Evidence map›Paper›PMID 34257967›Full record

ArticleClinical & translational immunology2021

SARS-CoV-2-specific humoral and cellular immunity persists through 9 months irrespective of COVID-19 severity at hospitalisation.

John Tyler Sandberg, Renata Varnaitė, Wanda Christ, Puran Chen, Jagadeeswara R Muvva, Kimia T Maleki, Marina García, Majda Dzidic, Elin Folkesson, Magdalena Skagerberg and 15 more

Open access · goldAbstract read
In one paragraph

Article in Clinical & translational immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
2.9field-weighted citation impact, top 7% 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

29 citing papers in PubMed, 45 citations in OpenAlex.

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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

25 authors at 2 institutions in 1 country.

John Tyler SandbergDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0001-6747-6933
Renata VarnaitėDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0001-9391-9291
Wanda ChristDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0003-3886-5248
Puran ChenDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Jagadeeswara R MuvvaDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Kimia T MalekiDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Marina GarcíaDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0002-9130-3933
Majda DzidicDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Elin FolkessonDepartment of Infectious Diseases Karolinska University Hospital Stockholm Sweden.
Magdalena SkagerbergDepartment of Infectious Diseases Karolinska University Hospital Stockholm Sweden.
Gustaf AhlénDivision of Clinical Microbiology, Department of Laboratory Medicine Karolinska Institutet Stockholm Sweden.
Lars FrelinDivision of Clinical Microbiology, Department of Laboratory Medicine Karolinska Institutet Stockholm Sweden.
Matti SällbergDivision of Clinical Microbiology, Department of Laboratory Medicine Karolinska Institutet Stockholm Sweden.
Lars I ErikssonFunction Perioperative Medicine and Intensive Care Karolinska University Hospital Stockholm Sweden.
Olav RooyackersFunction Perioperative Medicine and Intensive Care Karolinska University Hospital Stockholm Sweden.
Anders SönnerborgDepartment of Infectious Diseases Karolinska University Hospital Stockholm Sweden.
Marcus BuggertDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Niklas K BjörkströmDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Soo AlemanDepartment of Infectious Diseases Karolinska University Hospital Stockholm Sweden.
Kristoffer StrålinDepartment of Infectious Diseases Karolinska University Hospital Stockholm Sweden.
Jonas KlingströmDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0001-9076-1441
Hans-Gustaf LjunggrenDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Kim BlomDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.ORCID https://orcid.org/0000-0002-5286-3735
Sara Gredmark-RussDepartment of Medicine Huddinge, Center for Infectious Medicine Karolinska Institutet Stockholm Sweden.
Karolinska COVID‐19 Study Group
Karolinska Institutet · SEKarolinska University Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesHumoral and cellular immunity to SARS-CoV-2 following COVID-19 will likely contribute to protection from reinfection or severe disease. It is therefore important to characterise the initiation and persistence of adaptive immunity to SARS-CoV-2 amidst the ongoing pandemic.

methodsHere, we conducted a longitudinal study on hospitalised moderate and severe COVID-19 patients from the acute phase of disease into convalescence at 5 and 9 months post-symptom onset. Utilising flow cytometry, serological assays as well as B cell and T cell FluoroSpot assays, we assessed the magnitude and specificity of humoral and cellular immune responses during and after human SARS-CoV-2 infection.

resultsDuring acute COVID-19, we observed an increase in germinal centre activity, a substantial expansion of antibody-secreting cells and the generation of SARS-CoV-2-neutralising antibodies. Despite gradually decreasing antibody levels, we show persistent, neutralising antibody titres as well as robust specific memory B cell responses and polyfunctional T cell responses at 5 and 9 months after symptom onset in both moderate and severe COVID-19 patients.

conclusionOur findings describe the initiation and, importantly, persistence of cellular and humoral SARS-CoV-2-specific immunological memory in hospitalised COVID-19 patients long after recovery, likely contributing towards protection against reinfection.

Indexed as

antibodiesantibody‐secreting cellscirculating T follicular helper cellsCOVID‐19germinal centresSARS‐CoV‐2

Identifiers

PMID34257967
PMCPMC8256672
OpenAlexW3181793587

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.