Mexico Administers 25 Million Measles Shots as 17,000-Case Outbreak Recedes
Updated
Updated · CNN · May 17
Mexico Administers 25 Million Measles Shots as 17,000-Case Outbreak Recedes
3 articles · Updated · CNN · May 17
25 million measles shots have been administered across Mexico in recent weeks, federal officials said, and case counts have now fallen sharply after an epidemic that killed at least 40 people and infected more than 17,000.
Chihuahua, where the outbreak began after an unvaccinated 9-year-old returned from Seminole, Texas, became the initial epicenter; officials say low vaccination coverage let the virus spread through Mennonite communities and Indigenous farmworkers.
Coverage gaps were severe: only about two-thirds of 1-year-olds in Chihuahua got a first measles shot in 2024, Mexico's national rate had slipped below 80% by 2023, and some Mennonite neighborhoods were only around 30% vaccinated.
Authorities responded by translating guidance into Low German, sending vaccinators door to door and expanding the campaign statewide before the epicenter shifted about 800 miles south to Jalisco, where officials even ordered masks in Guadalajara schools.
The outbreak traces to the same D8 lineage seen in Canada and Texas, underscoring how cross-border travel and declining immunization can reignite measles even in countries that eliminated it more than 25 years ago.
After a 25-year victory, is North America's measles-free status gone for good?
A single case crossed borders and ignited a crisis. How vulnerable is the continent to the next virus?
With millions still unvaccinated, can trust in public health be rebuilt to stop the next outbreak?
As of late April 2026, Mexico is facing a major measles outbreak that threatens its measles elimination status, first achieved in 1996 after extensive vaccination efforts. This crisis comes as the entire Region of the Americas, including the United States and Canada, lost its measles elimination status in November 2025 due to persistent endemic transmission, especially in Canada. Ongoing outbreaks in Mexico have contributed to rising regional case counts, highlighting the urgent need for renewed vaccination campaigns and strong public health responses to prevent further spread and protect vulnerable communities.