You may have heard about this but this drug, but there are more and more articles about its effectiveness against Covid-19. China and South Korea are using it now with great results. Combined with an antibiotic, it is reducing the sick time for those infected from a couple of weeks to a few days. It can be mass produced. Promising.

https://www.google.com/amp/s/nypost.com/2020/03/19/old-malaria-drug-hydroxychloroquine-may-help-cure-coronavirus-study/amp/