Clinically there is usually no need for rabies vaccination if you are bitten by a dog one year later, or there is little significance to rabies vaccination one year after being bitten by a dog. Because rabies as a very serious infectious disease, usually after being bitten by a rabid dog, cat or coyote, because the animal carries the rabies virus and infects the human body with the rabies virus, generally rabies virus currently has no cure once the attack rabies, the end result is usually the death of the patient. Rabies prevention is far more important than treatment, rabies virus incubation period in humans is generally in three months, usually after being bitten by a rabid dog is usually vaccinated with rabies vaccine 24-48 hours to receive the active vaccine, if more than 48 hours later to add rabies virus immunoglobulin. So more than a year despite occasional rabies virus infection, but theoretically has exceeded the incubation period of rabies virus, the actual significance is not much, generally do not need to inject.