Quercetin is yet another medicine that has tested effective against COVID-19, both for preventing and for treating the disease.  Hydroxychloroquine and Ivermectin, were shown earlier to be effective against COVID,  have been denigrated and repressed by Big Pharma, Big Government, and Big Media. Physicians have been threatened with loss of license for prescribing these proven drugs.  And pharmacists have been threatened with loss of license if they fill legitimate prescriptions written for use against COVID-19. 

Quercitn is different in at least one important respect.  It  is an over-the-counter medication, which does not does physician's prescription.  Like Vitamins C and D and zinc.  Quercitin is inexpensive,  and readily available from many suppliers.