The theory is that cancer cells develop a protein barrier that hides their anomaly from the immune system. The polio virus is thought to damage that and the immune system thus starts to recognize them as mutated cells.
For the patients in the 60 minutes special who experienced remission (if you will), they received one injection, then it took over a year for the tumors to go away.
Can you explain the significance of injecting polio into cancer cells? Is it just to make the immune system definitely see that the cell is bad?