The study entitled ‘Convalescent Plasma as Therapy for COVID-19 Severe SARS-CoV-2 Disease (CONCOVID Study)’ (clinical trial no. NCT04342182) is a randomized comparative trial which aims to evaluate the efficacy and safety of CP from COVID-recovered donors as a cure for symptomatic patients of COVID-19 in the hospital. Here, CP is linked to COVID-19.