Evidence map›Paper›PMID 34296675›Full record

ArticleEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin2021

Decline of influenza and respiratory syncytial virus detection in facility-based surveillance during the COVID-19 pandemic, South Africa, January to October 2020.

Stefano Tempia, Sibongile Walaza, Jinal N Bhiman, Meredith L McMorrow, Jocelyn Moyes, Thulisa Mkhencele, Susan Meiring, Vanessa Quan, Kate Bishop, Johanna M McAnerney and 14 more

Open access · diamondAbstract read
In one paragraph

Article in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed, 1 pooled it
20.0field-weighted citation impact, top 1% 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

92 citing papers in PubMed, 1 synthesis or guideline pooled it, 153 citations in OpenAlex.

  1. Pooled it
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  5. Shifts in epidemic patterns and age dynamics of RSV, IFV, and SARS-CoV-2 in Chinese children following COVID-19 non-pharmaceutical intervention relaxation, 2017 - 2024.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026
    Observational
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  14. Respiratory virus circulation during pandemic: Why were some viruses still circulating?Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2025
    Review
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32 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

24 authors at 8 institutions in 2 countries.

Stefano TempiaInfluenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States.
Sibongile WalazaSchool of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
Jinal N BhimanCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Meredith L McMorrowInfluenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States.
Jocelyn MoyesSchool of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
Thulisa MkhenceleCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Susan MeiringDivision of Public Health Surveillance and Response, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Vanessa QuanDivision of Public Health Surveillance and Response, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Kate BishopDivision of Public Health Surveillance and Response, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Johanna M McAnerneyCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Anne von GottbergCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Nicole WolterCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Mignon Du PlessisCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Florette K TreurnichtCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Orienka HellfersceeCentre for Respiratory Diseases and Meningitis, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa.
Halima DawoodDepartment of Medicine, Greys Hospital, Pietermaritzburg, South Africa.
Fathima NabyDepartment of Paediatrics, Pietermaritzburg Metropolitan Hospital, Pietermaritzburg, South Africa.
Ebrahim VariavaDepartment of Medicine, Klerksdorp-Tshepong Hospital Complex, Klerksdorp, South Africa.
Comfort SiweleDepartment of Paediatrics, Matikwana Hospital, Mkhuhlu, South Africa.
Neydis BauteDepartment of Paediatrics, Mapulaneng Hospital, Bushbuckridge, South Africa.
Jeremy NelDepartment of Medicine, Helen Joseph Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa.
Gary ReubensonDepartment of Paediatrics and Child Health, Rahima Moosa Mother and Child Hospital, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg South Africa.
Heather J ZarDepartment of Paediatrics & Child Health, Red Cross War Memorial Children's Hospital, University of Cape Town, Cape Town, South Africa.
Cheryl CohenSchool of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
National Health Laboratory Service · ZAUniversity of the Witwatersrand · ZACenters for Disease Control and Prevention · USChris Hani Baragwanath Hospital · ZAEdendale Hospital · ZAGrey's Hospital · ZAHelen Joseph Hospital · ZAUniversity of Cape Town · ZA

Funding

South African Preparedness for Rapid Detection of Highly Pathogenic Avian InfluenU51IP000155 · IP · NATIONAL INST FOR COMMUNICABLE DISEASES · PI VENTER, MARIETJIE · 2007 to 2010
$6.7M
Medical Research Council MR/V028782/1NCIRD CDC HHS U51 IP000155
6 · The paper itself

Abstract

BackgroundIn South Africa, COVID-19 control measures to prevent SARS-CoV-2 spread were initiated on 16 March 2020. Such measures may also impact the spread of other pathogens, including influenza virus and respiratory syncytial virus (RSV) with implications for future annual epidemics and expectations for the subsequent northern hemisphere winter.MethodsWe assessed the detection of influenza and RSV through facility-based syndromic surveillance of adults and children with mild or severe respiratory illness in South Africa from January to October 2020, and compared this with surveillance data from 2013 to 2019.ResultsFacility-based surveillance revealed a decline in influenza virus detection during the regular season compared with previous years. This was observed throughout the implementation of COVID-19 control measures. RSV detection decreased soon after the most stringent COVID-19 control measures commenced; however, an increase in RSV detection was observed after the typical season, following the re-opening of schools and the easing of measures.ConclusionCOVID-19 non-pharmaceutical interventions led to reduced circulation of influenza and RSV in South Africa. This has limited the country's ability to provide influenza virus strains for the selection of the annual influenza vaccine. Delayed increases in RSV case numbers may reflect the easing of COVID-19 control measures. An increase in influenza virus detection was not observed, suggesting that the measures may have impacted the two pathogens differently. The impact that lowered and/or delayed influenza and RSV circulation in 2020 will have on the intensity and severity of subsequent annual epidemics is unknown and warrants close monitoring.

Indexed as

COVID-19Influenza, HumanInfluenza VaccinesRespiratory Syncytial Virus, HumanRespiratory Syncytial Virus InfectionsAdultChildHumansPandemicsSARS-CoV-2South AfricaInfluenza VaccinesCOVID-19influenzainfluenza-like illnessrespiratory syncytial virussevere respiratory illness

Identifiers

PMID34296675
PMCPMC8299743
OpenAlexW3185412397

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.