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The measles outbreak along the Arizona-Utah border is over, public health officials say

closeup of a blue sign with white lettering
Sky Schaudt
/
KJZZ
A measles sign at a Phoenix hospital on May 11, 2026.

The measles outbreak connected to communities along the Arizona-Utah border has come to an end, according to public health officials.

The vast majority of measles cases in Arizona — 285 — have been in Mohave County. Public health officials there have been managing that outbreak since August of last year, along with the Arizona Department of Health Services.

The last confirmed case was at the end of April and more than 42 days have passed without reports of a new case. That meets the public health standard for declaring a measles outbreak over.

Last month, the state health department said recent wastewater sampling from the Colorado City-area indicated a notable drop in the presence of the virus.

Ninety-six percent of all of Arizona’s measles cases have been among unvaccinated people.

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KJZZ senior field correspondent Kathy Ritchie has 20 years of experience reporting and writing stories for national and local media outlets — nearly a decade of it has been spent in public media.
Katherine Davis-Young is a senior field correspondent reporting on a variety of issues, including public health and climate change.