I can't remember the last time I took a sick day. I think I've maybe taken one or two in the 2.5 years I've been at my current job. (Of course, when I worked elsewhere, I made sure to take all of my sick days.)
I woke up around 4, went to the bathroom, and then started coughing and couldn't get back to sleep. I start coughing any time I do anything other than lie here, which is what I plan to do for the rest of the day.