AIDS is not normally transmitted by kissing. The main modes of transmission are sexual, blood-borne and mother-to-child transmission. Kissing alone is not an easy way to get infected because saliva does not contain the HIV virus. HIV is mainly found in human blood, semen and female cervical secretions. To prevent HIV, there is no effective vaccine for HIV, but to prevent HIV you need to do the following: firstly, you need to adhere to cleanliness, refrain from prostitution and prostitution, and avoid premarital and extramarital sex. Fifth, the use of condoms is one of the most effective measures to prevent sexually transmitted diseases and AIDS; sixth, avoid direct contact with the blood, semen, breast milk and urine of AIDS patients to cut off other means of transmission.