Overview
- The cluster centered in Colorado City, Arizona, and Hildale, Utah has reached at least 123 infections, making it the nation’s second-largest measles outbreak this year.
- Utah health officials confirmed a new Southwest Utah case, bringing the state total to 58 with seven hospitalizations, and issued exposure alerts for St. George Regional Hospital, River Road Instacare and the Hurricane Emergency Department on specific October dates.
- Local officials report spread into Hurricane, St. George and Iron County, with many early clusters tied to schools and additional exposures in hospital and urgent care settings.
- Arizona’s dashboard lists 80 cases in Mohave County and four in Navajo County, with three hospitalizations and no deaths reported.
- Vaccination rates remain below herd-immunity levels—Iron County 82.4%, Washington County 79.2%, Mohave County 78.4%—as the CDC counts 1,618 U.S. measles cases across 42 states this year, the most in 33 years.