Overview
- Mexico has logged 5,625 confirmed measles cases as of Dec. 11, with federal officials warning the country could forfeit its elimination certification if transmission persists into early 2026 after applying more than 10 million vaccine doses.
- Chihuahua remains the epicenter with 4,464 confirmed infections, while Jalisco (364) and Michoacán (205) report rising counts, prompting targeted drives such as Tlaquepaque’s campaign ending Dec. 12 and Baja California’s containment of a five‑case cluster with mass clinics Dec. 13–14.
- The United States has recorded about 1,912 cases across 43 states this year, far above recent years, with 47 identified outbreaks, according to the CDC.
- South Carolina’s Spartanburg County reports 111 confirmed cases tied largely to exposures linked to a church, with at least 254 people in quarantine and most infections in unvaccinated individuals, state health officials say.
- PAHO says the Americas no longer hold regional measles elimination status after Canada lost its certification, as Argentina’s Entre Ríos confirms a case and investigates additional suspects with isolation, contact checks and localized vaccination.