Rabies vaccine does not usually cause leukemia. Rabies vaccine is a biological agent that can help the organism prevent rabies, and individuals who have been bitten or scratched by animals suspected of having the disease can maintain their health and prevent themselves from being harmed by rabies due to the violation of the rabies virus by receiving rabies vaccine in a timely manner. Leukemia is a kind of malignant tumor of blood system, which is caused by abnormal differentiation and proliferation of hematopoietic cells. For the time being, the cause of leukemia is not clear. However, there is no scientific evidence linking rabies vaccination to the development of leukemia. Therefore, the use of rabies vaccine generally does not cause leukemia, and individuals should not be unnecessarily concerned. For the sake of personal health, individuals need to recognize the importance of timely rabies vaccination. It is also important to be aware of leukemia and to seek medical attention for any abnormalities.