Do I need a shot if scratched by a cat without broken skin but with a red mark?

Here, "getting an injection" usually refers to receiving a rabies vaccine. Generally, if a cat scratches the skin without breaking it and only leaves a red mark, there is no need for a rabies vaccination. However, if any discomfort or symptoms develop, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. The detailed analysis is as follows:

The rabies virus is primarily transmitted through an animal's saliva. If the skin is not broken, the virus typically cannot enter the body. Therefore, in most cases, if there is only a red mark without any skin breakage, thoroughly washing the scratch with soap and water followed by rinsing with clean water, and then applying iodine tincture or another suitable disinfectant to the area, can further reduce the risk of infection.

If there is uncertainty about whether the skin is completely intact or if there are tiny abrasions, caution should be exercised. Additionally, if the cat involved is a stray or its health status is unknown, considering the potential risk of rabies or other diseases, it is advisable to consult a doctor to determine whether vaccination is necessary.