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. 2021 Nov 17;9(3):e01131-21. doi: 10.1128/Spectrum.01131-21

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Copyright © 2021 Solastie et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 4 — Spearman correlation (ρ) and significance (p) between FMIA IgG and EIA IgG and total anti-spike Ig antibodies in binding antibody units (BAU/mL) calibrated against the WHO international standard. Dashed lines mark thresholds for positivity per antigen. One point may represent multiple samples (n = 80). S1, SARS-CoV-2 spike glycoprotein S1 subunit; RBD, receptor binding domain of SARS-CoV-2 (Wuhan-Hu-1) spike glycoprotein; SFL, full-length spike glycoprotein of SARS-CoV-2 (Wuhan-Hu-1); N, SARS-CoV-2 nucleoprotein of SARS-CoV-2 (Wuhan-Hu-1).