Cited by 479Immune responses and vaccinationsTuberculosis Research and EpidemiologyImmunotherapy and Immune Responses

Non-specific effects of BCG vaccine on viral infections

Open access
Moorlag, S.J.C.F.M., Arts, R.J.W., van Crevel, R., Netea, M.G.·2019·Clinical Microbiology and Infection

Abstract

Background Some strains of Bacillus Calmette-Guérin (BCG) vaccine not only confer protection against disseminated forms of tuberculosis, but also reduce all-cause mortality by the induction of protection against infections with non-related pathogens.Objectives We review evidence for non-specific protection induced by BCG vaccination against viral infections, discuss possible mechanisms of action, and summarize implications for vaccination policies and vaccine discovery.Sources Relevant studies retrieved from PubMed and clinicaltrials.gov.Content Numerous epidemiological, clinical and immunological studies demonstrate that BCG vaccination impacts the immune response to subsequent infections, resulting in reduced morbidity and mortality. Important lines of evidence indicating that BCG protects against viral pathogens comes from experimental studies in mice showing that BCG offers protection against various DNA and RNA viruses, including herpes and influenza viruses. Recently, the effect of BCG on an experimental viral infection in humans has been demonstrated. These effects are thought to be mediated via the induction of innate immune memory and heterologous lymphocyte activation, resulting in enhanced cytokine production, macrophage activity, T-cell responses and antibody titres.Implications The discovery of innate immune memory has greatly improved our understanding of the mechanisms underlying the non-specific effects induced by BCG vaccination. However, a full understanding of the molecular mechanisms that underlie this phenomenon is still evolving. By identifying the factors that impact the non-specific effects of BCG, we will take an important step towards novel therapeutic options and vaccination strategies, which might lead to a reduction in severe morbidity and mortality associated with viral infections.

Integrity signals

Registry

Crossref · 10.1016/j.cmi.2019.04.020

Cites

55 of 55 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Moorlag, S. J. C. F. M., Arts, R. J. W., van Crevel, R., & Netea, M. G.
Affiliations
  • Radboud University Medical Center (NL)
  • University of Bonn (DE)
Corresponding author
Moorlag, S.J.C.F.M.
Venue
Clinical Microbiology and Infection
Publisher
Elsevier BV
Published
2019-12
Volume
25
Issue
12
Pages
1473-1478
ISSN
1198-743X (ISSN-L)
OpenAlex
W2943762716
Cited by
479
References
55
Citations by year
2026: 20 · 2025: 34 · 2024: 35 · 2023: 58 · 2022: 75 · 2021: 102 · 2020: 152 · 2019: 3
FWCI
7.16
Type
journal article
Language
en
Open access
Locations
  • Clinical Microbiology and Infection (publishedVersion)
  • PubMed (publishedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
Funders
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
BCG vaccine, non-specific vaccine effects, viral infection, heterologous immunity, trained immunity, herpesvirus, influenza virus, DNA viruses, RNA viruses, macrophage activation, T cell response, cytokine production, vaccination policy
MeSH terms
Animals, BCG Vaccine, Humans, Immunity, Innate, Immunologic Memory, Lymphocyte Activation, Virus Diseases, Cross Protection, Disease Resistance, Immunity, Heterologous

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review