There's a reason it's called the 'common cold.' In the U.S., adults average two to three a year, and in the U.K the average is three to five. And though you can get a cold at any time of the year (hurrah!), fall and winter create conditions that mean you're more likely to pick up one of over 200 viruses that cause colds.
If this all sounds a little depressing, we have a glimmer of hope for you. You already have a tool in your arsenal to help keep your immune system strong against colds: sleep.
