Table 1. Clinical classification of confirmed/suspected cases into asymptomatic, mild, moderate and severe categories.

RT-PCR (Reverse transcription-polymerase chain reaction); CXR (chest X-ray); CURB-65 score (confusion, uremia, respiratory rate, BP, age ≥ 65 years); qSOFA (quick sequential organ failure assessment) score; PaO₂ (partial pressure of arterial oxygen); FiO₂ (percentage of inspired oxygen); PaCO₂ (Partial pressure of carbon dioxide in arterial blood); JVP (jugular venous pressure); BP (blood pressure)

Data in the above table adapted from [9].

Classification	Definition
Asymptomatic	Nasopharyngeal RT-PCR positive for COVID-19 without any symptoms
Mild	Presence of symptoms consistent with COVID-19 such as fever, fatigue, cough (with or without sputum production), anorexia, malaise, muscle pain, sore throat, dyspnea, nasal congestion, or headache without any hemodynamic compromise, need for oxygen or chest x-ray findings
Moderate	Hypoxia (oxygen saturation ≤ 94%) or mild infiltrate on CXR
	Persistent high-grade fever for over three days
Severe	Shortness of breath with hypoxia with moderate to severe pneumonia without meeting the criteria for critical disease
Critical	Presence of any of the following with COVID-19:
	1. Respiratory rate >30 breaths/minute
	2. Severe respiratory distress (can't speak in sentences)
	3. Central cyanosis
	4. Confusion, agitation, restlessness
	5. CURB-65 (3 or 4 score)
	6. qSOFA score of 2 or more
	7. Widespread infiltrates on CXR
	8. PaO2/FiO2 ratio less than 300, or PaO2 less than 65 or Rising PaCo2
	9. Evidence of heart failure (Raised JVP, Gallop rhythm)
	10. Signs of shock: delayed capillary refill; cold, clammy peripheries; mottled skin; systolic BP less than 90 or less than 40 mmHg of baseline in hypertensive; urine output < 0.5 ml/kg/hr