Cancer requires more than a single mutation.<p>Also, &quot;They did not look at tissues from two of the commonest forms of cancer – breast and prostate&quot; this is not an accurate description of &#x27;cancer&#x27; just the types of cancer they are studying.<p>Further, this is focused on types of tissue.  Environmental factors that increase risks for all forms of cancer are ignored.<p>PS: Mathematically, if a very small percentage of the population had much lower risks of cancer it would be almost impossible to detect.