Saliva is currently not considered to be capable of transmitting HIV, so no amount of saliva, no matter how much, will result in HIV transmission. The amount of HIV in saliva is very small, but not much information has been seen to describe exactly how much HIV is in saliva. According to the 17th edition of Nielsen Pediatrics, if there are HIV infected particles in saliva, the corresponding number of infected particles in 1 ml of saliva is usually less than 1, so the corresponding concentration is very low. Although saliva from AIDS patients can stain other people’s wounds and can contain HIV, the amount of this HIV is so small that it is difficult to cause infection. There are no confirmed cases of HIV transmission through saliva in the actual clinical process, so no amount of saliva can cause the transmission of HIV.