The so-called hygiene hypothesis is right. Scientists say they've figured out how exposure to germs in infancy reduces the risk of allergies and other immune system problems.
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Read the complete post at http://www.npr.org/blogs/health/2012/03/23/149232765/why-getting-grimy-as-a-child-can-make-for-a-healthier-life?ft=1&f=103537970
Posted
Mar 23 2012, 01:53 PM
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Shots - Health Blog