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Texas Measles Outbreak Reaches 722 Cases, First Reported in South Texas

The largest U.S. measles outbreak in 25 years continues to decline, with fewer than 10 active cases and two child fatalities confirmed.

A resident of Kyle, in the Hill Country, has tested positive for measles, according to the Hays County Health Department.
Measles, mumps and rubella vaccines offered by Harris County Public Health are photographed on Saturday, April 5, 2025 in Houston.

Overview

  • The Texas measles outbreak, centered in Gaines County, has grown to 722 confirmed cases since January 2025, with 406 cases reported in Gaines County alone.
  • The first case in South Texas has been confirmed in Atascosa County, near San Antonio, marking a geographic expansion of the outbreak.
  • The outbreak has resulted in two deaths—both unvaccinated school-aged children—marking the first U.S. measles fatalities since 2015.
  • More than 95% of cases involve unvaccinated individuals, highlighting declining vaccination rates below herd immunity thresholds in Texas.
  • Health officials report fewer than 10 active infections statewide, with ongoing transmission still designated in seven counties, including Gaines, Lubbock, and Terry.