Evidence map›Paper›PMID 33250561›Full record

ReviewBuilding and environment2021

Crowding has consequences: Prevention and management of COVID-19 in informal urban settlements.

Lorenz von Seidlein, Graham Alabaster, Jacqueline Deen, Jakob Knudsen

Abstract readReview
In one paragraph

Review in Building and environment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
–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

42 citing papers in PubMed.

  1. Trial
  2. Beyond COVID-19: Behavioral Drivers of Pandemic Prevention in Ghana's Informal Urban Settlements.Journal of urban health : bulletin of the New York Academy of Medicine · 2026
    Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Age, gender and household infrastructural inequality in COVID-19: Contextual analysis of Mamelodi.South African family practice : official journal of the South African Academy of Family Practice/Primary Care · 2024
    Article
  8. Assessing the mental health of slum dwellers: an ordinal logistic approach.Journal of health, population, and nutrition · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. COVID-19-related hospital admission in spouses of partners in at-risk occupations.Scandinavian journal of work, environment & health · 2023
    Article
  14. Article
  15. Epidemic dynamics in census-calibrated modular contact network.Network modeling and analysis in health informatics and bioinformatics · 2023
    Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article
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.

Lorenz von SeidleinMahidol Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand.
Graham AlabasterUnited Nations Human Settlements Programme (UNHABITAT), Nairobi, Kenya.
Jacqueline DeenInstitute of Child Health and Human Development, National Institute of Health, University of the Philippines-Manila, Philippines.
Jakob KnudsenSchool of Architecture, The Royal Danish Academy of Fine Arts, Copenhagen, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

COVID-19 spreads via aerosols, droplets, fomites and faeces. The built environment that facilitates crowding increases exposure and hence transmission of COVID-19 as evidenced by outbreaks in both cool-dry and hot-humid climates, such as in the US prison system and dormitories in Singapore, respectively. This paper explores how the built environment influences crowding and COVID-19 transmission, focusing on informal urban settlements (slums). We propose policy and practice changes that could reduce COVID-19 transmission. There are several issues on how COVID-19 affects informal urban settlements. Slum populations tend to be younger than the overall population. Lower numbers of older people lessen the morbidity and mortality of the pandemic in slum areas. Second, many slum populations are highly mobile. By returning to their ancestral villages residents can avoid the risks of overcrowding and reduce the population density in a given area but may spread COVID-19 to other areas. Third, detection and registration of COVID-19 cases depends on patients presenting to health care providers. If the risk of visiting a health care centre outweighs the potential benefits patients may prefer not to seek treatment. The control and prevention of COVID-19 in informal urban settlements starts with organizing community infrastructure for diagnosis and treatment and assuring that basic needs (food, water, sanitation, health care and public transport) are met during quarantine. Next, community members at highest risk need to be identified and protected. Low-income, informal settlements need to be recognized as a reservoir and source for persistent transmission. Solutions to overcrowding must be developed for this and future pandemics. In view of the constant risk that slums present to the entire population decisive steps need to be taken to rehabilitate and improve informal settlements, while avoiding stigmatization.

Indexed as

Built environmentCOVID-19CrowdingInformal settlementsSARS-CoV-2Slums

Identifiers

PMID33250561
PMCPMC7680649

What OpenQuestion holds

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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.