Chikungunya worldwide overview
Situation update, December 2024
In 2024 and as of 30 of November, approximately 480 000 CHIKVD cases and over 200 deaths have been reported worldwide. A total of 23 countries reported CHIKVD cases from the Americas (15), Asia (6), Africa (1) and Europe (1).
Three-month Chikungunya virus disease case notification rate per 100 000 population, September-December 2024
Overview
The majority of countries reporting high CHIKVD burden are from the Americas, in South and Central America. Countries reporting highest number of cases are:
- Brazil (407 250)
- Paraguay (3 104)
- Argentina (768)
- Bolivia (451).
Additional countries in the Americas reporting CHIKVD cases can be found at PAHO’s dedicated website.
CHIKVD associated deaths were reported from Brazil (203).
Asia
Africa
One African country reported CHIKVD cases in 2024: Senegal (9).
Europe
In 2024, one locally-acquired CHIKVD case has been reported in mainland Europe, by France. In addition, 44 locally-acquired CHIKVD cases have been reported from La Réunion. These are the first locally-acquired cases to be detected on the island since more than 10 years.
ECDC assessment:
The Americas is currently facing the largest ever outbreak of dengue. As a result, there has been a substantial increase in the number of imported cases of dengue to the EU/EEA since the beginning of the year.
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
Chikungunya virus disease case notification rate per 100 000 population, December 2023-November 2024
In 2024 and as of 30 of November, approximately 480 000 CHIKVD cases and over 200 deaths have been reported worldwide. A total of 23 countries reported CHIKVD cases from the Americas (15), Asia (6), Africa (1) and Europe (1).
