Overview
- Four cases were confirmed by Uruguay’s public health lab on November 19 in three adults (46, 39, 21) and an 11-year-old, all without vaccination records.
- The family entered Argentina at Yacuiba–Salvador Mazza and traveled November 13–16 on long‑distance buses with stops in Salta, Jujuy, Buenos Aires and Entre Ríos before reaching Uruguay.
- Argentina’s Health Ministry issued a national alert on November 24 and instructed health teams to intensify surveillance for fever‑rash illness and verify immunization status.
- Provincial authorities activated targeted actions, including Salta’s reinforced case‑finding and Entre Ríos’ alert for passengers on a November 15 San José SRL Retiro–Federación service; no secondary cases have been reported.
- Buenos Aires Health Minister Nicolás Kreplak linked the risk to sharply reduced 2024 childhood vaccination coverage and criticized national policy as provincial teams undertake containment work.