The main routes of HIV transmission are sexual transmission, blood transmission, and vertical transmission from mother to child. The most important way of HIV transmission in China is sexual transmission, which has accounted for more than 90% of new infections. So to prevent the spread of HIV, do the following: first, clean yourself, do not have sex with strangers; second, fixed sexual partners, abstain from sexual promiscuity, the correct use of condoms; third, avoid intravenous drug use, sharing syringes with others; fourth, avoid the use of non-formal sterilized utensils, mosquito eyebrows, tattoos, etc.; fifth, HIV-infected mothers should actively antiviral treatment to avoid the Virus transmission to the fetus.