npj Vaccines (Jul 2023)

Immunogenicity of NVX-CoV2373 heterologous boost against SARS-CoV-2 variants

  • Kirsten E. Lyke,
  • Robert L. Atmar,
  • Clara Dominguez Islas,
  • Christine M. Posavad,
  • Meagan E. Deming,
  • Angela R. Branche,
  • Christine Johnston,
  • Hana M. El Sahly,
  • Srilatha Edupuganti,
  • Mark J. Mulligan,
  • Lisa A. Jackson,
  • Richard E. Rupp,
  • Christina A. Rostad,
  • Rhea N. Coler,
  • Martín Bäcker,
  • Angelica C. Kottkamp,
  • Tara M. Babu,
  • David Dobrzynski,
  • Judith M. Martin,
  • Rebecca C. Brady,
  • Robert W. Frenck,
  • Kumaravel Rajakumar,
  • Karen Kotloff,
  • Nadine Rouphael,
  • Daniel Szydlo,
  • Rahul PaulChoudhury,
  • Janet I. Archer,
  • Sonja Crandon,
  • Brian Ingersoll,
  • Amanda Eaton,
  • Elizabeth R. Brown,
  • M. Juliana McElrath,
  • Kathleen M. Neuzil,
  • David S. Stephens,
  • Diane J. Post,
  • Bob C. Lin,
  • Leonid Serebryannyy,
  • John H. Beigel,
  • David C. Montefiori,
  • Paul C. Roberts,
  • the DMID 21-0012 Study Group

DOI
https://doi.org/10.1038/s41541-023-00693-z
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 10

Abstract

Read online

Abstract As part of a multicenter study evaluating homologous and heterologous COVID-19 booster vaccines, we assessed the magnitude, breadth, and short-term durability of binding and pseudovirus-neutralizing antibody (PsVNA) responses following a single booster dose of NVX-CoV2373 in adults primed with either Ad26.COV2.S, mRNA-1273, or BNT162b2 vaccines. NVX-CoV2373 as a heterologous booster was immunogenic and associated with no safety concerns through Day 91. Fold-rises in PsVNA titers from baseline (Day 1) to Day 29 were highest for prototypic D614G variant and lowest for more recent Omicron sub-lineages BQ.1.1 and XBB.1. Peak humoral responses against all SARS-CoV-2 variants were lower in those primed with Ad26.COV2.S than with mRNA vaccines. Prior SARS CoV-2 infection was associated with substantially higher baseline PsVNA titers, which remained elevated relative to previously uninfected participants through Day 91. These data support the use of heterologous protein-based booster vaccines as an acceptable alternative to mRNA or adenoviral-based COVID-19 booster vaccines. This trial was conducted under ClinicalTrials.gov: NCT04889209.