This is not the original article I had. The original article was not on Brietbart. I am still trying to rescue the original article and study from my stuck "sticky notes". This is similar, I think. I don't like to use Brietbart as a source, only because it is known to be pro-conservative, maybe not as likely to be believed as some other source, but it is difficult to find anything on a "google" search these days, and it does have the Virology report within it, so I am sending these for now. Be sure to look at the links within the articles as they lead tothe actual studies and who did them:

https://www.breitbart.com/politics/2020/03/19/chloroquine-known-as-effective-against-coronavirus-since-2005/

Here is the study from article: https://virologyj.biomedcentral.com/articles/10.1186/1743-422X-2-69

This is another link off of above brietbart article: https://www.breitbart.com/politics/2020/03/18/malarial-drug-chloroquine-effective-against-coronavirus/