1) Time to clinical improvement or hospital discharge up to Day 28, defined as the time from randomization to either an improvement of two points on the 11-point WHO Clinical Progression Scale or discharge from the hospital, whichever comes first.

1) Time to clinical improvement or hospital discharge up to Day 28, defined as the time from randomization to either an improvement of two points on the 11-point WHO Clinical Progression Scale or discharge from the hospital, whichever comes first.