Cumulative cases since outbreak start — Santé publique France bulletin dated 2025-11-13
Official report date — in isolated zones, field onset typically precedes this by days to weeks.
The exact nature of this date (week of confirmation, transmission period, or bulletin publication date) is not specified by the source.
Santé publique France's 2025 season report: mainland France recorded 809 locally acquired chikungunya cases, 790 of them across 79 transmission episodes (1 to 144 cases per episode) and 19 isolated cases whose place of infection could not be determined, with symptom onset ranging from 27 May to 13 November 2025 — the highest case count and level of indigenous transmission recorded since enhanced surveillance began in 2006. Transmission episodes occurred in five regions already affected in prior years (Provence-Alpes-Côte d'Azur, Occitanie, Auvergne-Rhône-Alpes, Corsica, Île-de-France) plus three regions for the first time (Nouvelle-Aquitaine, Grand Est, Bourgogne-Franche-Comté). The scale is attributed to a concurrent chikungunya epidemic in the Indian Ocean, particularly Réunion, driven by a viral strain well suited to Aedes albopictus, the same mosquito that transmits it in mainland France. This 2025 mainland total is distinct from the 2026 season, whose first mainland autochthonous chikungunya case was recorded in the Tarn in July 2026, and from continued transmission in the overseas departments of Réunion and Mayotte. Source: Santé publique France, chikungunya, dengue and Zika in metropolitan France, 2025 report.
Case trend
Cite this page (Vancouver)
HealthWatch Global. Chikungunya outbreak — France [Internet]. 2025-11-13 [cited 2026 Aug 19]. Available from: https://healthwatch-global.com/en/outbreak/2bc33aef-c281-4e99-b3c7-7e876b8f83bf. Data source: Santé publique France.
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