ArticleInternational journal of environmental research and public health2021
Experimental Efficacy of the Face Shield and the Mask against Emitted and Potentially Received Particles.
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 9 papers, 1 of them a synthesis that pooled 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.
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.
Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.
- The effect of eye protection on SARS-CoV-2 transmission: a systematic review.Antimicrobial resistance and infection control · 2021Pooled it
- Nanotechnology in COVID-19 prevention, diagnosis, and treatment: a comprehensive review.Discover nano · 2025Review
- Effectiveness of Personal Protective Equipment against Coronavirus Disease 2019 Transmission: A Case-Control Study.The American journal of tropical medicine and hygiene · 2025Article
- Efficacy of facemasks in preventing transmission of COVID-19 in non-healthcare settings: A scoping review.Journal of infection prevention · 2024Article
- Evaluation of face shields used during aerosol generating procedures.Scientific reports · 2023Article
- Resource recovery from discarded COVID-19 PPE kit through catalytic fast pyrolysis.Journal of analytical and applied pyrolysis · 2023Article
- Article
- Experimental Investigation of Aerosol and COInternational journal of environmental research and public health · 2021Article
- Perceived Listening Difficulties of Adult Cochlear-Implant Users Under Measures Introduced to Combat the Spread of COVID-19.Trends in hearingArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
There is currently not sufficient evidence to support the effectiveness of face shields for source control. In order to evaluate the comparative barrier performance effect of face masks and face shields, we used an aerosol generator and a particle counter to evaluate the performance of the various devices in comparable situations. We tested different configurations in an experimental setup with manikin heads wearing masks (surgical type I), face shields (22.5 cm high with overhang under the chin of 7 cm and circumference of 35 cm) on an emitter or a receiver manikin head, or both. The manikins were face to face, 25 cm apart, with an intense particle emission (52.5 L/min) for 30 s. The particle counter calculated the total cumulative particles aspirated on a volume of 1.416 L In our experimental conditions, when the receiver alone wore a protection, the face shield was more effective (reduction factor = 54.8%), while reduction was lower with a mask (reduction factor = 21.8%) (
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Registered trials
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.