Outcomes of COVID-19 Infection in People Previously Vaccinated Against Influenza: Population-Based Cohort Study Using Primary Health Care Electronic Records.

Maria Giner-Soriano Vanessa de Dios Dan Ouchi Carles Vilaplana-Carnerero Mònica Monteagudo Rosa Morros-Pedros

Published in: JMIR public health and surveillance (2022)

We could not establish a protective role of the immunity conferred by the influenza vaccine on the outcomes of COVID-19 infection, as the risk of COVID-19 complications was higher in vaccinated than in unvaccinated individuals. Our results correspond to the first wave of the COVID-19 pandemic, where more complications and mortalities due to COVID-19 had occurred. Despite that, our study adds more evidence for the analysis of a possible link between the quality of immunity and COVID-19 outcomes, particularly in the PHC setting.

Keyphrases

coronavirus disease
sars cov
risk factors
type diabetes
metabolic syndrome