Mexico has year-round mosquito activity in tropical coastal and southern states, with peak risk during the rainy season from June through October. The Pacific and Gulf coasts, the Yucatan Peninsula, and southern states like Chiapas, Oaxaca, and Guerrero carry the highest risk. Mexico City and the central highlands above 2,000 meters have minimal mosquito-borne disease transmission.
Dengue fever is the primary concern, with tens of thousands of cases annually concentrated in coastal and lowland states. Malaria (P. vivax) persists at low levels in parts of Chiapas and Oaxaca. Chikungunya, Zika, West Nile virus, and St. Louis encephalitis are also present.
Aedes aegypti is the dominant dengue and Zika vector in tropical urban areas. Aedes albopictus is expanding its range. Culex species transmit West Nile virus, primarily in northern states. Anopheles species carry malaria in limited southern foci.
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Explore mosquito risk briefings for other destinations in Central America & Caribbean.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.