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Open AccessArticle

Prevalence of SARS-CoV-2 IgG/IgM Antibodies among Danish and Swedish Falck Emergency and Non-Emergency Healthcare Workers

1
Department of Global Business Quality Management, Falck, Sydhavnsgade 18, 2450 Copenhagen, Denmark
2
Center for Clinical Research and Prevention, Copenhagen University Hospital, Bispebjerg and Frederiksberg, Bispebjerg Bakke 23, 2400 Copenhagen, Denmark
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Section of Biostatistics, Department of Public Health, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen, Denmark
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Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
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Department of Emergency Medicine and Department of Cardiology, Copenhagen University Hospital, Herlev-Gentofte, Borgmester Ib Juuls Vej 1, 2730 Herlev, Denmark
*
Authors to whom correspondence should be addressed.
Academic Editor: Paul B. Tchounwou
Int. J. Environ. Res. Public Health 2021, 18(3), 923; https://doi.org/10.3390/ijerph18030923
Received: 5 January 2021 / Revised: 19 January 2021 / Accepted: 20 January 2021 / Published: 21 January 2021
(This article belongs to the Section Infectious Disease Epidemiology)
Background: Knowledge about the COVID-19 outbreak is still sparse, especially in a cross-national setting. COVID-19 is caused by a SARS-CoV-2 infection. The aim of the study is to contribute to the surveillance of the pandemic by bringing new knowledge about SARS-CoV-2 seropositivity among healthcare workers. It seeks to evaluate whether certain job functions are associated with a higher risk of being infected and to clarify if such association is mediated by the number of individuals that employees meet during a workday. In addition, we investigate regional and national differences in seroprevalence. Methods: This research involved a bi-national prospective observational cohort study including 3272 adults employed at Falck in Sweden and Denmark. Participants were tested for SARS-CoV-2 antibodies every second week for a period of 8 weeks from 22 June 2020 until 10 August 2020. Descriptive statistics as well as multivariable logistic regression analyses were applied. Results: Of the 3272 Falck employees participating in this study, 159 (4.9%) tested positive for SARS-CoV-2 antibodies. The seroprevalence was lower among Danish Falck employees than among those from Sweden (2.8% in Denmark and 8.3% in Sweden). We also found that the number of customer or patient contacts during a workday was the most prominent predictor for seropositivity and that ambulance staff was the most vulnerable staff group. Conclusion: Our study presents geographical variations in seroprevalence within the Falck organization and shows evidence that social interaction is one of the biggest risk factors for becoming infected with SARS-CoV-2. View Full-Text
Keywords: COVID-19; epidemiology; communicable/infectious diseases; employee health; healthcare worker/homecare worker COVID-19; epidemiology; communicable/infectious diseases; employee health; healthcare worker/homecare worker
MDPI and ACS Style

Laursen, J.; Petersen, J.; Didriksen, M.; Iversen, K.; Ullum, H. Prevalence of SARS-CoV-2 IgG/IgM Antibodies among Danish and Swedish Falck Emergency and Non-Emergency Healthcare Workers. Int. J. Environ. Res. Public Health 2021, 18, 923. https://doi.org/10.3390/ijerph18030923

AMA Style

Laursen J, Petersen J, Didriksen M, Iversen K, Ullum H. Prevalence of SARS-CoV-2 IgG/IgM Antibodies among Danish and Swedish Falck Emergency and Non-Emergency Healthcare Workers. International Journal of Environmental Research and Public Health. 2021; 18(3):923. https://doi.org/10.3390/ijerph18030923

Chicago/Turabian Style

Laursen, Jannie; Petersen, Janne; Didriksen, Maria; Iversen, Kasper; Ullum, Henrik. 2021. "Prevalence of SARS-CoV-2 IgG/IgM Antibodies among Danish and Swedish Falck Emergency and Non-Emergency Healthcare Workers" Int. J. Environ. Res. Public Health 18, no. 3: 923. https://doi.org/10.3390/ijerph18030923

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