Children do seem quite protected and don't seem to pass it on as easily as adults do (so closing schools probably not necessary or effective).
And what about the hundreds of parents/grandparents and carers at drop off and pick ups? The caretakers, teachers, kitchen staff, cleaners, volunteers, after school care staff... Surely all these people will have an effect on numbers?
If a parent catches it, do they keep their kids off, what are the rules? We wouldn't have anyone to take them (semi rural).