Quercetin has been a topic of many posts to this forum over the years. It may have a role to play in the coronavirus epidemic.
Coronavirus (COVID-19) Update 35
Dr Seheult
Coronavirus Pandemic Update 35: New Outbreaks & Travel Restrictions, Possible COVID-19 Treatments - YouTube
Update 34 deals with zinc..
I think of this as combat pharmacology: the situation is so serious that you can't wait for the results of randomised, double blind, placebo controlled trials to be published before acting.
John