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There's a lot of evidence indicating that the hygiene hypothesis is not accurate or at the very least not the whole story. The old friends hypothesis suggests that exposure to certain pathogens is just as important or more so. Also microbiomes may play a part in things as well. Everything is a bit up in the air, tbh.

> really bad food allergies like Coeliac

Coeliac is just a word that means "relating to the abdomen", Coeliac Disease is a disease of the abdomen characterized by an immune response to gluten that causes the villi in the intestines to consume themselves, among other characteristic symptoms. Coeliac (or Celiac) Disease is not a food allergy.

Americans take more and more pills. Yet life expectancy is going down. So please prove these drugs are doing anything to improve the health of the American Population. Reproductive rates are worse than ever.