Deadly 'H7N9' Avian Flu Spreads in China

A particularly deadly strain of avian flu, currently found in China, has infected more people there this flu season than it has in any season since the virus was identified, a new report finds.From October 2016 to February 2017, 460 people were reported infected with the H7N9 virus, according to the report, which was published today (March 3) by the U.S. Centers for Disease Control and Prevention (CDC).