Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling

Abstract The UK and Sweden have among the worst per-capita COVID-19 mortality in Europe. Sweden stands out for its greater reliance on voluntary, rather than mandatory, control measures. We explore how the timing and effectiveness of control measures in the UK, Sweden and Denmark shaped COVID-19 mor...

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Autores principales: Swapnil Mishra, James A. Scott, Daniel J. Laydon, Seth Flaxman, Axel Gandy, Thomas A. Mellan, H. Juliette T. Unwin, Michaela Vollmer, Helen Coupland, Oliver Ratmann, Melodie Monod, Harrison H. Zhu, Anne Cori, Katy A. M. Gaythorpe, Lilith K. Whittles, Charles Whittaker, Christl A. Donnelly, Neil M. Ferguson, Samir Bhatt
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/a7909190430045a9bb3b5a995db32e9e
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spelling oai:doaj.org-article:a7909190430045a9bb3b5a995db32e9e2021-12-02T16:28:00ZComparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling10.1038/s41598-021-95699-92045-2322https://doaj.org/article/a7909190430045a9bb3b5a995db32e9e2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95699-9https://doaj.org/toc/2045-2322Abstract The UK and Sweden have among the worst per-capita COVID-19 mortality in Europe. Sweden stands out for its greater reliance on voluntary, rather than mandatory, control measures. We explore how the timing and effectiveness of control measures in the UK, Sweden and Denmark shaped COVID-19 mortality in each country, using a counterfactual assessment: what would the impact have been, had each country adopted the others’ policies? Using a Bayesian semi-mechanistic model without prior assumptions on the mechanism or effectiveness of interventions, we estimate the time-varying reproduction number for the UK, Sweden and Denmark from daily mortality data. We use two approaches to evaluate counterfactuals which transpose the transmission profile from one country onto another, in each country’s first wave from 13th March (when stringent interventions began) until 1st July 2020. UK mortality would have approximately doubled had Swedish policy been adopted, while Swedish mortality would have more than halved had Sweden adopted UK or Danish strategies. Danish policies were most effective, although differences between the UK and Denmark were significant for one counterfactual approach only. Our analysis shows that small changes in the timing or effectiveness of interventions have disproportionately large effects on total mortality within a rapidly growing epidemic.Swapnil MishraJames A. ScottDaniel J. LaydonSeth FlaxmanAxel GandyThomas A. MellanH. Juliette T. UnwinMichaela VollmerHelen CouplandOliver RatmannMelodie MonodHarrison H. ZhuAnne CoriKaty A. M. GaythorpeLilith K. WhittlesCharles WhittakerChristl A. DonnellyNeil M. FergusonSamir BhattNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Swapnil Mishra
James A. Scott
Daniel J. Laydon
Seth Flaxman
Axel Gandy
Thomas A. Mellan
H. Juliette T. Unwin
Michaela Vollmer
Helen Coupland
Oliver Ratmann
Melodie Monod
Harrison H. Zhu
Anne Cori
Katy A. M. Gaythorpe
Lilith K. Whittles
Charles Whittaker
Christl A. Donnelly
Neil M. Ferguson
Samir Bhatt
Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
description Abstract The UK and Sweden have among the worst per-capita COVID-19 mortality in Europe. Sweden stands out for its greater reliance on voluntary, rather than mandatory, control measures. We explore how the timing and effectiveness of control measures in the UK, Sweden and Denmark shaped COVID-19 mortality in each country, using a counterfactual assessment: what would the impact have been, had each country adopted the others’ policies? Using a Bayesian semi-mechanistic model without prior assumptions on the mechanism or effectiveness of interventions, we estimate the time-varying reproduction number for the UK, Sweden and Denmark from daily mortality data. We use two approaches to evaluate counterfactuals which transpose the transmission profile from one country onto another, in each country’s first wave from 13th March (when stringent interventions began) until 1st July 2020. UK mortality would have approximately doubled had Swedish policy been adopted, while Swedish mortality would have more than halved had Sweden adopted UK or Danish strategies. Danish policies were most effective, although differences between the UK and Denmark were significant for one counterfactual approach only. Our analysis shows that small changes in the timing or effectiveness of interventions have disproportionately large effects on total mortality within a rapidly growing epidemic.
format article
author Swapnil Mishra
James A. Scott
Daniel J. Laydon
Seth Flaxman
Axel Gandy
Thomas A. Mellan
H. Juliette T. Unwin
Michaela Vollmer
Helen Coupland
Oliver Ratmann
Melodie Monod
Harrison H. Zhu
Anne Cori
Katy A. M. Gaythorpe
Lilith K. Whittles
Charles Whittaker
Christl A. Donnelly
Neil M. Ferguson
Samir Bhatt
author_facet Swapnil Mishra
James A. Scott
Daniel J. Laydon
Seth Flaxman
Axel Gandy
Thomas A. Mellan
H. Juliette T. Unwin
Michaela Vollmer
Helen Coupland
Oliver Ratmann
Melodie Monod
Harrison H. Zhu
Anne Cori
Katy A. M. Gaythorpe
Lilith K. Whittles
Charles Whittaker
Christl A. Donnelly
Neil M. Ferguson
Samir Bhatt
author_sort Swapnil Mishra
title Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
title_short Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
title_full Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
title_fullStr Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
title_full_unstemmed Comparing the responses of the UK, Sweden and Denmark to COVID-19 using counterfactual modelling
title_sort comparing the responses of the uk, sweden and denmark to covid-19 using counterfactual modelling
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/a7909190430045a9bb3b5a995db32e9e
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