Frequent handwashing is one of
the best defenses against getting or spreading colds or the flu. Cold
and flu viruses are spread when a sick person coughs or sneezes and
droplets carrying germs land on their hands or surfaces. When you come
into contact with germ-covered surfaces, proper handwashing prevents the
spread of these germs from your hands to your nose or mouth. In a
study, military recruits were told to wash their hands five times a day.
After 2 years, they had 45% fewer cases of respiratory illness
compared to the sickness rate of previous recruits. Use alcohol-based
sanitizers when you can't wash your hands.