Evidence map›Paper›PMID 34580856›Full record

ArticleEuropean journal of immunology2021

Persistence of neutralizing antibodies a year after SARS-CoV-2 infection in humans.

Anu Haveri, Nina Ekström, Anna Solastie, Camilla Virta, Pamela Österlund, Elina Isosaari, Hanna Nohynek, Arto A Palmu, Merit Melin

Open access · hybridAbstract read
In one paragraph

Article in European journal of immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed, 2 pooled it
5.9field-weighted citation impact, top 3% 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

70 citing papers in PubMed, 2 syntheses or guidelines pooled it, 97 citations in OpenAlex.

  1. Dynamics of SARS-CoV-2 seroassay sensitivity: a systematic review and modelling study.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2023
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10 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

9 authors at 1 institution in 2 countries.

Anu HaveriDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.ORCID 0000-0003-4620-7536
Nina EkströmDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.ORCID 0000-0003-2220-9027
Anna SolastieDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.
Camilla VirtaDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.
Pamela ÖsterlundDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.
Elina IsosaariDepartment of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, Finland.
Hanna NohynekDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.
Arto A PalmuDepartment of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, Finland.
Merit MelinDepartment of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland.
Finnish Institute for Health and Welfare · FI

Funding

Finnish Institute for Health and Welfare and the Academy of Finland 336431
6 · The paper itself

Abstract

Most subjects develop antibodies to SARS-CoV-2 following infection. In order to estimate the duration of immunity induced by SARS-CoV-2 it is important to understand for how long antibodies persist after infection in humans. Here, we assessed the persistence of serum antibodies following WT SARS-CoV-2 infection at 8 and 13 months after diagnosis in 367 individuals. The SARS-CoV-2 spike IgG (S-IgG) and nucleoprotein IgG (N-IgG) concentrations and the proportion of subjects with neutralizing antibodies (NAb) were assessed. Moreover, the NAb titers among a smaller subset of participants (n = 78) against a WT virus (B) and variants of concern (VOCs): Alpha (B.1.1.7), Beta (B.1.351), and Delta (B.1.617.2) were determined. We found that NAb against the WT virus persisted in 89% and S-IgG in 97% of subjects for at least 13 months after infection. Only 36% had N-IgG by 13 months. The mean S-IgG concentrations declined from 8 to 13 months by less than one third; N-IgG concentrations declined by two-thirds. Subjects with severe infection had markedly higher IgG and NAb levels and are expected to remain seropositive for longer. Significantly lower NAb titers against the variants compared to the WT virus, especially after a mild disease, suggests reduced protection against VOCs.

Indexed as

AdolescentAdultAgedAntibodies, NeutralizingAntibodies, ViralCohort StudiesCoronavirus Nucleocapsid ProteinsCOVID-19FemaleFinlandHumansImmunoglobulin GMaleMiddle AgedSARS-CoV-2Seroepidemiologic StudiesAntibodies, NeutralizingAntibodies, ViralCoronavirus Nucleocapsid ProteinsImmunoglobulin GSpike Glycoprotein, CoronavirusIgG antibodiesneutralizing antibodiesSARS-CoV-2seroprevalencevariants of concern

Identifiers

PMID34580856
PMCPMC8646652
OpenAlexW3203460516

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.