Clinical status of subject at day 15 (on a 7-point ordinal scale): 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 subject at day 15 (on a 7-point ordinal scale): 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.