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In a limited number of cases, the test results are “inconclusive”. For children and young people below 18 years of age, the SSI informs by phone if the test results are positive. Furthermore, at sundhed.dk, it is now possible to check the results for any children you may have below 15 years of age. Test results are also sent to the citizen’s GP. The citizen him- or herself checks the results via sundhed.dk. Guidance and interpretation of the test results The invitation letter also contains a link to an electronic questionnaire which, among others, asks participants if they have experienced symptoms of airway infection, and if any symptoms persist. According to the SSI’s internal evaluation, the test has a minimum sensitivity of 97% and a specificity of 99.5%, and it is currently considered the best test on the market. The blood sample is transported to the SSI and tested in the laboratory using an ELISA test (Wantai), which detects total immunoglobin against SARS-CoV-2. Citizens for whom the invitation to participate in the prevalence study coincides with initiation of COVID-19 vaccination are recommended not to participate they may simply ignore the invitation.Ĭitizens who want to participate may schedule an appointment to have a blood sample taken at a test station. COVID-19 vaccinated citizensĬitizens who have already been vaccinated will not be invited as they presumably already have antibodies. The letter includes an offer to schedule an antibody test at one of TestCenter Denmark’s (community track) test stations.

In the course of weeks to come, Statens Serum Institut (SSI) will send an invitation letter to the citizens selected. Thus, the study will, in principle, be representative for the entire Danish population above the age of 12. You need to be residing in Denmark and be 12 years of age or more to be selected.

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Citizens are selected at random from the Civil Registration Register (CPR). Previously, in 2020, another three rounds were completed, EPI-NEWS 37/20. The study is conducted in collaboration with TestCenter Denmark. Practical aspects of the prevalence study To the extent this is possible from the data material, the objective also is to describe the prevalence of the infection regionally and in selected population groups, including different age groups. The objective of the prevalence study is to continuously generate data describing how large a share of the population has become infected with COVID-19, with and without symptoms. The citizens will be invited by mail (either via e-Boks or by paper letter), and will be offered to have antibodies against COVID-19 virus (SARS-CoV-2) measured from a blood sample and to answer a questionnaire on any symptoms they may have. 48,000 citizens will be selected at random for participation in the prevalence study.

In the course of the next four weeks (9-12), approx. Updated 16 April 2021 The fourth round of the national COVID-19 prevalence study has just been launched The fourth round of the national COVID-19 prevalence study has just been launched.