Evidence map›Paper›PMID 34039296›Full record

ArticleBMC infectious diseases2021

Transmission dynamics and control of two epidemic waves of SARS-CoV-2 in South Korea.

Sukhyun Ryu, Sheikh Taslim Ali, Eunbi Noh, Dasom Kim, Eric H Y Lau, Benjamin J Cowling

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in BMC infectious diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
4.3field-weighted citation impact, top 5% 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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it, 48 citations in OpenAlex.

  1. Pooled it
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  5. A novel approach to estimatingFrontiers in public health · 2025
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  18. Clinical outcomes of remdesivir-treated COVID-19 patients in South Korea.Osong public health and research perspectives · 2022
    Article
  19. Article
  20. Evolution of Responses to COVID-19 and Epidemiological Characteristics in South Korea.International journal of environmental research and public health · 2022
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 3 countries.

Sukhyun RyuDepartment of Preventive Medicine, Konyang University College of Medicine, Daejeon, 35365, Republic of Korea. gentryu@onehealth.or.kr.
Sheikh Taslim AliWHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Special Administrative Region, China.
Eunbi NohDepartment of Preventive Medicine, Konyang University College of Medicine, Daejeon, 35365, Republic of Korea.
Dasom KimDepartment of Preventive Medicine, Konyang University College of Medicine, Daejeon, 35365, Republic of Korea.
Eric H Y LauWHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Special Administrative Region, China.
Benjamin J CowlingWHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Special Administrative Region, China.
Konyang University · KRHong Kong Science and Technology Parks Corporation · CNLaboratory of Data Discovery for HealthUniversity of Hong Kong · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAfter relaxing social distancing measures, South Korea experienced a resurgent second epidemic wave of coronavirus disease 2019 (COVID-19). In this study, we aimed to identify the transmission dynamics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections and assess the impact of COVID-19 case finding and contact tracing in each epidemic wave.

methodsWe collected data on COVID-19 cases published by local public health authorities in South Korea and divided the study into two epidemic periods (19 January-19 April 2020 for the first epidemic wave and 20 April-11 August 2020 for the second epidemic wave). To identify changes in the transmissibility of SARS-CoV-2, the daily effective reproductive number (R

resultsIn early May 2020, within 2-weeks of a relaxation in strict social distancing measures, R

conclusionsOur study shows that relaxing social distancing measures was associated with increased SARS-CoV-2 transmission despite rigorous case findings in South Korea. Along with social distancing measures, the enhanced contact tracing including asymptomatic cases could be an efficient approach to control further epidemic waves.

Indexed as

SARS-CoV-2AdolescentAdultAgedAged, 80 and overBasic Reproduction NumberChildCluster AnalysisCommunicable Disease ControlCOVID-19EpidemicsFemaleHumansMaleMiddle AgedRepublic of KoreaCOVID-19EpidemiologySARS-CoV-2Social distancing measureTransmission

Identifiers

PMID34039296
PMCPMC8154110
OpenAlexW3164817115

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.