The United States is on pace for its worst measles year in more than three decades, with 3,887 confirmed cases across 47 states and jurisdictions as of early October — the highest tally since 1991, according to an analysis by Becker's Hospital Review. The milestone lands as international health officials prepare to decide whether the country keeps the formal measles elimination status it earned in 2000.

The Centers for Disease Control and Prevention has confirmed two measles deaths nationally this year, though Pennsylvania's own health department has separately reported five deaths tied to its state outbreak — a discrepancy that reflects how death counts tied to measles complications, such as pneumonia and encephalitis, are sometimes attributed and tallied differently at the state and federal level.

Outbreaks still active in multiple states

The outbreak picture remains uneven state to state. Wisconsin's southwest region is still seeing local spread, with health officials there warning the cluster continues to grow. Ohio has logged 206 cases in its latest weekly count, while Virginia's total has held roughly flat since mid-September. Texas, by contrast, has seen its case count ease to 192 for the year after an earlier surge.

ABOUT 92% OF CASES ARE AMONG THE UNVACCINATED OR PEOPLE WHOSE STATUS IS UNKNOWN

That figure, drawn from earlier CDC data this year, has remained a consistent thread through 2026's outbreaks: the vast majority of infections are concentrated among people who have not received the MMR vaccine or whose vaccination history isn't documented, rather than spreading broadly through vaccinated communities.

The stakes now extend beyond this year's case count. The Pan American Health Organization, the World Health Organization's regional body for the Americas, was scheduled to review the United States' measles elimination status at its annual meeting this month, after an earlier review was postponed in the spring. Elimination status — meaning a disease is not considered to have continuous, endemic transmission within a country's borders — is reassessed when sustained chains of local transmission run longer than 12 months, a threshold several of this year's state outbreaks have already approached.

Losing that designation would carry largely symbolic and public-health-messaging weight rather than immediate practical consequences, but health officials have said it would mark a significant reversal for a status the country has held since declaring the disease eliminated 26 years ago. State and federal health departments say vaccination remains the most effective tool to halt the spread, as the holiday travel season approaches and case counts typically climb.