Overview
- Surveillance recorded 6,481 suspected infections in 2025, of which 1,055 were laboratory confirmed.
- The national notification rate reached 13.65 cases per 100,000 residents after a decline in 2024 and a peak in 2023.
- Notifications were logged in 22 jurisdictions, concentrated in Córdoba, Buenos Aires Province, Buenos Aires City, Tierra del Fuego, Salta, Mendoza, Santa Fe, Entre Ríos and Tucumán.
- Tierra del Fuego had the highest cumulative incidence at 67.72 per 100,000, tied to outbreaks in Ushuaia and Río Grande.
- Children aged 0–5 years were most affected, with infants under one year accounting for 34.3% of confirmed cases and nine deaths reported, six in infants under six months.