After leukemia patients have fully recovered, if their blood picture is stable and they are in good physical condition, they are usually allowed to receive the New Crown vaccine, and it is recommended that they consult a hematologist before vaccination. Leukemia is a type of malignant clonal disease of hematopoietic stem cells, and fever, bleeding and infection are its common symptoms. Some of the leukemia can be cured. Currently, the common treatment methods include chemotherapy, radiation therapy, targeted therapy, stem cell transplantation and so on. The prognosis of leukemia is good and many patients can be cured or stabilized in the long term through reasonable treatment interventions. Leukemia patients who have fully recovered, with normal blood counts and in good physical condition, are usually eligible for vaccination, but it is not recommended for leukemia patients during the period of illness or acute exacerbation of the disease. However, it is not recommended for leukemia patients to receive the vaccine during their illness or acute exacerbation of the disease.