It is generally not necessary to get an injection if the skin is scratched by a one-month-old puppy, because the transmission route of rabies virus is blood and saliva, that is, bites, so if there is no bleeding from the scratch, you will not be infected with rabies virus. Moreover, puppies raised at home rarely carry rabies virus, so don’t worry. You only need to wash the wound repeatedly with soap and water, and then apply iodine for disinfection.