Health officials warn of growing measles outbreak in Arizona and Utah

Published September 23, 2025 1:04pm ET



Parts of southwestern Utah and northwestern Arizona are seeing one of the largest measles outbreaks in the United States.

Health officials have confirmed 23 cases in children in Utah, in which all but one were unvaccinated, and 42 cases in neighboring Mohave County, Arizona. Officials believe the cases in Arizona are tied to the outbreak in Utah.

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