It makes sense. As we've eliminated parasites from our bodies, we've developed more allergies and autoimmune disorders. That could be seen as mere coincidence, but what if it isn't?. What if by doing this, we're actually making ourselves as a society sicker?

There is precedence for this, by the way. Polio has always been around. Babies and small children got it in ancient times. Only occasionally did an older child or adult get the disease and they would end up paralyzed. In the dirty ancient world (and the 3rd world today), very few people made it to age 10 without being exposed and developing an immunity. Then we started cleaning ourselves in the Victorian era and suddenly polio was a horrifying scourge that paralyzed a lot of people. Turned out we were keeping our babies too clean and so they weren't getting exposed and acquiring immunity. So now we vaccinate to do what used to occur naturally.

This is a similar concept - harnessing nature to do what we've stopped doing naturally