Many restaurants prepare some of menu items in advance or use leftovers in their hot hold units the next day. In both cases, the foods travel through the dangerzonewhentheyarecooledforstorageandagainwhentheyarereheated. Foods that are hot held before serving are particularly vulnerable to pathogens. In addition to travelling through the danger zone twice, even in properlyoperatinghotholdunits,thefoodisclosetothetemperaturethatwill allow pathogens to grow.