The potential for this drug as a inhibitor has now been known for 3-4 weeks now in isolated cases. There is some observation that poor industrialized countries who have very poor water source systems and problems with malaria, have not shown virus presence yet ... these are countries such as Africa, south America, and other 3rd world nations.
I spoke to my good friend who is representative in South Africa this weekend and is very knowledgeable about the culture. They are aware of the hydrochloroquine "fix"; however, stated that Africa and many neighboring countries will never be a reliable base line for evaluation. Very high density of people who live a very communal life style where close human content is a ritual. When you look at Africa, The Middle East, Indonesia, and India ... no such thing there as social distancing.
From what i understand, the FDA did not approve, they made an emergency acceptance of the drugs use for persons with symptoms or in care to trial use the drug. Probably for high risk patients in hi-risk care. Probably lots of pressure to do so by the Whitehouse, a good thing though as these patients probably have no option.
This source drug you reference has been around for over 100 + years, was made famous by the Brits who invaded & occupied 3rd world nations ... quinine water was considered effective against malaria.
Start drinking Gin & Tonics ... you'll be good to go