Additional file 1: Table S1. Clinical type of COVID-19. Table S2. CT scoring system for lung lesions. Table S3. Laboratory findings of patients on admission to the intensive care unit (n = 24). Table S4. Individual treatment with convalescent plasma transfusion (n = 14). Figure S1. Comorbidities and complications of patients received convalescent plasma transfusion (n = 14). Figure S2. Serologic assays for patients received convalescent plasma transfusion (n = 14).