TABLE 1.

The concurrent World Health Organization criteria for clinical severity provided at the time of study (https://www.who.int/publications/i/item/clinical-management-of-covid-19)

Severity	Clinical presentation
Mild disease	‐ Symptomatic patients (fever, cough, fatigue, anorexia, myalgia, sore throat, nasal congestion, headache, diarrhea, nausea, anosmia, ageusia) with no evidence of pneumonia or hypoxia.
Moderate disease	‐ Clinical signs of pneumonia (fever, cough, dyspnea, fast breathing, shortness of breath) but no signs of severe pneumonia, including SpO2 ≥ 90% on room air.
Severe disease	‐ Clinical signs of severe pneumonia (fever, cough, respiratory rate > 30 breaths/min, severe respiratory distress, SpO2 < 90% breathing ambient air).
	‐ Clinical signs of acute respiratory distress syndrome (ARDS) according to Berlin definition.