Since the spring of 2025, French health authorities have observed a sharp increase in arboviruses in mainland France, marked by an uptick in the circulation of chikungunya and dengue.

Key Points Chikungunya, Dengue, and Zika Indigenous cases As of September 15, 2025, 65 outbreaks of locally transmitted chikungunya and dengue and a total of 505 cases have been...

Key Points Twelve episodes of local transmission detected 11 episodes of local transmission of chikungunya identified in the region as of September 11, 2025: one in Landes (1 case),...

Key Points In the Grand Est region, 45 imported cases of chikungunya, 34 imported cases of dengue, and 2 imported cases of Zika virus infection were identified between May 1 and...

Key Points In Occitanie, from May 1 to September 10, 2025, the following were identified: 86 imported cases of dengue, 99 imported cases of chikungunya, and 1 imported case of Zika 46...

Key Points Chikungunya, dengue, Zika Seven episodes of local transmission detected: Five outbreaks of local transmission of chikungunya identified in the region as of September 9, 2025,...

Key Points Chikungunya, Dengue, and Zika Indigenous cases As of September 8, 2025, 49 episodes of indigenous vector-borne transmission have been identified in mainland France: 38...

The Eybens Town Hall, in partnership with the Auvergne-Rhône-Alpes Regional Health Agency, Santé publique France, and the Interdepartmental Mosquito Control Association (EIRAD), is...

Key Points In Occitanie, from May 1 to September 2, 2025, the following were identified: 83 imported cases of dengue, 96 imported cases of chikungunya, and 1 imported case of Zika 40...

Key Points Chikungunya, Dengue, and Zika Indigenous cases As of September 2, 2025, 44 episodes of indigenous vector-borne transmission have been identified in mainland France: 34...