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Endemic human coronavirus anti-S IgG antibody signals pre- and post-vaccination. HCoV antibody signals in n = 21 paired participants, who received a COVID-19 vaccine during the study, measured at baseline (be-fore vaccination) and 14 to 56 days post-vaccination, presented by HCoV species: (A) HCoV-229E anti-Spike (S), (B) HCoV-HKU1 anti-S, (C) HCoV-NL63 anti-S, (D) HCoV-OC43 anti-S. Difference in antibody signal was examined with a paired Wilcoxon signed rank test.
