April 19, 2024

Overview

Europe

No autochthonous cases have been reported in Europe in 2023.

Americas and the Caribbean

Countries reporting highest number of cases are

  • Brazil (71 487)
  • Paraguay (2 760)
  • Argentina (156)
  • Bolivia (126). 

Additional countries in the Americas reporting CHIKVD cases can be found at PAHO’s dedicated website.

Asia

CHIKVD cases have been reported from:

  • Timor Leste (195)
  • Thailand (139)
  • Pakistan (26)
  • Malaysia (6).

Africa 

One African country reported CHIKVD cases in 2024: Senegal (3).

ECDC assessment

Chikungunya virus disease and dengue affect people in most countries of the tropics and sub-tropics. EU/EEA citizens travelling to the affected areas should apply personal protective measures against mosquito bites.

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. Aedes aegypti is established notably in Cyprus, on the eastern shores of the Black Sea and in the outermost region of Madeira.

The current likelihood of the occurrence of local transmission events of chikungunya and dengue viruses in areas where the vectors are present in mainland EU/EEA is moderate, as the environmental conditions are becoming less favourable for vector activity and virus replication in vectors. In 2023, locally-acquired dengue cases been reported in France, Italy and Spain.

All autochthonous outbreaks of CHIVD and dengue in mainland EU/EEA have so far occurred between June and November.

More information is available on autochthonous transmission of chikungunya and dengue virus in the EU/EEA on ECDC’s webpages, and in ECDC’s factsheets on dengue and CHIKVD.

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.

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