不是百分之一百。没有读过关于一次性行为的研究报告。

想必这样的研究课题很难进行。

下面是摘抄的：

A study published in 1994 in The New England Journal of Medicine looked
at 256 heterosexual HIV-discordant couples. Of the 124 couples that consistently
used condoms, none of the HIV-negative partners were infected. Among the
121 couples that did not consistently use condoms, 12 (about 10 percent)
of the HIV-negative partners became infected. Additional studies found similar
results.

With HIV, a single act of unprotected vaginal or rectal intercourse MAY
be sufficient for transmission. But it is believed that in the vast majority
of cases, repeated exposure to the virus through multiple acts of intercourse
is necessary for transmission to take place.

所有跟帖： 

• 统计都是宏观的,微观到每个单独案例只有yes和no,百分比几乎没有用处. -fitgirl- ♀ (0 bytes) () 09/21/2006 postreply 16:39:23

• 秀手等待不是上策。 -TristateMD- ♀ (716 bytes) () 09/21/2006 postreply 17:12:10

• 同意。如果楼主和她/他已经有了性接触，就应该尽快看医生。 -老道- ♂ (0 bytes) () 09/21/2006 postreply 17:32:00

• 我说的就是这个意思，赶紧去看医生，对人对己都好。 -fitgirl- ♀ (139 bytes) () 09/21/2006 postreply 20:29:37

• agree. for the individual, if you are hit, it's 100% 4 you -treasure- ♀ (23 bytes) () 09/21/2006 postreply 17:13:13

• 老话说的不怕一万，就怕万一，就是这个意思啊。 -fitgirl- ♀ (0 bytes) () 09/21/2006 postreply 20:31:01

• 从病人的角度可以这么讲。但对医生来讲，发病率可以指导预防性治疗.. -老道- ♂ (0 bytes) () 09/21/2006 postreply 17:18:38

• 这我同意，但我们现在不是在搞医学研究。 -fitgirl- ♀ (0 bytes) () 09/21/2006 postreply 20:31:50