Table 2 Patients and sample collection information.

From: A novel highly quantitative and reproducible assay for the detection of anti-SARS-CoV-2 IgG and IgM antibodies

Variables

Early stage

Convalescent

Sample collection date

From 2/24/2020 to 5/3/2020

From 4/11/2020 to 6/2/2020

Total number

50

60

Sex (M/F)

39 / 11

48 / 12

Age, median (range)

50 (23–85)

53 (25–85)

Days since symptoms, median (range)

9 (1–25)

36 (20–95)

Disease severity1 (moderate/severe/critical)

26/19/5

36/19/5

  1. 1Disease severity definitions—Moderate: febrile or fatigue, and with/without pneumonia, and no oxygen inhalation required; Severe: febrile, fatigue, dyspnea, severe pneumonia identified, and oxygen inhalation required; Critical: febrile, fatigue, severe dyspnea, critical pneumonia identified, and positive pressure ventilation plus extracorporeal membrane oxygenation (ECMO) required.
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