TABLE 5.

Types of confirmed cases of COVID-19^a

Type	Characteristic feature(s)
Common (mild) cases	Mild clinical symptoms, visible imaging/no manifestations of pneumonia
Severe cases	In addition to the characteristics of the common cases, oxygen saturation ≤93% under resting state, partial arterial oxygen pressure (PaO2)/oxygen absorption concn (FiO2) ≤300 mm Hg, and pulmonary imaging showing significant lesion progression of more than 50% within 24 to 48 h
Critical cases	Patients have symptoms of respiratory failure or shock, require mechanical ventilation, or have multiple organ failure requiring ICU monitoring and treatment
Deceased cases	Death

^aICU, intensive care unit.