SARS-CoV-2 Convalescent Sera Binding and Neutralizing Antibody Concentrations Compared with COVID-19 Vaccine Efficacy Estimates against Symptomatic Infection

被引：8

作者：

Schuh, Amy J. ^{[1
]}

Satheshkumar, Panayampalli S. ^{[1
]}

Dietz, Stephanie ^{[1
]}

Bull-Otterson, Lara ^{[1
]}

Charles, Myrna ^{[1
]}

Edens, Chris ^{[1
]}

Jones, Jefferson M. ^{[1
]}

Bajema, Kristina L. ^{[1
]}

Clarke, Kristie E. N. ^{[1
]}

McDonald, L. Clifford ^{[1
]}

Patel, Sadhna ^{[1
]}

Cuffe, Kendra ^{[1
]}

Thornburg, Natalie J. ^{[1
]}

Schiffer, Jarad ^{[1
]}

Chun, Kelly ^{[2
]}

Bastidas, Monique ^{[2
]}

Fernando, Manory ^{[2
]}

Petropoulos, Christos J. ^{[2
]}

Wrin, Terri ^{[2
]}

Cai, Suqin ^{[2
]}

Adcock, Dot ^{[2
]}

Sesok-Pizzini, Deborah ^{[2
]}

Letovsky, Stanley ^{[2
]}

Fry, Alicia M. ^{[1
]}

Hall, Aron J. ^{[1
]}

Gundlapalli, Adi V. ^{[1
]}

机构：

[1] US Ctr Dis Control & Prevent, CDC COVID 19 Response, Atlanta, GA 30329 USA

[2] Labcorp, Burlington, NC USA

来源：

MICROBIOLOGY SPECTRUM | 2022年 / 10卷 / 04期

关键词：

SARS-CoV-2; COVID-19; standardized; quantitative; anti-SARS-CoV-2; IgG; neutralizing antibodies; correlation; antibody; immune; protection; correlate of protection; immunity;

D O I：

10.1128/spectrum.01247-22

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Previous COVID-19 vaccine efficacy (VE) studies have estimated neutralizing and binding antibody concentrations that correlate with protection from symptomatic infection similar to how these estimates compare to those generated in response to SARS-CoV-2 infection is unclear. Here, we assessed quantitative neutralizing and binding antibody concentrations using standardized SARS-CoV-2 assays on 3,067 serum specimens collected during 27 July 2020 to 27 August 2020 from COVID-19-unvaccinated persons with detectable anti-SARS-CoV-2 antibodies. Neutralizing and binding antibody concentrations were several-fold lower in the unvaccinated study population compared to published concentrations at 28 days postvaccination. In this convenience sample, similar to 88% of neutralizing and similar to 63 to 86% of binding antibody concentrations met or exceeded concentrations associated with 70% COVID-19 VE against symptomatic infection similar to 30% of neutralizing and 1 to 14% of binding antibody concentrations met or exceeded concentrations associated with 90% COVID-19 VE. Our study not only supports observations of infection-induced immunity and current recommendations for vaccination postinfection to maximize protection against COVID-19, but also provides a large data set of pre-COVID-19 vaccination anti-SARS-CoV-2 antibody concentrations that will serve as an important comparator in the current setting of vaccine-induced and hybrid immunity. As new SARS-CoV-2 variants emerge and displace circulating virus strains, we recommend that standardized binding antibody assays that include spike protein-based antigens be utilized to estimate antibody concentrations correlated with protection from COVID-19. These estimates will be helpful in informing public health guidance, such as the need for additional COVID-19 vaccine booster doses to prevent symptomatic infection. IMPORTANCE Although COVID-19 vaccine efficacy (VE) studies have estimated antibody concentrations that correlate with protection from COVID-19, how these estimates compare to those generated in response to SARS-CoV-2 infection is unclear. We assessed quantitative neutralizing and binding antibody concentrations using standardized assays on serum specimens collected from COVID-19-unvaccinated persons with detectable antibodies. We found that most unvaccinated persons with qualitative antibody evidence of prior infection had quantitative antibody concentrations that met or exceeded concentrations associated with 70% VE against COVID-19. However, only a small proportion had antibody concentrations that met or exceeded concentrations associated with 90% VE, suggesting that persons with prior COVID-19 would benefit from vaccination to maximize protective antibody concentrations against COVID-19.

引用

页数：10

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