It has been 20 days since the dog scratched the dog without any injections

First, it has been 20 days since the dog scratched the dog without any injections. If the dog has been alive and healthy, the possibility of infection can be ruled out and it is basically safe. It complies with the ten-day observation method, because animals can only be infected when they bite people when they are sick, and once rabies develops, most people will die within a week or so. Those who have survived for more than ten days can basically be judged not to be infected with rabies and will not be transmitted to humans, so you can rest assured.