Yemen has year-round mosquito activity in the coastal lowlands and seasonal activity in the highlands, with peak risk during the rainy seasons. The Tihama coastal plain along the Red Sea, the Hadramaut Valley, and low-lying areas carry the highest risk. The highland cities like Sanaa have lower but present exposure. The ongoing conflict has devastated health infrastructure.
Dengue fever is a primary concern with high activity, causing large outbreaks in urban areas. Malaria (P. falciparum and P. vivax) remains endemic in lowland areas. The collapse of health services and water infrastructure has dramatically amplified mosquito breeding and disease transmission.
Aedes aegypti transmits dengue in urban areas. Anopheles stephensi and other Anopheles species carry malaria in lowland and coastal areas. The humanitarian crisis means vector control is minimal and population vulnerability is extremely high.
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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.