Humoral anti-SARS-CoV-2 immune response for different strains after Sinovac-CoronaVac and Oxford/AstraZeneca (ChAdOx1-S) full vaccination on a healthcare population in Brazil
DOI:
https://doi.org/10.46311/2318-0579.61.eUJ4570Keywords:
ChAdOx1 nCoV-19, CoronaVac, COVID-19 vaccines, neutralizing antibodies, SARS-CoV-2.Abstract
COVID-19, caused by the SARS-CoV-2 virus, is a global respiratory syndrome with high mortality rates. Vaccination is currently the only proven method to prevent the disease, although the role of lab data in assessing efficacy remains uncertain. This study aimed to assess spike-binding and neutralizing antibody levels following full vaccination with Oxford/AstraZeneca (ChAdOx1 nCoV-19) or CoronaVac in healthcare workers in southeastern Brazil. ChAdOx1 nCoV-19 and CoronaVac induced IgG antibodies against trimeric spike glycoproteins in 99.5% and 80.9% of individuals, respectively. Neutralizing antibodies were produced against two viral strains groups: variants group 1 (Wuhan-Hu-1, Alpha) and variants group 2 (Beta, Gamma) with neutralization rates of 88.3% and 78.2% for ChAdOx1 nCoV-19, and 68.1% and 48.9% for CoronaVac. No associations were found between neutralizing levels and comorbidities, age, or side effects. A positive correlation was observed between IgG antibody concentrations against trimeric spike glycoproteins and neutralizing levels for both vaccines and variants. These findings indicate that both vaccines induced reasonable levels of neutralizing antibodies against variants group 1, but only ChAdOx1 nCoV-19 maintained acceptable levels against a variant strain. The study suggests that evaluating vaccine responses to different pathogen strains can aid in managing healthcare workforce concerns and improve vaccine selection, thereby enhancing overall vaccination strategies.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 Revista Uningá
This work is licensed under a Creative Commons Attribution 4.0 International License.
I declare/we declare that the text submitted here is original, of my own authorship and does not infringe any type of third party rights. The content is my/our sole responsibility. Possible research involving animals and/or human beings is in accordance with Resolution 196/96 of the National Health Council and its complements. I declare that I am/we are in possession of the written consent of patients and that the research and its procedures were timely and adequately approved by the Ethics Committee of the institution of origin. We further declare that all institutional affiliations and all sources of financial support for the work are duly informed. I certify that there is no commercial or associative interest that represents a conflict of interest related to the submitted work. If there is commercial interest, in addition to the technical and academic ones, in the publication of the article, the information will be reported during the text.
