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Mexico Leads Americas Measles Outbreak as Vaccinations Slow

A sharp fall in weekly vaccinations has raised fresh concern over Mexico’s measles elimination status.

Overview

  • México has 14,036 confirmed measles cases and 35 deaths as of March 20, the highest totals in the Americas, according to federal health data and the Pan American Health Organization.
  • In an update Monday, the Health Ministry said 31,190,765 doses have been given since early 2025, yet shots delivered in the latest week fell about 70% from the prior tally with no explanation.
  • Jalisco, the 2026 epicenter, reports three straight weeks of decline and 58 new cases in the latest day, though state officials warn holiday travel during Semana Santa could revive spread.
  • Sonora counts 168 confirmed cases in 2026 with a 20.86% jump over 10 days and no deaths reported, placing the state among the country’s higher-burden areas this year.
  • OPS says sustained transmission could cost Mexico its measles elimination status at a November review and urges stronger surveillance and traveler vaccination before the 2026 World Cup, noting coverage near 80% falls short of the roughly 95% needed to block spread.