Mozzwise Briefing

Sao Tome and Principe has year-round mosquito activity on both islands, with peak risk during the rainy season from October through May. The low-lying coastal areas and river valleys carry the highest risk. The mountainous interior of Sao Tome has somewhat lower but still present exposure.

Dengue fever is present at moderate levels. The islands have made significant progress on malaria reduction, though occasional cases still occur. The small geographic area and island setting allow for more concentrated vector control efforts.

Aedes aegypti is the primary dengue vector. Anopheles species persist at reduced levels due to ongoing control efforts. The volcanic island terrain and tropical humidity support mosquito breeding, particularly during the wet season.