The Centers for Disease Control and Prevention (CDC) reported that measles cases in the United States have exceeded 5,000 in 2026, with infections confirmed across 45 states and Washington, D.C. This total includes 5,182 cases, marking an increase of 330 cases from the previous weekly update.
Public health data indicates that the surge is largely driven by falling vaccination rates, with approximately 96% of cases occurring in unvaccinated individuals or those with unknown vaccination status.