Table 2:

Clinical screening criteria

Clinical screening criteria	Period 1	Period 2
Complaints	Fever Shortness of breath Respiratory distress Respiratory symptoms Cough Influenza or flu-like illness	Not applicable^*
Discharge diagnoses	Anosmia ARDS Asthma Bronchitis Chronic obstructive lung disease Confirmed case of COVID-19 Confirmed COVID-19 Coronavirus Cough, NYD COVID COVID-19 FUO Fever, NYD Flu-like illness Influenza-like illness Pharyngitis Pneumonia Pulmonary edema/congestive heart failure Pulmonary embolism Respiratory distress Respiratory disease, NOS/NYD Sepsis, NYD SOB Sinusitis Suspected case of COVID-19 Suspected COVID-19 Upper respiratory infection Upper respiratory tract infection Viral pneumonia	Anosmia ARDS Confirmed case of COVID-19 Confirmed COVID-19 Coronavirus Cough, NYD COVID COVID-19 FUO Fever, NYD Flu-like illness Influenza-like illness Pneumonia Respiratory distress Respiratory disease, NOS Sepsis, NYD SOB Viral pneumonia

Note: ARDS = adult respiratory distress syndrome, COVID-19 = coronavirus disease 2019, FUO = fever of unknown origin, NOS = not otherwise specified, NYD = not yet diagnosed, SOB = shortness of breath.
↵* In period 2, screening by chief complaint should be avoided, unless the site cannot screen charts by discharge diagnosis.