Not true. And not necessary. The body already has "some" capability to kill cancerous cells. It is just that the rapid growth rate of cancerous cells overwhelms that inherent capacity.
If an intervention can kill the tumors and MOST of any "shed" cells (which antigen-antibody technology can do), then the body's natural immune response can probably handle the low-level residual. It is NOT necessary to "kill every cell".
I respectfully disagree.
Anything less than 100% kill and you risk recurrence, period.