Saliva can be infected with AIDS because although the saliva in the body of an AIDS patient contains a small amount of the virus, if it touches broken skin or mucous membranes, there is a certain chance of spreading the virus. HIV can be transmitted through sexual contact, blood, and mother-to-child transmission. Sexual contact is the most important way of transmission of AIDS, although there is no obvious skin and mucous membrane damage during sexual intercourse, when sexual contact friction can produce a slight damage, which can allow HIV to invade the healthy organism, so that the organism is infected with the virus and develops. If you have had sexual contact with AIDS patients, you should seek medical examination without delay to avoid delay. Take care of your rest, quit smoking and drinking, and keep a regular routine.