Like "I really think we've gotten to clean to teach our bodies how to work right in the world. That study may tie in to another one finding that there is a higher percentage of type 1 in the upper latitudes where people become Vitamin D deficient due to lack of enough sunlight, such as most of North America, Europe, and Iceland. Vitamin D is a big player in the immune system, so if you're already D deficient and your immune system is weak, living cleanly and then getting hit with a new germ could be one tipping point. So many different angles though. I think it all comes down to immune system influences."