A Healthy Social Life

You might think that people with an active social life actually get more colds than their less sociable counterparts, because sociable ones tend to expose themselves to more people. But the opposite is true. This study showed that when injected with a cold virus, unhappy people are three times as likely to get a cold as unhappy people. The gene or genes that govern sociability "may contribute to biological processes that play a role in the body's ability to fight off infection."