Overview
- Baja California ran a weekend macro vaccination drive in Mexicali after five related cases in one family, receiving 90,000 additional doses and deploying workplace and house‑to‑house brigades statewide.
- The Mexicali cluster involves four children aged 1–9 and a 26‑year‑old adult, none vaccinated, who developed symptoms after a recent trip to Chiapas.
- Mexico City will open six vaccination modules along the route to the Basilica of Guadalupe starting December 10 and conduct operations at the airport and bus terminals; the city has 12 confirmed cases, with 5,504 accumulated nationwide as of December 4.
- Argentina confirmed by rt‑PCR a measles infection in a two‑year‑old from Santa Elena, Entre Ríos; the child is clinically stable in home isolation as contact follow‑up and blocking vaccination proceed.
- Santa Fe activated an epidemiologic operation in Casilda tied to the Entre Ríos case, identifying contacts, updating vaccination, issuing regional alerts, and supporting a national epidemiological alert.