The Comoros Islands have year-round mosquito activity, with peak risk during the hot, wet season from November through April. All inhabited islands (Grande Comore, Moheli, and Anjouan) carry malaria risk, with the lowland and coastal areas being most affected.
Malaria (P. falciparum and P. vivax) is the primary concern. Chikungunya has caused outbreaks across the archipelago. The islands have received targeted malaria control interventions with some success in reducing burden.
Anopheles gambiae is the dominant malaria vector. Aedes species transmit chikungunya. The small island setting means risk is relatively uniform, and travelers to any island should take antimalarial precautions.
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Explore mosquito risk briefings for other destinations in East Africa.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.