The Centers for Disease Control and Prevention reported 5,182 measles cases in the United States as of November 5, the highest annual total in 35 years and the first time the yearly count has passed 5,000 since 1991. The latest update, released on Friday, added 330 cases in a single week, and the total is now more than double the 2,289 cases recorded in all of 2025. The disease, once declared eliminated in the United States, is spreading again in 45 states plus Washington, D.C., with 43 outbreaks reported so far this year.
Why it matters
The human cost is measured in hospital beds as well as case counts. Nationwide hospitalisations linked to measles this year stood at 562, about 11 percent of all confirmed cases, and the vast majority of infections, 96 percent, were among people who were unvaccinated or whose vaccination status was unknown. State health officials have reported at least eight measles related deaths this year, including among very young children, although the CDC official count, which uses mortality data from the National Center for Health Statistics, records four deaths, against three in all of 2025.
Pennsylvania is the hardest hit state in the outbreak. Its health department, which updated its data on Friday, reported 1,487 cases and 287 hospitalisations, and the state confirmed its sixth measles related death of the year on November 4. South Carolina recorded the next highest number of cases at 670, followed by Utah at 536. Wisconsin reported its first measles death in 36 years on November 6, when an infant died amid an outbreak of 431 cases across 13 counties, and New York announced its first death of the year.
What happens next
The outbreak is now a test of the country public health standing. The Pan American Health Organization, the regional branch of the World Health Organization, is due to review the United States measles elimination status from next week, and experts expect the country to lose the status it has held for a quarter of a century. The review follows the 2025 Texas outbreak that killed three people, and the epidemic now raging began in Texas in 2025 and still seems far from being contained.
What happens next will be measured in weeks, not days. The CDC has allocated 100 million dollars in federal funding to support state outbreak response, and health departments repeat the same practical advice because it works: children should receive the measles, mumps and rubella vaccine on schedule, and adults unsure of their status should check with a clinician. Measles is one of the most contagious diseases known to medicine, and it returns only where vaccination has faltered. The 5,000 mark is the number that proves it.
