New modality for treatment against cancer is Immunotherapy! Immunotherapy is new class of anticancer drugs that work by restoring body's own immune system to recognize and kill cancer cells, which otherwise change the protein expression of body in such a way that immune cells consider them to be one's own. What are various types of cancer immunotherapy? 1)Monoclonal antibodies: Antibodies as we know are proteins made by the body to fight against infection. Monoclonal antibodies are manufactured in lab and made to target very specific tumor protein and thus help in killing them. eg Rituximab 2)Immune checkpoint inhibitors are antibodies that bind to proteins on cancer cells or immune cells , this makes recognition of cancer cells by T cells possible. eg nivolumab, pembriolizumab.