Odds of hiv through unprotected sex. Contribution of sexually transmitted infections to the sexual transmission of HIV.

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Put the condom on after the penis is hard and before the penis touches the vagina or anus.

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A combined analysis of all studies of HIV-transmission risk undertaken to date in high-income countries has found that unprotected vaginal intercourse with an HIV-positive man who is chronically infected and not on antiretroviral treatment ART carries an estimated 0.

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There is a higher risk of passing HIV on to others in the first few months after infection as there are high levels of the virus in bodily fluids at this point.

Having a 1 in 70 chance of transmitting HIV does not mean it takes 70 exposures to the virus in order to seroconvert.

Women are thought to be at a greater risk than men of acquiring HIV during vaginal intercourse for the following reasons:

HIV transmission.

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