The difference between acute and chronic leukemia lies in the maturity stage of the leukemia cells. Acute leukemia is characterized by more immature leukemia cells, while chronic leukemia cells tend to be more mature. Acute leukemia is further divided into acute myeloid leukemia and acute lymphoblastic leukemia. Among them, acute myeloid leukemia is subdivided into eight types, from M0 to M7. Chronic leukemia is divided into two main categories: chronic lymphocytic leukemia and chronic myeloid leukemia. As the name suggests, acute leukemia has a rapid onset and a shorter survival period, whereas chronic leukemia develops more slowly and has a longer life expectancy.