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Outbreaks of chikungunya virus have become more frequent and widespread since 2004, with autochthonous transmission now noted in 119 countries. Once viewed as a health problem limited to tropical regions of Africa and Asia, the virus has resurged and spread to new regions of the world, reflecting the increased environmental suitability of these areas for the Aedes mosquito vector due to climate change.
Priya Venkatesan (Sun,) studied this question.