Whether or not a dog bite should be prevented by an injection depends on the condition of the wound at the site of the bite. If the skin is not broken and bacteria have not entered the body, the shot can be dispensed with. If the skin is broken, whether or not bleeding, it is recommended that the wound be treated promptly and that the entire rabies vaccination be administered. Dogs may carry rabies virus, and once bitten by a dog, the death rate is close to 100 percent. If the skin has been broken and there is a possibility of the virus entering the body, the bite site should be disinfected immediately by first washing the bite site thoroughly with soapy water and then disinfecting it thoroughly with a disinfectant solution, followed by a full rabies vaccination. For rabies vaccination, the country currently has a four-dose, five-dose program, and the choice varies from region to region. However, as long as the vaccinations are administered on time, the effects are guaranteed. If the wound is deep, a tetanus vaccination is also recommended. Because the dog mouth bacteria are many, especially tetanus this bacteria once into the body, serious may destroy the nervous system, and eventually lead to death.