therapy – n. the treatment of physical or mental disorders

immune system – noun phrase  the body's natural defenses for fighting disease

leukemia – n. a serious disease in which the body forms too many white blood cells

remission – n. a period of time during a serious infection when the patient's health improves

conventional – adj. of a kind that has been around for a long time and is considered to be usual

marrow – n.  a soft substance that fills the bones of people and animals

immunotherapy – n.  a treatment that uses your body’s own natural defenses to help fight cancer (source: www.cancer.org)
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