Travel-associated chikungunya virus disease cases reported to ECDC by place of infection

This page presents travel-associated chikungunya virus disease cases reported to ECDC by likely place of infection. The maps and downloadable tables show the number of reported cases and rates per 100 000 travellers arriving in the European Union/European Economic Area (EU/EEA), by place of infection. The aim is to inform public health authorities and EU/EEA citizens about travel-associated chikungunya virus disease and support travel health advice. 

Note: This page includes only cases with a likely place of infection outside mainland EU/EEA. Cases with a likely place of infection in mainland EU/EEA are not included. 

Travel-associated chikungunya virus disease cases reported to ECDC, by place of infection, 2024

Travel-associated chikungunya virus disease cases reported to ECDC, by place of infection, 2020–2024 

Rates of travel-associated chikungunya virus disease cases among 100 000 travellers arriving in the EU/EEA, by place of infection, 2024 

Rates of travel-associated chikungunya virus disease cases among 100 000 travellers arriving in the EU/EEA, by place of infection, 2020–2024 

Download the data

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About the data

These data are based on confirmed chikungunya virus disease cases reported to ECDC by EU/EEA countries through the EpiPulse Cases platform, as of December 2025. It includes only cases diagnosed in the EU/EEA with a single place of infection specified.   

Data on the place of infection were provided at the sub-national level for the EU outermost regions*, while for other locations, the data were at the national level. People who were infected in the EU outermost regions were classified as travel-associated, and each outermost region was treated separately as a place of infection in the analysis. Cases with a place of infection in mainland EU/EEA were excluded. 

For all data included in this overview, outlying observations were excluded. Places of infection are included in the maps if they are linked to confirmed cases reported over the past five years and meet at least one of the following criteria: 

• they were identified in at least two different years; or 
• they were reported by at least two different EU/EEA countries; or 
• at least five cases were reported for the same place of infection.  

Travel-associated chikungunya virus disease rates among travellers were calculated using EpiPulse Cases data from 2020–2024 and IATA MarketIS data on air passenger flows (extracted on 5 December 2025). MarketIS captures passenger volumes on direct and connecting flights from point A to point B, including itineraries with layovers of 18 hours or less. These data were further filtered to include flights scheduled between 2020 and 2024 from any country or EU outermost region worldwide to mainland EU/EEA. 

Rates of travel-associated chikungunya virus disease cases among travellers were calculated as follows: 

Confidence intervals were calculated using the Clopper-Pearson method.  

The data presented in this summary should be interpreted with caution for the following reasons: 

• The data are presented as reported by EU/EEA countries and have not been validated by the health authorities in the places of infection. 
• This summary does not account for regional variation within places of infection, and the risk of infection may be higher in some areas than in others. 
• The data cover only the years 2020–2024 and do not necessarily indicate ongoing transmission in the places shown. 
• The analysis is based only on MarketIS flight data, which include direct flights and connecting flights, and exclude other forms of international travel such as bus, train, boat and car. 

* EU outermost regions include Guadeloupe, French Guiana, Réunion, Martinique, Mayotte and Saint-Martin (France), the Azores and Madeira (Portugal), and the Canary Islands (Spain).