COVID-19 and importance of air filtration

Kapilan, N.; Rao, Lakshmi Nidhi

doi:10.1016/j.dsx.2021.06.020

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…Therefore, natural ventilation may not be sufficient in facilities without mechanical ventilation systems or air filtering devices. Previous studies have verified the effectiveness of high-performance air filters in alleviating the potential transmission of SARS-CoV-2 ( Agarwal et al, 2021 ; Mousavi et al, 2020 ; Zhao et al, 2020 ; Kapilan and Rao, 2021 ). However, the impact of the air purifier on virus removal performance is affected by the operating modes.…”

Section: Mitigation Performance Of the R-daycare Centermentioning

confidence: 89%

Identifying behavior of long-distance virus transmission and mitigation performance from a COVID-19 outbreak of a daycare center

Kim

Lee

et al. 2022

Environmental Research

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Section: Mitigation Performance Of the R-daycare Centermentioning

confidence: 89%

Identifying behavior of long-distance virus transmission and mitigation performance from a COVID-19 outbreak of a daycare center

Kim

Lee

et al. 2022

Environmental Research

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“…At the same time, several studies have concluded that many air lters fail to remove respiratory aerosols effectively. But indoor air puri ers with High E ciency Particulate Air (HEPA) lters may be used effectively to lter polluted indoor air providing the HEPA lters are replaced regularly [19].…”

Section: Discussionmentioning

confidence: 99%

Reduction by Air Purifier of Particulate Concentration During Orthodontic Procedures: a Pilot Study

Martín-Quintero

Cervera-Sabater

Brinkmann

et al. 2023

Preprint

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Background: The SARS-CoV-2 pandemic has raised awareness of the importance of air quality. This pilot study arose from the need to reduce the concentration of particulate matter in the dental office during orthodontic procedures. To evaluate the efficacy of using an air purifier during orthodontic care in the dental office to reduce the concentration of ambient particulate matter. Results:Significant reductions in particle numbers were obtained for all particle sizes except the largest particles counted (10um) through use of the air filter. A marked association between higher humidity levels and higher particle counts was also observed. Conclusions: Using an air purifier during dental care achieves a significant reduction in the concentration of ambient particles in the dental office. There is a correlation between higher relative humidity and higher particle concentration. The probability of obtaining a maximum particulate concentration level of 0.3um and 0.5um is 1000 times lower when using an air purifier.

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“…The chemical nature and concentration of particulate matters, as well as surface characteristics, also count ( 27 ). In an area where the population density is high and indoor environment with central air conditioning is common, the risk of disease spread also increases ( 28 , 29 ).…”

Section: Literature Reviewmentioning

confidence: 99%

Spatial risk for a superspreading environment: Insights from six urban facilities in six global cities across four continents

Loo

Tsoi

Axhausen

et al. 2023

Front. Public Health

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IntroductionThis study sets out to provide scientific evidence on the spatial risk for the formation of a superspreading environment.MethodsFocusing on six common types of urban facilities (bars, cinemas, gyms and fitness centers, places of worship, public libraries and shopping malls), it first tests whether visitors' mobility characteristics differ systematically for different types of facility and at different locations. The study collects detailed human mobility and other locational data in Chicago, Hong Kong, London, São Paulo, Seoul and Zurich. Then, considering facility agglomeration, visitors' profile and the density of the population, facilities are classified into four potential spatial risk (PSR) classes. Finally, a kernel density function is employed to derive the risk surface in each city based on the spatial risk class and nature of activities.ResultsResults of the human mobility analysis reflect the geographical and cultural context of various facilities, transport characteristics and people's lifestyle across cities. Consistent across the six global cities, geographical agglomeration is a risk factor for bars. For other urban facilities, the lack of agglomeration is a risk factor. Based on the spatial risk maps, some high-risk areas of superspreading are identified and discussed in each city.DiscussionIntegrating activity-travel patterns in risk models can help identify areas that attract highly mobile visitors and are conducive to superspreading. Based on the findings, this study proposes a place-based strategy of non-pharmaceutical interventions that balance the control of the pandemic and the daily life of the urban population.

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COVID-19 and importance of air filtration

Cited by 9 publications

References 10 publications

Identifying behavior of long-distance virus transmission and mitigation performance from a COVID-19 outbreak of a daycare center

Identifying behavior of long-distance virus transmission and mitigation performance from a COVID-19 outbreak of a daycare center

Reduction by Air Purifier of Particulate Concentration During Orthodontic Procedures: a Pilot Study

Spatial risk for a superspreading environment: Insights from six urban facilities in six global cities across four continents

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