Columbia University study of hydroxychloroquine use in hospitalized patients found no benefit.
Two problems:

!) They only gave this antiviral to patients when they were full of virus enough to be hospitalized. Oh, they were nice enough to not count patients who died within 24 hours! This is WAY too late to use an antiviral. Not surprising at all that it didn't work. Doctors do the same stupid thing with Tamiflu.

2) No mention in the abstract of Zinc. One of the biggest benefits of HCQ is that it's a zinc ionophore, and zinc blocks viral replication. But I guess doctors think of zinc as a mineral, and therefor only important for deficiencies.