Cancer immunotherapy uses ones own immune system to help it fight cancer. Basically in this therapy the immune system is made to recognize and then to attack and destroy the tumor cells that cause the disease. This is can be achieved in two ways either by immunization where in the immune system is trained or by administrating therapeutic antibody where the antibodies are recruited to the immune system for destroying the tumor cells.

Basically cancer immunotherapy is a diversified set of therapeutic strategies devised to help our own immune system to fight against the tumor. Since our immune system is so complex and so effective that once trained many types of tumor cells are destroyed by our own immune system itself. Intravesical BCG immunotherapy is one of the modern methods of producing an immune response against cancer tumor for superficial bladder cancer.

There is an extensive research currently going on for creating vaccines to produce a specific immune response against tumors. Example Sipuleucel-T, it is something like a vaccine which strategizes in loading ‘prostatic acid phosphatase’ peptides in dendritic cells of the patient, so as to generate a specific immune response against prostate cancer cells.