Overview
Since the beginning of 2026, and as at 28 October 2026, two countries in Europe have reported locally acquired cases of chikungunya virus disease: France (204 cases) and Italy (one case).
Since last week’s update, France has reported 22 new locally acquired chikungunya virus disease cases, bringing the total to 204 cases. These cases are distributed across 29 clusters, with seven new clusters identified: four in Gironde department, one in Var department, one in Val-de-Marne department and one in Seine-Saint-Denis department. Nineteen clusters are currently active, including the largest clusters in Prayssac (36 cases), Lot department, and Cavalaire-Sur-Mer (31 cases), in Var department. The cluster in Prignac-et-Marcamps (30 cases), in Gironde department, is now closed.
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 chikungunya virus disease case in Rome. The associated cluster is closed.
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.