Center of disease control的 website上说：

来源: 新笔名123 于 2013-05-22 11:57:12 [] [旧帖] [给我悄悄话] 阅读数 : (138 bytes)

 HPV is so common that nearly all sexually-active men and women will  get at least one type of HPV at some point in their lives.

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