Prevalence of RT-qPCR-detected SARS-CoV-2 infection at schools: First results from the Austrian School-SARS-CoV-2 prospective cohort study

The role of schools in the SARS-CoV-2 pandemic is much debated. We aimed to quantify reliably the prevalence of SARS-CoV-2 infections at schools detected with reverse-transcription quantitative polymerase-chain-reaction (RT-qPCR). This nationwide prospective cohort study monitors a representative sa...

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Published in:The Lancet regional health. Europe 2021-06, Vol.5, p.100086, Article 100086
Main Authors: Willeit, Peter, Krause, Robert, Lamprecht, Bernd, Berghold, Andrea, Hanson, Buck, Stelzl, Evelyn, Stoiber, Heribert, Zuber, Johannes, Heinen, Robert, Köhler, Alwin, Bernhard, David, Borena, Wegene, Doppler, Christian, von Laer, Dorothee, Schmidt, Hannes, Pröll, Johannes, Steinmetz, Ivo, Wagner, Michael
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container_title The Lancet regional health. Europe
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creator Willeit, Peter
Krause, Robert
Lamprecht, Bernd
Berghold, Andrea
Hanson, Buck
Stelzl, Evelyn
Stoiber, Heribert
Zuber, Johannes
Heinen, Robert
Köhler, Alwin
Bernhard, David
Borena, Wegene
Doppler, Christian
von Laer, Dorothee
Schmidt, Hannes
Pröll, Johannes
Steinmetz, Ivo
Wagner, Michael
description The role of schools in the SARS-CoV-2 pandemic is much debated. We aimed to quantify reliably the prevalence of SARS-CoV-2 infections at schools detected with reverse-transcription quantitative polymerase-chain-reaction (RT-qPCR). This nationwide prospective cohort study monitors a representative sample of pupils (grade 1–8) and teachers at Austrian schools throughout the school year 2020/2021. We repeatedly test participants for SARS-CoV-2 infection using a gargling solution and RT-qPCR. We herein report on the first two rounds of examinations. We used mixed-effects logistic regression to estimate odds ratios and robust 95% confidence intervals (95% CI). We analysed data on 10,734 participants from 245 schools (9465 pupils, 1269 teachers). Prevalence of SARS-CoV-2 infection increased from 0·39% at round 1 (95% CI 028–0·55%, 28 September-22 October 2020) to 1·39% at round 2 (95% CI 1·04–1·85%, 10–16 November). Odds ratios for SARS-CoV-2 infection were 2·26 (95% CI 1·25–4·12, P = 0·007) in regions with >500 vs. ≤500 inhabitants/km2, 1·67 (95% CI 1·42–1·97, P
doi_str_mv 10.1016/j.lanepe.2021.100086
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We aimed to quantify reliably the prevalence of SARS-CoV-2 infections at schools detected with reverse-transcription quantitative polymerase-chain-reaction (RT-qPCR). This nationwide prospective cohort study monitors a representative sample of pupils (grade 1–8) and teachers at Austrian schools throughout the school year 2020/2021. We repeatedly test participants for SARS-CoV-2 infection using a gargling solution and RT-qPCR. We herein report on the first two rounds of examinations. We used mixed-effects logistic regression to estimate odds ratios and robust 95% confidence intervals (95% CI). We analysed data on 10,734 participants from 245 schools (9465 pupils, 1269 teachers). Prevalence of SARS-CoV-2 infection increased from 0·39% at round 1 (95% CI 028–0·55%, 28 September-22 October 2020) to 1·39% at round 2 (95% CI 1·04–1·85%, 10–16 November). Odds ratios for SARS-CoV-2 infection were 2·26 (95% CI 1·25–4·12, P = 0·007) in regions with &gt;500 vs. ≤500 inhabitants/km2, 1·67 (95% CI 1·42–1·97, P&lt;0·001) per two-fold higher regional 7-day community incidence, and 2·78 (95% CI 1·73–4·48, P&lt;0·001) in pupils at schools with high/very high vs. low/moderate social deprivation. Associations of regional community incidence and social deprivation persisted in a multivariable adjusted model. Prevalence did not differ by average number of pupils per class nor between age groups, sexes, pupils vs. teachers, or primary (grade 1–4) vs. secondary schools (grade 5–8). This monitoring study in Austrian schools revealed SARS-CoV-2 infection in 0·39%-1·39% of participants and identified associations of regional community incidence and social deprivation with higher prevalence. 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title Prevalence of RT-qPCR-detected SARS-CoV-2 infection at schools: First results from the Austrian School-SARS-CoV-2 prospective cohort study
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