http://www.who.int/diagnostics_laboratory/faq/window_period/en/Window periodWhat is the "window-period" and how long is it? 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. 这个是不是有点激进 请各位版主佐证!
还有接下来的问答http://www.who.int/diagnostics_laboratory/faq/en/
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