Evidence map›Paper›PMID 33571105›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

The origin and early spread of SARS-CoV-2 in Europe.

Sarah A Nadeau, Timothy G Vaughan, Jérémie Scire, Jana S Huisman, Tanja Stadler

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

63 citing papers in PubMed, 1 synthesis or guideline pooled it.

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3 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Sarah A NadeauDepartment of Biosystems Science and Engineering, Eidgenössiche Technische Hochschule Zürich, 4058 Basel, Switzerland.ORCID 0000-0003-1008-8918
Timothy G VaughanDepartment of Biosystems Science and Engineering, Eidgenössiche Technische Hochschule Zürich, 4058 Basel, Switzerland.ORCID 0000-0001-6220-2239
Jérémie ScireDepartment of Biosystems Science and Engineering, Eidgenössiche Technische Hochschule Zürich, 4058 Basel, Switzerland.ORCID 0000-0003-0059-645X
Jana S HuismanDepartment of Biosystems Science and Engineering, Eidgenössiche Technische Hochschule Zürich, 4058 Basel, Switzerland.ORCID 0000-0002-1782-8109
Tanja StadlerDepartment of Biosystems Science and Engineering, Eidgenössiche Technische Hochschule Zürich, 4058 Basel, Switzerland; tanja.stadler@bsse.ethz.ch.ORCID 0000-0001-6431-535X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The investigation of migratory patterns during the SARS-CoV-2 pandemic before spring 2020 border closures in Europe is a crucial first step toward an in-depth evaluation of border closure policies. Here we analyze viral genome sequences using a phylodynamic model with geographic structure to estimate the origin and spread of SARS-CoV-2 in Europe prior to border closures. Based on SARS-CoV-2 genomes, we reconstruct a partial transmission tree of the early pandemic and coinfer the geographic location of ancestral lineages as well as the number of migration events into and between European regions. We find that the predominant lineage spreading in Europe during this time has a most recent common ancestor in Italy and was probably seeded by a transmission event in either Hubei, China or Germany. We do not find evidence for preferential migration paths from Hubei into different European regions or from each European region to the others. Sustained local transmission is first evident in Italy and then shortly thereafter in the other European regions considered. Before the first border closures in Europe, we estimate that the rate of occurrence of new cases from within-country transmission was within the bounds of the estimated rate of new cases from migration. In summary, our analysis offers a view on the early state of the epidemic in Europe and on migration patterns of the virus before border closures. This information will enable further study of the necessity and timeliness of border closures.

Indexed as

COVID-19EuropeGenome, ViralHumansPhylogeographySARS-CoV-2disease importphylogeographySARS-CoV-2transmission

Identifiers

PMID33571105
PMCPMC7936359

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.