NYTimes.com: Some of My Best Friends Are Germs

From The New York Times:

Some of My Best Friends Are Germs

Medicine used to be obsessed with eradicating the tiny bugs that live within us. Now we're beginning to understand all the ways they keep us healthy.

http://www.nytimes.com/2013/05/19/magazine/say-hello-to-the-100-trillion-bacteria-that-make-up-your-microbiome.html