Here's a good rundown from Science on why hydroxychloroquine has failed large RCTs: https://www.sciencemag.org/news/2020/06/three-big-studies-dim-hopes-hydroxy

Here's a good rundown from Science on why hydroxychloroquine has failed large RCTs: https://www.sciencemag.org/news/2020/06/three-big-studies-dim-hopes-hydroxychloroquine-can-treat-or-prevent-covid-19 https://www.sciencemag.org/news/2020/06/three-big-studies-di...