Overview
- The national bulletin for epidemiological week 53 (cutoff Jan. 9, 2026) reports confirmed cases in 29 states and 24 deaths nationwide.
- Chihuahua remains the epicenter with about 4,486 infections and 21 fatalities, far exceeding counts in states such as Jalisco and Guerrero.
- Officials identified 277 active cases and 108 hospital admissions in 2025, with recent transmission concentrated in Jalisco and Chiapas.
- PAHO data show Mexico led the Region of the Americas in confirmed cases for 2025, a year in which the region lost its measles elimination status.
- Laboratories detected genotypes B3 and D8; separately, Mexico recorded 1,582 pertussis cases and 72 deaths in 2025, mostly among unvaccinated infants.