This thread is locked because this subject is covered more thoroughly in the section of natural therapies. Specifically on quercetin at this link:
https://www.covid-19forum.org/index.php?topic=87.0
Since this thread was started I devoted a whole forum category to the subject of prophylaxis and prevention that you can go to by clicking here:
https://www.covid-19forum.org/index.php?board=10.0