When scratched by a cat, it depends on whether there is bleeding from the scratch wound; if there is no bleeding, it is considered a second-degree exposure, and if there is bleeding, it is considered a third-degree exposure. In order to prevent rabies, in the case of secondary exposure, only the rabies vaccine is needed, which is capable of producing the appropriate antibodies after 1-2 weeks, thus creating immunity. If there is bleeding, the rabies incubation period may be advanced, in which case, in addition to the rabies vaccine, rabies immunoglobulin or rabies serum should be injected, which is passive immunization, directly providing the appropriate antibodies to the human blood circulation, thus advancing the time of immunization against rabies. If you have been scratched by a cat and there is no obvious wound that is particularly deep, and you do not need to worry about anaerobic infection at the wound site, then you do not need to worry about tetanus.