Overview
- Advisors to the Pan American Health Organization are meeting this week to determine whether chains of measles transmission in the United States have gone uninterrupted long enough to revoke the country’s elimination status.
- The CDC has recorded roughly 5,100 confirmed measles cases in 2026 across about 47 states, with Pennsylvania the largest hotspot at more than 1,500 cases and hundreds hospitalized.
- State health departments have reported eight measles-associated deaths this year — six in Pennsylvania, one in New York and one in Wisconsin — and most cases have been in people who were unvaccinated or whose status is unknown.
- Publicly available genomic data show only slight variation among virus samples from different outbreaks, a technical finding that is central to PAHO’s decision because it suggests continuous domestic spread rather than isolated importations.
- The federal government says it has provided about $100 million and sent experts to help states, while public-health officials urge MMR vaccination to restore the roughly 95% coverage needed to stop sustained measles spread.