I have no idea, im not a doctor. Based on pop-sci articles, i think the idea is that a cell mutates to have DNA that makes it harmful to you. But this cell is p

I have no idea, im not a doctor. Based on pop-sci articles, i think the idea is that a cell mutates to have DNA that makes it harmful to you. But this cell is part of your body, so it gets nutrients from the body and divides like any other cell, propagating its harmful DNA.