1. Effect of Influenza Vaccination on Risk of Coronavirus Disease 2019: A Prospective Cohort Study of 46 000 Healthcare Workers
- Author
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Jonas Henrik Kristensen, Rasmus Bo Hasselbalch, Mia Pries-Heje, Pernille Brok Nielsen, Andreas Dehlbæk Knudsen, Kamille Fogh, Jakob Boesgaard Norsk, Aleksander Eiken, Ove Andersen, Thea Kølsen Fischer, Claus Antonio Juul Jensen, Christian Torp-Pedersen, Jørgen Rungby, Sisse Bolm Ditlev, Ida Hageman, Rasmus Møgelvang, Mikkel Gybel-Brask, Ram Benny Dessau, Erik Sørensen, Lene Harritshøj, Fredrik Folke, Maria Elizabeth Engel Møller, Thomas Benfield, Henrik Ullum, Charlotte Sværke Jørgensen, Sisse Rye Ostrowski, Susanne Dam Nielsen, Henning Bundgaard, and Kasper Iversen
- Subjects
Infectious Diseases ,virus diseases ,Immunology and Allergy - Abstract
Background The purpose of this study was to assess whether influenza vaccination has an impact on the risk of coronavirus disease 2019 (COVID-19). Methods A cohort of 46 112 healthcare workers were tested for antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and filled in a survey on COVID-19 symptoms, hospitalization, and influenza vaccination. Results The risk ratio of hospitalization due to SARS-CoV-2 for influenza vaccinated compared with unvaccinated participants was 1.00 for the seasonal vaccination in 2019/2020 (confidence interval, .56–1.78, P = 1.00). Likewise, no clinical effect of influenza vaccination on development of antibodies against SARS-CoV-2 was found. Conclusions The present findings indicate that influenza vaccination does not affect the risk of SARS-CoV-2 infection or COVID-19.
- Published
- 2022
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