... in response to Don't agree, posted by BubbaGump on Feb 21, 2002I got these statistics from the NIH. I think they are from 1994 so they are old. I don't have a current web site for them.
Anal intercourse: 1 in 5 chance of transmitting HIV.
Coitus : 1 in 100 chance of transmitting HIV.
There are some other statistics concerning exposure to infected blood externally, exposure to infected semen orally, etc. but I don't remember those. Cunnilingus transmission rates are not measurable because there is no reliable data so far.
Transmission of HIV from a man to a woman with coitus is most likely from infected semem. Transmission of HIV from a woman to a man with coitus is more likely from menstrual discharge(blood), pus from sores, and blood from chafing. The man's infection points are exposed sores, chafing wounds, and infection inside the urethra.
A condom will dramatically reduce the chances of infection from a woman to a man because normal vaginal fluids are unlikely to contain HIV. Unfortunately, a condom does not offer as high a protection to a woman because there is more likelihood of leakage of infected semem through various mishaps during coitus.
Some of this information may have changed since 1994 but most of it should be accurate.
-blm