1) Fact-checking government experts who speak about aerosol transmission with no understanding of it.
Dr Jalbert(40 min 22 : "If you are sitting and you don't shout loud, you will expel much less virus and the virus will go DOWN around you."
No about 85 %(maybe more) of the virus is transmitted through aerosols and they do not go down. Breath of hot air relative to room temperature goes up and follows the warm air plume rising around a human.
See this video.
As shown by this fluid dynamic simulation vs experiment. Note the speeds and the temperature of the breath. It goes up and so does the virus.
medrxiv.org/content/10.110…
Not convinced the virus is mostly spread by aerosols?
Follow this thread(In French).
Published experts on Covid aerosol transmission even wonder if it might not be closer to 100 % because there are no proven transmission through fomites or droplets.
Yet most of our sanitary protocols only address fomite or droplet spread.
"We don’t have a single documented case of covid-19 transmission from surfaces. Not one.
So why, then, are we spending a small fortune to deep clean our offices, schools, subways and buses?"
Joseph Allen(Harvard) and Linsey Marr(Virginia Tech)
washingtonpost.com/opinions/2020/…
What happens after the aerosols go up?
They cool down and mix in the room. Most of the aerosols produced by coughing, talking, breathing and singing are around 1 micron.
An exemple breathing.
researchgate.net/publication/34…
What about talking since Dr Jalbert has mentioned it?
Talking loud just produces more aerosols. Not bigger ones. (Rare splutters needs to infect by coming into contact with eyes, nostrils or an open mouth.)
sciencedirect.com/science/articl…
Why is this important?
Because a particle of :
- 0,5 micron can stay suspended in the air for 41 hours.(Virus will be inactivated before that.)
- 1 micron for 12 hours (some virus may remain active in air for as long as that)
- 10 micron about 8 minutes
cdc.gov/niosh/topics/a…
What are the strategies needed to minimize airborne transmission?
Screenshot from a video of @ShellyMBoulder who is the lead author of the first paper which evaluated the number of infectious quanta emitted(Skagit choir.
Many of these strategies are set aside by M. Roberge back-to-school plan.
- No more masks in class
- No standard for ventilation or real time monitoring by CO2 meters
- No HEPA filtration
- Isolation protocol unknown.
All of this spells trouble with hyper transmissible Delta.
Journalistes, à vous mettre en doute les messages des experts lorsqu'ils ne tiennent pas la route.
@AlexisRiopel @clicjf @Lactu_Borde @m_holubowski @Aaron_Derfel @lepharmachien @andrexnoel @RimaElkouri @josianecossette @e_fleury @JesseFeith @jonmontpetit @GloriaMTL @carlmarchand
Share this Scrolly Tale with your friends.
A Scrolly Tale is a new way to read Twitter threads with a more visually immersive experience.
Discover more beautiful Scrolly Tales like this.