1, to be clean, avoid premarital sex, resolutely resist prostitution, prostitution and other illegal activities. 2, to refuse drugs, drug use is illegal, sharing syringes to inject drugs is easy to infect HIV. 3, do not through informal clinics for injections, infusions, to see a doctor need to go to a regular hospital, to choose disposable needles and strictly sterilized medical equipment. In addition, do not go to informal cosmetic surgery institutions to do tattoos, ear piercing and other plastic surgery, do not share toothbrushes, razors and other personal items with others.