They weren't overloaded with toxins like modern societies either. The toxins weaken our bodies and allow the worms to eat their way out almost overnight. Back then, very few escaped to infest the rest of the body.
And cancer is a fungus infection brought in by those parasites, who were killed IN THE DIGESTIVE TRACT by the herbs, so no, cancer couldn't get started anywhere near as easily.
Plus, they didn't have the labs in Israel who work for the 'elites' making cancer into a more aggressive and nasty fungus, like we've had, the better to make sure more and more people get 'cancer'. Double *CHA-CHING*