Feeling grumpy and antisocial because you've got a cold? That's not just a random side effect. It's your body saying, "Hey, slow down and rest so you can get better."
The study builds on previous evidence linking loneliness to more serious health problems, but the findings do not link the sheer size of a person's social network to cold symptom severity.
Just a couple extra hours can make a real difference, a study shows. Adults who slept only five or six hours were four times more likely to get sick when exposed to a common cold virus.