Ever since I witnessed my first co-worker "sniffling," I have been on the lookout for any symptoms of getting sick. It is cold and flu season, but have you ever wondered why we seem to get sick more in winter than summer?

I know that I have caught a cold during the summer, but the majority of any of my colds have been during the winter. So, why have I had a cold in summer, when it is not even COLD?

Discovery News has the answer: