Probability of AIDS infection

AIDS can be transmitted mainly through sexual intercourse, blood, mother-to-child and other ways, the probability of transmission is different in different ways. Generally speaking, the highest risk is the use of AIDS patients 'blood, the probability of transmission is about 50%. The probability of transmission between unprotected sexual intercourse between the same sex is about 2%, and between the opposite sex is about 1%. The probability of mother-to-child transmission is about 25%.