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| http://dx.doi.org/10.1017/ice.2021.318 | DOI Listing |
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Comparative study of inactivation efficacy of far-UVC (222 nm) and germicidal UVC (254 nm) radiation against virus-laden aerosols of artificial human saliva.
Photochem Photobiol
January 2025
Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India.
Virus-laden aerosols play a substantial role in the spread of numerous infectious diseases, particularly in enclosed indoor settings. Ultraviolet-C (UVC) disinfection is known to be a highly efficient method for disinfecting pathogenic airborne viruses. Recent recommendations suggest using far-UVC radiation (222 nm) emitted by KrCl* (krypton-chloride) excimer lamps to disinfect high-risk public spaces due to lower exposure risks than low-pressure (LP) mercury lamps (254 nm).
View Article and Find Full Text PDFThe pathogenic burden potential of airborne particles in emanating from the respiratory area of COVID-19 patients (a case study).
J Occup Environ Hyg
January 2025
Air Pollution Research Center, Iran University of Medical Sciences, Tehran, Iran.
The pathogenic potential of airborne particles carrying the SARS-CoV-2 viral genome was examined by considering the size distribution of airborne particles at given distances from the respiratory zone of an infected patient after coughing or sneezing with a focus on time, temperature, and relative humidity. The results show an association between the size distribution of airborne particles, particularly PM and PM, and the presence of viral genome in different stations affected by the distance from the respiratory zone and the passage of time. The correlation with time was strong with all the dependent factors except PM.
View Article and Find Full Text PDFScience tells us that portable air filters reduce infection risk. It's time for public health authorities to make this clear.
J Infect Public Health
January 2025
Dalla Lana School of Public Health, University of Toronto, 155 College St., Toronto, Ontario M5T 3M7, Canada; Department of Civil & Mineral Engineering, 35 St. George St, Toronto, Ontario M5S 1A4, Canada.
Throughout the COVID-19 pandemic, Canadian public health advisors and politicians have shared mixed messages about the utility of portable air filters (PAFs) for mitigating the transmission of airborne infectious diseases. Some public health advisors and decision-makers have also suggested that PAFs are cumbersome or require expert advice. We take this opportunity to review evidence and address myths about PAFs.
View Article and Find Full Text PDFOral configuration-dependent variability of the metrics of exhaled respiratory droplets during a consecutive coughing event.
Comput Methods Programs Biomed
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Faculty of Engineering Sciences, Kyushu University, Fukuoka, Japan.
Background And Objective: Coughing events are eruptive sources of virus-laden droplets/droplet nuclei. These increase the risk of infection in susceptible individuals during airborne transmission. The oral cavity functions as an exit route for exhaled droplets.
View Article and Find Full Text PDFSelected microwave irradiation effectively inactivates airborne avian influenza A(H5N1) virus.
Sci Rep
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The Edgar L. and Harold H. Buttner Chair of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, USA.
The highly pathogenic avian influenza A(H5N1) virus threatens animal and human health globally. Innovative strategies are crucial for mitigating risks associated with airborne transmission and preventing outbreaks. In this study, we sought to investigate the efficacy of microwave inactivation against aerosolized A(H5N1) virus by identifying the optimal frequency band for a 10-min exposure and evaluating the impact of varying exposure times on virus inactivation.
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