Overview
- Mexico has confirmed 5,610 measles cases as of December 10, and its health secretary says the country is close to losing its measles‑free certification if transmission continues into early 2026.
- The CDC reports about 1,912 U.S. cases across 43 states this year linked to 47 outbreaks, including 111 cases in Spartanburg County, South Carolina, where more than 250 people are under quarantine and most infections are in the unvaccinated.
- Mexican officials report nearly 10 million measles vaccine doses administered during the response, yet full-schedule coverage is about 81.1%, short of the roughly 93–95% needed to prevent sustained spread.
- Baja California authorities say a local cluster remains limited to five confirmed cases after rapid house‑to‑house vaccination, with new weekend mass clinics set up in Tijuana and Ensenada.
- Argentina will advance the second MMR dose to 18 months starting in 2026 following national approval, aiming to protect children sooner in the face of regional resurgence.