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Immunotherapy is sometimes referred to as either biotherapy or biological therapy. Immunotherapy uses the body’s own immune system to fight cancer cells. It is also used to help control side effects from other cancer treatments.
The immune system is a network of organs and cells that work to protect the body against disease. The immune system looks for cells that are not normal, such as bacteria, viruses, and cancer cells, and tries to destroy them.
During immunotherapy, patients are given substances called biological response modifiers (BRMs). These BRMs are substances that the body normally creates to fight cancer and other diseases. BRMs enhance the body’s natural ability to fight disease and boost the body’s power to recognize and destroy cancer cells. BRMs can also change the way the body reacts to a tumor.
There are two primary ways that BRMs work in immunotherapy:
Active Immunotherapies - Stimulating the body’s natural immune system responses to work harder and more efficiently and
Passive Immunotherapies - Giving substances, such as man-made proteins, to supplement a patient’s immune system to help it work more effectively.
Immunotherapy is most often given in addition to other cancer treatments such as chemotherapy. Treatments are generally injected into a vein through an IV, but there are also pills and shots that can be given at home.
The side effects depend upon the type of treatment performed. It is common for patients treated with immunotherapy to get flu-like symptoms. Side effects generally go away at the end of treatment.