DH is isolating as he had contact with a pupil who tested positive last Friday. He had sore throat a minor headache over the weekend, but was ok mon and tues. since Wednesday he has been laid up with aches and headache. My friend dropped her oximeter through my door today and have just checked his levels and is says 92. Should we be concerned by this? Obviously I don’t know what his usual levels are like, he is generally healthy although had a heart bypass a few years ago. He has no cough or breathlessness at all, just fatigue aches and headache