Two people died and 68 became severely ill after dining at a family restaurant in the Midwest. An investigation revealed that several 10-pound packages of raw ground beef were incorrectly stored on the top shelf in a walk-in cooler. Authorities determined that the ground beef dripped onto fresh rolls and cartons of chocolate milk that were stored below. Guests who had eaten the rolls or were served the chocolate milk became ill. The operation, which had voluntarily closed for the investigation, never reopened. 1) Which foodborne illness did the dining guests die from? 2) What should have been done differently at the operation to prevent the outbreak?