Call in if you're sick. With a valid doctor's note, you can call in up to 3 days and then have them "combined" for only 1 point instead of 3 points. That's done through the Disney health services. That only works once per semester for CP's, but as long as you're not abusing the system and calling in for stupid reasons, you should be fine. I am on my program now and just got over pink eye a couple weeks ago. It jumped from my left eye to my right eye back to my left eye again = I had to call in 2 days (doctor's orders) for each time.
My roommate, however, got the swine flu about a month ago. Her parents live about 3 hours from here so she went home to stay with them. Apparently Disney has a policy where if you call in 10 days in a row, you get termed, so that's what happened to her. That being said, Disney is not heartless. This girl was ready to go home before she got sick, so she put no effort into trying to stay. I'm sure that if she had talked to a manger or health services or had a doctor's note or SOMETHING, things could have been different.