Article (Scientific journals)
Follow-Up of SARS-CoV-2 Antibody Levels in Belgian Nursing Home Residents and Staff Two, Four and Six Months after Primary Course BNT162b2 Vaccination.
Meyers, Eline; De Rop, Liselore; Engels, Fien et al.
2024In Vaccines, 12 (8), p. 951
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Keywords :
COVID-19 vaccination; SARS-CoV-2 antibodies; nursing home residents; nursing home staff; Immunology; Pharmacology; Drug Discovery; Infectious Diseases; Pharmacology (medical)
Abstract :
[en] When COVID-19 vaccines were implemented, nursing home residents (NHRs) and staff (NHS) in Belgium were prioritized for vaccination. To characterize the vaccine response over time in this population and to identify poorly responding groups, we assessed antibody concentrations two (T1), four (T2) and six months (T3) after primary course BNT162b2 vaccination in six groups of infection-naive/infection-primed NHRs/NHS, with/without comorbidity (NHRs only). Participant groups (N = 125 per group) were defined within a national serosurveillance study in nursing homes, based on questionnaire data. Dried blood spots were analyzed using ELISA for the quantification of SARS-CoV-2 S1RBD IgG antibodies. Among all groups, antibody concentrations significantly decreased between T1 and T2/T3, all with a ≥70% decrease at T3, except for infection-primed staff (-32%). Antibody concentrations among infection-naive NHRs were 11.96 times lower than those among infection-primed NHR, while the latter were comparable (x1.05) to infection-primed NHS. The largest proportion [13% (95% CI: 11-24%)] of vaccine non-responders was observed in the group of infection-naive NHRs with comorbidities. A longer interval between infection and vaccination (≥3 months) elicited higher antibody responses. Our data retrospectively show the necessity of timely COVID-19 booster vaccination. Infection-naive NHRs require special attention regarding immune monitoring in future epidemics or pandemics.
Disciplines :
Immunology & infectious disease
Author, co-author :
Meyers, Eline ;  Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
De Rop, Liselore ;  EPI-Centre, Department of Public Health and Primary Care, KU Leuven, 3000 Leuven, Belgium
Engels, Fien;  Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Gioveni, Claudia;  Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Coen, Anja;  Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
De Burghgraeve, Tine;  EPI-Centre, Department of Public Health and Primary Care, KU Leuven, 3000 Leuven, Belgium
Di Gregorio, Marina  ;  Université de Liège - ULiège > Soins primaires et santé
Van Ngoc, Pauline  ;  Université de Liège - ULiège > Département des sciences cliniques > Médecine générale
De Clercq, Nele;  Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Buret, Laetitia  ;  Université de Liège - ULiège > Département des sciences cliniques > Médecine générale
Coenen, Samuel ;  Department of Family Medicine & Population Health, Faculty of Medicine and Health Sciences, University of Antwerp, 2000 Antwerp, Belgium
Deschepper, Ellen;  Biostatistics Unit, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Padalko, Elizaveta;  Laboratory of Medical Microbiology, Ghent University Hospital, 9000 Ghent, Belgium
Callens, Steven ;  Department of Internal Medicine & Infectious Diseases, Ghent University Hospital, 9000 Ghent, Belgium
Duysburgh, Els;  Department of Epidemiology and Public Health, Sciensano, 1000 Brussels, Belgium
De Sutter, An;  Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Scholtes, Béatrice  ;  Université de Liège - ULiège > Département des sciences cliniques > Médecine générale
Verbakel, Jan Y ;  EPI-Centre, Department of Public Health and Primary Care, KU Leuven, 3000 Leuven, Belgium
Heytens, Stefan ;  Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
Cools, Piet ;  Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
More authors (10 more) Less
Language :
English
Title :
Follow-Up of SARS-CoV-2 Antibody Levels in Belgian Nursing Home Residents and Staff Two, Four and Six Months after Primary Course BNT162b2 Vaccination.
Publication date :
22 August 2024
Journal title :
Vaccines
ISSN :
2076-393X
Publisher :
MDPI, Switzerland
Volume :
12
Issue :
8
Pages :
951
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Sciensano
UZ Gent - Ghent University Hospital
FWO - Research Foundation Flanders
Funding text :
This study was funded by Sciensano (SC_045), Ghent University Hospital COVID-19 foundation (KW/2011/CIZ/005/001) and the Research Foundation Flanders (1SDN2524N).
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since 10 April 2025

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