There is no vaccine against AIDS. The most important thing to prevent AIDS is to be clean and have regular sexual partners. The main ways of transmission of AIDS are blood transmission, sexual contact transmission and vertical transmission from mother to child, as well as some other ways of transmission, such as sharing injecting needles, irregular tooth extraction, tattooing, pedicure, etc., so we should pay attention to these related lifestyles in our lives. For AIDS patients, if there is an indication for antiretroviral treatment, it is necessary to carry out antiretroviral treatment in a timely manner. After a period of antiretroviral treatment, the number of viruses will gradually decline or even zero, and the patient is very contagious, or even not contagious. So for the prevention of AIDS, the main thing is to treat AIDS patients, and need to cut off the transmission of AIDS.