It is very unlikely that a person would get HIV from a human bite. HIV can only be passed in this manner through direct blood-to-blood contact and not by exchanging saliva. To pass the virus, the infected person would need to have blood in his or her mouth and break the skin of the other person. The break in the skin of the uninfected person could allow infected blood to enter his or her bloodstream. If a person who does not have HIV bites and breaks the skin of a person with HIV, transmission of the virus could only occur if the uninfected person has open sores or cuts in the mouth that allow for blood-to-blood contact.