Evidence map›Paper›PMID 33556328›Full record

ArticleThe Lancet. Public health2021

Seroprevalence and risk factors of exposure to COVID-19 in homeless people in Paris, France: a cross-sectional study.

Thomas Roederer, Bastien Mollo, Charline Vincent, Birgit Nikolay, Augusto E Llosa, Robin Nesbitt, Jessica Vanhomwegen, Thierry Rose, Sophie Goyard, François Anna and 6 more

Open access · goldAbstract read
In one paragraph

Article in The Lancet. Public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed, 4 pooled it
40.9field-weighted citation impact, top 1% of its field
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

72 citing papers in PubMed, 4 syntheses or guidelines pooled it, 145 citations in OpenAlex.

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors at 3 institutions in 1 country.

Thomas RoedererEpicentre, Paris, France. Electronic address: thomas.roederer@epicentre.msf.org.
Bastien MolloMédecins Sans Frontières, Paris, France.
Charline VincentMédecins Sans Frontières, Paris, France.
Birgit NikolayEpicentre, Paris, France.
Augusto E LlosaEpicentre, Paris, France.
Robin NesbittEpicentre, Paris, France.
Jessica VanhomwegenEnvironment and Infectious Risks Research and Expertise Unit, Global Health Department, Institut Pasteur, Paris, France.
Thierry RoseUnit of Lymphocyte Cell Biology, Immunology Department, Institut Pasteur, Paris, France.
Sophie GoyardUnit of Lymphocyte Cell Biology, Immunology Department, Institut Pasteur, Paris, France.
François AnnaUnit of Molecular Virology and Vaccinology, Virology Department, Institut Pasteur, Paris, France; Theravectys, Paris, France.
Corinne TorreMédecins Sans Frontières, Paris, France.
Emilie FourreyMédecins Sans Frontières, Paris, France.
Erica SimonsEpicentre, Paris, France.
William HennequinMédecins Sans Frontières, Paris, France.
Clair MillsMédecins Sans Frontières, Paris, France.
Francisco J LuqueroEpicentre, Paris, France.
Médecins Sans Frontières · FRInstitut Pasteur · FRTheravectys (France) · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDuring the COVID-19 lockdown period from March 17 to May 11, 2020, French authorities in Paris and its suburbs relocated people experiencing recurrent homelessness to emergency shelters, hotels, and large venues. A serological survey was done at some of these locations to assess the COVID-19 exposure prevalence in this group.

methodsWe did a cross-sectional seroprevalence study at food distribution sites, emergency shelters, and workers' residences that were provided medical services by Médecins Sans Frontières in Paris and Seine-Saint-Denis in the Ile-de-France region. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody seropositivity was detected by Luciferase-Linked Immunosorbent Assay and Pseudo Neutralization Test. Sociodemographic and exposure related information was collected via a verbal questionnaire to analyse risk factors and associations with various COVID-19 symptoms.

findingsBetween June 23 and July 2, 2020, 426 (52%) of 818 individuals recruited tested positive in 14 sites. Seroprevalence varied significantly by type of recruitment site (χ

interpretationThese results show high exposure to SARS-CoV-2 with important variations between those at different study sites. Living in crowded conditions was the strongest factor associated with exposure level. This study underscores the importance of providing safe, uncrowded accommodation, alongside adequate testing and public health information.

fundingMédecins Sans Frontières, Epicentre, Institut Pasteur's URGENCE nouveau coronavirus fund, Total Foundation.

Indexed as

AdultCOVID-19Cross-Sectional StudiesEnvironmental ExposureFemaleHumansIll-Housed PersonsMaleMiddle AgedParisRisk FactorsSeroepidemiologic Studies

Identifiers

PMID33556328
PMCPMC7993986
OpenAlexW3128674638

What OpenQuestion holds

Textmetadata
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.