Surveillance for dengue, chikungunya, Zika, and West Nile virus infections relies on obligatory reporting. In the course of the energetic season of the *Aedes albopictus* vector mosquito (tiger mosquito) in mainland France—from Could 1 to November 30—that is supplemented by a seasonal enhanced surveillance system
Santé publique France experiences as of August 10, 2026, 5 episodes of autochthonous vector-borne transmission have been recognized in mainland France:
• 3 chikungunya episodes totaling 15 circumstances (1 to eight circumstances per episode) within the Tarn (Occitanie) and Gironde (Nouvelle-Aquitaine) departments.
• 2 dengue episodes (1 case per episode) within the Tarn and Hérault departments (Occitanie).
Bacterial vaginosis (BV) and the increased risk of sexually transmitted infection (STI) coinfections
Investigations and prevention and management measures are underway for these numerous occasions.
From Could 1—the beginning of enhanced surveillance—by means of August 9, 2026, the next had been recognized:
• 105 imported circumstances of chikungunya
• 295 imported circumstances of dengue
• 10 imported circumstances of Zika
Regarding West Nile virus, as of August 10, 2026, six autochthonous circumstances of West Nile virus an infection have been recognized in mainland France. These circumstances are positioned within the Provence-Alpes-Côte d’Azur area (Bouches-du-Rhône and Vaucluse departments) and the Occitanie area (Pyrénées-Orientales and Aude departments).
