The probability of contracting HIV through transfusion of HIV-containing blood is high, greater than 90%, followed by the probability of contracting HIV when the skin is broken, and the probability of contracting HIV when the skin is not broken is low. 1. The main ways of transmission of AIDS include sexual transmission, blood transmission, mother-to-child transmission, etc. Blood transmission is one of the main ways, so the probability of being infected by transfusion of HIV-containing blood or blood products is very high. 2. If a person touches the blood of an AIDS patient when there is a break in the skin, HIV can also be transmitted through contact with the broken area, and the probability of infection is higher than that of direct blood transfusion, although it is not as high as that of direct blood transfusion. 3. If you come into contact with HIV-containing blood without skin damage, the skin is an important protective barrier, and the probability of HIV infection will be lower. If you come into contact with HIV-containing blood, it is recommended that you consult a regular hospital in a timely manner to complete the relevant examinations to ascertain whether you are infected with HIV.