How can sexual transmission of HIV be prevented?
The only way to completely avoid the sexual transmission of HIV is to abstain from anal, oral and vaginal sexual. If you choose to have sex, it is safest when you practice monogamy with an uninfected partner. Monogamy is when two people have sex only with each other. For those with a new sex partner, both can abstain from sex, or use condoms every time during anal, vaginal and oral sex for at least 3 months and then get tested for HIV and other STDs. At that time, if both partners are HIV negative AND both partners are completely avoiding other risk behaviors (e.g., sharing needles or having other sex partners), then unprotected sex with each other is not a risk for HIV transmission. For someone with an HIV positive partner or a partner who does not know his/her HIV status or multiple sexual partners, touching, dry kissing, body rubbing, and mutual masturbation are the safest sexual activities. However, simple, skin-to-skin touching can spread other STDs. For any penetrative sex acts such as vaginal, anal or oral sex, condoms are highly effective at reducing the risk of HIV transmission when used consistently and correctly - every time, from beginning to end of each sex act. For more information on condom use see the answer to the question, "Do condoms provide 100% protection from HIV?"