The immune system helps your body fight infections and other diseases, including cancer, by detecting and destroying abnormal cells that have become cancerous. Sometimes, the cancer cells can hide from the immune system so it doesn’t know where to find them, or your natural immune system might not be strong enough to fight the abnormal cell growth.
Immunotherapy in its various forms can either boost your immune system to help it fight the cancer, or make it easier for your immune system to identify cancer cells and destroy them, or slow their growth.
Immunotherapy can be given in different ways via injection, infusion through the veins or delivered directly into the bladder. Like other forms of treatment, immunotherapy is given over a period of time, often in cycles depending on each individual case.