[confiscate]

as an extreme example

if Remdemsivir cures 100% of all Covid-19 cases, halfway through the trial, they would have enough data to show a net positive benefit. They don't need to finish the whole trial to declare Remdemsivir useful

the fact that they are running the whole trial to finish, most likely means the effect of Remdemsivir is not too noticeable. They need more data to get to statistical significance. Hence, they want the trial to run to original planned finish date.

my guess is

Remdemsivir probably has some positive effect. Say, 10% lower death rate if used during 1st few days of infection. Still great, much much better than our current situation of nothing. It would not cure Covid completely, but it would help substantially, especially in large populations of infected

[kmlevitt]

Looks like you may have been right. Oh well, I hope it at least helps people at the early stages of the disease.