Dossier
measles-free status
Coverage of measles-free status in the Nexus archive.
- There are already more US measles cases this year than in all of 2025
The U.S. has reported 2,318 measles cases in 2026, surpassing the 2025 total of 2,289, making it the worst year since 1991. Major outbreaks in South Carolina, Utah, and Arizona have driven the surge, with declining vaccination rates below the 95% threshold needed to prevent outbreaks. International health officials will assess if the U.S. and Mexico have lost their measles-free status in November.