One U.K. trial is transforming COVID-19 treatment. Why haven’t others delivered more results?

https://www.sciencemag.org/news/2020/07/one-uk-trial-transforming-covid-19-treatment-why-haven-t-others-delivered-more-results?utm_source=Nature+Briefing&utm_campaign=e9079e5ba2-briefing-dy-20200703&utm_medium=email&utm_term=0_c9dfd39373-e9079e5ba2-44992633

The trial transforming COVID-19 treatment

The United Kingdom’s large-scale trial Recovery (Randomised Evaluation of COVID-19 Therapy) stands out among the dozens of ongoing clinical studies that aim to test potential treatments for coronavirus infection. Involving more than 12,000 participants from hundreds of hospitals, the effort has delivered widely accepted verdicts on the potential of several antiviral drugs, and provided insights that have changed how physicians around the world consider treating COVID-19. Meanwhile, other large-scale initiatives have struggled to recruit participants and been slow to deliver results.
Science | 8 min read