Evidence map›Paper›PMID 34278372›Full record

ArticleThe Lancet regional health. Europe2021

Impact of original, B.1.1.7, and B.1.351/P.1 SARS-CoV-2 lineages on vaccine effectiveness of two doses of COVID-19 mRNA vaccines: Results from a nationwide case-control study in France.

Tiffany Charmet, Laura Schaeffer, Rebecca Grant, Simon Galmiche, Olivia Chény, Cassandre Von Platen, Alexandra Maurizot, Alexandra Rogoff, Faïza Omar, Christophe David and 11 more

Abstract read
In one paragraph

Article in The Lancet regional health. Europe, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing 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

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

  1. Pooled it
  2. Article
  3. Observational
  4. Observational
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. SARS-CoV-2 self-test uptake and factors associated with self-testing during Omicron BA.1 and BA.2 waves in France, January to May 2022.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2023
    Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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

21 authors.

Tiffany CharmetInstitut Pasteur, Emerging Diseases Epidemiology Unit, Paris, France.
Laura SchaefferInstitut Pasteur, Emerging Diseases Epidemiology Unit, Paris, France.
Rebecca GrantInstitut Pasteur, Emerging Diseases Epidemiology Unit, Paris, France.
Simon GalmicheInstitut Pasteur, Emerging Diseases Epidemiology Unit, Paris, France.
Olivia ChényInstitut Pasteur, Centre for Translational Research, Paris, France.
Cassandre Von PlatenInstitut Pasteur, Centre for Translational Research, Paris, France.
Alexandra MaurizotCaisse Nationale d'Assurance Maladie, Paris, France.
Alexandra RogoffCaisse Nationale d'Assurance Maladie, Paris, France.
Faïza OmarInstitut IPSOS, Paris, France.
Christophe DavidInstitut IPSOS, Paris, France.
Alexandra SeptfonsSanté Publique France, Saint-Maurice, France.
Simon CauchemezInstitut Pasteur, Mathematical Modelling of Infectious Diseases Unit; UMR2000; CNRS, Paris, France.
Alexandre GaymardCNR des Virus des Infections Respiratoires, Institut des Agents Infectieux, Hospices Civils de Lyon.
Bruno LinaCNR des Virus des Infections Respiratoires, Institut des Agents Infectieux, Hospices Civils de Lyon.
Louise H LefrancoisMolecular Genetics of RNA Viruses, Department of Virology, Institut Pasteur CNRS UMR 3569; Université de Paris, Paris, France.
Vincent EnoufMolecular Genetics of RNA Viruses, Department of Virology, Institut Pasteur CNRS UMR 3569; Université de Paris, Paris, France.
Sylvie van der WerfMolecular Genetics of RNA Viruses, Department of Virology, Institut Pasteur CNRS UMR 3569; Université de Paris, Paris, France.
Alexandra MaillesSanté Publique France, Saint-Maurice, France.
Daniel Levy-BruhlSanté Publique France, Saint-Maurice, France.
Fabrice CarratSorbonne Université, Inserm, IPLESP, hôpital Saint-Antoine, APHP, 27 rue Chaligny, Paris F75571, France.
Arnaud FontanetInstitut Pasteur, Emerging Diseases Epidemiology Unit, Paris, France.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWe aimed to assess the effectiveness of two doses of mRNA COVID-19 vaccines against COVID-19 with the original virus and other lineages circulating in France.

methodsIn this nationwide case-control study, cases were SARS-CoV-2 infected adults with onset of symptoms between 14 February and 3 May 2021. Controls were non-infected adults from a national representative panel matched to cases by age, sex, region, population density and calendar week. Participants completed an online questionnaire on recent activity-related exposures and vaccination history. Information about the infecting virus was based on a screening RT-PCR for either B.1.1.7 or B.1.351/P.1 variants.

findingsIncluded in our analysis were 7 288 adults infected with the original SARS-CoV-2 virus, 31 313 with the B.1.1.7 lineage, 2 550 with B.1.351/P1 lineages, and 3 644 controls. In multivariable analysis, the vaccine effectiveness (95% confidence interval) seven days after the second dose of mRNA vaccine was estimated at 88% (81-92), 86% (81-90) and 77% (63-86) against COVID-19 with the original virus, the B.1.1.7 lineage, and the B.1.351/P.1 lineages, respectively. Recent (2 to 6 months) history of virologically confirmed SARS-CoV-2 infection was found to be 83% (76-88), 88% (85-91) and 83% (71-90) protective against COVID-19 with the original virus, the B.1.1.7 lineage, and the B.1.351/P.1 lineages, respectively; and more distant (> 6 months) infections were 76% (54-87), 84% (75-90), and 74% (41-89) protective against COVID-19 with the original virus, the B.1.1.7 lineage, and the B.1.351/P.1 lineages, respectively.

interpretationIn real-life settings, two doses of mRNA vaccines proved to be effective against COVID-19 with the original virus, B.1.1.7 lineage and B.1.351/P.1 lineages.

fundingInstitut Pasteur, Research & Action Emerging Infectious Diseases (REACTing), Fondation de France (Alliance "Tous unis contre le virus").

Indexed as

case-control studyCOVID-19epidemiologySARS-CoV-2 variantsVaccine effectiveness

Identifiers

PMID34278372
PMCPMC8277121

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.