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Sensitivity of the COVID-19 IgG/IgM Duo and Elecsys anti-SARS-CoV-2 assay dependent on the time post positive PCR
| Days post PCR | ||||
| 0–6 | 7–13 | ≥14 | ||
| COVID-19 IgG-IgM Duo | IgM | 45.2 (30.2–61.2) | 66.7 (41.2–85.6) | 90.5 (68.2–98.3) |
| IgG | 69.0 (52.8–81.9) | 94.4 (70.6–99.7) | 100 (80.8–100) | |
| IgM or IgG | 81.0 (65.4–90.9) | 94.4 (70.6–99.7) | 100 (80.8–100) | |
| Elecsys anti-SARS-CoV-2 | Total ab (incl IgG) | 57.1 (41.7–72.0) | 88.9 (63.9–98.1) | 95.2 (74.1–99.8) |
