In leukemia, the blood forming tissues flood the bloodstream and lymph system with immature white blood cells. The immature cells cannot fight infections. They reduce the production of normal red blood cells and tiny discs called platelets. Leukemia is divided into two categories, acute and chronic. Acute affects immature white blood cells, progresses rapidly, and is most is often seen in children.
Chronic leukemia occurs most frequently in adults and progresses slowly.
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