Change in ordinal score in patients on arginine versus placebo. <br/ >Proposed Ordinal Score: <br/ >Category Clinical status Notes <br/ >1 Discharged/Ready for discharge with no symptoms; stable oxygen saturation on ambient air <br/ >2 Ready for discharge with no symptoms; stable oxygen saturation on nasal prongs 2L of oxygen <br/ >3 Hospitalised; on supplemental oxygen via Nasal prongs or Face mask <br/ >4 Hospitalised; on supplemental oxygen via Non rebreathing mask <br/ >5 Hospitalised; on NIV or HFNC <br/ >6 On mechanical ventilation <br/ >7 On mechanical ventilation and inotropes/HD <br/ >8 Dead <br/ > <br/ >Timepoint: Daily assessment over 10 days <br/ >

Change in ordinal score in patients on arginine versus placebo. <br/ >Proposed Ordinal Score: <br/ >Category Clinical status Notes <br/ >1 Discharged/Ready for discharge with no symptoms; stable oxygen saturation on ambient air <br/ >2 Ready for discharge with no symptoms; stable oxygen saturation on nasal prongs 2L of oxygen <br/ >3 Hospitalised; on supplemental oxygen via Nasal prongs or Face mask <br/ >4 Hospitalised; on supplemental oxygen via Non rebreathing mask <br/ >5 Hospitalised; on NIV or HFNC <br/ >6 On mechanical ventilation <br/ >7 On mechanical ventilation and inotropes/HD <br/ >8 Dead <br/ > <br/ >Timepoint: Daily assessment over 10 days <br/ >