Results
Completed FLU-PRO Plus questionnaires were available from 84% of participants in the sotrovimab arm (n = 446) and 83% of participants in the placebo arm (n = 437) on Day 1. By Day 21, completed questionnaires were available for 50% of participants in the sotrovimab arm (n = 262) and 48% of participants in the placebo arm (n = 250). Full details of questionnaire availability and proportions of electronic PROs versus paper questionnaires are shown in Table S1 in Additional file 