Immunotherapy as a treatment for cancer has developed considerably in recent years, proving to be a promising type of treatment against cancer. This therapy consists of the administration of substances produced by the body or through a laboratory, to help the immune system to accurately identify and eliminate neoplastic cells in the patient. The latest research proposes to improve the recognition of tumor antigens and to take advantage of the effector mechanisms of the individual's own immune cells; it also suggests directly stopping cancer cells, since they stimulate the immune system's capacity to recognize them byactivating defense mechanisms that prevent cancer proliferation. However, it remains a challenge to increase effectiveness, specifcity and safety, as this type of treatment is not without limitations and adverse effects. Among the types of immunotherapy currently available ar...