Data Sources

Outpatient influenza-like illness surveillance through the ILINet provider network.

Source: CDC Influenza Division · Coverage: All 50 states + DC, national

Laboratory surveillance for respiratory viruses including RSV, influenza, and others.

Source: CDC National Respiratory and Enteric Virus Surveillance System · Coverage: National and regional

Emergency department visit data for respiratory illness syndromes.

Source: CDC National Syndromic Surveillance Program · Coverage: Most states (participation varies)

Wastewater (sewage) monitoring for viral genetic material from SARS-CoV-2, influenza, and RSV.

Source: CDC National Wastewater Surveillance System · Coverage: 800+ sampling sites across the U.S.

Kindergarten vaccination coverage rates including MMR, by state.

Source: CDC National Center for Immunization and Respiratory Diseases · Coverage: All 50 states + DC

County-level measles case counts and outbreak tracking compiled from state and local health department reports.

Source: JHU CSSEGISandData Measles Tracking Team · Coverage: National, state, and county-level

Processed CDC respiratory illness surveillance data from the PopHIVE open-source project.

Source: PopHIVE Project · Coverage: National and state-level