Table 1.

Ordinal scale for clinical improvement for COVID-19.

0	No clinical or virological evidence of infection
1	No limitation of activities
2	Limitation of activities
3	Hospitalized, no oxygen therapy
4	Oxygen by mask or nasal prongs
5	NIV or high flow oxygen
6	Intubation and mechanical ventilation
7	Ventilation + additional organ support - ino/RRT/ECMO
8	Death