There is an "I'm not transcribing my DNA correctly" molecule in cells. A fidelity checker. This gets turned off by the spike protein. Normally the cell will slow itself down and call for the immune system to kill it before it divides too many times.

The spike protein keeps it going fast and wrong and undetected. So the cancer is "turbo" now and going hard enough that it will be chemotherapy resistant because the amount required will harm the patient too much.

We should be seeing this in the areas the vaccine likes to settle and where there are the right receptors for this to happen.