Highlights ■ Convalescent plasma did not affect the outcomes. ■ Convalescent plasma improved some laboratory parameters but had no impact on clinical outcomes. ■ Dialysis and the World Health Organization severity score on day 0 influenced the outcomes. ABSTRACT Objective: This study compared the outcomes of two cohorts of patients with coronavirus disease 2019 (COVID-19) who received COVID-19 convalescent plasma transfusions between 2020 and 2021. Methods: This retrospective study was conducted at a tertiary hospital in São Paulo, Brazil. We […]