Table 1.

Modified World Health Organization COVID-19 Severity Score [28]

WHO Score	Severity	Description
1	Mild	Asymptomatic infection not requiring admission
2	Mild	Symptomatic infection not requiring admission
3	Moderate	Admitted, not requiring supplemental oxygen
4	Moderate	Admitted, requiring oxygen by nasal cannula
5	Severe	Admitted, requiring oxygen by high-flow nasal cannula
6	Severe	Admitted, requiring mechanical ventilation
7	Severe	Admitted, requiring mechanical ventilation plus vasopressors or renal replacement therapy
8	Severe	Death from COVID-19 2019–related cause

Abbreviations: COVID-19, coronavirus disease 2019; WHO, World Health Organization.