日本腦炎是一種由蚊子傳播的急性腦炎。在台灣，三斑家蚊是主要的傳播媒介。由於蚊子多在黃昏和黎明時分活動頻繁，因此這些時段應避免前往戶外活動，以減少被蚊子叮咬的機會。
Japanese encephalitis is an acute encephalitis transmitted by mosquitoes. In Taiwan, Culex tritaeniorhynchus is the primary vector. As mosquitoes are most active during dawn and dusk, outdoor activities should be avoided during these times to reduce the risk of mosquito bites.
日本腦炎的傳播途徑主要是透過帶有病毒的蚊子叮咬人體。也就是說，病毒必須能夠在蚊子體內複製，並隨著蚊子的叮咬傳播給人類。這種人畜共通的傳染病，不會透過直接接觸病患的血液或分泌物來傳染。因此，隔離病患的血液和分泌物並非預防日本腦炎的主要措施。
Japanese encephalitis is primarily transmitted through the bite of an infected mosquito. In other words, the virus must be able to replicate within the mosquito and be transmitted to humans through the mosquito's bite. This zoonotic disease is not transmitted through direct contact with the blood or secretions of an infected person. Therefore, isolating the blood and secretions of patients is not a primary measure for preventing Japanese encephalitis.
前驅期會出現頭痛、倦怠的症狀
Prior to the onset of the acute phase, symptoms such as headache and fatigue may occur.
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