Key Points

Indigenous Cases 

As of November 2, 2026, 35 outbreaks (+1 new outbreak compared to the previous week) of indigenous vector-borne transmission were identified in mainland France:

• 30 chikungunya outbreaks (+1 new outbreak compared to the previous week), totaling 208 cases (1 to 36 cases per outbreak) in the Tarn, Lot, and Gard departments (Occitanie), in Gironde, Landes, and Pyrénées-Atlantiques (Nouvelle-Aquitaine), Val-de-Marne, and Seine-Saint-Denis (Île-de-France), Var (Provence-Alpes-Côte d’Azur), and Drôme (Auvergne-Rhône-Alpes);
• 5 dengue outbreaks (no new outbreaks compared to the previous week) totaling 8 cases (1 to 2 cases per outbreak) in the Tarn, the Hérault (Occitanie), the Bouches-du-Rhône, the Var (Provence-Alpes-Côte d'Azur), and the Dordogne (Nouvelle-Aquitaine).

Investigations and prevention and control measures are underway for the various outbreaks that are still active.

Imported Cases 

From May 1, when enhanced surveillance began, through November 1, 2026, the following were identified:

• 165 imported cases of chikungunya
• 479 imported cases of dengue
• 17 imported cases of Zika