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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CO2 (above ~400 ppm outdoors) indicates the amount of exhaled air (& virus) trapped in a space
Also per recent scientific results by @ukhadds, CO2 helps SARS-CoV stay infectious in air much longer
@united flight boarding, pretty terrible!
2/ This is the trip so far:
-Low outdoors
-Pretty high ~2000 in @RideRTD bus to airport
- ok ~800 at @DENAirport, except restroom ~1500. Not sure why restrooms at this airport are so often poorly ventilated
- Then boarding on @united, ventilation OFF, so huge increase till ON
3/ For details of the recent results on how and why CO2 makes SARS-CoV-2 stay infectious much longer in the air, see this recent thread by @ukhadds
1/ "After four years of fighting about it, @WHO has finally proclaimed that viruses, including the SARS-CoV-2 virus that causes COVID, can be spread through the air"
3/ "Words matter. When people heard that COVID might spread on surfaces, they wasted time wiping down groceries. People who misunderstood airborne spread needlessly wore masks on outdoor walks and veered off sidewalks to avoid their neighbors."
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"