Overview

• Santé publique France reports 30 autochthonous transmission foci as of August 26 with three newly detected episodes in Occitanie, Provence‑Alpes‑Côte d’Azur and Nouvelle‑Aquitaine.
• Cases now span PACA, Corsica, Occitanie, Auvergne‑Rhône‑Alpes and, for the first time, Grand Est, Nouvelle‑Aquitaine and Bourgogne‑Franche‑Comté.
• In Bergerac (Dordogne), local authorities count more than thirty infections in a single cluster and are conducting door‑to‑door investigations and repeated insecticide spraying.
• Dengue monitoring shows seven identified foci this season with four already closed, below last year’s autochthonous tally.
• West Nile surveillance has identified 15 local cases with first detections this season in Île‑de‑France, as EU health officials warn of a climate‑driven new normal.