Rabid humans, affects humans in animal bite that causes rabies virus in a serious inflammation, once the virus is established to the brain, there is no treatment.[1]
The rabies encephalitis that affects the brain and it travel in the central nervous system into spinal cord and in other parts of the body, The patient shows develops final symptoms such as excessive salivation, aggression and delirium.[2]
The human saliva is rare carry rabies, the rabies is most severe by animal saliva rather than humans. There is no record to human bite to human transmission.
From animal bites.