Wash the board at all times and do not use the same cutting board nor knife after you cut different items
All are possible physical changes
Answer:
Chief Complaint: Vomiting. (It is due to the vomiting that the patient's stomach hurts, thus vomiting is the more pertinent complaint.)
Chief Complaint: Headache. (What caused the vomiting and runny nose?)
Chief Complaint: Chest Pain. (Answer to the question "what brought you in today"