CDC Investigators Use Grocery Store Frequent-Shopper Cards to Track Salmonella Outbreak Source
Associated Press writer David Mercer reports on how epidemiologists at the Centers for Disease Control and Prevention used data from frequent-shopper cards issued by grocery stores to trace the source of a salmonella outbreak. That’s how investigators were able to track the source to a manufacturer of salami and then hone in on the pepper used to flavor the meat.
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