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Jose-Luis Jimenez Profile picture
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8 Apr, 5 tweets, 2 min read
A great story on the Skagit Valley chorale outbreak

"@WHO & @CDCgov haven’t stressed that aerosols is dominant mode of infection"

Choir sp.: "We proved how you get this thing, & it’s so damn frustrating to watch the news & see that they’re ignoring it”

nytimes.com/interactive/20…
Link to our paper:

onlinelibrary.wiley.com/doi/10.1111/in…
I'll be grateful to Carolynn Comstock and the Skagit Valley Chorale for as long as I live.

When other organizations absolutely refused to help us investigate the event, they bent over backwards and answered our myriad confusing questions quickly, as well as dozens of follow-ups
They proofread our draft and later also our revised paper to make sure it was all as accurate as possible.

I can't help to tear up hearing their beautiful song.

Thanks Skagit Valley Chorale, from the bottom of my heart!
And this is a thread I wrote last September explaining the case, when the paper came out:

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More from @jljcolorado

Jose-Luis Jimenez Profile picture
9 Apr
1/ On Twitter Sociology, Part 2

I've used Twitter extensively only during the pandemic. Most interactions are useful, including open discussions w/ other scientists & professionals, and lots of Q&A with the public.
2/ Then there are the trolls and perhaps bots. More common in Spain's twitter than in other spaces (not sure why).

I hesitated at first, but now when it is clear that they are not listening but just trying to stir idle discussion, I just block them.
3/ I don't block ppl (general public or especially scientists) that disagree with me, but that do so thoughtfully and respectfully. In fact I've learned the most from that kind of ppl.

We scientists know that ppl disagreeing with you is normal, and that's often how we learn.
Read 10 tweets
Jose-Luis Jimenez Profile picture
5 Apr
1/ "Safe Spaces": Outstanding video explaining the main mode of transmission of COVID-19 (airborne) and how to protect ourselves.

By @VickiGSP w/ support from @trishgreenhalgh (+ limited input from me)

Posting as 3 tweets (bc of size limit), then link to complete YouTube video
2/ Part 2 of the video:
3/ Part 3 of the video:
Read 4 tweets
Jose-Luis Jimenez Profile picture
5 Apr
1/ CO2 and COVID transmission

Our paper (former preprint) is now published after peer-review in Environ. Sci. Tech. Letters:

pubs.acs.org/doi/10.1021/ac… Image
2/ Key concept, pioneered by Rudnick & Milton (2003), is that CO2 and airborne pathogens are exhaled at the same time by infectious people

Inhaling shared air with high CO2 increases virus inhaled (if infectious person present) & thus chance of infection

onlinelibrary.wiley.com/doi/abs/10.103…
3/ Two ways to use CO2: RELATIVE to a situation; and ABSOLUTE (between situations)

RELATIVE is easily understood: wherever you are sharing air, the lower CO2, the lower risk of infection

This is key concept why we recommend CO2 meters (section 9 of tinyurl.com/faqs-aerosol)
Read 16 tweets
Jose-Luis Jimenez Profile picture
1 Apr
1/ DONACIÓN DE MEDIDORES DE CO2 A LATINOAMÉRICA

Gracias a todos/as los que han contribuido a la campaña, que junto a los 10 que dono yo, nos da para 5 medidores +, en total 15.

2/ Con estos son 67 los que hemos donado (si no recuerdo mal), y llegamos a muchos países donde no habíamos llegado antes:

Venezuela, Honduras, Panamá, Guatemala, Uruguay, Brasil, El Salvador

Además de nuevos envíos a Ecuador, Chile, Paraguay, Colombia, México.
3/ Si echan de menos a Argentina es porque van muy por delante y están armando centenares de sus propios medidores. Sigan a @jorgeluisaliaga para los detalles.

Y como estos salen de EEUU no se pueden enviar a España tampoco.

A ambos países hemos enviado muchos medidores antes.
Read 9 tweets
Jose-Luis Jimenez Profile picture
31 Mar
Aerosol Scientists Try to Clear the Air About COVID-19 Transmission

"Medical textbooks have descriptions of virus transmission that are not consistent with basic physics"

By @jrdscience in @AGU_Eos (Official pub. of American Geophysical Union @theAGU)

eos.org/articles/aeros…
2/ "@WHO’s definition of respiratory droplets is wrong. Cloud droplets are around 20 micrometers and they don’t fall to the ground, he said. That means that droplets of larger size could be airborne longer than the WHO acknowledges."
3/ “It’s just absurd”. “This still is the official statement of the @WHO, and they have refused to correct it for a year.”

"@kprather88 and others created an open-source document of frequently asked questions (FAQ) about airborne spread."[tinyurl.com/faqs-aerosol]
Read 4 tweets
Jose-Luis Jimenez Profile picture
31 Mar
1/ Seven Hard and Crucial Lessons of Covid-19

An invisible virus exposes critical blind spots in science and society. But will we learn?

Very useful article to reflect on the pandemic's lessons

elemental.medium.com/7-hard-and-cru…

By @RobertRoyBritt
2/ Lesson 1: Virus science just underwent a paradigm shift

"Sanitizing groceries and drowning our homes with bleach was wrongheaded, in hindsight. The main mode of transmission is through the air, by breathing in aerosols that contain the virus”
3/ L1 (cont):

"@WHO & @CDCgov have been slow to acknowledge the outsized role of airborne spread and to translate what leading experts have been saying since last spring into loud and clear advice."

“Millions of people have been infected because we emphasized defending...
Read 6 tweets

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