It is possible to transmit rabies after a dog bite. The vast majority of rabies in humans is acquired through dog bites. After a dog bite, the degree of the bite is divided into three exposure levels, of which secondary and tertiary exposures require rabies prophylaxis to be given, primary exposures do not transmit rabies to humans, and a dog bite with broken skin is likely to be a case of secondary exposure. If there is blood oozing from the bite site or if there is more obvious bleeding, it belongs to the third level of exposure and is more likely to transmit rabies. A bite without any redness, swelling, or broken skin can only be judged as a primary exposure and will not transmit rabies. A dog bite with broken skin also requires rabies vaccination to prevent rabies and, if there is oozing blood or bleeding, an anti-rabies serum.