A number of infectious diseases can be spread from one person to another by contaminated hands. These diseases include gastrointestinal infections, such as Salmonella, and respiratory infections, such as influenza. Washing your hands properly can help prevent the spread of the germs (like bacteria and viruses) that cause these diseases.
Some forms of gastrointestinal and respiratory infections can cause serious complications, especially for young children, the elderly, or those with a weakened immune system.
