What can immunotherapy treat?

Immunotherapy. Can be use for autoimmune conditions and hypogammaglonulinemia.
Cancer. Recently several drugs have been approved in the immunotherapy of cancer. These drugs are designed to stimulate the body's immune system to recognize and fight the cancer.
The beauty of... immunotherapy is that you can structurally design a molecule to specifically target the "enemy" component of a disease, in order to redirect & harness your own body's protective mechanisms to attack & destroy it. Alternatively, you can flood your system with protein complexes that will bind up a harmful molecule in a lock & key manner & neutralize it. Very open-ended answer given huge potential. .