2 flu virus in chickens could signal emergence of viruses with potential to trigger pandemic.

AN international research team has shown how changes in an influenza virus that has plagued poultry farms in China for decades helped create the novel avian H7N9 influenza A virus that has afflicted more than 375 people since 2013.

The research appears in the current onl

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