Mary Wilson
New member
April 16, 2021
JAMA. Published online April 16, 2021. doi:10.1001/jama.2021.5053
Joseph G. Allen, DSc, MPH[SUP]1[/SUP]; Andrew M. Ibrahim, MD, MSc[SUP]2,3[/SUP]
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.[SUP]1[/SUP]
Controlling concentrations of indoor respiratory aerosols to reduce airborne transmission of infectious agents is critical and can be achieved through source control (masking, physical distancing) and engineering controls (ventilation and filtration).[SUP]2[/SUP] With respect to engineering controls, an important flaw exists in how most buildings operate in that the current standards for ventilation and filtration for indoor spaces, except for hospitals, are set for bare minimums and not designed for infection control. Several organizations and groups have called for increasing outdoor air ventilation rates, but, to date, there has been limited guidance on specific ventilation and filtration targets. This article describes the rationale for limiting far-field airborne transmission of SARS-CoV-2 through increasing outdoor air ventilation and enhancing filtration, and provides suggested targets.
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https://jamanetwork.com/journals/ja...ign=ftm_links&utm_content=tfl&utm_term=021621
JAMA. Published online April 16, 2021. doi:10.1001/jama.2021.5053
Joseph G. Allen, DSc, MPH[SUP]1[/SUP]; Andrew M. Ibrahim, MD, MSc[SUP]2,3[/SUP]
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.[SUP]1[/SUP]
Controlling concentrations of indoor respiratory aerosols to reduce airborne transmission of infectious agents is critical and can be achieved through source control (masking, physical distancing) and engineering controls (ventilation and filtration).[SUP]2[/SUP] With respect to engineering controls, an important flaw exists in how most buildings operate in that the current standards for ventilation and filtration for indoor spaces, except for hospitals, are set for bare minimums and not designed for infection control. Several organizations and groups have called for increasing outdoor air ventilation rates, but, to date, there has been limited guidance on specific ventilation and filtration targets. This article describes the rationale for limiting far-field airborne transmission of SARS-CoV-2 through increasing outdoor air ventilation and enhancing filtration, and provides suggested targets.
...
https://jamanetwork.com/journals/ja...ign=ftm_links&utm_content=tfl&utm_term=021621