[Mahler9th]

In all or nearly all healthcare systems, clinical, scientific and regulatory treatment evaluations focus on safety and efficacy.

In most, if not all cases, the process of establishing safety and efficacy involves "studies." When/as applicable these often start in vitro, then small animals, then small groups of people, then large trials.

I have not yet read published studies describing the potential efficacy of Chloroquine in the treatment of Covid-19 disease, but I have heard the NIH lead indicate that the work done thus far is on smallish numbers of cases, and in non-controlled studies.

Non-control could mean that we don't know if any of the folks who got benefcial results would have not gotten the same results if they had not been given the drug.

Folks are working really hard and as fast as they can to figure out if this drug can help. And I think they will try to be smart about relaxing some, if any of the norms in place to be sure that any final decisions don't place public health at more harm than good.