Two people who do not have AIDS cannot get AIDS by having sex. AIDS is caused by HIV, the human immunodeficiency virus, and two people who do not have AIDS cannot get AIDS on their own. HIV is mainly found in blood, semen, vaginal secretions, chest and abdominal fluids, cerebrospinal fluid and breast milk. Therefore, it is important to eliminate high-risk sexual behavior, to avoid going to irregular medical institutions for invasive operations on the body, and to strictly avoid drug use, so that AIDS can be effectively avoided.