Intact skin exposed to saliva is not contagious; broken skin or wounds exposed to saliva are contagious. Normal contact with and feeding of animals and licking of intact skin are classified as Class I exposures and do not require rabies vaccination or immunoglobulin, i.e., they do not transmit rabies. If a broken skin wound is licked by a dog, it is a Class III exposure (severe) and can transmit rabies. After the wound has been treated and prior to vaccination, an injection of an anti-rabies passive immunization agent, rabies immune globulin, is also required around the wound. Rabies is one of the oldest and most feared human infections, with the highest morbidity and mortality of all infectious diseases. Whether rabies can be transmitted depends on factors such as the location of the rabies virus entry point and the rabies virus load, and is also specifically analyzed in relation to the level of exposure. It is recommended that domesticated dogs be vaccinated regularly. In case of unfortunate bites, scratches, etc., they should go to the hospital promptly for medical consultation, so that a professional doctor can determine whether they can be infected with rabies or not to avoid delays in their condition.