Evidence map›Paper›PMID 41523194›Full record

ArticleBrain communications2026

Human herpesvirus 7 and the risk of developing multiple sclerosis.

Jens Ingvarsson, Viktor Grut, Rasmus Gustafsson, Martin Biström, Lea Lambert, Birgitta E Michels, Tomas Bergström, Louis Flamand, Tim Waterboer, Peter Sundström

Abstract read
In one paragraph

Article in Brain communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–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

2 citing papers in PubMed.

  1. Herpes simplex virus infection and Alzheimer's disease.Frontiers in aging neuroscience · 2026
    Review
  2. 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

10 authors.

Jens IngvarssonDepartment of Clinical Sciences, Neurosciences, Umeå University, Umeå 90187, Sweden.ORCID https://orcid.org/0009-0003-4261-9434
Viktor GrutDepartment of Clinical Sciences, Neurosciences, Umeå University, Umeå 90187, Sweden.ORCID https://orcid.org/0000-0002-5415-6567
Rasmus GustafssonDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm 17177, Sweden.
Martin BiströmDepartment of Clinical Sciences, Neurosciences, Umeå University, Umeå 90187, Sweden.
Lea LambertDepartment of Microbiology, Infectious Disease and Immunology, Faculty of Medicine, Laval University, Quebec City, QC G1V 0A6, Canada.
Birgitta E MichelsInfections and Cancer Epidemiology, German Cancer Research Center, Heidelberg 69120, Germany.
Tomas BergströmDepartment of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg 40530, Sweden.
Louis FlamandDepartment of Microbiology, Infectious Disease and Immunology, Faculty of Medicine, Laval University, Quebec City, QC G1V 0A6, Canada.
Tim WaterboerInfections and Cancer Epidemiology, German Cancer Research Center, Heidelberg 69120, Germany.
Peter SundströmDepartment of Clinical Sciences, Neurosciences, Umeå University, Umeå 90187, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Epstein-Barr virus is now regarded as the critical risk factor for multiple sclerosis. However, Cytomegalovirus and human herpesvirus 6A have also been associated with altered multiple sclerosis risk, suggesting a multifactorial aetiology. Here, we present the first large-scale study of the association between human herpesvirus 7 and the risk of developing multiple sclerosis. A nested case-control study was performed by crosslinking Swedish registries and biobanks, identifying blood samples from 981 cases who later developed multiple sclerosis and 1278 matched controls. Serological testing was performed with a multiplex immunoassay. The association between viral serostatus and the risk of developing multiple sclerosis was analysed with conditional logistic regression, calculating an odds ratio with 95% confidence interval. Interactions between antibodies against human herpesvirus 7 and the Epstein-Barr virus nuclear antigen 1 regarding multiple sclerosis risk were analysed on the additive scale. Serological evidence of human herpesvirus 7 infection was associated with a higher risk of developing multiple sclerosis: odds ratio = 2.2 (95% confidence interval = 1.8-2.7),

Indexed as

Epstein–Barr virushuman herpesvirus 7multiple sclerosisrisk factorsserology

Identifiers

PMID41523194
PMCPMC12782018

What OpenQuestion holds

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Registered trials

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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.