Naive granulocytes are granulocytes that have not yet fully matured, and include three types of granulocytes: early, intermediate and late granulocytes. High absolute values of naive granulocytes are common in two situations: In the first case, when the body has a serious infection, especially a serious bacterial infection, mature neutrophils in the peripheral blood are attracted to the site of inflammation to destroy the invading bacteria. At the same time, some immature granulocytes in the bone marrow will be released to replenish the mature granulocytes in the peripheral blood, and a high absolute value of naïve granulocytes will occur. In the second case, when acute granulocytic leukemia or chronic granulocytic leukemia occurs in the body, the leukemic cells proliferate in the bone marrow and are released into the peripheral blood, resulting in a significant increase in the number of naïve granulocytes in the peripheral blood.