I've caught some kind of killer cold so I won't be in today. If you're interested in learning more about cold viruses, known as rhinoviruses, we have several books that have lots of information:
Biddle, Wayne. A Field Guide to Germs. [616.01 BID]
Crawford, Dorothy H. The Invisible Enemy: A Natural History of Viruses. [616 CRA]
Zimmer, Carl. A Planet of Viruses. [362.196 ZIM]
Hopefully I'll live long enough to see the discovery of the cure for the common cold, but for now, I'm hoping to just live through this day!