Chikungunya worldwide overview
Situation update, March 2025
Since the beginning of 2025, and as of March, approximately 80 000 CHIKVD cases and 46 CHIKVD-related deaths have been reported in 14 countries/territories. Cases have been reported in the Americas, Africa and Asia, and while no cases have been reported in mainland Europe, in Reunion (an overseas department of France and outermost region of the European Union (EU)) a CHIKVD outbreak is ongoing and a case has also been reported in Mayotte (an overseas department and region of France).
In 2025 to date, the Americas accounts for the highest number of CHIKVD cases reported worldwide. As of March 2025 (data collected on 26 March 2025), the countries reporting the highest number of CHIKVD cases are Brazil (71 578), Argentina (1 550), Bolivia (77) and Peru (32). A complete list of the countries of the Americas reporting CHIKVD cases can be found on PAHO's dedicated website.
As of mid-March 2025, 393 CHIKVD cases were reported in Asia from Pakistan.
One African country has reported CHIKVD cases in 2025: Senegal (2).
To date, no autochthonous cases of CHIKVD have been reported in mainland Europe in 2025. However, over 13 000 CHIKVD cases have been reported from the French outermost region Reunion as of 16 March 2025. Cases have been reported in all of the island's municipalities. Due to the increase in the number of cases and the spread of outbreaks, Level 4 of the ORSEC 'Arboviruses' system has been activated, which corresponds to the circulation of a medium-intensity epidemic. One autochthonous cases of CHIKVD has also been reported in Mayotte (on 26 March 2025).
CHIKVD associated deaths have been reported from Brazil (44) and Reunion (2).
Three-month Chikungunya virus disease case notification rate per 100 000 population, January 2025 - March2025
ECDC assessment:
The likelihood of onward transmission of dengue and chikungunya virus in mainland EU/EEA is linked to importation of the virus by viraemic travellers into receptive areas with established and active competent vectors (e.g. Aedes albopictus and Aedes aegypti). Aedes albopictus is established in a large part of Europe. In Europe and neighbouring areas, Aedes aegypti is established in Cyprus, on the eastern shores of the Black Sea, and in the outermost region of Madeira.
The environmental conditions in the areas of the EU/EEA where Ae. albopictus or Ae. aegypti are established are currently unfavourable for mosquito activity and virus replication in mosquitoes; therefore, it is unlikely that locally acquired chikungunya and dengue virus transmissions will occur until conditions become favourable in early summer. All past autochthonous outbreaks of CHIKVD and dengue in mainland EU/EEA have so far occurred between June and November.
N.B: The data presented in this report originates from both official public health authorities and nonofficial sources, such as news media. Data completeness depends on the availability of reports from surveillance systems and their accuracy, which varies between countries. All data should be interpreted with caution and comparisons, particularly across countries, avoided, due to underreporting, variations in surveillance system structure, varying case definitions between countries and over time, and use of syndromic definitions.
Map
Twelve-month Chikungunya virus disease case notification rate per 100 000 population, April 2024-March 2025
Since the beginning of 2025, and as of March, approximately 80 000 CHIKVD cases and 46 CHIKVD-related deaths have been reported in 14 countries/territories. Cases have been reported in the Americas, Africa and Asia, and while no cases have been reported in mainland Europe, in Reunion (an overseas department of France and outermost region of the European Union (EU)) a CHIKVD outbreak is ongoing and a case has also been reported in Mayotte (an overseas department and region of France).
