Rabies is a serious disease caused by a virus. Rabies is mainly a disease of animals. Humans get rabies when they are bitten by an infected animal. There may be no symptoms at first, but weeks or even years after a bite from an infected animal, rabies can cause pain, fatigue, headaches, irritability, fever, seizures, hallucinations, and paralysis. Rabies can be fatal. You are more likely to be exposed to the rabies virus if you are a veterinarian, animal handler, rabies laboratory worker, or may otherwise come into contact with animals that could possibly carry the virus (including cats, dogs, foxes, skunks, raccoons, bobcats, coyotes, and bats). Travel to certain countries may also increase your risk of exposure to rabies. Rabies human diploid cell vaccine is used to prevent rabies in people who have been bitten by an animal (post-exposure) or otherwise may be exposed to the rabies virus (pre-exposure). Like any vaccine, the rabies vaccine may not provide protection from disease in every person.