Every cancer has its own molecular profile. There are many different sub-types just in lung cancer. They all hijack the immune system, tricking your body into believe they are not there. If we can teach your immune system to outsmart cancer by realizing that these cells in your body need to be killed, and if we can mobilize our immune system, then we have a completely new shot at treating cancer. The flip side of this hypothesis is, why would you give yourself chemotherapy at the highest doses, which wipes out the immune system? That’s what we’ve been doing for 40 years. I’m not saying you shouldn’t give yourself chemotherapy at all—but why would you give yourself such a high dose that you actually wipe out whatever protective mechanisms that you already have?
Source: How to Cure Cancer