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U.S. measles outbreak grows to 1,024 cases

By CIDRAP / University of Minnesota  
   May 19, 2025

The U.S. measles picture grew by 23 cases, according to a Friday update from the CDC. A total of 1,024 confirmed measle cases have been reported from 31 jurisdictions, with 14 outbreaks (defined as 3 or more related cases). Ninety-two percent of confirmed cases are outbreak-associated. Of the cases, 96% have occurred in people who are either unvaccinated or have unknown vaccination status, and 128 (13%) of case-patients have been hospitalized, including 69 children under the age of 5. Three deaths have been confirmed to date, including two in unvaccinated school-aged children.

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