Dr Ardis stated, as evidenced in this video to take the following nutritionals steadily for prevention of Covid:
EDTA
Glutathion
NAC
Zinc
Vitamin C (Ascorbic Acid)
Vitamin D3
Quercetin
In an acute emergency, if you get Covid, Dr Ardis suggests taking low doses of nicotine in the form of losenges, gum, or patches for a few days until symptoms subside