Leukemia is group of cancer cells that originate in leukocytes or the WBC  that originate in bone marrow. WBC helps in fighting diseases. A disturbance in normal WBC production causes multiplication of immature or damaged WBCs resulting in cancer.

In children lifestyle does not play much role or influence cancer development. Mother drinking during pregnancy increases risk of baby having cancer.

Study shows that cancer in childhood  is rare, and the rate at which new cases develop among children (incidence) is 15.3 per 100,000 per year