Window period(窗口期)What is the "window-period" and how long is it?(什么是窗口期,窗口期有多久?) This is the time between original infection with HIV and the appearance of Detectable antibodies to the virus, normally a period of about 14-21 days.(这个就是距离感染到产生抗体的时间,通常是14-21天)
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