
Back at the start of the pandemic, Inserm, through its REACTing consortium, set up Discovery: a European clinical trial to evaluate the efficacy of four antiviral drugs repurposed for the treatment of patients hospitalized with COVID-19 (remdesivir, hydroxychloroquine, lopinavir and interferon beta-1a). In parallel, the World Health Organization (WHO) set up Solidarity, a major consortium of clinical trials also aimed at testing the efficacy of these four treatments. Discovery then joined forces with Solidarity to help supply it with robust and rigorous data.