One would never think that the topic of parasitic worms could be thought to require nuance. Worms are bad, anything that kills them is a good thing, end of story. But surprisingly, there has been a significant amount of research in recent years that is hinting at the idea that, in some situations, parasitic worms are actually a good thing. In fact, some attribute the loss of these worms from our digestive tracts as leading to an increase in various conditions in the west, including...