Could the US lose its measles elimination status due to Arizona and Utah outbreaks?

Yes, if sustained transmission continues for a year, the US could lose its measles elimination status and measles would become endemic.

What is causing the measles outbreaks in Arizona and Utah?

Low vaccination rates in specific communities are identified as the primary reason for the rapid spread of measles.

What is the vaccination rate needed to prevent measles spread?

A vaccination rate of at least 95% is needed to prevent the widespread transmission of measles.

Home / Health / Arizona, Utah Measles Outbreak Threatens US Elimination Status

Arizona, Utah Measles Outbreak Threatens US Elimination Status

20 Nov, 2025

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Summary

Arizona and Utah face ongoing measles outbreaks, risking US elimination status.
Sustained transmission for a year would mean measles becomes endemic again.
Low vaccination rates in affected communities fuel rapid spread.

Arizona, Utah Measles Outbreak Threatens US Elimination Status

Measles outbreaks in Arizona and Utah are showing no signs of slowing, placing the United States in jeopardy of losing its elimination status for the vaccine-preventable disease. Health officials are particularly concerned that the upcoming holiday travel and gatherings could significantly accelerate transmission.

Experts warn that if sustained transmission continues through January 2026, the US would no longer be considered measles-eliminated and the disease would become endemic. This concerning trend is largely attributed to pockets of communities with low vaccination rates, making them highly susceptible to rapid spread.

Areas like Washington County, Utah, and Mohave County, Arizona, have reported significant case numbers, with vaccination rates for kindergartners in Mohave County at just 78%. The national rate for recommended MMR vaccine doses is also below the crucial 95% threshold, indicating a broader vulnerability.