When I picked up my son at school, I could immediately tell he didn't feel good. He's been battling a cold and we all thought he was getting better, but apparently not. He told me he wanted to go home halfway through the day, but he forgot to tell the teacher. I'm not sure how you forget that, but at least he's home and resting.
It seems he has found one thing to make him feel a little better:
If you are a clone trooper, you don't have time to be sick.