The incubation period for rabies generally ranges from one to three months, rarely exceeding one year, with the shortest onset at five days and the longest around six years. Actually, the duration of the incubation period is related to the location of the bite; the further from the head, the longer the incubation period. If the wound from the bite is superficial and contains fewer rabies viruses, then the incubation period will also be longer. Conversely, if there is a larger amount of rabies virus and the wound is deeper, the incubation period will be shorter. Rabies is a fatal disease, with a 100% mortality rate once infected.