By Scott Hensley Proving a negative is one of the biggest challenges in medicine. Even if a bunch of studies show an absence of serious problems with vaccines, for instance, skeptics can fret that a risk still lurks in the scientific shadows. Vaccination
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Read the complete post at http://www.npr.org/blogs/health/2010/03/vaccines_autism_risks_parents.html?ft=1&f=103537970
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Mar 02 2010, 05:58 AM
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NPR Blogs: Shots - Health News