The Germ Files: The Surprising Ways Microbes Can Improve Your Health and Life (and How to Protect Yourself from the Bad Ones)

SOME GERMS ARE OUT TO GET US. . . . But we shouldn’t let a delinquent, pathogenic minority taint our view of the other 99.9 per cent.

The microbes living on and inside us outnumber the cells in our bodies three to one. Many provide services on which our well-being, our moods, our very lives depend. They help to digest our food and operate the immune system. They trade information about potential mates when we kiss. They alert the brain to problems in different locations around the body. The...