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The immune system contains a number of cell types, such as [[NK cells]] and [[cytotoxic T cell|killer T cells]] that have the capability to destroy other cells that have become infected with viruses or have become cancerous. [[Immunotherapy]] involves the enhancement or potentiation of these natural defenses against tumor cells. This is useful because some cancer cells may have mutations that make it hard for the immune system to recognize them as abnormal. A common procedure is to remove immature immune cells from the patient's [[bone marrow]], purify the T-cells and expose them to [[antigen]]s from the tumor. The activated cells are then re-injected, allowing them to seek out cancerous tissues.
The immune system contains a number of cell types, such as [[NK cells]] and [[cytotoxic T cell|killer T cells]] that have the capability to destroy other cells that have become infected with viruses or have become cancerous. [[Immunotherapy]] involves the enhancement or potentiation of these natural defenses against tumor cells. This is useful because some cancer cells may have mutations that make it hard for the immune system to recognize them as abnormal. A common procedure is to remove immature immune cells from the patient's [[bone marrow]], purify the T-cells and expose them to [[antigen]]s from the tumor. The activated cells are then re-injected, allowing them to seek out cancerous tissues.
==Alternative==
===Alternative===
Clearly the most controversial type of treatment involves the use of alternative medicine. Sometimes this is done at the same time as conventional treatments, but natural doctors strongly discourage this practice, since it is rarely effective. Alternative treatments rely heavily on the immune system, which is usually harmed by conventional treatment. With a healthy immune system, the following are sometimes used:
Clearly the most controversial type of treatment involves the use of alternative medicine. Sometimes this is done at the same time as conventional treatments, but natural doctors strongly discourage this practice, since it is rarely effective. Alternative treatments rely heavily on the immune system, which is usually harmed by conventional treatment. With a healthy immune system, the following are sometimes used:
*[[Essiac tea]]
*[[Essiac tea]]