Measles Outbreak

The Centers for Disease Control and Prevention reported 1,362 confirmed measles cases nationwide in 2026, with 94% linked to ongoing outbreaks. South Carolina's outbreak, which began in October 2025, has decelerated to approximately 10 cases per week after peaking at 200 weekly cases in mid-January, bringing the state total to 996 cases as of March 13. Utah's outbreak, originating in June 2025, has accelerated to 405 cases as of March 10, representing a 47-case increase in one week. Both states currently host the largest active measles outbreaks in the United States.

The measles outbreak in Colorado tied to two Broomfield schools has grown to 10 cases, including two new confirmed infections and one suspected as of March 12. Public health teams are tracing exposures and urging quarantines. This cluster underscores vulnerabilities in school vaccination coverage amid rising national measles alerts. Officials plan expanded testing and contact tracing to halt further spread.

A major measles outbreak in South Carolina is showing signs of slowing, with cases nearing 1,000 total and new infections dropping to about 10 per week from a peak of 200 weekly in mid-January. State health officials report a consistent downward trend over several weeks amid vaccination efforts. The decline matters as it reduces strain on public health resources in a state hit hardest by the outbreak. Monitoring continues to prevent resurgence through summer.