This isn't far from what immunotherapy is doing. Cancer can only thrive when it avoids an immune response, either by looking sufficiently like a healthy cell t

This isn't far from what immunotherapy is doing. Cancer can only thrive when it avoids an immune response, either by looking sufficiently like a healthy cell to remain below the radar or actively suppressing actions of the immune system. Immunotherapy looks for ways to counteract this 'feature' and allow the immune system to do its job and murder the bastards. We're still effectively in the early days of this approach to treating cancer and results are mixed, but it shows incredible promise and I feel that it ultimately will be the way we beat most if not all cancers.