Utah measles outbreak at 559 cases, CDC reports 1,671 nationwide

Cases in the Utah measles outbreak have increased to 559, the state’s Department of Health and Human Services reported March 31. The agency said 362 cases have been diagnosed so far this year during the outbreak, which began in June 2025. The Centers for Disease Control and Prevention reported today that there are 1,671 measles cases nationwide across 33 jurisdictions. There have been 17 outbreaks reported this year, with 94% of confirmed cases being outbreak-associated. The vaccination status of 92% of cases is unvaccinated or unknown.