Immunotherapy is a type of cancer treatment that works by harnessing the power of the immunesystem to recognize and attack cancer cells. Unlike traditional cancer treatments likechemotherapy and radiation therapy, which directly target cancer cells, immunotherapy aims toboost the body's natural defenses against cancer. The immune system is a complex network ofcells, tissues, and organs that work together to protect the body against harmful invaders likeviruses, bacteria, and cancer cells. Normally, the immune system is able to recognize and destroycancer cells as they develop, but sometimes cancer cells can evade detection and continue togrow and spread. Immunotherapy works by stimulating the immune system to recognize andattack cancer cells more effectively.