Changes in serum-neutralizing antibody potency and breadth post-SARS-CoV-2 mRNA vaccine boost
- Columbia Univ., New York, NY (United States). Vagelos College of Physicians and Surgeons
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
A better understanding of the durability and breadth of serum-neutralizing antibody responses against multiple severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants elicited by COVID-19 vaccines is crucial in addressing the current pandemic. In this study, we quantified the decay of serum neutralization antibodies (nAbs) after second and third doses of the original COVID-19 mRNA vaccine. Using an authentic virus-neutralization assay, we found that decay half-lives of WA1- and Delta-nAbs were both ~60 days after second and third vaccine dose. Unexpectedly, the durability of serum antibodies that neutralize three different Omicron subvariants (BA.1.1, BA.5, BA.2.12.1) was substantially better, with half-lives of ≥6 months. A booster dose of the original COVID-19 vaccine was also found to broaden antibody responses against SARS-CoV and four other sarbecoviruses, in addition to multiple SARS-CoV-2 strains. These findings suggest that repeated vaccinations with the COVID-19 vaccine may confer a degree of protection against future spillover of sarbecoviruses from animal reservoirs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- Bill and Melinda Gates Foundation; Brii Biosciences; JPB Foundation; National Institute of Allergy and Infectious Diseases (NIAID); National Institutes of Health (NIH); USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1961384
- Report Number(s):
- LA-UR-22-32667
- Journal Information:
- iScience, Journal Name: iScience Journal Issue: 4 Vol. 26; ISSN 2589-0042
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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