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IES Committee Report: Germicidal Ultraviolet (GUV) – Frequently Asked Questions

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The 2014 outbreak of the Ebola virus and the recent spread of the novel coronavirus disease 2019 (COVID-19) have renewed interest in germicidal ultraviolet (GUV) lamps for disinfection. UV radiant energy was first used for disinfecting surfaces in 1877,1,2 for water in 1910,3 and for air in 1935.4 GUV’s use in recent decades has been […]

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Indoor Air Changes and Potential Implications for SARS-CoV-2 Transmission

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Buildings have been associated with spread of infectious diseases, such as outbreaks of measles, influenza, and Legionella. With SARS-CoV-2, the majority of outbreaks involving 3 or more people have been linked with time spent indoors, and evidence confirms that far-field airborne transmission (defined as within-room but beyond 6 feet) of SARS-CoV-2 is occurring. Controlling concentrations

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Assessment of Air Contamination by SARS-CoV-2 in Hospital Settings

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The transmission modes of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remain controversial. At the emerging stage of the pandemic, many countries implemented high-level precautions, including airborne and contact precautions, to prevent the spread from patients to health care professionals (HCPs). An emerging understanding of SARS-CoV-2 epidemiology, which is primarily transmitted from person to person

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Low-cost measurement of face mask efficacy for filtering expelled droplets during speech

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The global spread of COVID-19 in early 2020 has significantly increased the demand for face masks around the world while stimulating research about their efficacy. Here we adapt a re- recently demonstrated optical imaging approach and highlight stark differences in the effectiveness of different masks and mask alternatives to suppress the spread of respiratory droplets

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Airborne SARS-CoV-2 Is Rapidly Inactivated by Simulated Sunlight

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Aerosols represent a potential transmission route of COVID-19. This study examined the effect of simulated sunlight, relative humidity, and suspension matrix on the stability of SARS-CoV-2 in aerosols. Simulated sunlight and matrix significantly affected the decay rate of the virus. Relative humidity alone did not affect the decay rate; however, minor interactions between relative humidity and other

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