TABLE 3

Performance characteristics of four commercially available anti-SARS-CoV-2 IgG assays

TABLE 3
  • a The number of unique patients providing samples collected ≤7, 8–14, and ≥15 days post-symptom onset was 11, 28, and 14, respectively.

  • b The number of unique patients providing samples collected ≤7 and ≥15 days post-first positive RT-PCR result was 11 and 23, respectively.

  • c Overall specificity is 98% (95% CI, 95.3%–99.3%) if indeterminate results are counted as positive.

  • d Overall specificity is 97.2% (95% CI, 94.3%–98.8%) if indeterminate results are counted as positive.