Wearing a condom when having sex with an AIDS patient can reduce the spread of AIDS to a very large extent, but it does not completely guarantee that transmission will not occur. This is because condoms may not be worn the whole time, and a small break in the condom may also lead to a failure of prevention. The body fluids of an AIDS patient contain a lot of HIV’s, mainly semen or vaginal secretions. If another person comes into contact with HIV because the condom is not worn properly, or because there is a small break in the middle, this will come into contact with his or her own mucous membranes. In this case, there is a tiny possibility of transmitting HIV.