Seasonal surveillance of chikungunya virus disease – 2026 (weekly)

Since the beginning of 2026 and as at 16 September 2026, two countries in Europe have reported locally acquired cases of chikungunya virus disease: France (75 cases) and Italy (one case).

A total of 18 additional locally acquired cases have been reported in Europe since the last update was published on 11 September.

Of the 13 clusters reported in France in 2026, 11 are currently active, including two new clusters, with one case in Créon and three cases in Biscarosse. The largest active cluster is still in Prignac-et-Marcamps in the department of Gironde, with a total of 30 cases. No new cases have been reported in Italy.

The report is available online.

ECDC will continue to monitor the situation and will publish a weekly report on the occurrence of chikungunya virus disease cases in the EU/EEA until November 2026.