The Seychelles has year-round mosquito activity, with peak risk during the wet season from November through March when the northwest monsoon brings warm, humid conditions. The granitic inner islands including Mahe, Praslin, and La Digue have more vegetation and breeding habitat than the outer coralline atolls.
Dengue fever has been reported at moderate levels, with periodic outbreaks. The Seychelles has no malaria transmission. The islands tourism-dependent economy supports investment in vector control, but the tropical environment maintains mosquito populations.
Aedes albopictus is the dominant vector. The islands limited land area and tourism infrastructure mean that vector management is more feasible than on the mainland, but travelers should still use repellent during the wet season.
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Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.