Biologic Response Modifiers are substances that help the immune system fight diseases, particularly cancer and autoimmune disorders. They work by enhancing the body's natural defenses or by targeting specific components of the immune system. These modifiers can include proteins, antibodies, and other molecules that influence how the immune system responds to threats. Common types of Biologic Response Modifiers include monoclonal antibodies, cytokines, and vaccines. They can be used alone or in combination with other treatments, such as chemotherapy or radiation therapy, to improve patient outcomes. By modifying the biological response, these therapies aim to increase the effectiveness of the immune response against diseases.