Overview

• Italy has recorded 364 cases in 2025 through September 30, with 323 infections locally acquired and clusters centered in Emilia-Romagna and Veneto.
• France has logged more than 600 locally transmitted cases as of September 29, including reports from southern regions, Corsica, Burgundy, the Paris area and the Franco-German border.
• Germany has not confirmed any local transmission to date but reports 128 imported detections by September 28 and continues intensified monitoring.
• The ECDC reports the Asian tiger mosquito is established in 16 European countries, creating favorable conditions for local transmission.
• Chikungunya often brings sudden fever and severe joint pain, with higher risk for severe outcomes in infants, older adults and immunocompromised people, and STIKO advises single-dose vaccination for travelers aged 12 and up to outbreak areas.