Our school have just messaged to say there's a covid case in the class and they want every child to do a PCR test and twice weekly LF tests. Surely that's unnecessary? If my child tests negative today on a PCR, but gets a temp on Wednesday, he'd need another PCR, right? Given these kida are 4, it seems a but cruel. I can refuse can't I, and just do LF/PCR if any symptoms?