In Arizona and Utah, an outbreak has ballooned since August. Mohave County, Arizona has logged 172 cases and the Southwest Utah Public Health Department has logged 82 cases. The border cities of Colorado City, Arizona, and Hildale, Utah, are the heaviest hit.

The Centers for Disease Control and Prevention (CDC) today said the United States has 1,912 confirmed measles cases so far in 2025, an increase of 84 cases since last week and a bad sign as holiday gatherings, travel, and indoor activities is set to pick up in the final weeks of the year.

A South Carolina measles outbreak reaches 111 cases in Spartanburg County, with 254 quarantined. Health officials urge vaccination as the best way to prevent spread.

Nationally, the measles case count is nearing 2,000 for a disease that has been considered eliminated in the U.S. Many of those cases are in South Carolina.

Spartanburg's 'accelerating' measles outbreak has surpassed 100 cases. The underlying causes go beyond simple exposure into culture and experiences

For the first time in decades, the US may lose a designation indicating that outbreaks are rare and rapidly contained.

The World Health Organization considers measles eliminated if a country goes a year without continuous local transmission. The United States achieved elimination in the year 2000. However, if new measles cases continue into January 2026, the U.S. will lose that status.

Canada has had more than a year of continuous measles transmission. The United States has until January to limit cases before losing status.