As of May 7, 2026, the CDC has reported 1,842 cases of measles in the United States, stemming from 25 separate outbreaks, with 93% of these cases occurring in individuals who are unvaccinated. The country is on track to exceed the total of 2,288 cases recorded in 2025 before the end of summer. The Pan American Health Organization is set to evaluate the US measles elimination status in November, and experts indicate that losing this status is becoming more likely. National MMR vaccination rates for kindergarteners have dropped to 92.5%, falling short of the 95% herd immunity threshold required to prevent the virus's spread.
