The number of rabies vaccinations that can be given in a year varies depending on the situation. Under normal circumstances, 5 rabies vaccination shots should be given after a dog bite. The 5 rabies vaccination shots are given on the day of the dog bite, and 1 rabies vaccination shot on the 3rd, 7th, 14th and 30th days. The duration of antibodies after rabies vaccination is about 0.5 years. If a dog bite starts with 5 rabies vaccination shots, there is no need to inject rabies vaccine within 0.5 years after the dog bite, and the effect of rabies vaccination gradually decreases within 0.5-1 year. If you are bitten by a dog again within this period of time, you can receive 2 rabies vaccinations, which will also be effective. If you are bitten by a dog again after the first 5 shots of rabies vaccine, you will have to start over and continue with the 5 shots of rabies vaccine in order to develop full immunity and effectively stop the spread of rabies.