Vaccinations are not associated with leukemia. Moreover, vaccination is beneficial in preventing some infectious diseases. 1. Vaccination is mainly made from pathogenic microorganisms, such as bacteria and viruses, and their metabolites, through artificial attenuation, inactivation or the use of genetic modification, etc. After entering the human body, it stimulates the human immune system and produces the corresponding antibodies, which can recognize and prevent the corresponding diseases, and it has no effect on the blood system. 2. The causes of leukemia are complicated, and may be related to genetic factors and acquired exposure to harmful substances. For example, prolonged exposure to radiation and prolonged exposure to pollutants such as benzene can also increase the chance of leukemia. Also, certain viral infections can cause leukemia. Vaccination does not cause leukemia, but vaccination is not recommended for leukemia because the immune system of leukemia patients is in a state of disorder. If you have leukemia, go to the hospital for treatment.