People at high risk for AIDS mainly include medical personnel, frequent blood transfusions, multiple sexual partners, and gay men. According to the transmission route and conditions of AIDS, the basic classification of people at high risk of AIDS can be made: I. Blood contact: 1. Those who have frequent blood transfusion or transfusion of blood products due to illness; 2. Medical personnel who have contact with blood and body fluids that have not been tested for HIV antibodies; 3. Testers who often do blood and various secretions for AIDS patients; 4. Those who have used public sharp instruments without strict sterilization for tattooing, eyebrow tattoo, eyeliner The person who has tattooed, tattooed lip line, pierced ears or razor face, pedicure. Sexual contact: People who have sex, multiple partners, homosexuals or bisexuals, or spouses or partners of AIDS patients are at higher risk of HIV infection. Mother-to-child transmission: Children born to pregnant women infected with HIV have a higher risk of contracting AIDS. In addition, if a woman is infected with HIV while breastfeeding, she may also transmit the virus to her baby through breast milk.