Country surveillance profile
Mosquito-borne disease in France — 2025–2026 data
As of 10 June 2026, Mosticare tracks France surveillance for West Nile virus and Chikungunya. France had the largest autochthonous chikungunya outbreak in continental Europe in 2025 — 809 locally-acquired cases across 79 transmission episodes (1 May – 30 November), with symptom onset between 27 May and 13 November. Each figure cites the responsible national or EU authority.
Last updated · 10 June 2026 · CC BY 4.0
Key facts
France had the largest autochthonous chikungunya outbreak in continental Europe in 2025 — 809 locally-acquired cases across 79 transmission episodes (1 May – 30 November), with symptom onset between 27 May and 13 November. It was the largest continental-European autochthonous CHIKV outbreak on record for that year.
Source: Santé publique France · enhanced arbovirus surveillance · verified 25 May 2026
The data
| Country / region | Disease | Cases | Deaths | Period | Source | Updated |
|---|---|---|---|---|---|---|
| France | West Nile virus | 0 | 0 | 2026 transmission season (year-to-date) | Santé publique France | 10 June 2026 |
| France | Chikungunya | 0 | 0 | 2026 enhanced-surveillance period (1 May – 30 November) | Santé publique France · enhanced arbovirus surveillance | 31 May 2026 |
| France | Chikungunya | 809 | 0 | 2025 enhanced-surveillance period (1 May – 30 November) | Santé publique France · enhanced arbovirus surveillance | 25 May 2026 |
| France | West Nile virus | 62 | 0 | 2025 transmission season | Santé publique France | 25 May 2026 |
About surveillance in France
France runs year-round West Nile virus surveillance and an enhanced arbovirus programme (1 May – 30 November) for chikungunya and dengue, led by Santé publique France. In 2025 metropolitan France recorded the largest autochthonous chikungunya outbreak in continental Europe.
Frequently asked questions
What mosquito-borne diseases is France monitoring in 2026?
Mosticare tracks France surveillance for West Nile virus and Chikungunya, each sourced to the responsible national authority or ECDC.
What was the largest chikungunya outbreak in Europe in 2025?
France had the largest autochthonous chikungunya outbreak in continental Europe in 2025 — 809 locally-acquired cases across 79 transmission episodes (1 May – 30 November), with symptom onset between 27 May and 13 November. It was the largest continental-European autochthonous CHIKV outbreak on record for that year.
How many West Nile virus cases did France report in 2025?
France reported 62 West Nile virus cases in 2025 (2025 transmission season), per Santé publique France.
How many Chikungunya cases did France report in 2025?
France reported 809 Chikungunya cases in 2025 (2025 enhanced-surveillance period (1 May – 30 November)), per Santé publique France · enhanced arbovirus surveillance.
Sources
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About this data
Mosticare aggregates and re-publishes vector-borne disease surveillance from ECDC, EFSA, and national ministries of health. Mosticare is an aggregator, not a primary surveillance authority — every figure on this page cites the originating source and is independently verifiable. This is a partial aggregation; for the complete EU/EEA totals, ECDC is the primary source.
The data behind this page is published as a free, machine-readable feed under CC BY 4.0: /threat-map/feed.json (JSON Schema). See the live Europe threat map and the full data room.