We have recently come to the news that hand washing can be more than a custom taught in childhood. According to recent studies, hand washing before meals can prevent more than one scare. Specifically, researchers recommend washing their hands every two hours to get protection from certain viruses. It seems that gastroenteritis and hepatitis A viruses are the narrowest. You can spend months resting on them. If one is taken in hand, it can last more than seven hours so that it can spread the disease.