Whether a person needs an injection after a human bite depends on the circumstances. Human bites generally do not require a rabies virus vaccine, but some antibacterial medication is required. Rabies virus is mainly carried in the body of rodents, and people are generally not infected. However, our mouth contains a large number of bacteria and viruses, which can easily lead to wound infection, so you need to inject some antibacterial drugs and do a good wound debridement. If the wound is shallow, first rinse it with flowing clean water, then wipe it with iodine volts to disinfect it, no need to dress it with gauze. If the bite is more serious and the bite is deeper, after cleaning and disinfecting by themselves, the injured person should go to the hospital in time to let the professional doctor help to deal with it, and may need to inject tetanus antitoxin. Bacterial content in the mouth is high, if the bite should be treated promptly, although rabies vaccination is not required, but the wound, if deeper, requires injection of tetanus antitoxin to avoid anaerobic bacterial infection.