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. 2021 Dec;93(12):6813-6817.
doi: 10.1002/jmv.27231. Epub 2021 Aug 5.

The dynamics of quantitative SARS-CoV-2 antispike IgG response to BNT162b2 vaccination

Shun Kaneko  1 , Masayuki Kurosaki  1 , Toru Sugiyama  2 , Yuka Takahashi  3 , Yoshimi Yamaguchi  4 , Masayuki Nagasawa  5 , Namiki Izumi  1
Affiliations

The dynamics of quantitative SARS-CoV-2 antispike IgG response to BNT162b2 vaccination

Shun Kaneko et al. J Med Virol. 2021 Dec.

Abstract

Vaccination for SARS-CoV-2 is necessary to overcome coronavirus disease 2019 (COVID-19). However, the time-dependent vaccine-induced immune response is not well understood. This study aimed to investigate the dynamics of SARS-CoV-2 antispike immunoglobulin G (IgG) response. Medical staff participants who received two sequential doses of the BNT162b2 vaccination on days 0 and 21 were recruited prospectively from the Musashino Red Cross Hospital between March and May 2021. The quantitative antispike receptor-binding domain (RBD) IgG antibody responses were measured using the Abbott SARS-CoV-2 IgGII Quant assay (cut off ≥50 AU/ml). A total of 59 participants without past COVID-19 history were continuously tracked with serum samples. The median age was 41 (22-75) years, and 14 participants were male (23.7%). The median antispike RBD IgG and seropositivity rates were 0 (0-31.1) AU/ml, 0.3 (0-39.5) AU/ml, 529.1 (48.3-8711.4) AU/ml, 18,836.9 (742.2-57,260.4) AU/ml, and 0%, 0%, 98.3%, and 100% on days 0, 3, 14, and 28 after the first vaccination, respectively. The antispike RBD IgG levels were significantly increased after day 14 from vaccination (p < 0.001) The BNT162b2 vaccination led almost all participants to obtain serum antispike RBD IgG 14 days after the first dose.

Keywords: COVID-19; SARS-Cov-2; mRNA vaccine; quantitative antispike RBD IgG.

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Conflict of interest statement

The authors declare that there are no conflict of interests.

Figures

Figure 1
Figure 1
Dynamics of SARS‐CoV‐2 antispike RBD IgG response after vaccination. (A) Schema of the schedule for vaccination and blood test. (B) Antispike RBD IgG titer (AU/ml) and seropositive rate of antispike RBD IgG and antinucleocapsid IgG in a time‐dependent manner. RBD, receptor‐binding domain
See this image and copyright information in PMC

References

    1. Guan WJ, Ni ZY, Hu Y, et al. Clinical characteristics of coronavirus disease 2019 in China. N Engl J Med. 2020;382(18):1708‐1720. - PMC - PubMed
    1. Zhou F, Yu T, Du R, et al. Clinical course and risk factors for mortality of adult inpatients with COVID‐19 in Wuhan, China: a retrospective cohort study. Lancet. 2020;395(10229):1054‐1062. - PMC - PubMed
    1. Zheng Z, Peng F, Xu B, et al. Risk factors of critical & mortal COVID‐19 cases: a systematic literature review and meta‐analysis. J Infect. 2020;81:16. - PMC - PubMed
    1. Hu Y, Sun J, Dai Z, et al. Prevalence and severity of corona virus disease 2019 (COVID‐19): a systematic review and meta‐analysis. J Clin Virol. 2020;127:104371. - PMC - PubMed
    1. World Health Organization . Coronavirus disease (COVID‐19). Situation report. Accessed, May 17th, 2021.https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situatio...