Cancer immunotherapy is a treatment that helps the body's own immune system find and attack cancer cells. By recruiting the immune cells, it is fundamentally different from conventional therapy such as chemotherapy drugs that directly try to kill cancer cells.

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Immunotherapy is revolutionizing cancer treatment for human patients. Several new immunotherapy treatments have brought unprecedented long-term remission to patients with melanoma and certain blood cancers. Researchers are exploring ways to make immunotherapy effective for other cancer types.