After young Janie was diagnosed as having acute lymphocytic leukemia, her parents could not understand why infection was a major problem for Janie when her WBC count was so high. Provide an explanation for Janie’s parents.

Blood is a specialized connective tissue composed of a liquid intercellular substance known as plasma and a solid part that constitute the formed elements. The formed elements are dispersed through the plasma. They are the erythrocytes, leukocytes and thrombocytes. Leukaemia is the cancer of blood cells that begins in the bone marrow and spreads to the lymphatic system. Leukaemia mainly involves the cancer of white blood cells, a potent infection fighter.