Transmission of rabies between humans is extremely rare, although it can happen through transplant surgery, or, even more rarely, through bites or kisses. The rabies virus is present in saliva so it can be transmitted via biting. Transmission by kissing is possible if you erosions or cuts in the mouth are present. There is no data, however, that indicates that the virus is present in the sperm or vaginal secretions... so transmission of rabies through vaginal sex is not possible. There is a very small possibility that you can transmit the virus in cases of oral sex but, as in kissing, fresh cuts on the genitals must be present.