HIV is an infectious disease caused by the HIV virus, which attacks the body’s immune system and destroys a large number of CD4+ T lymphocytes in the body, leading to a decline in immune function and a variety of viral or bacterial infections. Although HIV cannot be completely cured, it can be prevented as well as treated, and in patients with better control, it can even not affect life expectancy and quality of life. Prevention: AIDS is mainly transmitted through sexual transmission, mother-to-child transmission and blood transmission. Therefore, the following methods can be used to prevent the occurrence of AIDS: 1. Do not share disposable syringes during transfusion and blood extraction, and do not share dental tools or razors or other household utensils that may cause blood contact; 3. Treatment: At present, there is no drug or method that can completely remove the HIV virus from the body of AIDS patients, but the virus can be suppressed to the extent that it is basically undetectable through antiviral therapy, which can improve the prognosis of patients and make the CD4+ T-cells close to normal values. However, when using antiviral treatment for HIV, long-term treatment is required and should not be discontinued because once discontinued, it may cause a rebound of the disease. During the course of treatment, care should be taken to monitor the adverse effects of the drugs.