Frontiers in Immunology (Jul 2023)

Impact of vaccine platform and BCG vaccination on antibody responses to COVID-19 vaccination

  • Nicole L. Messina,
  • Nicole L. Messina,
  • Mariana G. Sperotto,
  • Mariana G. Sperotto,
  • Marco A. M. Puga,
  • Marco A. M. Puga,
  • Patricia V. da Silva,
  • Patricia V. da Silva,
  • Roberto D. de Oliveira,
  • Roberto D. de Oliveira,
  • Cecilia L. Moore,
  • Laure F. Pittet,
  • Laure F. Pittet,
  • Laure F. Pittet,
  • Tenaya Jamieson,
  • Margareth Dalcolmo,
  • Margareth Dalcolmo,
  • Glauce dos Santos,
  • Bruno Jardim,
  • Marcus V. G. Lacerda,
  • Nigel Curtis,
  • Nigel Curtis,
  • Nigel Curtis,
  • Julio Croda,
  • Julio Croda,
  • Julio Croda

DOI
https://doi.org/10.3389/fimmu.2023.1172851
Journal volume & issue
Vol. 14

Abstract

Read online

Multiple factors, including vaccine platform and prior vaccinations, influence vaccine responses. We compared antibody responses to CoronaVac (Sinovac) and ChAdOx1-S (AstraZeneca-Oxford) vaccination in 874 healthcare workers in Brazil. As participants were randomised to BCG vaccination or placebo in the preceding 0-6 months as part of the BCG vaccination to reduce the impact of COVID-19 in healthcare workers (BRACE) trial, we also investigated the influence of recent BCG vaccination on antibody responses to these COVID-19 vaccines. Twenty-eight days after the second dose of each vaccine, ChAdOx1-S induced a stronger anti-spike IgG response than CoronaVac vaccination. Recent BCG vaccination did not impact IgG antibody responses to ChAdOx1-S or CoronaVac.

Keywords