Britanon here.
Have concluded that if worst comes to worst vis a vis COVID19 and it becomes a global pandemic and hospitals are overrun, old fashioned, home nursing may be the best we've got. Since I'm in the middle of a nasty dose of flu (day 10 today and only just beginning to feel better) thought I'd try out some home remedies and see which are most effective and hope they might be similarly effective on COVID symptoms. Mother was a practising nurse before the days of penicillin so some of these were the kind of remedies she was using in hospital for respiratory diseases like pneumonia or croup or bronchitis.
These are the results so far.
1) Ibuprofen works better than paracetamol in terms of relieving general discomfort although Lemsip, or similar, generic versions, also help.
2) Salt inhalation is a very good expectorant. Had a dry cough for a week then started salt inhaling which immediately loosened mucus in lungs allowing productive cough. I'm using a heaped tablespoon of Himalayan rock salt dissolved in a pint of boiling water in a wide-neck pot. Towel over head, long, deep breaths in and out to breathe in salty steam for about 10 mins. Repeat as many times/day as needed. More the better, I found. 3 times/day minimum.
3) Most soothing drink for dry/sore throat. Just-
boiled water infused with grated fresh ginger, whole (quartered) lemon, hand-squeezed and dumped in water, skin on, and raw honey to taste. Sieve out the bits before drinking.
4) Incense burner: a few drops of Olbas Oil (or Friar's Balsam if you can get hold of it - no longer available in UK) in water above burner helps clear stuffy nose.
Pray and stay positive about, and grateful for, the miraculous healing power our Creator has built into our bodies.