“…We measured neutralizing Ab using an in-house pseudoneutralization assay and anti-N binding Ab using the Abbott Architect assay. RESULTS: Of 32 children enrolled between April 2020 and January 2021, 27 had no underlying immunocompromised state and 25 of these 27 children had symptomatic disease. …”
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“…METHODS: Pregnant people were screened for SARS-CoV-2 IgG during antenatal care or delivery in Seattle, Washington with Abbott Architect chemiluminescent immunoassay which provides quantitative index (positive ≥1.4). …”
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“…Baseline, 1, 2, 3, 6, and 12 months, and delivery samples were tested for anti-N (index ≥ 1.4 positive) and anti-S (≥ 50 AU/mL positive) IgG Ab by Abbott Architect. Kaplan-Meier methods were used to measure Ab response duration. …”
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“…Blood samples collected in pregnancy, delivery/birth, 0-< 3 and 3-6 months postpartum were tested for anti-S+ IgG by Abbott Architect (positive: ≥50 AU/mL) and neutralizing antibodies (serum dilution inhibited infection by 50% [ND50 heat] ≥20 and R(2) ≥0.9). …”
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