== Introductory sentences == 

 Cancer Immunotherapy is the use of the immune system to reject cancer. The main premise is stimulating the patient's immune system to attack the malignant tumor cells that are responsible for the disease. 

 This is an incorrect generalisation, and as such should not be part of the opening paragraph. Whilst immune stimulation is a strategy, this is emphatically not the technique used by most of the commercial monoclonals used today eg the tyrosine kinase inhibitors such as Herceptin, Cetuximab, which interfere with the EGFR family. Nor is it the mode of action of the radioconjugates such as Zevalin, or Bexxar.