AIDS is mainly caused by the infection and spread of HIV. HIV virus enters the human body and destroys CD4+ T cells in the body, resulting in impaired immune function, so patients at the end stage of AIDS are often susceptible to viral and bacterial infectious diseases. There are three main ways of transmission of AIDS: blood transmission, sexual intercourse transmission and mother-to-child transmission. According to these main transmission routes, effective measures can be taken to prevent the spread of AIDS: 1. Blood transmission: HIV virus is present in the blood of AIDS patients, so after contact with the blood of AIDS patients, you may be infected with AIDS. In daily life, you should try to avoid sharing household items that can easily cause blood contact with others, such as razors, combs, toothbrushes, etc.; 2. Sexual intercourse transmission: It is recommended to use condoms throughout the process of sexual intercourse to avoid direct contact between sexual organs and body fluids. Before cohabitation or marriage, it is recommended that both parties undergo a detailed physical examination; 3. Mother-to-child transmission: If a female HIV carrier transmits HIV carried by herself to the fetus or newborn during delivery and breastfeeding. Therefore, it is medically advocated that women who are preparing for pregnancy or in the pre-pregnancy period should undergo a detailed physical examination and consider whether to conceive or whether to end the pregnancy if they are confirmed to be HIV carriers. HIV is not curable and anti-viral drugs are usually used clinically to improve the quality of life of patients. There are no drugs or medical treatments available on the market that can completely cure AIDS, so curbing the spread of HIV should be of wide concern and importance to the community.