Overview
- Health officials disclosed in a recorded call that the Texas outbreak and cases in Utah and Arizona are part of a single transmission chain.
- The chain began in January within a conservative Mennonite community on the western edge of Texas and spread to Oklahoma and New Mexico before being connected to other states.
- As of Nov. 13, the CDC has confirmed 1,723 U.S. measles cases in 2025, with 87% tied to a record 45 outbreaks this year.
- Roughly 92% of reported cases are among people who are unvaccinated or whose vaccination status is unknown, underscoring gaps in MMR coverage.
- The CDC recently presented outbreak data to PAHO as regional scrutiny grows, with Canada having lost its elimination status, while local U.S. clusters show mixed progress including near-containment in two South Carolina schools and four new cases in Rockland County, N.Y.