HIV is the Human Immunodeficiency Virus, and the way of HIV infection is the way of HIV transmission, including sexual transmission, blood transmission, mother-to-child transmission, etc. 1. 1. Sexual transmission: Sexual transmission is the most important way of HIV infection, including unsafe sex, multiple sexual partners, etc. A large amount of HIV virus exists in the semen and vaginal secretions of HIV-infected patients and AIDS patients, and when they have unprotected sex with HIV-infected patients, the HIV virus may enter into the mucus membranes and cause infections through the sex. 2. Blood transmission: HIV virus is also present in the blood of HIV-infected people or AIDS patients, such as sharing syringes or coming into contact with the blood of infected people and their blood products, which can also cause HIV infection. 3. Mother-to-child transmission: Babies can be infected with HIV in the womb, during delivery by the mother, and during breastfeeding. For HIV-infected people, they should seek medical treatment as soon as possible and take antiretroviral therapy in order to maximize the suppression of viral replication in the body and avoid the development of AIDS.