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Antibody reactivity by the Ansh IgG and IgM ELISA assays in patients positive for SARS-CoV-2 by RT-PCR, grouped by number of days since the first reported symptoms (equivocal samples were considered positive).
| IgG |
IgM |
|||
|---|---|---|---|---|
| Days post-onset | % Positive | Mean AU | % Positive | Mean AU |
| < 6 | 30% (3/10) | 14.4 | 10% (1/10) | 5.5 |
| 6 to 14 | 100% (9/9) | 69.6 | 77.7% (7/9) | 18.1 |
| >14 | 100% (24/24) | 101.2 | 90.9% (20/22) | 21.6 |
