1/ What does "aerosol" or "airborne" transmission suggest to people?
I am impressed by the accuracy of the responses. Indeed the **most important implication is that transmission occurs in shared room air**, and protecting against that.
But since social distance and masks work well for that, the practical implications of accepting aerosol transmission are much smaller for that.
And indeed many fewer ppl think of that
3/ Trans. beyond shared room ("long range") possible, but much less likely.
Won't be clear till there is low prevalence.
E.g. long range trans. for smallpox could only be proven for an outbreak in complete absence of community transmission: academic.oup.com/aje/article-ab…
4/ Transmission outdoors is possible but FAR less likely than indoors. Overwhelming majority of superspreading is indoors
Trans. can happen outdoors, but very unlikely except for close conversation without masks (there are some documented cases of transmission this way)
5/ Of course many responses to this poll were from people who follow my colleagues & I, and have learned about aerosol transmission through the discussions and materials we provide
But this demonstrates that if we provide accurate info, it can be accurately understood.
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1/ New paper in @ScienceMagazine: "Mandating Indoor Air Quality for Public Buildings"
Explaining current status of indoor air quality standards (in short: bad or non-existent), the huge health benefits that would arise from them & proposing a path forward science.org/doi/10.1126/sc…
2/ "People living in urban & industrialized societies, which are expanding globally, spend more than 90% of time indoors, breathing indoor air (IA)."
"Most countries do NOT have legislated indoor air quality (IAQ) performance standards for public spaces"
1/ Measuring CO2 indoors in a 10 day trip from US to Europe & back
Bus @RideRTD to Denver airport, poorly ventilated as usual.
We have not left town yet! In previous trips it kept increasing, we'll see this time.
2/ For background on what CO2 indoors indicates and more details, see
TLDR:
- We exhale 40000 ppm CO2
- Outdoors: 420
- Each 400 extra ppm indoors = 1% extra rebreathed air
- CO2 makes us dumber, indicator of virus & pollutants. Does not capture filteringdocs.google.com/document/d/e/2…
3/ Or by reducing recirculation. Some recirculation is ok if well-filtered, saves energy.
Energy-recovery ventilators allow ventilating well with limited energy use.