1. Hygiene. 2.Wash hands before preparing food, after touching raw food, especially meat and vegetables. Cooking: You can kill or stop certain germs such as salmonella and E.coli by thorough cooking. When preparing food: 1. always follow the instructions on the label. 2. always check your food is steaming hot in the middle-there should be steam coming out. 3. don’t reheat food more than once.