Special cells are leading the next generation of cancer treatment. The human immune system is made up of special cells, chemicals and organs that fight infection, which are also known as microbes. It includes white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus and bone marrow. These all work together to fight infection. The immune system also functions to ward off foreign or altered cells that may become cancerous. Sometimes mechanisms of the immune system ...