目的：研究皖北地区经输血传播病毒（TTV）在血透患者中的感染。
Objective:To study the infection of transfusion transmitted virus(TTV) in hemodialysis patients in Wanbei.
登革病毒通过雌性伊蚊的叮咬传播到人类，这要求病毒通过伊蚊的取食传播，通常是一个已感染的患者的血。
The dengue viruses are transmitted to humans through the bite of a female Aedes mosquito, which acquires the viruses while feeding, normally on the blood of an infected person.
一些不同种类的伊蚊和趋血蚊传播病毒。
Several different species of the Aedes and Haemogogus mosquitoes transmit the virus.
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