treatment or prevention of disease (such as an autoimmune disorder, allergy, or cancer) that involves the stimulation, enhancement, suppression, or desensitization of the immune system
immunotherapy
noun(im-mu-no-ther-a-py)
the transfer of immune cells with antitumor activity into a patient to mediate tumor regression; especially : treatment typically for cancer in which lymphocytes removed from a patient are cultured with interleukin-2 and are returned to the patient's body