• Clinical status of patients at day15 using the 7-point ordinal scale. The 7-point ordinal scale for clinical status is: 1. Not hospitalized, no limitations on activities, 2.Not hospitalized, limitation on activities, 3. Hospitalized, not requiring supplemental oxygen, 4. Hospitalized, requiring supplemental oxygen, 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices, 6. Hospitalized, on invasive mechanical ventilation or ECMO, 7. Death.

• Clinical status of patients at day15 using the 7-point ordinal scale. The 7-point ordinal scale for clinical status is: 1. Not hospitalized, no limitations on activities, 2.Not hospitalized, limitation on activities, 3. Hospitalized, not requiring supplemental oxygen, 4. Hospitalized, requiring supplemental oxygen, 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices, 6. Hospitalized, on invasive mechanical ventilation or ECMO, 7. Death.