You need to be vaccinated against rabies within 24 hours after being scratched by a cat because cats may carry the rabies virus, and rabies vaccination is effective in preventing rabies. The rabies virus is usually found in the mouth and nails of animals such as cats or dogs. If you are scratched or bitten by a cat, you should get a rabies vaccination as soon as possible. If you are scratched or bitten by an animal and do not receive the vaccine within 24 hours, you should not give up the vaccination. The incubation period of rabies is usually 1~3 months, so as long as you receive the vaccine before the onset of rabies, you can effectively avoid rabies attacks. There is no cure for rabies, and the mortality rate of rabies is 100%. After being scratched or bitten by a cat, rabies vaccine should be injected in time to avoid rabies attacks.