Immunotherapy is a type of cancer treatment that helps your immune system fight cancer. The immune system helps your body fight infections and other diseases. It is made up of white blood cells and organs and tissues of the lymph system. Immunotherapy is a type of biological therapy because it uses substances made from living organisms to treat cancer. Certain types of immunotherapy help the immune system in destroying cancerous cells while others combine with immune cells to assist them in killing cancerous cells.
