The use of Real World Evidence in Covid-19 is growing, and thats a good thing. Properly implemented, RWE has the potential to deliver solid results faster than Randomized Controlled Trials, as I explained in a .css-mckguv{-webkit-transition:background 0.25s var(--ease-in-out-quad),color 0.25s var(--ease-in-out-quad);transition:background 0.25s var(--ease-in-out-quad),color 0.25s var(--ease-in-out-quad);color:var(--theme-ui-colors-accent,#6166DC);}.css-mckguv:visited{color:var(--theme-ui-colors-accent,#6166DC);opacity:0.85;}.css-mckguv:hover,.css-mckguv:focus{-webkit-text-decoration:underline;text-decoration:underline;}previous blog post.So I couldnt miss the largest observational study published to date on the effects of (hydroxy-)chloroquine, in 96 032 hospitalised Covid-19 patients, from an international registry comprising 671 hospitals in six continents:Mehra, M.