Evidence map›Paper›PMID 34444175›Full record

ArticleInternational journal of environmental research and public health2021

Effects of Air Purifiers on the Spread of Simulated Respiratory Droplet Nuclei and Virus Aggregates.

Ki Joon Heo, Inyong Park, Gunhee Lee, Keejung Hong, Bangwoo Han, Jae Hee Jung, Sang Bok Kim

Abstract read
In one paragraph

Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

  1. Use of portable air cleaners within an ambulance workspace.Journal of occupational and environmental hygiene · 2025
    Article
  2. Article
  3. Article
  4. 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

7 authors.

Ki Joon HeoDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Inyong ParkDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Gunhee LeeDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Keejung HongDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Bangwoo HanDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
Jae Hee JungDepartment of Mechanical Engineering, Sejong University, Seoul 05006, Korea.ORCID 0000-0001-6402-0252
Sang Bok KimDepartment of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.ORCID 0000-0002-6880-2662

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The present study was performed to quantitatively evaluate the effects of air purifiers on the spread of COVID-19 and to suggest guidelines for their safe use. To simulate respiratory droplet nuclei and nano-sized virus aggregates, deionized water containing 100 nm of polystyrene latex (PSL) particles was sprayed using a vibrating mesh nebulizer, and the changes in the particle number concentration were measured for various locations of the particle source and air purifier in a standard 30 m

Indexed as

Air FiltersVirusesAir MicrobiologyCOVID-19HumansSARS-CoV-2air purifierCOVID-19respiratory droplet nucleitransmissionvirus aggregates

Identifiers

PMID34444175
PMCPMC8394335

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.