Overview

• ECDC data show 27 chikungunya outbreaks so far this year, marking a continental high.
• West Nile infections reached 335 with 19 deaths by mid‑August, with Italy the most affected country at 247 cases.
• Aedes albopictus is now established in 16 countries and 369 regions, far above levels a decade ago.
• Officials highlighted a first locally acquired chikungunya case in France’s Alsace in July, signaling northward spread.
• Health authorities expect transmissions to rise through August and September and urge bite‑prevention measures for residents and travelers, especially vulnerable groups.