Primary Outcomes
Measure: Time to recovery of peripheral capillary oxygen saturation (SpO2) from baseline Time: Baseline to Day 28
Measure: 28-day all-cause mortality rate Time: Baseline to Day 28
Secondary Outcomes
Measure: Percentage of subjects achieving recovery in SpO2 Time: Baseline to Day 28
Measure: Mean change of PaO2/FiO2 Time: Baseline to Day 28
Measure: Mechanical ventilation time Time: Baseline to Day 28
Measure: Time of oxygen therapy Time: Baseline to Day 28
Measure: Lymphocyte count Time: Baseline to Day 28
Measure: Change in inflammation indicators (CRP or IL-6) from baseline Time: Baseline to Day 28
Measure: Improvement in body temperature Time: Baseline to Day 28
Measure: Mean change from baseline in the clinical improvement based on ordinal scale recommended by the WHO R&D Blueprint during treatment period Time: Baseline to Day 28
Measure: Improvement at Day3, 7, 11 & Day14 based on ordinal scale recommended by the WHO R&D Blueprint during treatment period Time: Baseline, Day 3, Day 7, Day 11, Day 14
Measure: Time to get categories 1 to 4 in the 8-points ordinal scale Time: Baseline to Day 28
Measure: Time to attain an improvement of 1 point on the ordinal scale Time: Baseline to Day 28