A foodborne illness is spreading throughout the country, and the Centers for Disease Control and Prevention has yet to pinpoint the source. Dr. William Schaffner, a professor of preventive medicine at... more 
A foodborne illness is spreading throughout the country, and the Centers for Disease Control and Prevention has yet to pinpoint the source. Dr. William Schaffner, a professor of preventive medicine at Vanderbilt University, discusses its spread, as well as symptoms of the sickness. less 
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Thu, Jul 25, 2013 8:59 AM EDT