Th0mms3nAug 16, 2024

Think of an airborne pandemic as a global network of poorly ventilated rooms where humans rebreathe each other’s air.

Then you realize this pandemic is a global indoor air crisis.

All countries have a responsibility to provide #SafeIndoorAir.

#WorldVentil8Day #COVIDisAirborne

Via X - Maarten de Cock mdc_martinus https://x.com/mdc_martinus
https://x.com/mdc_martinus/status/1590027392697131009

Maarten De Cock (@mdc_martinus) on X

Think of an airborne pandemic as a global network of poorly ventilated rooms where humans rebreathe each other’s air. Then you realize this pandemic is a global indoor air crisis. All countries have a responsibility to provide #SafeIndoorAir. #WorldVentil8Day #COVIDisAirborne

X (formerly Twitter)
Show threadFredy NEESEROct 21, 2023

@nousaerons
And here's the link to the UK Class-ACT study. I hope it will be open access at some point.

#SafeIndoorAir
#CleanAirClassrooms

https://adc.bmj.com/content/108/Suppl_2/A98.1

901 Class-ACT: the UK’s trial on the feasibility and effectiveness of air cleaning technologies in schools

Objectives Covid-19 shone a spotlight on the poor air quality present in many classrooms and led to multiple calls for Air Cleaning Technologies (ACT) in schools. This is understandable given the ability of these technologies to remove or inactivate airborne viruses (via filtration or UVC light respectively). However, there is little knowledge about the practicalities and trade-offs associated with implementing ACT at scale. Moreover, technologies that are shown to be effective in laboratory studies can have variable degrees of success in the real-world. This creates complexities for policymakers from cost-benefit analyses of whether to invest in ACT, through knowing what, where, and how to deploy ACT effectively. The CLASS-ACT study determined: 1. The feasibility of installing and running ACT within classrooms 2. The impact of HEPA filter air cleaning technologies (HEPA-ACT) on air quality in primary schools 3. The effectiveness of HEPA-ACT in reducing illness-related primary school absences. Methods Thirty primary schools were assigned to three groups balanced for school type (building; ethnicity; free school meals; total student numbers). These were randomly allocated to three arms: control; HEPA-ACT; UVC-ACT. All schools were predominantly naturally ventilated and relied on manual opening of windows and doors to ventilate classrooms. All classrooms were equipped with air quality monitors. Qualitative work was conducted on the feasibility of installing ACT, air quality analysis was conducted, and epidemiological models determined the impact of ACT on covid-19 related illness. Results The CLASS-ACT consortium found a guidance gap on the use of passive UVC devices in schools, so the UVC arm was not included. Air quality data indicated comparable ventilation rates between groups, and a 48% mean reduction in particulate matter in the HEPA-ACT classrooms. We expect to be able to report any impact on school absences at the conference. We identified a number of challenges in the deployment of HEPA filters within school settings and identified capability, motivation and opportunity issues that need to be considered. Conclusion CLASS-ACT has yielded valuable information that can shape future policy regarding the deployment of air disinfection technologies in schools. It can inform the UK Government, Integrated Care Boards, and Education professionals on the effectiveness and the practicalities of using these technologies in schools. HEPA-ACT is not a panacea and implementation in schools requires careful consideration, but it is a useful tool. Its ability to remove particles, including airborne pathogens, could help schools (and paediatric clinics) become healthier environments.

Archives of Disease in Childhood
Show threadFredy NEESEROct 21, 2023

@nousaerons
Here's an excellent description of the Class-ACT (Classroom air cleaning technology) study that was conducted in UK schools during Delta and Omicron phases.

#SafeIndoorAir
#CleanAirClassrooms

https://corsirosenthalfoundation.org.uk/articles/class-act/

Class-ACT study shows Air Cleaning reduced illness rates in UK schools during major COVID-19 epidemic

We now know that air cleaning with portable HEPA filtration can inhibit the transmission of SARS-CoV-2, the virus which causes COVID-19.

Corsi-Rosenthal Foundation
David EldredgeFeb 21, 2023

#Aranet4 data logger capabilities allows one to simply calculate air changes per hour (ACH) by taking CO₂ decay data and plugging it in to a typical decay rate function.

The local facility manager continues to say these meeting houses are safe, to code and highly energy efficient! I agree only with the latter, 'energy efficient!" 😉

HT: @j_g_allen of Harvard for the equation
#SAFEindoorAir #IAQ #decayrate #CovidCO2 #CO2Warrior

Upstart CrowFeb 4, 2023

BaylessMarilyn
@BaylessMarilyn

#USAF (Retired). What’s new and #exciting ? Find the #truth. Tell others. #Ukraine #Politics #Fascism #Covid #Covid19 #LongCovid #Vaccines #Photography #BreakingNews #HEPA #Masks #ClimateChange #Novavax #VeganRecipes #Gardening #Peppers #FascistAttack #CovidIsAirborne #CovidCautious #SafeIndoorAir #FeralCats #DisasterPreparedness #FarUVC #DavosSafe
#follow #followfriday #boost
#altext #nikon #gimp #art #DigitalArt
Early July Afternoon
by Carl J Shoemaker

Show threadBenjamin VenessDec 7, 2022
@sortius I’m glad the school is paying attention to #SafeIndoorAir and impressed that your kids are still wearing masks in the face of social pressure to remove them! Has that been difficult?
David EldredgeDec 2, 2022

Good coverage on the airborne nature of ILIs and the use of #Aranet4 #SafeIndoorAir

https://ksltv.com/513364/a-professor-works-to-combat-virus-spread-through-indoor-air/

A professor works to combat virus spread through indoor air

Demetrius Paragonis was called on to help measure the risk for spread inside performance venues, here's what he found.

KSLTV.com
Fredy NEESERNov 13, 2022

Hi!
Bin #neuhier und freue mich auf spannende Kontakte. Hoffe auch, viele migrierende Tweeties aus der #SchweizerBubble und #TeamScience wiederzusehen! 🤗

Werde wohl vor allem zur #Pandemie, #SafeIndoorAir und #ProtectTheKids tröten, aber hier ist, was ich sonst gerne mag:
Fingerstyle-Gitarre, kubanische Musik, …

Zur Zeit nur in einer kleinen Bubble und mit genügend frischer Luft:
#SalsaCubana, #NewYorkStyle

Kerim 傅可恩Nov 10, 2022

Biden Administration Clean Air in Buildings Challenge

https://www.epa.gov/indoor-air-quality-iaq/clean-air-buildings-challenge

#covidisairborne #safeindoorair #noxp

Kerim 傅可恩Nov 10, 2022
What organizations and individuals are doing good work promoting information about the fact that #covidisairborne and (especially) that we need better policies to promote #safeindoorair?