On a much happier note, the friend I mentioned recently now seems to be recovering. It wasn't a mild case. His breathing and oxygen levels were so bad he called an ambulance about 13-14 days into the illness. They said he was borderline for being hospitalised, but his oxygen levels weren't quite an emergency, so he would probably be as well resting at home. He couldn't get up and walk around one day. He still has fever, cold sweats, headache, fatigue, weakness, some breathing difficulty, hardly any appetite, and zero sense of taste and smell, c.20 days into the bug. He described eating apples as 'like eating crunchy water'.