Chasing the Invisible: Besides having seven heads, the beast has another trick. It can go invisible.

Your own body is very capable of self healing. But this nasty beast puts up the force field, and the force field makes the tumor invisible to the body.

To change the shape of the survival curve, you have to do something differently.

New drugs can block the force field, so we can see and eliminate tumors that were once invisible. If we can detect these tumors by immunohistochemistry, we can treat the patient with immunotherapy.