So maybe the recent crazy for anti-bacterial everything is not necessarily a good thing? From Science Daily:
Exposure to specific bacteria in the environment, already believed to have antidepressant qualities, could increase learning behavior, according to research presented at the 110th General Meeting of the American Society for Microbiology in San Diego.
What next, the discovery of midichlorians and their impact?
Also previously Cut Down On Infections By Cutting Down On Antibiotics