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Washington Post
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Frequent-shopper cards helped pinpoint source of a Salmonella outbreak
Los Angeles Times (blog)
Those cards you swipe at grocery stores — sure, they'll shave some money off your bill and give stores all kinds of info about your food and personal-toiletry preferences — well, now they're a public health tool. With shoppers' permission, the Centers ...
CDC Successfully Uses Supermarket Data Cards in Salmonella TrackingiHealthBeat
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