Why Keeping Little Girls Squeaky Clean Could Make Them Sick

How girls are socialized may account for some disparities in the illnesses that affect them compared with boys. Young boys are more likely to be allowed to get dirty, which may expose them to more germs that help temper their immune systems.

Source: http://www.npr.org/blogs/health/2011/02/04/133371076/how-keeping-little-girls-squeaky-clean-could-make-them-sick?ft=1&f=1007

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