PAHO Reviews US Measles Elimination Status

A Pan American Health Organization commission is reviewing whether measles has circulated continuously in the United States for at least 12 months, a finding that could end the country’s elimination status. The commission is meeting November 10-13, and its decision is pending.

The United States recorded 5,182 confirmed measles cases so far in 2026, according to figures from the Centers for Disease Control and Prevention cited in reports. That compares with 2,289 cases in all of 2025. The 2026 figure is year-to-date, not a full-year total.

Measles elimination does not mean a country has no cases. It means the virus is not spreading continuously within its borders for a year; imported infections may occur if they do not lead to sustained transmission. The United States received the designation in 2000. Losing it would mean measles is considered endemic again, though reports say there is no formal penalty attached to the designation.

The commission’s review focuses on whether transmission has continued within the country for the required period. Reports describe the assessment as covering outbreak size and spread, vaccination rates and whether infections across states represent an...