How ill does your child have to be to keep them off school? Do you send them in with a cold? DD (6) catches every virus going and has so much time off school (she has a genetic condition that can cause a weakened immune system but her blood work always comes back ok). The problem is when she has a cold she often vomits because of the congestion as she has a sensitive gag reflex. I often feel like a bit of a fraud when I ring school to say she won't be in because she's vomited from congestion, but she's actually fine in herself. It's always worse in the morning too. I guess I'm wondering that her vomiting aside, if it's the "norm" to keep a child off school with a cold anyway?