His only symptom at the time was a high temperature for three days. He's been back to school for a week and now woken up coughing. I'm not sure what to do, should I take him for a PCR? I'm worried it'll come back positive anyway as he's probably still got the first infection in his system still. If it comes back positive then Christmas is cancelled. We've just done 20 consecutive days of isolation, I can't bear to do another 10!