What is Leukemia?

Leukemia usually involves the white blood cells. Your white blood cells are potent infection fighters — they normally grow and divide in an orderly way, as your body needs them. But in people with leukemia, the bone marrow produces an excessive amount of abnormal white blood cells, which don't function properly.

This video consists of topics are as follow
types of leukemia
symptoms
causes and risk
treatment of leukemia