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A comparison of COVID-19 incidence rates across six European countries in 2021
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View Affiliations Hide AffiliationsMichael Padgetmjpadget gmail.com
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COVID-19 Study Group members: Antonino Bella, Martina Del Manso, Daniele Petrone, Patrizio Pezzotti, Chiara Sacco, Annasara Carnahan, Anine Kongelf, Dieter Van CauterenView Citation Hide Citation
Citation style for this article: . A comparison of COVID-19 incidence rates across six European countries in 2021. Euro Surveill. 2023;28(40):pii=2300088. https://doi.org/10.2807/1560-7917.ES.2023.28.40.2300088 Received: 02 Feb 2023; Accepted: 26 Jun 2023
Abstract
International comparisons of COVID-19 incidence rates have helped gain insights into the characteristics of the disease, benchmark disease impact, shape public health measures and inform potential travel restrictions and border control measures. However, these comparisons may be biased by differences in COVID-19 surveillance systems and approaches to reporting in each country. To better understand these differences and their impact on incidence comparisons, we collected data on surveillance systems from six European countries: Belgium, England, France, Italy, Romania and Sweden. Data collected included: target testing populations, access to testing, case definitions, data entry and management and statistical approaches to incidence calculation. Average testing, incidence and contextual data were also collected. Data represented the surveillance systems as they were in mid-May 2021. Overall, important differences between surveillance systems were detected. Results showed wide variations in testing rates, access to free testing and the types of tests recorded in national databases, which may substantially limit incidence comparability. By systematically including testing information when comparing incidence rates, these comparisons may be greatly improved. New indicators incorporating testing or existing indicators such as death or hospitalisation will be important to improving international comparisons.
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