Scores 0-3 are for community cases.
Details
We generally can't tell the difference between 7 and 8.
4: Hospitalised; no oxygen therapy
5: Hospitalised; oxygen by mask or nasal prongs
6: Hospitalised; oxygen by NIV or high flow
7: Intubation and mechanical ventilation, pO2/FiO2 >= 150 or SpO2/FiO2 >= 200
8: Mechanical ventilation pO2/FIO2 <150 (SpO2/FiO2 <200) or vasopressors
9: Mechanical ventilation pO2/FiO2 <150 and vasopressors, dialysis, or ECMO
10: Dead