Reactogenicity to the mRNA-1273 Booster According to Previous mRNA COVID-19 Vaccination

Oleguer Pares Badell, Ricardo Zules-Oña, L.l. Armadans, Laia Pinós Tella, Blanca Borras Bermejo, Susana Isabel Otero Romero, Jose Angel Rodrigo Pendas, Martí Vivet-Escalé, Yolima Cossio-Gil, M. Antonieta Agusti Escasany, Cristina Aguilera Martin, Magdalena Campins Marti, Javier Martinez Gomez*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

The objective of this study was to assess the local and systemic adverse reactions after the administration of a COVID-19 mRNA-1273 booster between December 2021 and February 2022 by comparing the type of mRNA vaccine used as primary series (mRNA-1273 or BNT162b2) and homologous versus heterologous booster in health care workers (HCW). A cross-sectional study was performed in HCW at a tertiary hospital in Barcelona, Spain. A total of 17% of booster recipients responded to the questionnaire. The frequency of reactogenicity after the mRNA-1273 booster (88.5%) was similar to the mRNA-1273 primary doses (85.8%), and higher than the BNT162b2 primary doses (71.1%). The reactogenicity was similar after receiving a heterologous booster compared to a homologous booster (88.0% vs. 90.2%, p = 0.3), and no statistically significant differences were identified in any local or systemic reactions. A higher frequency of medical leave was identified in the homologous booster dose group vs. the heterologous booster dose group (AOR 1.45; 95% CI: 1.00–2.07; p = 0.045). Our findings could be helpful in improving vaccine confidence toward heterologous combinations in the general population and in health care workers.
Original languageEnglish
Number of pages10
JournalVaccines
Volume10
Issue number8
DOIs
Publication statusPublished - 29 Jul 2022

Keywords

  • SARS-CoV-2
  • COVID-19-vaccination
  • Booster dose
  • mRNA vaccines
  • Adverse reactions
  • Health care workers

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