The first case of chikungunya fever for the 2026-2027 season has been confirmed in the department of Orán, Salta province, Argentina. The National Epidemiological Bulletin (BEN) also reports four probable cases in the departments of Orán, General José de San Martín, and Anta, 17 discarded, and 80 under study. Intensified surveillance is recommended for the timely detection of new transmission hotspots. No new dengue cases were registered, maintaining a low-risk scenario. Of 480 suspected chikungunya cases reported, 2 were confirmed with a travel history to Brazil, 6 probable, 298 discarded, and 174 under study.
