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The Salad Bar
Barring random acts of contamination, salad bars and hot food buffets in supermarkets are generally safe, says Lai. The FDA releases a "Food Code" guide every few years, which state and local health authorities typically use to ensure that stores keep foods at the right temperature, avoid cross-contamination and don't leave foods out long enough for bacteria to grow. Still, a 2016 study found that the salad tongs can contain significant levels of E. coli, so be sure to wash your hands after using them.