Based on data submitted up until and including 4 November 2026.
Since the beginning of 2026 and as at 4 November 2026, two countries in Europe have reported locally acquired1 cases of chikungunya virus disease: France (207 cases) and Italy (1 case).
Since last week’s update, France has reported three new locally acquired chikungunya virus disease cases, bringing the total to 207 cases. These cases are distributed across 30 clusters2, with one new cluster identified in the Drôme department. Sixteen clusters are currently active, including the largest two clusters in Prayssac (36 cases), Lot department, and Cavalaire-Sur-Mer (32 cases), in Var department, and four clusters have been closed since last week.
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.
In addition, on 4 November, Swiss authorities and media reported that four locally acquired cases of chikungunya in the Piana di Magadino area of Ticino, Switzerland were confirmed. These are the first locally acquired chikungunya cases ever reported in the country. As Switzerland is not reporting data to ECDC, these cases are not included in the map and table below.
Please find the current chikungunya virus disease risk assessment for mainland EU/EEA on ECDC’s dedicated chikungunya webpage.
Chikungunya is a mosquito-borne viral disease that is emerging in
Europe, with locally acquired cases reported in several EU/EEA
countries. In the light of this development, the European Centre for
Disease Prevention and Control has implemented seasonal enhanced
surveillance to monitor the occurrence of cases in the EU/EEA. The
primary objective is to inform public health authorities and support the
implementation of appropriate response measures.
Chikungunya virus
disease is a notifiable disease at the EU level and cases are reported
in accordance with the
EU
case definition. The table and map in this report show the countries
and areas where chikungunya virus disease cases – and their
corresponding case numbers – are reported to the European surveillance
portal for infectious diseases (EpiPulse Cases). In most instances, the
first case reported in a cluster should be confirmed in accordance with
the EU case definition. In specific situations, and at the discretion of
the reporting country, a probable case may be used to designate a new
cluster when confirmation is not available within a reasonable
timeframe.
Please note that cases acquired in Portuguese and
Spanish Outermost Regions are included. However, due to the distinct
epidemiological situation and differences in surveillance systems, cases
acquired in the French Outermost Regions are not included.
Here we
present the report as at 4 November 2026.
*Nomenclature of territorial units for statistics
**Local administrative unit
When importing case_summary.csv in MS Excel, please do not forget to select Unicode (UTF-8) as encoding.
Case summary (.csv)Please follow the link to open the interactive dashboard.