Many common health issues arise due to the lack of hand washing. These include the common cold, the flu, diarrhea, vomiting, and hepatitis. Through day-to-day activities dirt and germs can accumulate on your hands and especially under your fingernails. In turn, your hands can serve as a vector to pass these germs along to yourself and others. Infections are one of the leading causes of death in the United States, surpassed only by heart disease. It is taught in Military Biological Warfare Classes, even in common day to day washing your hands frequently and keeping your hands out of your face, eyes, mouth and nose is one of the best ways of avoiding getting sick even during a biological attack, it’s really that simple.