Table 3.
Anti-SARS-CoV-2 antibodies tested with ELISA and ICA according to the days after disease onset in consecutive serum samples from the 21 patients with RT-qPCR-confirmed COVID-19
| Days after onset | Samples, N | Anti-SARS-CoV-2 positive antibodies | |||
|---|---|---|---|---|---|
| ELISA | ICA | ||||
| IgA, N (%) | IgG, N (%) | IgM, N (%) | IgG, N (%) | ||
| 0–3 | 11 | 4 (36.4) | 0 (0.0) | 2 (18.2) | 0 (0.0) |
| 4–7 | 17 | 8 (47.1) | 2 (11.8) | 5 (29.4) | 3 (17.7) |
| 8–11 | 18 | 15 (83.3) | 9 (50.0) | 13 (72.2) | 11 (61.1) |
| ≥ 12 | 14 | 14 (100.0) | 13 (92.9) | 14 (100.0) | 13 (92.9) |
| Total | 60 | 41 (68.3) | 24 (40.0) | 34 (56.7) | 27 (45.0) |
ELISA, enzyme-linked immunosorbent assay; ICA, immunochromatographic assay