Dear cdc,
    Thanks for your reply,i wonder whether you could provide me with some info on the window period.In china,the doctors recommend that the window period is 2-8weeks.They say 6 weeks is almost accutate,while some info from the western countries say that it should be 3-6 month.It is really confusing.What's your suggestion for that?
Regard,
        Qingwei

    CDC你好，我想知道一些关于窗口期的问题。我感到很迷惑，因为在中国，有的医生建议窗口期是2-8周，而6周就已经很准确了。可是来自西方国家的信息又有的说必须要3-6个月。请告诉我你们对窗口期的看法是什么。
此致
        轻微

    Thank you for contacting the CDC National Prevention Information Network.
We are glad to help you. The tests commonly used to detect HIV infection are actually looking for antibodies produced by an individual’s immune system when they are exposed to HIV. Most people will develop detectable antibodies within two to eight weeks (the average is 25 days). Ninety seven percent will develop antibodies in the first three months following the time of their infection. In very rare cases, it can take up to six months to develop antibodies to HIV.
    Please feel free to contact us if you need further assistance.
LG#630
    通常我们使用的HIV测试是寻找个体免疫系统遇到HIV时所产生的抗体。大部分人都能在2-8周内产生能检查出的抗体（平均是25天）。97%的人能在感染上HIV之后的3个月内产生抗体。有的人要6个月才能产生HIV抗体，不过这是非常非常罕见的。
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