The basic question comes down to WHO do you believe. My money is on US study. It is apparent that better outcome resulted when the need for oxygen is less.
The benefit of remdesivir was most apparent in patients with a baseline ordinal score of 5 (receiving low-flow oxygen). Some of this difference may be due to the larger sample size in this category since confidence intervals for baseline ordinal scores of 4 (not receiving oxygen), 6 (receiving high-flow oxygen), and 7 (receiving ECMO or mechanical ventilation) were wide. However, the interaction tests suggest greater benefit (with respect to recovery and mortality) in lower ordinal score categories. This should not be interpreted as conclusively showing a lack of efficacy in higher ordinal score categories. The median recovery time for patients in category 7 could not be estimated, which suggests that the follow-up time may have been too short to evaluate that subgroup.