I just got over being sick. I hate being sick because I never get a tiny cold; it's always a full-blown-sleep-for-days kind of sick.
When I was in school, the the first major I was in had a very strict attendance policy (I know, attendance in college seems very high school). Missing class was always detrimental for your grade. Sick people would drag themselves to class for fear of their grades being dropped a half or full letter (I can't remember which) but it was enough to scare us into mobility.