If there is a possibility of rabies after being scratched by a cat, a rabies vaccination is required, and the earlier the better, the prescribed time is within 24 hours. This is because within 24 hours the patient has enough time to get the rabies vaccine at a relatively close location. If this time is exceeded, the vaccine can be given as long as it is within the incubation period of rabies, and it may be possible to achieve the goal of stopping a rabies attack. The incubation period for rabies is 1-3 months, so it is still recommended to get a rabies vaccination within 1 month. If the vaccine has not been given by 3 months, the probability of getting rabies at that point is greatly reduced and the rabies vaccination is likely to be less useful. It is not generally too recommended to get the vaccination after 3 months, but it is still possible that the vaccination will have a preventive effect against rabies. The maximum incubation period for rabies is no more than 1 year, so if it reaches 1 year, it is not recommended to get the rabies vaccine again.