As of July 8, Centers for Disease Control and Prevention (CDC) reported 1,288 confirmed measles cases in 2025 in 39 jurisdictions, including the first cases reported this year in Wyoming. Among confirmed cases of all ages, 13% were hospitalized. Among those younger than five years old, 21% were hospitalized.
The CDC only requires reporting of laboratory-confirmed measles cases. Cases without laboratory testing for confirmation are not included in these numbers. Actual numbers of cases are, therefore, higher than confirmed case counts. A map of 2025 measles cases in the contiguous United States, as of July 9, from the Johns Hopkins International Vaccine Access Center is available. The U.S. Measles Tracker website includes state and county-level data. The best way to prevent measles remains vaccination.