Overview
- The Boletín Epidemiológico Nacional reported new cases in epidemiological week 21 that bring the confirmed total for 2026 to 47.
- The 2025–2026 surveillance season, defined from SE27/2025 to SE20/2026, has a cumulative total of 107 confirmed hantavirus cases.
- The Central region holds 54% of season cases, with Buenos Aires province recording 44 confirmed infections.
- The Northwest region (NOA) has the highest incidence at 0.63 cases per 100,000, with 37 cases overall and 81% of those in Salta.
- Health officials note hantavirus spreads when people inhale aerosols from rodent urine, saliva, or feces in rural, peri‑domestic, or enclosed infested spaces and stress rodent control, ventilation, and prompt care because illness can progress from flu‑like symptoms to severe cardiopulmonary failure.