U.S. Influenza-Like Illness (ILI) Activity Map by State #1358256 (License: Personal Use)

The map displays real-time or weekly influenza-like illness (ILI) activity across all 50 states, District of Columbia, and U.S. territories, using a standardized color scale: red for high activity, orange for moderate, yellow for low, green for minimal, and white for insufficient data. Insets for Alaska and Hawaii ensure geographic completeness, while labeled regions like New York City and the District of Columbia highlight key urban surveillance zones. Data is typically sourced from CDC’s ILINet network of outpatient providers and laboratories.

Used on public health dashboards (e.g., CDC FluView), news sites during flu season, and healthcare portals to inform clinicians, policymakers, and the public about regional flu burden and guide prevention efforts.