that 2005 pub med article:
this was in cells, not even in primates. It was a long way to proof of value in humans.
this is in cells, not even in primates. Long way to proof of value in humans
Results
We report, however, that chloroquine has strong antiviral effects on SARS-CoV infection of primate cells
Admittedly the report goes on to say: these features suggest that further evaluation of chloroquine in animal models of SARS-CoV infection would be warranted as we progress toward finding effective antivirals for prevention or treatment of the disease.
However, as the report concentrates on the ability of the coronavirus to utilize the angiotensin converting enzyme 2 (ACE 2) enzyme to penetrate the cell wall, and angiotensin is a peptide hormone that occurs in mammals, I think the study results can prove helpful towards inhibiting corona viral penetration of the cellular walls of humans.
Unhappily my expert understanding has all the depth of a freon spill. :)