Interesting WSJ article supporting hygiene hypothesis

This article is about asthma, but it relates to autoimmune disorders, such as IBD that we know all too well. In short, they found that children exposed to a more diverse set of bacteria during their childhood had less chance of developing asthma because their immune system was better "trained". Just thought folks might find it interesting.

Germ Exposure Reduces Asthma Risk

http://online.wsj.com/article/SB20001424052748704520504576162660949338624.html