Mysterious stomach bug spreading in U.S.: What you nee

Mysterious stomach bug spreading in U.S.: What you need to know
CBSTV Videos
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.
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