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Dr. Alex Huffman (he/him) Profile picture
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30 Sep, 4 tweets, 4 min read
Good article by @tanyalewis314 w/ summary of why we need #BetterMasks & practical tips.

Again, consistent voices from aerosol scientists that improved masks important for Delta. Quoted here: @linseymarr @kprather88 @masknerd; & see @projectn95. (1/x)
scientificamerican.com/article/why-we…
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”

cdc.gov/coronavirus/20…
3/ Thread by author @tanyalewis314 about the article in @sciam on improved masks:
Why We Need to Upgrade Our Face Masks—and Where to Get Them
scientificamerican.com/article/why-we…
4/ As the article & so many others have pointed out for months, masks w/ good quality AND fit important. As @meganranney so nicely & succinctly stated, the goal is "good-fitting masks that are WORN better."


cheddar.com/media/covid-19…

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More from @HuffmanLabDU

Dr. Alex Huffman (he/him) Profile picture
29 Sep
Airborne transmission of SARS-CoV-2 in indoor environments: A comprehensive review

Article lives up to it's comprehensive billing. A few plots, points from the paper (1/x)

HT @WBahnfleth
Article info: tandfonline.com/doi/abs/10.108…
Full preprint: linkedin.com/feed/update/ur… Image
2/ Fascinating summary of weekly global COVID cases (left) and Google search for "COVID is airborne" (right) with some key moments highlighted. Image
3/ They summarized ASHRAE guidelines on how ventilation rate changes with occupant density for different types of spaces. Image
Read 5 tweets
Dr. Alex Huffman (he/him) Profile picture
24 Sep
Preprint: "Echoes Through Time: The Historical Origins of the Droplet Dogma & its Role in the Misidentification of Airborne Respiratory Infection Transmission"

Worth time to read through fascinating history that @jljcolorado & this group unraveled. (1/x)
papers.ssrn.com/sol3/papers.cf…
2/ So many article authors on Twitter worth following incl: @jljcolorado @linseymarr @katierandall @EThomasEwing @zeynep @trishgreenhalgh @Don_Milton @jmcrookston @DFisman @Orla_Hegarty @Marcel_Loomans @WBahnfleth @pkubioaerosol @WargockiPawel @kprather88
papers.ssrn.com/sol3/papers.cf…
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:
Read 4 tweets
Dr. Alex Huffman (he/him) Profile picture
23 Sep
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)

From @CDPHE data; Article by @johningold in @ColoradoSun
coloradosun.com/2021/09/23/cor…
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.
Read 4 tweets
Dr. Alex Huffman (he/him) Profile picture
16 Sep
🔥 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.

Short 🧵 from article + links on lunchtime risk
(ht @kprather88)
psychologytoday.com/us/blog/compas…
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." https://en.wikipedia.org/wiki/Gaslight_(1944_film)#/media/Fi
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."
Read 9 tweets
Dr. Alex Huffman (he/him) Profile picture
16 Sep
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:

3/ The article also mentions an open Google doc put together by @ajprussin & @linseymarr on various kid masks, which is a useful resource:
docs.google.com/spreadsheets/d…
Read 7 tweets
Dr. Alex Huffman (he/him) Profile picture
11 Sep
Important #CDC update yesterday improves guidance on mask quality & fit; now recommends #N95 respirators as one option for #BetterMasks. (1/x)

Updates like this don't just happen. People like @kprather88 & @linseymarr have been pushing behind scenes. 🙏
cdc.gov/coronavirus/20…
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:

Read 14 tweets

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