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Table 1 COVID-19 severity triage

From: COVID-19 clinical and laboratory diagnosis overview

Mild Severe Critical
• Fever
• Respiratory symptoms
• Pneumonia on chest radiography
Need to meet one of the following criteria:
• Respiratory distress, RR ≥ 30/min
• Resting blood oxygen saturation ≤ 93%
• Arterial blood oxygen partial pressure (PaO2)/FiO2 ≤ 300 mmHg
Need to meet one of the following criteria:
• Respiratory failure needing mechanical oxygenation
• Shock
• Development of other organ failures, requiring intensive care unit care