Overview

• Health officials report 30 cases in Washington County, Utah, and 48 in Mohave County, Arizona, as of Sept. 25, with the outbreaks linked across the state line.
• Mohave County says all 48 local cases are in unvaccinated people, most of them school-age children, and at least one child has been hospitalized.
• Arizona has recorded 52 measles cases statewide in 2025, the highest annual total since 1991, according to the Arizona Department of Health Services.
• Nationally, the CDC counts 1,514 cases and 40 outbreaks so far this year, including three deaths and 185 hospitalizations, and the agency is pressing families to vaccinate.
• Vaccination gaps are stark, with only about 79% of kindergartners protected in Washington County and just 7.7% vaccinated at one Mohave County school, though local clinics report rising MMR uptake.