Make other arrangement for time being as such of the rising cases of covid or HFMD. Or you can send her on alternate days. The school would usually send notes via Little Lives of the student infected with HFMD or Covid cases. To which then, it is up to you to send or not if you think the rising cases can cause other kids affected too. Having said that, mask will still be on and maintain good hygiene as well as good immunity to avoid getting sick often.