2/ Fascinating summary of weekly global COVID cases (left) and Google search for "COVID is airborne" (right) with some key moments highlighted.
3/ They summarized ASHRAE guidelines on how ventilation rate changes with occupant density for different types of spaces.
4/ Among useful aspects of the paper is the inclusion of a 4-pg table of "major studies on the airborne transmission of SARS-CoV-2." Breaks these down into: onsite virus measurements in air or aerosols; lab exp'ts; retrospective analysis on real outbreak events; & animal exp'ts.
5/ Also summarizes mechanisms, size distributions, estimates of quanta emission rates, various categories of COVID outbreaks, models for estimating risk, and IAQ control strategies. A lot to dig through.
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2/ Given that N95 supply has been reported fine for months, strange the CDC article comment was that “CDC continues to recommend that N95 respirators should be prioritized for protection against COVID-19 in healthcare settings”
Preprint: "Echoes Through Time: The Historical Origins of the Droplet Dogma & its Role in the Misidentification of Airborne Respiratory Infection Transmission"
3/ If you want to digest aspects of the story in deeper form, spoon-fed via Twitter thread, this is a long 🧵 that @jljcolorado put together in May along similar lines:
Well, imagine my shock that school districts in Colorado requiring masks have lower COVID transmission. How much lower if they also used good ventilation, HEPA filters, outdoor lunch, etc. (1/x)
2/ @CDPHE data via @johningold showing COVID cases for school-age kids in #Colorado districts w/ mask mandates (blue) are lower than those w/o mandates (orange). Yellow bar shows in-person school return.
But 6-17 yr cases very different at county level, so these wrap together.
3/ More data from @CDPHE via @johningold. Overall, COVID cases in 0-5 & 6-11 yrs age groups (no vax approval yet) still hovering near their peak levels as a Colorado state average.
🔥 by @DrAliceVirgil1 in @PsychToday. She argues indoor school meals are not only dangerous during COVID, but further destabilize a sense of truth and reality among gaslit students.
2/ "The term gaslighting comes from the 1944 film Gaslight ... invalidating her reality and understanding of her experiences."
"Trust in the person or entity doing the gaslighting is essential for it to be an effective tool to undermine a person’s entire perception of reality."
3/ "Yet, every day in countless lunchrooms across America, as both the New York and Chicago school districts have noted, children are eating and talking loudly, unmasked, in crowded indoor spaces without proper ventilation."
Article w/ tips on childrens' masks, by @BetsyMorris2. (🧵 & info, 1/x)
My quotes didn’t make article cut, but I agree w/ many others who have said priority order is: 1) Wearability (quality irrelevant if kid won’t wear) 2) Tight fit 3) Filtration quality wsj.com/articles/findi…
2/ In the context of kid masks, it’s worth following @masknerd and looking through great contributions he has made to provide test data & evaluations of various adult and kid masks:
2/ Also important: N95s are not limited due to a supply chain shortage. True for months and why the CDC finally updated their guidance yesterday. @projectn95 is a non-profit that provides a marketplace for vetted masks at low price: shop.projectn95.org/all/
3/ Any mask is better than no mask, but given the highly contagious Delta variant that now dominates, you should wear the best mask you can. See this great interview clip with @mtosterholm motivating the use of upgraded masks: