{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T02:46:24Z","timestamp":1768704384842,"version":"3.49.0"},"reference-count":15,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2022,2,1]],"date-time":"2022-02-01T00:00:00Z","timestamp":1643673600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100003554","name":"Lundbeck Foundation","doi-asserted-by":"publisher","award":["R349-2020-731"],"award-info":[{"award-number":["R349-2020-731"]}],"id":[{"id":"10.13039\/501100003554","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,8,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>The purpose of this study was to assess whether influenza vaccination has an impact on the risk of coronavirus disease 2019 (COVID-19).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>A cohort of 46\u2005112 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.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>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\u20131.78, P\u2005=\u20051.00). Likewise, no clinical effect of influenza vaccination on development of antibodies against SARS-CoV-2 was found.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>The present findings indicate that influenza vaccination does not affect the risk of SARS-CoV-2 infection or COVID-19.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/infdis\/jiac001","type":"journal-article","created":{"date-parts":[[2022,1,4]],"date-time":"2022-01-04T12:07:16Z","timestamp":1641298036000},"page":"6-10","source":"Crossref","is-referenced-by-count":5,"title":["Effect of Influenza Vaccination on Risk of Coronavirus Disease 2019: A Prospective Cohort Study of 46\u2005000 Healthcare Workers"],"prefix":"10.1093","volume":"226","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2566-0502","authenticated-orcid":false,"given":"Jonas Henrik","family":"Kristensen","sequence":"first","affiliation":[{"name":"Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Emergency Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B , Copenhagen , Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rasmus","family":"Bo Hasselbalch","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Emergency Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B , Copenhagen , Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mia","family":"Pries-Heje","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9 , Copenhagen , Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B , Copenhagen , Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pernille Brok","family":"Nielsen","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Emergency Medicine, Copenhagen University Hospital, Herlev and Gentofte, Borgmester Ib Juuls vej 1 , Herlev , Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B , Copenhagen , Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas","family":"Dehlb\u00e6k Knudsen","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9 , Copenhagen , Denmark"},{"name":"Department of Infectious Disease, Copenhagen University Hospital - 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