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.
Original language | English |
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Article number | 100486 |
Journal | Cell Reports Medicine |
Volume | 3 |
Issue number | 1 |
Early online date | 2022 |
DOIs | |
Publication status | Published - 18 Jan 2022 |
Keywords
- Adult
- Aged
- Antibodies, Neutralizing/blood
- Antibodies, Viral/blood
- BNT162 Vaccine/administration & dosage
- BNT162b2
- COVID-19
- COVID-19/blood
- Female
- Follow-Up Studies
- Humans
- Immunogenicity, Vaccine/immunology
- Immunoglobulin G/blood
- Male
- Middle Aged
- Neutralization Tests
- Prospective Studies
- SARS-CoV-2
- SARS-CoV-2/immunology
- Severity of Illness Index
- Spike Glycoprotein, Coronavirus/immunology
- Treatment Outcome
- Vaccination/methods
- antibody response
- mRNA vaccine
- neutralization
- previous infection
- response predictors
- variants