My kids' school does require parents to keep kids home if they're vomiting, have a fever, with the additional guidance if "seems sick" which some teachers/admin

My kids' school does require parents to keep kids home if they're vomiting, have a fever, with the additional guidance if "seems sick" which some teachers/administration members use to include excessive coughing and sneezing. There may be some loophole that makes that unenforceable, but I've been asked to get my kids when a fever had returned after we believed they had recovered.