DS1 is 17 and at sixth form college. He's got a dry cough, temperature, chills/muscle aches and a bit short of breath. It's probably a bad cold or flu. We're wondering whether we're supposed to keep him away from others, or call 111? Normally he'd just tank up on lemsip and go into college. The government's advice on self-isolation etc is not terribly coherent, is it?