How long does it take for a dog bite to be effective?

If you are bitten by a dog, it is recommended to inject rabies vaccine within 24 hours. The earlier the injection, the better the effect. But it does not mean that it will be ineffective after a certain period of time, or that it will be effective within a certain period of time. It depends on whether the rabies virus in the patient's body has attacked. If the rabies virus in the patient's body attacks within a few hours after being bitten, , then if you have not received rabies vaccine before these hours, rabies vaccine after that will be invalid. If the patient is only scratched by a dog, the injury is not serious, and the patient has not become ill for more than 48 hours, the rabies vaccine will be effective even if it takes more than 48 hours.