It's not the number of friends a person has, it's the variety of the social network that appears to provide a defense against illness. And the contact doesn't always have to be in person. Any contact in person or over the phone at least once every two weeks counts. Scientists aren't sure why a social network appears to help people fight colds. Colds are caused by viruses, which can be spread by social contact like shaking hands.
Doctors plan more research to determine exactly what the link is between friends and illness.
Some doctors believe that stress leaves people more susceptible to illness, and a strong social network may help people reduce stress. Regardless of how many friends you have, doctors at UT Southwestern Medical Center say one of the best things you can do to keep yourself from catching colds or other viruses is to wash your hands often. That keeps you from spreading cold germs from your hands to your mouth or eyes, which is often how they get into the body. Other Topics Health Watch is intended to provide general information only and should not replace the advice of a medical professional. You should contact your physician if you have questions about any of these topics.