Chloroquine is not a new drug. It gets prescribed to people going to countries with malaria.
Hydroxychloroquine is a less toxic version of it (prolonged use of chloroquine has side effects; fewer issues with hydroxychloroquine).
Trial paper here:
https://drive.google.com/file/d/186B...IlWSHnGbj/view
Works especially well in combo with azithromycin (antibiotic)