personally im taking vit D3 /Zinc/quercetin/black cumin oil and occasionally ivermectin (not a herbal remedy) as a prophylactic.
Dr James recommended Indometacin in another post here-- which ive found to be good as well.
there is more info coming in from many places - and hopefully we ll get on top of this virus
ivermectin is being used alot in south america /india and other places alot of feed back is very promising both as preventative and treatment. I also think big pharma is probably thrwarting alot of things intentionally thus preventing any low cost solutions that might be a potential threat to their financial/profit making activities and agendas !! rem de sever being just one example - and we all know about the exhorbitan prices for hep c treatment when the drugs first came out GiLL EE add for example..
I'm equally sad to say we've tested pretty much every HIV/Hep C medication we could get hold of, both in the lab and in the clinic, and the results have been disappointing (once we've got to real patients with real disease in the clinic).
It's not that we can't/won't have antivirals active against SARS-CoV-2, it's just that our current HIV/HCV meds are not quite get up to snuff. Close but no banana and all that...