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Where did most flu activity occur in the United States this season?

April 26, 2017activity asian flu avian flu flu Influenza influenza-likeillness occur season spanish flu united states

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Where did most flu activity occur in the United States this season?

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Flu viruses were identified in all states. In February, when the flu season peaked, widespread* flu activity was reported in all 50 states across all regions of the country. *Widespread flu activity is defined as increased flu-like activity or flu outbreaks in at least half of the regions in a state with recent laboratory evidence of flu in the state.