In a typical kitchen there might be several cooks or chefs to that help prepare each dish. With each of those dishes being exposed from all of the cooks, it may be quite unsanitary. Anything that comes out of their mouth, including diseases and germs fall and will eventually make it to the ground. In some cases, it will land on the table or the food the cook is preparing. In worst case scenarios, the cook may choose to work while sick during their shift or possibly may be working without knowing he/she is sick.