US Respiratory Illness Activity (December 2025)

States experiencing "High" or "Very High" levels of respiratory illness activity, including influenza, based on patient diagnosis and treatment data.

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Very High Activity Zone: A significant cluster of 20 states across the South, Midwest, and Northeast (including NY, NC, and OH) are experiencing peak respiratory illness pressure. High Activity Zone: 9 states—including major population centers like California, Texas, and Florida—are reporting elevated infection rates.

Source: Centers for Disease Control and Prevention (CDC)Get the dataCreated with Datawrapper