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Biological reason why it is almost imposible for a man to get infected from a woman?
Oct 28, 2001

What is the biological reason why less man get infected with HIV from woman?

Response from Dr. Aberg

Much of this depends on the type of sexual activity. The vaginal mucosa is a better barrier than the rectal mucosa. Men frequently transmit HIV and other STD's to each other via rectal intercourse. The rectal mucosa is relatively thin, bleeds easily and organisms can penetrate into the bloodstream easier than through the vaginal mucosa or through the penis at the urethra. Women are at increased risk of acquiring HIV when they are having their menses. It is also the time that they are more likely to transmit HIV to a male partner especially if a male has an open sore on his penis.

So, in other words, a male with an intact surface on his penis who has contact with the genital secretions of a woman has less chance of acquiring HIV than a man who has ulcerations or abrasions on his penis from either trauma or STD's. And is less risk than if he was anal receptive.

Having said all that, there are other factors which play a role in transmission including the quantity of HIV in the genital secretions, host immune factors, duration of contact and frquency of contact. I would advise you not to take the risk and use condoms at all times to protect yourself.

cleared but still worried

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