A single mRNA vaccine dose in COVID-19 patients boosts neutralizing antibodies against SARS-CoV-2 and variants of concern

Cell Rep Med. 2021 Dec 14;3(1):100486. doi: 10.1016/j.xcrm.2021.100486. eCollection 2022 Jan 18.

Abstract

The urgent need for, but limited availability of, SARS-CoV-2 vaccines worldwide has led to widespread consideration of dose-sparing strategies. Here, we evaluate the SARS-CoV-2-specific antibody responses following BNT162b2 vaccination in 150 previously SARS-CoV-2-infected individuals from a population-based cohort. One week after first vaccine dose, spike protein antibody levels are 27-fold higher and neutralizing antibody titers 12-fold higher, exceeding titers of fully vaccinated SARS-CoV-2-naive controls, with minimal additional boosting after the second dose. Neutralizing antibody titers against four variants of concern increase after vaccination; however, overall neutralization breadth does not improve. Pre-vaccination neutralizing antibody titers and time since infection have the largest positive effect on titers following vaccination. COVID-19 severity and the presence of comorbidities have no discernible impact on vaccine response. In conclusion, a single dose of BNT162b2 vaccine up to 15 months after SARS-CoV-2 infection offers higher neutralizing antibody titers than 2 vaccine doses in SARS-CoV-2-naive individuals.

Keywords: BNT162b2; COVID-19; SARS-CoV-2; antibody response; mRNA vaccine; neutralization; previous infection; response predictors; variants.

MeSH terms

  • Adult
  • Aged
  • Antibodies, Neutralizing / blood
  • Antibodies, Neutralizing / immunology*
  • Antibodies, Viral / blood
  • Antibodies, Viral / immunology*
  • BNT162 Vaccine / administration & dosage*
  • BNT162 Vaccine / immunology*
  • COVID-19 / blood
  • COVID-19 / immunology*
  • COVID-19 / prevention & control*
  • COVID-19 / virology
  • Female
  • Follow-Up Studies
  • Humans
  • Immunogenicity, Vaccine / immunology*
  • Immunoglobulin G / blood
  • Immunoglobulin G / immunology
  • Male
  • Middle Aged
  • Neutralization Tests
  • Prospective Studies
  • SARS-CoV-2 / immunology*
  • Severity of Illness Index
  • Spike Glycoprotein, Coronavirus / immunology
  • Treatment Outcome
  • Vaccination / methods*

Substances

  • Antibodies, Neutralizing
  • Antibodies, Viral
  • Immunoglobulin G
  • Spike Glycoprotein, Coronavirus
  • spike protein, SARS-CoV-2
  • BNT162 Vaccine

Supplementary concepts

  • SARS-CoV-2 variants