Her movement is still very popular today. Don't ask me why. Faith healers have claimed millions of cures, and millions of people back up their claims. To answer that we must first examine the original illnesses. To answer these questions we must examine the nature of illness itself.
Most diseases are self-limiting.
That is, if you wait long enough, even with no treatment at all, the problem will eventually go away. With more serious conditions, such as arthritis and cancer, this is not usually the case. Nevertheless, faith healers are still enormously popular. They claim to be able to cure everything, including arthritis, cancer, paralysis, and just about everything else that can go wrong with human health. Think about it.