I’m trying to find that study. I thought I had a link bookmarked but now I can’t find it. I think it was specific to coronaviruses.
I think I found it again. Here it is for any who want to read it.
“Chloroquine is a potent inhibitor of SARS coronavirus infection and spread“
Vincent, M. J., Bergeron, E., Benjannet, S., Erickson, B. R., Rollin, P. E., Ksiazek, T. G., Seidah, N. G., & Nichol, S. T. (2005). Chloroquine is a potent inhibitor of SARS coronavirus infection and spread. Virology journal, 2, 69. https://doi.org/10.1186/1743-422X-2-69
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1232869/
See post 21, as well as the back up article(s)...
Opinion: Fauci Knew About HCQ In 2005 – Nobody Needed To Die
http://www.nw-connection.com/?p=6147
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1232869/