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Qualitative assessment of SARS‐CoV‐2‐specific IgG antibody avidity in sera from patients with COVID‐19 according to the time of specimen collection since the onset of symptoms
| Time of serum collection, d | Number of sera tested/number of reactive sera after urea dissociation |
|---|---|
| 1‐7 | 5/1 |
| 8‐14 | 20/10 |
| 15‐21 | 10/9 |
| 22‐28 | 19/11 |
| >29 | 22/17 |
Abbreviations: COVID‐19, corona virus 2019; SARS‐CoV‐2, severe acute respiratory syndrome coronavirus 2.
