Whether or not it is okay for a dog to bite someone after being vaccinated depends on the circumstances and cannot be generalized. If a dog is vaccinated against rabies and the vaccine is within its expiration date, it is usually fine for humans. If a dog is vaccinated against infectious diseases such as distemper and microviruses, but not rabies, or if the rabies vaccine is no longer in effect, there is a chance that the patient who is bitten will contract rabies. In addition, the rabies vaccine is to enhance the dog’s ability to prevent and resist this virus, and does not guarantee that it will not carry rabies virus 100% of the time. It is recommended that the bite be promptly treated by a professional physician in an emergency hospital. In addition, if the bite site has broken skin and bleeding, it is recommended to wash it with running water and squeeze out the pus and blood. If the wound is deep, you need to play tetanus antitoxin, follow up to protect the wound and disinfect it regularly to avoid infection by other bacteria.