Rise in allergies has nothing to do with exposure to disease

Back in the late 1980s, scientists suggested that the sudden spike in allergy sufferers was the result of living in sterile homes and overzealous hygiene practices. Our immune systems, went the thinking, weren't being exposed to potentially important infections. A recent report, however, indicates that this "Hygiene… » 10/03/12 9:40am 10/03/12 9:40am