Overview
Since the beginning of 2026 and as at 11 November 2026, two countries in Europe have reported locally acquired cases of chikungunya virus disease: France (213 cases) and Italy (1 case).
Since last week’s update, France has reported six new locally acquired chikungunya virus disease cases, bringing the total to 213. These cases are distributed across 31 clusters, with one additional cluster reported in the Seine-Saint-Denis department. However, this newly identified cluster is already considered closed. Fourteen clusters are currently active, including the two largest clusters in Prayssac (38 cases, Lot department) and Cavalaire-sur-Mer (34 cases, Var department).
No new locally acquired chikungunya virus disease cases have been reported by Italy since last week’s update. To date, Italy has reported one locally acquired case of chikungunya virus disease in Rome. The associated cluster is closed.
On 4 November, the health authorities of the Swiss Canton of Ticino, in coordination with the Swiss federal authorities, announced four locally acquired cases of chikungunya virus disease in the Piana di Magadino area of Ticino, Switzerland. These are the first locally acquired chikungunya virus disease cases ever reported in the country. As Switzerland does not report data to ECDC, these cases are not included in the map and table below.
The latest weekly seasonal surveillance report showing geographical areas with locally acquired cases is available online.
ECDC assessment
The current chikungunya virus disease risk assessment for mainland EU/EEA is available on ECDC’s dedicated chikungunya virus disease webpage.