The Minnesota Department of Health states that cross-contamination happens when you transfer bacteria from one object or place to another. To avoid spreading the bacteria, there are five basic steps you need to adhere to: (1) Wash your hands before and after each meal preparation; (2) Wash all vegetables before and after peeling/cutting; (3) Disinfect all food preparation surfaces before and after each meal; (4) Make sure all cooking tools (including cutting boards) are clean; (5) Use separate cutting boards for meat, vegetables, and dairy.