Severe disease (13.8% of population) | Critical disease (6.1% of population) |
Dyspnoea | Requiring mechanical ventilation |
Respiratory frequency ≥30/min | Septic shock |
Blood oxygen saturation ≤93% | Multiple organ dysfunction/failure |
PaO2/FiO2 ratio <300 | |
Lung infiltrates >50% of the lung field within 24–48 hours |