China has highly variable mosquito seasons across its vast territory. Southern provinces like Guangdong, Yunnan, and Hainan have near year-round activity with peaks from May through October. Central and northern regions have seasonal activity from June through September. The subtropical south and border areas with Southeast Asia carry the highest risk.
Dengue fever is the primary concern in southern China, particularly Guangdong province which reports the majority of cases. Japanese encephalitis is present in rural agricultural areas across central and southern China. Chikungunya circulates at lower levels. Malaria has been eliminated domestically, though imported cases occur.
Aedes aegypti and Aedes albopictus are the main dengue vectors in southern China. Culex tritaeniorhynchus transmits Japanese encephalitis near rice paddies. The Asian tiger mosquito (Ae. albopictus) has expanded its range northward in recent decades.
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Explore mosquito risk briefings for other destinations in East Asia.
Disease presence data is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a travel health professional before your trip.