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Effectiveness of Whole-Virus COVID-19 Vaccine among Healthcare Personnel, Lima, Peru

  • Carmen Sofia Arriola
  • , Giselle Soto
  • , Matthew Westercamp
  • , Susan Bollinger
  • , Angelica Espinoza
  • , Max Grogl
  • , Alejandro Llanos-Cuentas
  • , Eduardo Matos
  • , Candice Romero
  • , Maria Silva
  • , Rachel Smith
  • , Natalie Olson
  • , Michael Prouty
  • , Eduardo Azziz-Baumgartner
  • , Fernanda C. Lessa
  • Centers for Disease Control and Prevention
  • NAMRID-Unit 3800
  • Hospital Nacional Cayetano Heredia
  • Arzobispo Loayza Hospital

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In February 2021, Peru launched a COVID-19 vaccination campaign among healthcare personnel using an inactivated whole-virus vaccine. The manufacturer recommended 2 vaccine doses 21 days apart. We evaluated vaccine effectiveness among an existing multiyear influenza vaccine cohort at 2 hospitals in Lima. We analyzed data on 290 participants followed during February-May 2021. Participants completed a baseline questionnaire and provided weekly self-collected nasal swab samples; samples were tested by real-time reverse transcription PCR. Median participant follow-up was 2 (range 1-11) weeks. We performed multivariable logistic regression and adjusted for preselected characteristics. During the study, 25 (9%) participants tested SARS-CoV-2-positive. We estimated adjusted vaccine effectiveness at 95% (95% CI 70%-99%) among fully vaccinated participants and 100% (95% CI 88%-100%) among partially vaccinated participants. These data can inform the use and acceptance of inactivated whole-virus vaccine and support vaccination efforts in the region.

Original languageEnglish
Pages (from-to)S238-S243
JournalEmerging Infectious Diseases
Volume28
Issue number13
DOIs
StatePublished - Dec 2022
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

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