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UtahArizona Border Measles Outbreak Grows to 123 Cases, Spreads Beyond Epicenter

Low childhood vaccination rates left the region vulnerable to school clusters that have shifted into community transmission.

Overview

  • Most infections remain linked to the tight-knit Colorado CityHildale community that spans the state line.
  • Cases have been identified in Hurricane and St. George following hospital and urgent-care exposures, and officials report community spread.
  • Transmission has reached Iron County, widening the affected area that includes popular tourist destinations near Zion National Park.
  • Utah health officials now count 58 cases statewide, including 44 in the Southwest Utah Health District, with seven hospitalizations.
  • Childhood MMR coverage in Iron (82.4%), Washington (79.2%), and Mohave (78.4%) counties is far below the ~95% threshold, as the CDC reports 1,618 U.S. cases across 42 states this year, the most in 33 years.