http://www.cdc.gov/flu/protect/habits.htm
Centers for Disease Control and Prevention, U.S. Department of Health and Human Services
The single best way to prevent the flu is to get vaccinated each year, but good health habits and antiviral medications are other measures that can help protect against the flu. This page offers simple steps you can take in your day-to-day life to help you stay healthy during flu season. Steps include stay home when you are sick, cover your mouth and nose, and clean your hands.