A kitten bite that has been bleeding for 4 months is a class III exposure and is potentially infectious with rabies, requiring rabies vaccination and rabies passive immunization preparations as soon as possible. The incubation period of rabies is usually within 3 months, but some infected people have an incubation period of more than 10 years. Being bitten by a kitten and bleeding is a class III exposure, and if the kitten has rabies, then there is a risk of contracting rabies. Although it has been 4 months since the bite and bleeding, it is possible that it is still in the incubation period and rabies vaccination and rabies passive immunization preparations are needed as soon as possible to prevent rabies infection. Since rabies has a near 100% mortality rate if infection occurs and the disease develops, rabies vaccination should be administered within 24 hours of exposure, or later if protection is diminished, and selective rabies passive immunization should be administered according to the level of exposure.