Vanuatu has year-round mosquito activity across its tropical island chain, with peak risk during the wet season from November through April. The larger islands of Efate, Espiritu Santo, and Malakula carry the highest exposure. Coastal areas and areas near standing water are primary breeding sites.
Dengue fever is the primary concern, with moderate activity and periodic outbreaks. Vanuatu has historically had malaria transmission, but cases have declined significantly with control efforts. The scattered island geography creates varied risk between islands.
Aedes aegypti transmits dengue in populated areas. Anopheles farauti is the primary malaria vector on some islands. The tropical climate and heavy rainfall maintain mosquito breeding habitat year-round.
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Explore mosquito risk briefings for other destinations in Oceania.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.