After being scratched by an animal, it is recommended that the first rabies vaccination be started within 24 hours. The rabies vaccine is not just one injection, most require five injections. Some can also use the four-shot method. For the first injection of the four-shot method, one shot is given in the deltoid muscle of the left and right upper arms, which means that two shots are given for the first time. The reason why it is recommended to give the first injection within 24 hours after being scratched by an animal is that the majority of people can go to the nearest vaccination station after such a long period of time. If the nearest vaccination station takes 2-3 days to arrive, it is recommended to go to the station as soon as possible. 2-3 days after the first injection of rabies vaccine can also play a role in preventing rabies, although there is a very small possibility that rabies will not be prevented, but in most cases it can be. Because the incubation period of rabies is greater than one month, after the injection of anti-rabies vaccine, it will produce antibodies only in the next 1-2 weeks, 2-3 days after the late injection, the rabies vaccine will produce the effect time, 1-2 more weeks after the bite to produce the effect, and not more than three weeks.