“ Leukemia is a cancer of the body's blood-forming tissues. The lymphatic system and bone marrow are examples of these tissues. There are various forms of leukemia. There are leukemia types that affect children more frequently. Adults are affected by other forms of leukemia in most situations. Leukemia typically affects the white blood cells. Your white blood cells are very effective at fighting infection-they grow and divide in an orderly way, as your body needs them. This way, in a leukemia patient, the bone marrow produces more faulty white blood cells which cannot work. Leukemia is a cancer of the blood cells. It starts in the bone marrow, which is the soft tissue inside most bones. Their blood cells are produced.“