The study is a multicenter, adaptive, randomized, double-blinded, and placebo-controlled Phase II/III trial. It will be conducted globally. The study will evaluate the efficacy and safety of SCTA01 compared to placebo both given with BSC in participants with severe COVID-19. The subjects will be randomized by 1:1 ratio to SCTA01 and placebo group. The primary objective of the study is to evaluate participant survival from randomization to Day 29 between study group and control group. At the end of the Phase II part of the study, an interim analysis will be performed for safety run-in and futility stopping.
This is an adaptive, randomized, double-blinded, placebo-controlled, Phase II/III study conducted to evaluate the effect of SCTA01 on participant survival and clinical efficacy in participants with severe COVID-19 admitted to high dependence or ICUs.~The study duration of subject participation will be up to: 120 days Participants will receive a single intravenous (IV) infusion of SCTA01 at Treatment day 1. Follow up visits will be up to 120 days or early withdrawal visit.