Background and epidemiology
Chikungunya virus (CHIKV) causes an infection predominantly spread to humans through the bite of infected Aedes mosquitoes. These mosquitoes are typically active during the daytime (in particular after sunrise and at dusk). Chikungunya virus typically circulates in tropical and subtropical regions of the world, in areas of Asia, Africa, Latin America and the Caribbean where the Aedes mosquitoes have a wide distribution. In recent years, these mosquitoes have also been found in parts of Europe (France, Italy and Spain) and the United States.
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