It was prom night, May 2009, and Linda Rivera of Las Vegas, Nevada, was making goodies for her twin sons' party.
Breaking out a tub of cookie dough, she nibbled on a couple of bites as she portioned scoop after scoop onto the baking sheet. She never thought much about it. She had made cookies from refrigerated cookie dough a dozen times before.
The party went off without a snag. And Linda went on with life. But two days later, she began to feel sick - really sick.
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