Asian lineage avian influenza virus (H7N9) is a subtype of influenza virus that can infect humans following exposure to live, infected poultry. There have been several outbreaks since the first reported case in China in 2013, and the mortality rate is as high as 39 percent. Although person-to-person transmission of the virus is unlikely, influenza viruses are constantly evolving into new strains. Therefore, there is a constant threat of emergence of more pathogenic and resistant viruses with the ability to trigger a worldwide pandemic outbreak.
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