Is the injection still effective 20 days after being bitten by a dog

Rabies vaccine must be injected in time after being bitten by a dog. Rabies vaccine injection is divided into pre-exposure injection and post-exposure injection. Pre-exposure injection is mainly for people at risk of infection, such as veterinarians and rabies research personnel. Post-exposure injection is mainly for rabies vaccine injection after being bitten. Rabies vaccine injection is injected on 0 days, that is, on the same day, 3 days, 7 days, 14 days and 28 days after being bitten. A total of five rabies vaccines are injected. In theory, the earlier the injection effect, the better, but if the dog has been bitten for several days or months, due to various reasons has not been injected, as long as you can get rabies vaccine, should also be injected in time, and strive to make the vaccine work before the onset, at this time the dose of injection should be doubled.