Evidence map›Paper›PMID 34320400›Full record

ArticleCell reports2021

Development of safe and highly protective live-attenuated SARS-CoV-2 vaccine candidates by genome recoding.

Jakob Trimpert, Kristina Dietert, Theresa C Firsching, Nadine Ebert, Tran Thi Nhu Thao, Daria Vladimirova, Susanne Kaufer, Fabien Labroussaa, Azza Abdelgawad, Andelé Conradie and 8 more

Open access · goldAbstract read
In one paragraph

Article in Cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 5% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 71 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Broad beta-CoV immunity and transmission blockade by a single-dose live-attenuated vaccine with atypical codon usage.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  14. Viral Live-Attenuated Vaccines (LAVs): Past and Future Directions.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Review
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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

18 authors at 4 institutions in 3 countries.

Jakob TrimpertInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Kristina DietertInstitut für Tierpathologie, Freie Universität Berlin, Berlin, Germany; Tiermedizinisches Zentrum für Resistenzforschung, Freie Universität Berlin, Berlin, Germany.
Theresa C FirschingInstitut für Tierpathologie, Freie Universität Berlin, Berlin, Germany.
Nadine EbertInstitute of Virology and Immunology, Bern and Mittelhäusern, Switzerland; Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Tran Thi Nhu ThaoInstitute of Virology and Immunology, Bern and Mittelhäusern, Switzerland; Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland; Graduate School for Biomedical Science, University of Bern, Bern, Switzerland.
Daria VladimirovaInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Susanne KauferInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Fabien LabroussaaDepartment of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland; Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Azza AbdelgawadInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Andelé ConradieInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Thomas HöflerInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Julia M AdlerInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Luca D BertzbachInstitut für Virologie, Freie Universität Berlin, Berlin, Germany.
Joerg JoresDepartment of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland; Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Achim D GruberInstitut für Tierpathologie, Freie Universität Berlin, Berlin, Germany.
Volker ThielInstitute of Virology and Immunology, Bern and Mittelhäusern, Switzerland; Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Nikolaus OsterriederInstitut für Virologie, Freie Universität Berlin, Berlin, Germany; Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong.
Dusan KunecInstitut für Virologie, Freie Universität Berlin, Berlin, Germany. Electronic address: dusan.kunec@fu-berlin.de.
Freie Universität Berlin · DEUniversity of Bern · CHCity University of Hong Kong · HKFederal Department of Home Affairs · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Safe and effective vaccines are urgently needed to stop the pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We construct a series of live attenuated vaccine candidates by large-scale recoding of the SARS-CoV-2 genome and assess their safety and efficacy in Syrian hamsters. Animals were vaccinated with a single dose of the respective recoded virus and challenged 21 days later. Two of the tested viruses do not cause clinical symptoms but are highly immunogenic and induce strong protective immunity. Attenuated viruses replicate efficiently in the upper but not in the lower airways, causing only mild pulmonary histopathology. After challenge, hamsters develop no signs of disease and rapidly clear challenge virus: at no time could infectious virus be recovered from the lungs of infected animals. The ease with which attenuated virus candidates can be produced and administered favors their further development as vaccines to combat the ongoing pandemic.

Indexed as

COVID-19 VaccinesAnimalsChlorocebus aethiopsCOVID-19Gene EditingGenome, ViralHumansImmunityMesocricetusMutationPandemicsRespiratory SystemSARS-CoV-2Vaccines, AttenuatedVero CellsVirus ReplicationCOVID-19 VaccinesVaccines, Attenuatedcodon pair deoptimizationcoronavirusCOVID-19genome recodinglive attenuated vaccineRoborovski dwarf hamsterSARS-CoV-2synthetic attenuated virus engineeringSyrian hamster

Identifiers

PMID34320400
PMCPMC8289629
OpenAlexW3185503435

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.