If you are bitten by a puppy and the skin is not broken, you do not need an injection, because if the skin is not broken, you will not be infected with rabies. You only need to clean the bite area. Puppies have sharp teeth, so you should pay more attention when playing with dogs to avoid being bitten. If you are accidentally bitten, you need to clean the wound immediately and go to the hospital for rabies vaccination to avoid infection.