Is there a high risk of HIV if the penis of an infected man enters the vagina just a few centimeters in front?

Answer

The HIV virus can be transmitted through unprotected sexual contact. Such insights have come from surveys of recently infected individuals and have little basis on direct experimental evidence. Risk analysis of very specific situations (duration, humidity) is virtually impossible because this is not questioned or measured in a standardized manner.

It is known that in the case of unprotected male/female sexual contact where one of them is a carrier of the virus but there are no other venereal diseases or inflammation of the genitals present, the chance of transmission of the virus is usually less than 1%. It should be noted right away that there are individual differences, and that the chance increases very strongly if, for example, there has been or has been a herpes infection. A single penetration can therefore be accompanied by transmission of the virus, but this will not occur in most cases. Given these uncertainties, the only sensible thing to do is to always use condom protection with a possibly infected partner. If there is a single penetration without a condom with a known infected person, consultation of the general practitioner is desirable for follow-up. If the partner is unknown about his/her HIV status, this seems less necessary, but remains useful for reassurance and future prevention.