US Measles Cases in 2026 More Than Double 2025 Total, CDC Reports

The Centers for Disease Control and Prevention (CDC) reported 4,852 confirmed measles cases in the U.S. as of October 29, 2026, representing a 5.8% increase week-over-week and more than double the total cases reported in all of 2025. The majority of cases (96%) occurred in unvaccinated individuals or those with unknown vaccination status.