Evidence map›Paper›PMID 33508989›Full record

SynthesisInfectious diseases (London, England)2021

A systematic review on the recurrence of SARS-CoV-2 virus: frequency, risk factors, and possible explanations.

Seyed Mohammad Piri, Maryam Edalatfar, Sina Shool, Mohammad Naser Jalalian, Soheil Tavakolpour

Abstract readSystematic Review
In one paragraph

Synthesis in Infectious diseases (London, England), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 4 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

19 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pathophysiological Mechanisms in Long COVID: A Mixed Method Systematic Review.International journal of environmental research and public health · 2024
    Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Safety and efficiency of COVID-19 vaccine in North Africa.Human vaccines & immunotherapeutics · 2024
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Epidemiology of COVID-19: What changed in one year?Turkish journal of medical sciences · 2021
    Review
  18. Review
  19. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Seyed Mohammad PiriSina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Maryam EdalatfarSina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Sina ShoolFaculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID 0000-0002-0280-3187
Mohammad Naser JalalianFaculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Soheil TavakolpourInfectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID 0000-0002-6765-8830

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSince late 2019, SARS-CoV-2 which leads to coronavirus disease 2019 (COVID-19), has caused thousands of deaths. There are some pieces of evidence that SARS-CoV-2 genome could be re-detectable in recovered patients.

methodsWe performed a systematic review in the PubMed/Medline database to address the risk of SARS-CoV-2 recurrence. The last update was for 20 November 2020. Among the 1178 initially found articles, 66 met the inclusion criteria and were considered.

findingsIn total, 1128 patients with at least one-time recurrence of SARS-CoV-2 were included. Recurrence rate has been reported between 2.3% and 21.4% in cohort studies, within a mean of 20 (ranged 1-98) days after discharge; younger patients are being affected more. Following the second course of disease, the disease severity decreased or remained unchanged in 97.3% while it increased in 2.6%. Anti-SARS-CoV-2 IgG and IgM were positive in 11-95% and 58.8-100%, respectively. Based on the literature, three possibilities include reactivation of previous disease, reinfection with the same virus, and false negative, which have been discussed in details.

conclusionThere is a relatively notable risk of disease recurrence in previously recovered patients, even those who are immunised against the virus. More studies are required to clarify the underlying cause of this phenomenon.

Indexed as

RecurrenceAntibodies, ViralCOVID-19COVID-19 Serological TestingHumansImmunoglobulin GImmunoglobulin MRisk FactorsAntibodies, ViralImmunoglobulin GImmunoglobulin MCoronavirusCOVID-19PCRrecurrenceSARS-CoV-2systematic review

Identifiers

PMID33508989
PMCPMC7852280

What OpenQuestion holds

Textmetadata
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.