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| Time (days)(1) | Positivity rate for each ELISA assay | |||
|---|---|---|---|---|
| RBD-IgG | RBD-IgM | Spike-IgG | Spike-IgM | |
| 0–7 | 7/7 | 7/7 | 5/6 | 7/7 |
| 8–14 | 31/32 | 31/32 | 15/16 | 15/17 |
| 15–21 | 22/22 | 22/22 | 5/5 | 6/7 |
| >22 | 16/16 | 14/16 | 14/15 | 14/15 |
| Total | 76/77 | 74/77 | 39/42 | 42/46 |
(1) Time after RT-PCR confirmation.
