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Jose-Luis Jimenez Profile picture
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10 Apr, 5 tweets, 2 min read
Dr. Conly (@WHO IPC Chair): "COVID is situational airborne"

Thomas Kuhn in “Structure of Scientific Revolutions” uky.edu/~eushe2/Pajare…

"Scientists faced w/ failing theory “devise numerous articulations & ad hoc modifications of their theory to eliminate any apparent conflict”
Last summer's "magical droplets" have not mutated into "situational airborne transmission"

Yes, it is transmitted in situations involving people re-breathing a lot of the same air indoors.

Not in situations outdoors o w/ good ventilation etc. when not re-breathing the same air.

So I guess "situational" is one way to put it...
Maybe what he means is that "it is airborne in situations in which there is transmission. And it is not airborne in situations in which there is no transmission" ?
The current status of the debate between #DropletDogma and #COVIDisAirborne

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More from @jljcolorado

Jose-Luis Jimenez Profile picture
10 Apr
1/ La principal forma de transmisión del coronavirus es por aire

- T: ¿Qué significa que el virus está en el aire?

- JLJ: No es una definición fantasmagórica, no significa que el virus va a viajar kilómetros...

telam.com.ar/notas/202104/5…
2/ ... y va a venir a infectar; significa que de las personas infectadas sale como un humo invisible que puede contener el virus con capacidad de infectar; ese humo son los aerosoles respiratorios, son partículas muy pequeñas, invisibles, que se quedan flotando en el aire."
3/ "¿Cuándo respiras muchos aerosoles de otro?. En 2 situaciones: cuando estás muy cerca, sobre todo sin mascarilla/barbijo, o cuando compartes el aire en una habitación cerrada, pq el espacio cerrado atrapa el aire q esa persona está exhalando. Son 2 situaciones muy frecuentes"
Read 23 tweets
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
8 Apr
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
Read 5 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

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