US sees most active flu season since 2009 'swine' pandemic

Flu is sweeping the United States, killing at least 37 children and sending the most people nationwide in search of medical care since the 2009 "swine flu" pandemic, US officials said Friday. This year, the most common strain of influenza is H3N2, and nearly every state has been hit hard, said the US Centers for Disease Control and Prevention. "For the past three weeks, the entire country has been experiencing lots of flu, all at the same time," said Dan Jernigan, director of the Influenza Division at the National Center for Immunization and Respiratory Diseases, part of the CDC.

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