Pathfinder
Editor, Senior Moderator
Translation Google
Chikungunya, Dengue, Zika, and West Nile Virus in mainland France. Enhanced Surveillance Bulletin, November 12, 2026.
Published on 12 November 2026
Key Points
Chikungunya, Dengue, and Zika
Indigenous Cases
As of November 9, 2026, 36 outbreaks (+1 new outbreak compared to the previous week) of locally transmitted vector-borne disease have been identified in mainland France:- 31 episodes of chikungunya (+1 new episode compared to the previous week), totaling 214 cases (1 to 38 cases per episode) 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).
Imported Cases
From May 1, when enhanced surveillance began, through November 8, 2026, the following were identified:- 168 imported cases of chikungunya
- 507 imported cases of dengue
- 17 imported cases of Zika
West Nile virus infections
Indigenous cases
- As of November 9, 2026, 222 locally acquired cases of West Nile virus infection (+10 compared to the previous week) have been identified in mainland France. They are located in the Provence-Alpes-Côte d'Azur region (3 departments), Occitanie (7 departments), Île-de-France (7 departments), Auvergne-Rhône-Alpes (5 departments), Nouvelle-Aquitaine (2 departments), Pays de la Loire (4 departments), Centre-Val de Loire (Loiret department), and Corsica (2 departments). For 20 cases, no specific site of infection could be identified. For one of these cases, it could not be determined whether the infection was locally acquired or imported.