Answer:
When they don't use hand gloves.
Step-by-step explanation:
Food handlers are the people in the areas where food products are packed or made. For example, in the food manufacturing company, or in the kitchen of the restaurants. Food handlers are required to wear hand gloves because they touch the food directly with their hands, and there are germs everywhere that could be transferred from the bare hands of the handler to the food. In this way, food can get contaminated. So in order to avoid the food contamination, food handlers are always required to wear the hand gloves, otherwise they can contaminate the food.