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Long-term assessment of anti-SARS-CoV-2 antibody levels post-pandemic: Tracking the dynamics after two, three, and four COVID-19 vaccine doses.
J Infect Public Health
January 2025
Clinical Research Department, Pasteur Institute of Iran, No 69, Pasteur Ave., Tehran, Iran. Electronic address:
Background: Given the limited available data about to the number of vaccine doses administered over an extended time in Iran, the immune status of vaccinated individuals and any potential disparities in this regard among those who received different numbers of vaccine doses remain unknown. Therefore, this study aimed to assess humoral immunity of individuals who received different doses of the COVID-19 vaccines in Iran.
Methods: This study was conducted from February, 2022 to December 2023 including 605 vaccinated subjects.
Serum Immunoglobulin G Levels and Nicastrin Variation in Hidradenitis Suppurativa.
JAMA Dermatol
January 2025
Centre for Molecular Medicine and Biobanking, University of Malta, Malta.
Importance: Variation in nicastrin (NCSTN) is associated with a monogenic subtype of hidradenitis suppurativa. Dysregulation of humoral immunity has been suggested as a potential mechanistic link between NCSTN variation and hidradenitis suppurativa. There is a paucity of biomarkers that can predict disease-associated variation.
View Article and Find Full Text PDFBiogenic silver nanoparticle as an adjuvant in an S1 subunit recombinant vaccine.
Braz J Microbiol
January 2025
Center of Technological Development, Biotechnology, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
Adjuvants are crucial for maintaining specific, protective, and long-lasting immunity. Here, we aimed to evaluate the antigenic and immunogenic activity of a recombinant form of the S1 domain of the Spike protein, associated with biogenic silver nanoparticles (bio-AgNP) and Alhydrogel as an alternative and conventional adjuvant, respectively, for a SARS-CoV-2 subunit vaccine. We produced and evaluated the antigenicity of the recombinant S1 (rS1) protein by testing its recognition by antibodies present in SARS-CoV-2 positive human serum.
View Article and Find Full Text PDFComparison of immune responses to SARS-CoV-2 spike following Omicron infection or Omicron BA.4/5 vaccination in kidney transplant recipients.
Front Immunol
January 2025
Institute of Virology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
Background: The emergence of novel SARS-CoV-2 variants challenges immunity, particularly among immunocompromised kidney transplant recipients (KTRs). To address this, vaccines have been adjusted to circulating variants. Despite intensive vaccination efforts, SARS-CoV-2 infections surged among KTRs during the Omicron wave, enabling a direct comparison of variant-specific immunity following-vaccination against Omicron BA.
View Article and Find Full Text PDFMechanistic models of humoral kinetics following COVID-19 vaccination.
J R Soc Interface
January 2025
Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield Grove, Bristol, BS8 2BN, UK.
COVID-19 vaccine programmes must account for variable immune responses and waning protection. Existing descriptions of antibody responses to COVID-19 vaccination convey limited information about the mechanisms of antibody production and maintenance. We describe antibody dynamics after COVID-19 vaccination with two biologically motivated mathematical models.
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