Evidence map›Paper›PMID 34204243›Full record

ArticlePathogens (Basel, Switzerland)2021

Investigation of Long COVID Prevalence and Its Relationship to Epstein-Barr Virus Reactivation.

Jeffrey E Gold, Ramazan A Okyay, Warren E Licht, David J Hurley

Abstract read
In one paragraph

Article in Pathogens (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 231 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
231citing papers in PubMed, 6 pooled it
–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

231 citing papers in PubMed, 6 syntheses or guidelines pooled it.

  1. Blood Biomarkers of Long COVID: A Systematic Review.Molecular diagnosis & therapy · 2024
    Pooled it
  2. Systematic review with meta-analysis of active herpesvirus infections in patients with COVID-19: Old players on the new field.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2023
    Pooled it
  3. Pooled it
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  6. Guideline
  7. Review
  8. Review
  9. Article
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  12. Review
  13. Relationships Among Maternal Epstein-Barr Virus Antibodies, COVID-19, and Stress in Mothers up to 1-Year Postpartum.American journal of human biology : the official journal of the Human Biology Council · 2026
    Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Epstein Barr viral shedding dynamics in saliva during acute SARS-CoV-2 infection.medRxiv : the preprint server for health sciences · 2026
    Article
  19. Article
  20. Article

171 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

4 authors.

Jeffrey E GoldWorld Organization, Watkinsville, GA 30677, USA.
Ramazan A OkyayDepartment of Public Health, Kahramanmaraş Sütçü İmam University, Kahramanmaraş 46040, Turkey.
Warren E LichtWarren Alpert Medical School of Brown University, Providence, RI 02903, USA.
David J HurleyCollege of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Coronavirus disease 2019 (COVID-19) patients sometimes experience long-term symptoms following resolution of acute disease, including fatigue, brain fog, and rashes. Collectively these have become known as long COVID. Our aim was to first determine long COVID prevalence in 185 randomly surveyed COVID-19 patients and, subsequently, to determine if there was an association between occurrence of long COVID symptoms and reactivation of Epstein-Barr virus (EBV) in 68 COVID-19 patients recruited from those surveyed. We found the prevalence of long COVID symptoms to be 30.3% (56/185), which included 4 initially asymptomatic COVID-19 patients who later developed long COVID symptoms. Next, we found that 66.7% (20/30) of long COVID subjects versus 10% (2/20) of control subjects in our primary study group were positive for EBV reactivation based on positive titers for EBV early antigen-diffuse (EA-D) IgG or EBV viral capsid antigen (VCA) IgM. The difference was significant (

Indexed as

chronic COVID syndromecoronavirusCOVID-19EBVEpstein–Barr virusEpstein–Barr virus reactivationlong COVIDPACSpost-acute COVID-19 syndromeSARS-CoV-2

Identifiers

PMID34204243
PMCPMC8233978

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.