Challenge of mechanical and antimicrobial filters against infectious phages artificially agglomerated with inorganic dust with a known particle-size distribution

Abstract

Duchaine (2020): Challenge of mechanical and antimicrobial filters against infectious phages artificially agglomerated with inorganic dust with a known particle-size distribution, Aerosol Science and Technology,

The impact of heating, ventilation, and air conditioning design features on the transmission of viruses, including the 2019 novel coronavirus: a systematic review of filtration

“…More recent aerosolized virus studies use the ASHRAE Standard 52.2 test duct. 26,31 This establishes an important level of consistency for future research. The aerosolized virus studies that state an explicit interest in SARS-CoV-2 used the bacteriophage MS2, which has a smaller size than SARS-CoV-2.…”

“…Five of seven aerosolized virus studies found that filtration was associated with virus removal using PRRSV, 30 equine arteritis virus (EAV), 30 bovine enterovirus (BEV), 30 human adenovirus, 29 and the bacteriophages T7 [27][28] and MS2. 31 One study found that increasing MERV rating was associated with decreasing virus concentration for bacteriophage T4 40 at different locations within an apartment unit, and another found that increasing MERV rating was associated with increasing viral filtration efficiency using bacteriophage MS2 26 in a test duct set-up (Table 4).…”

“…Only one aerosolized virus study used terminology that referred explicitly to virus, viral filtration efficiency, 26 while the remaining studies on virus removal used a variety of terms typical for particle removal: removal efficiency, 27 filtrating efficiency, 28 filter efficiency, 29 and filter reduction efficiency. [30][31] European ratings were presented with MERV rating conversions. 32 Using a data extraction form spreadsheet to ensure comprehensive and consistent capture of data, one reviewer extracted data and a second reviewer verified data for accuracy and completeness.…”

The impact of heating, ventilation, and air conditioning design features on the transmission of viruses, including the 2019 novel coronavirus: A systematic review of ultraviolet radiation

“…A consensus on an acceptable standard for virus reduction due to UV treatment might be helpful. Experimental studies may benefit from using the ASHRAE Standard 52.2 test duct which has been used in recent filtration studies [61,62]. Simply seeing more studies recognize that UV radiation dose is dependent on the radiant flux, which is often not uniform, shows a positive trend.…”

The impact of heating, ventilation, and air conditioning design features on the transmission of viruses, including the 2019 novel coronavirus: a systematic review of ultraviolet radiation

“…Experimental studies may benefit from using the ASHRAE Standard 52.2 test duct which has been used in recent filtration studies. [67][68] Simply seeing more studies recognize that UV radiation dose is dependent on the radiant flux, which is often not uniform, shows a positive trend. For ducted systems, flow that is well-mixed and close to uniform in velocity profile is helpful in evenly dosing aerosols with UV.…”