AIDS is an infectious disease, and it is mainly transmitted through blood, so if you want to prevent HIV infection, you should block its transmission from the way it is transmitted. For sexual transmission, one of the most effective measures to prevent HIV is to insist on cleanliness, keep a fixed number of sexual partners and use condoms during sex. For blood transmission, you should avoid sharing personal items such as syringes, toothbrushes, razors, shavers, etc. You should also avoid having your teeth pulled, tattoos, eyebrows tattooed, and teeth cleaned in informal medical places outside. In terms of mother-to-child transmission, mothers with HIV should seek professional help for mother-to-child blockage during and after pregnancy to avoid transmitting the virus to their babies.