TABLE 4

Anti-SARS-CoV-2 IgG assay sensitivity in convalescent-phase sera and in individual patients tested ≥15 days post-symptom onset or first positive SARS-CoV-2 RT-PCR result

TABLE 4
  • a The 84 serum samples included 61 samples collected at least 15 days post-symptom onset from inpatients and 23 samples collected 20 days or more post-initial positive SARS-CoV-2 RT-PCR result in outpatients (see Table 3).

  • b The 37 individual patients included all 23 outpatients with sera collected 20 days or more post-initial positive SARS-CoV-2 RT-PCR result and 14 inpatients who had a serum sample collected 15 days or more post-symptom onset. Patients were counted as positive if at least one sample collected 15 days or more post-onset or first RT-PCR was positive.

  • c One patient was negative by the Euroimmun and Ortho-Clinical assays, and a second patient was negative by both the Epitope and Abbott assays. One and two patients, respectively, were indeterminate by the Euroimmun and Epitope assays but positive by all other assays.