Fig. 2: Map of endemic and epidemic countries and level of evidence defined as follows.
From: Global burden of chikungunya virus infections and the potential benefit of vaccination campaigns
Endemic: CHIKV circulates persistently on the territory, with infections occurring every year. Epidemic: CHIKV circulates sporadically on the territory, with outbreak being followed by years without detected circulation. No transmission: CHIKV does not circulate on the territory. Good evidence: Epidemiological data from disease surveillance and/or serological data and/or entomological data provide robust evidence for given classification. Poor evidence: Epidemiological, serological and entomological data do not provide robust evidence for given likely classification.
