Europe disease surveillance
Chikungunya in Europe — 2025–2026 case data
In 2025, Italy reported the most Chikungunya cases of any EU/EEA country — 384 autochthonous cases, ahead of France (809). No autochthonous human Chikungunya cases are reported in the tracked countries so far in 2026. Figures cover the countries Mosticare tracks (updated 31 May 2026); ECDC publishes the full EU/EEA total.
Last updated · 31 May 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
Italy reported 384 autochthonous (locally-acquired) chikungunya cases in 2025 across four regions — Emilia-Romagna, Veneto, Toscana and Lazio — out of 472 total cases including travel-imported ones, with no deaths. All Italian and French CHIKV clusters were declared closed by the end of 2025.
Source: Istituto Superiore di Sanità (ISS) · verified 31 May 2026
The data
| Country / region | Disease | Cases | Deaths | Period | Source | Updated |
|---|---|---|---|---|---|---|
| France | Chikungunya | 0 | 0 | 2026 enhanced-surveillance period (1 May – 30 November) | Santé publique France · enhanced arbovirus surveillance | 31 May 2026 |
| Italy | Chikungunya | 0 | 0 | 2026 transmission season (year-to-date) | Istituto Superiore di Sanità (ISS) | 31 May 2026 |
| France | Chikungunya | 809 | 0 | 2025 enhanced-surveillance period (1 May – 30 November) | Santé publique France · enhanced arbovirus surveillance | 25 May 2026 |
| Italy | Chikungunya | 384 | 0 | 2025 transmission season | Istituto Superiore di Sanità (ISS) | 31 May 2026 |
About Chikungunya
Chikungunya is an arbovirus transmitted in Europe by the Asian tiger mosquito, Aedes albopictus — an aggressive daytime biter that has expanded steadily northward since 2005. Autochthonous (locally-acquired) outbreaks in continental Europe are clustered, episodic, and concentrated in the Mediterranean rim, though 2025 saw transmission reach further north in France than ever before. Enhanced arbovirus surveillance typically runs from 1 May to 30 November.
Frequently asked questions
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 autochthonous chikungunya cases did Italy report in 2025?
Italy reported 384 autochthonous (locally-acquired) chikungunya cases in 2025 across four regions — Emilia-Romagna, Veneto, Toscana and Lazio — out of 472 total cases including travel-imported ones, with no deaths. All Italian and French CHIKV clusters were declared closed by the end of 2025.
How many Chikungunya cases were reported in Europe in 2025?
Across the countries Mosticare tracks, 2025 Chikungunya cases were: France 809, Italy 384. These are national totals from each country's health authority; for the complete EU/EEA figure, ECDC's surveillance is the primary source.
How many Chikungunya cases have been reported in Europe in 2026?
As of 31 May 2026, the countries Mosticare tracks report no autochthonous human Chikungunya cases year-to-date in 2026. The feed is refreshed weekly during transmission season.
Which mosquito transmits Chikungunya in Europe?
Chikungunya is transmitted in Europe by Aedes albopictus (Asian tiger mosquito). The fastest-expanding vector in Europe since 2005. Daytime feeder, striped legs, thrives in peri-urban water traps.
Which mosquito spreads chikungunya in Europe?
In Europe chikungunya is spread by Aedes albopictus, the Asian tiger mosquito — a daytime-biting species established across the Mediterranean basin and expanding northward by roughly 150 km per decade.
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.