Proper hand washing skills are the first line of defense against spreading illnesses including the common cold to more severe diseases such as meningitis, bronchiolitis, the flu, hepatitis A, and many types of diarrhea. When you eat food without washing your hands, the bacteria present on hands enter the body with the food.
As food travels through the esophagus so does bacterial contact with the mucous lining, which leads to common respiratory illnesses such as a sore throat. One of the leading causes of digestion problems is diarrhea. Viral infections commonly cause it. Washing hands with soap and water not only restricts viral transmission but also lowers the bacterial load present on your hands.