Patient characteristics and setting  Facility cases: positive SARS‐CoV‐2Facility controls: negative SARS‐CoV‐2Country: ChinaDates: 20 January 2020‐05 February 2020Symptoms and severity: in positives: non‐severe (n = 31), including mild or moderate patients to severe (n = 42) including severe or critical patientsMild: patients had no pneumonia on imaging (CT)
Moderate: patients with symptoms and imaging examination showing pneumonia
Severe: patients meet any of the following:
respiratory rate ≥ 30/min
resting pulse SpO2 ≤ 93%
PaO2/FiO2 ≤ 300 mmHg (1 mmHg = 0.133 kPa)
multiple pulmonary lobes showing more than 50% progression of lesion in 24‐48 hours on imaging
Critical: patients meet any of the following:
respiratory failure requiring mechanical ventilation
shock
combination of other organ failure that requires admission to ICU
Demographics: M/F: cases 46/27, controls 104/127
median age: cases 53.0 years (43.5‐62.0) controls 34 years (29‐49)Exposure history: Wuhan‐related exposure and or close contact to confirmed COVID‐19 case: cases 40.7%, controls 57.5%