I'm a teacher of little ones, ages 4-6. I spend the first quarter teaching them to cover their mouths, but it feels like a never-ending task. By the end of the year, most of them are able to do it. The problem really lies with the parents of children who vomit overnight. Parents give them medicine and send them to school, and then as soon as they walk into the classroom, they throw up again.

Many parents don't seem to realize that kids this age tell their teachers almost everything, so we know if they were sick before they came to school or not.