Immunogenicity of the BNT162b2 mRNA Covid-19 vaccine in elderly people over 85 years of age in Greece: the GREVAXIMO study

Background Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy. Aim The aim of this study was to provide useful insight into the antibody generation taking place post-immunization i...

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Published inAging clinical and experimental research Vol. 33; no. 12; pp. 3385 - 3389
Main Authors Kontopoulou, Konstantina, Nakas, Christos Theodore, Ainatzoglou, Alexandra, Ifantidou, Athina, Ntotsi, Paschalina, Katsioulis, Christos, Papazisis, Georgios
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.12.2021
Springer Nature B.V
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ISSN1720-8319
1594-0667
1720-8319
DOI10.1007/s40520-021-01997-7

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Abstract Background Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy. Aim The aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85. Methods In the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25–74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85–100) post-second dose. Results Overall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high. Conclusion Taken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.
AbstractList BackgroundElderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy.AimThe aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85.MethodsIn the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25–74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85–100) post-second dose.ResultsOverall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high.ConclusionTaken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.
Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy. The aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85. In the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25-74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85-100) post-second dose. Overall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high. Taken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.
Background Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy. Aim The aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85. Methods In the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25–74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85–100) post-second dose. Results Overall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high. Conclusion Taken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.
Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy.BACKGROUNDElderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority assignment policy.The aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85.AIMThe aim of this study was to provide useful insight into the antibody generation taking place post-immunization in elderly individuals aged over 85.In the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25-74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85-100) post-second dose.METHODSIn the first phase of our study, antibody levels were monitored in a total of 400 participants, while our final sample consisted of 297 subjects. Humoral immune responses were recorded in 69.75% (95% CI 65.25-74.25) of vaccinees post-first dose and in 98.99% (95% CI 97.85-100) post-second dose.Overall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high.RESULTSOverall, a remarkable 40-fold change in IgG levels was observed between the two doses. Subjects displaying low antibody levels after the first dose had significantly higher IgG fold changes than vaccinees whose initial antibody levels were high.Taken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.CONCLUSIONTaken together, our findings highlighted the high fold change (41.18) recorded in the titers of neutralizing antibodies after the second dose suggesting the need for its timely administration to elderly individuals.
Author Katsioulis, Christos
Kontopoulou, Konstantina
Nakas, Christos Theodore
Ntotsi, Paschalina
Papazisis, Georgios
Ainatzoglou, Alexandra
Ifantidou, Athina
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Issue 12
Keywords Greece
Antibodies
Elderly over age 85
SARS-CoV-2
Immunogenicity
BNT162b2 mRNA Covid-19 vaccine
Language English
License 2021. The Author(s), under exclusive licence to Springer Nature Switzerland AG.
This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
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  ident: 1997_CR6
  publication-title: SSRN Electron J
  doi: 10.2139/ssrn.3800040
SSID ssj0041319
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Snippet Background Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national...
Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority...
BackgroundElderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national...
Elderly people aged over 85 years were among the first groups to receive the BNT162b2 mRNA Covid-19 vaccine in Greece according to the national priority...
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proquest
pubmed
crossref
springer
SourceType Open Access Repository
Aggregation Database
Index Database
Enrichment Source
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StartPage 3385
SubjectTerms Aged
Antibodies
BNT162 Vaccine
Coronaviruses
COVID-19
COVID-19 Vaccines
Geriatrics/Gerontology
Greece
Humans
Medicine
Medicine & Public Health
Older people
RNA, Messenger
SARS-CoV-2
Short Communication
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Title Immunogenicity of the BNT162b2 mRNA Covid-19 vaccine in elderly people over 85 years of age in Greece: the GREVAXIMO study
URI https://link.springer.com/article/10.1007/s40520-021-01997-7
https://www.ncbi.nlm.nih.gov/pubmed/34633648
https://www.proquest.com/docview/2609525364
https://www.proquest.com/docview/2580933062
https://pubmed.ncbi.nlm.nih.gov/PMC8502633
Volume 33
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