Excellent post.
Don’t forget the B vitamins, in particular thiamine. A thiamine deficiency (beriberi) is serious for lungs.
Also, vitamin A.
The Dr David Brownstein protocol calls for 4 days of A, Bcomplex, C and D3, plus inhaled dilute nebulized saline, peroxide or lugol’s for people who develop breathing problems. The doses of A and D3 are quite high for the 4 days. The C can be as high as 200 g/day for serious illness...use up to bowel tolerance. Robert Cathcart MD has a table of vitC dosages for various infections.
PVP iodine has been shown to kill the virus in lab experiments.
I have it in a nasal spray.
Havent used it in my mouth because worried about staining my teeth
Betadine makes a gargle.
I found this article a couple of years back ... very interesting how low levels of D appear to be implicated with “regular” influenza & now also COVID.
This is an article on the Vitamin D “Hammer”. It is a serious article by doctors who have used this in their practice. It’s only 4 paragraphs ... worth your time.
Vitamin D for influenza
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4463890/