“She’s a bad mother. Look how messy that baby is!” It took a moment for me to translate the accusation into English and process the criticism being leveled. On overseas assignment in a developing country, I was eating among locals in a noodle shop, reminding myself of the hygiene hypothesis – exposure to germs early in …
![Hygiene Hypothesis](https://bumpkin.com/wp-content/uploads/2014/07/hygiene-hypothesis.png)