You have to abide by the rules your sitter has set up or find a replacement. You said if they have symptoms during the day they shouldn't go to daycare, but I've never heard of a school or daycare that the 24 hour rule wasn't in place for vomiting and/or fever. If your child threw up or had fever during the night, they should not go to school the next day. You stated that not going is to protect other children, but not adults from exposure. As a former teacher, I wouldn't want to be exposed either. Many childcare workers and teachers have children of our own that we want to protect from sickness, too. I think you are being a bit selfish. Don't you care if someone else gets sick because of exposure to your child? If my child was sick, I(or my husband) would take the day off to stay home with them.