West Texas measles outbreak produces first US measles death in a decade
Beginning in late January 2025, a measles outbreak centered on Gaines County in West Texas - an area with a large under-vaccinated Mennonite community where kindergarten MMR coverage was about 82%, below the roughly 95% needed for herd immunity - spread to neighboring counties and states. In late February 2025 an unvaccinated 6-year-old child died, described in reporting as the first US measles death in a decade; a second unvaccinated child, age 8, died in early April.
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Beginning in late January 2025, a measles outbreak centered on Gaines County in West Texas - an area with a large under-vaccinated Mennonite community where kindergarten MMR coverage was about 82%, below the roughly 95% needed for herd immunity - spread to neighboring counties and states. In late February 2025 an unvaccinated 6-year-old child died, described in reporting as the first US measles death in a decade; a second unvaccinated child, age 8, died in early April. Texas health officials declared the outbreak over in August 2025 after 762 confirmed cases, 99 hospitalizations and two child deaths, making it the largest US outbreak in years. Public-health experts linked the scale of the outbreak to under-vaccination.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
Texas Department of State Health Services
OrganizationDirect responsibility
verified
The agency is recorded as the surveillance and response authority rather than a causal actor; contribution direction is neutral. The outbreak's scale is attributed in coverage to under-vaccination, not to the agency.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactWest Texas measles outbreak produces first US measles death in a decade
- strengthensDriverVaccine hesitancy and erosion of public trust in immunization
- weakensIndicators (2)First-dose measles vaccination coverage (global, MCV1)
impact weight 0.65 · Effect from 26 February 2025 · verified
The outbreak is the documented downstream consequence of accumulated under-vaccination; it is recorded as an expression of the hesitancy driver's real-world effect on disease burden.
- Worse
First-dose measles vaccination coverage (global, MCV1)
via Vaccine hesitancy and erosion of public trust in immunization
Weakens · Relationship strength 0.39 (weight 0.65 × strength 0.6)
Observed
84% of one-year-olds · 11 below the normal line (2024)
Worse than normal7 readings, 2018–2024: fell from 86.4% of one-year-olds to 84% of one-year-olds.
Above normal = better
- Worse
Strengthens · Relationship strength 0.26 (weight 0.65 × strength 0.4)
Observed
37.4 deaths per 1,000 live births · 12.4 above the normal line (2024)
Worse than normal7 readings, 2018–2024: fell from 40 deaths per 1,000 live births to 37.4 deaths per 1,000 live births.
Above normal = worse
Causal path
How this event connects to drivers and indicators in the graph.
- ActorTexas Department of State Health Services
- contributed toFactWest Texas measles outbreak produces first US measles death in a decade
- strengthensDriverVaccine hesitancy and erosion of public trust in immunization
- weakensIndicatorFirst-dose measles vaccination coverage (global, MCV1)
Cite this page
Factrail. (2026). West Texas measles outbreak produces first US measles death in a decade. Factrail. https://factrail.ai/facts/ph-fact-west-texas-measles-outbreak-2025
https://factrail.ai/facts/ph-fact-west-texas-measles-outbreak-2025
Accessed 15 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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