You can’t get AIDS from swimming in a public pool. AIDS is caused by the human immunodeficiency virus HIV infection. HIV is weak against the outside world and disinfectants can inactivate HIV, so it is not transmitted in public swimming pools. HIV is mainly transmitted through sexual contact, blood transmission and mother-to-child transmission. Sexual contact transmission includes sexual contact between people of the same sex and people of the opposite sex, and blood transmission refers to blood transfusion or importation of blood products. If you are contaminated with HIV, you are vulnerable to HIV infection. Sharing syringes with intravenous drug addicts or being pricked by HIV-contaminated needles can lead to HIV infection, which has a 0.3% chance of occurring.