A Weekly Influenza Activity Report*

National Flu Activity Map

A weekly influenza surveillance report prepared by the influenza division weekly influenza activity estimates reported by state and territorial epidemiologists.*

*This map indicates geographic spread and does not measure the severity of the influenza activity.
 Source: US Centers for Disease Control and Prevention.
 Influenza-Like Illness (ILI) Activity Level Indicator Determined by Data Reported to ILINet

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