Equatorial Guinea has year-round mosquito activity, with peak risk during the rainy seasons from September through December and February through June. Both the mainland (Rio Muni) and the island of Bioko carry high malaria risk. The tropical forest environment and equatorial humidity support intense mosquito breeding.
Yellow fever is the primary endemic concern. Malaria (P. falciparum) is also a major concern, particularly on the mainland. Bioko Island has received significant malaria control investment, reducing but not eliminating transmission there.
Anopheles gambiae is the dominant malaria vector. Aedes aegypti transmits yellow fever. The small national territory and equatorial location mean risk is broadly distributed across all areas.
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Explore mosquito risk briefings for other destinations in Central 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.