Chikungunya virus outbreaks have been reported in Brazil since 2014 and have not subsided in 2025. According to new data, the highest risk to international travelers of contracting this mosquito-transmitted disease is around São Paulo and Rio de Janeiro.
As of January 17, 2025, the Pan American Health Organization (PAHO) reported that 523 Chikungunya virus (CHIKV) cases were confirmed in Brazil during the initial two weeks of 2025.
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