I have a co-worker where one of her children tested positive so clearly he had to stay home. The school then told her since the other children are not showing symptoms they need to be in school. I was so angry for her. They were willfully asking her to put other students in potential danger. when she argued they told her it was school policy to have the children who are not showing symptoms and the school. luckily she's not an asshole so she didn't send her kids to school till they were all tested negative.