Whether chemotherapy is effective or not has nothing to do with whether the white blood cells are low or not. In addition to killing tumor cells, chemotherapy may also damage normal body cells. Especially the cells that renew faster will be killed more seriously, such as the mucous membrane cells of the digestive tract, hair cells, and white blood cells. Some patients may experience a drop in white blood cells after chemotherapy, and they may experience a significant drop, while others may not. This is mainly related to the chemotherapeutic drugs used and the individual’s physical condition, but has nothing to do with the efficacy of the chemotherapy. Even if chemotherapy does not have any effect on the patient, it is still possible to cause a drop in white blood cells, and even a significant drop.