1/ A sad anniversary: 1 year since one of the worst errors in the history of Public Health

SARS-CoV-2 is mostly transmitted through the air

But @WHO said, just a year ago, "FACT: IT IS NOT AIRBORNE"

And that saying it was airborne was "misinformation"

2/ We all make mistakes. But very important to correct them clearly

After saying loudly that virus only went through surfaces & large spray droplets, @WHO refuses to explain clearly that SARS-CoV-2 is airborne

Have NOT explained that their "FACT" of a year ago was a huge error
3/ It means that people don't know how to protect themselves, because they haven't explained clearly how virus is transmitted:

Like invisible smoke exhaled by the infected. We get infected by inhaling it

So ppl don't understand that indoors is dangerous despite distance
4/ And people don't understand that the more time indoors, the higher the risk of transmission.

Drawings by @numeroteca, translated by me
5/ And although @WHO know does say clearly that ventilation is very important, they don't say why.

(Hint: ventilation does NOTHING for surfaces or large droplets, but helps a TON for airborne)

So many ventilate when no one is there. Or a few minutes every hour, not enough.
6/ And people don't understand that plexiglass barriers don't serve any purpose (except in a cashier / teller situation, then they do help).
7/ And people don't understand that the virus accumulates in indoor spaces.

And that one has to wear a mask at all times, if other people are going to come in. And that just putting the mask on when the other people arrive is not enough.
8/ And people don't understand that measuring CO2 is extremely useful to detect places and situations with high risk of transmission.
9/ As you just saw, it is not that hard to explain.

Why doesn't @WHO have drawings like these by @numeroteca in their webpage, tweets, Facebook etc.?

They don't explain it --> Ppl don't get it --> Ppl don't protect themselves well & get infected --> pandemic is not stopped
10/ Lots more details about the science and the history of the denial of and resistance to airborne transmission in the next thread.

#COVIDisAirborne, that (and transmission w/o symptoms) is why this pandemic is hard to control!

No acknowledgement ==> ineffective protection.
13/ A graphical representation of the last year.

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More from @jljcolorado

30 Mar
1/ Parece que en España damos 1 paso para adelante y 2 para atrás...

Nueva ley ha salido hoy:

- Grave error: no obliga a llevar mascarillas en aire compartido por no convivientes. En todo momento, AUNQUE SE PUEDA GUARDAR DISTANCIA.
lavozdegalicia.es/noticia/socied…
2/ No es tan difícil de entender por qué hay que llevar mascarilla en interiores EN TODO MOMENTO, independientemente de la distancia.

Hay miles de brotes de superpropagación, todos así: interiores, con distancia, sin mascarilla.

3/ O más fácil de forma gráfica:

[puntos rojos representan el virus, y puntos negros el CO2)

De @numeroteca (numeroteca.org/cat/en-el-aire/) Image
Read 10 tweets
29 Mar
1/ A very good article in @elpaisinenglish about how to avoid becoming infected with COVID-19 by breathing the air exhaled by others:

(By the team that brought you "A room, a bar, and a classroom")

english.elpais.com/usa/2021-03-29…
2/ Humans exhale CO2. Our metabolism "burns" the foot we eat (carbohydrates, fats, proteins) into CO2 and other products (H2O, urea etc.) to extract energy.

Exhaled air has ~4% CO2 (40000 parts-per-million, or ppm). It is quickly diluted as it mixed w/ ambient air.
3/ We get COVID when we inhale virus-containing aerosols exhaled by others.

Mainly in 2 situations: (1) in close proximity because we inhale much more of the exhaled air of the other person then.

Distance reduces infection mainly because we breathe less of that exhaled air. Image
Read 17 tweets
28 Mar
1/ Aniversario funesto: 1 año de uno de los errores más grandes en la historia de la salud publica.

El SARS-CoV-2 se transmite sobretodo por el aire

Pero la OMS @WHO, justo hace un año, dijo que estaban seguros de que no, y que decirlo era "desinformación"!!

#CovidEstaEnElAire
2/ Todos metemos la pata, pero es importante corregir

El problema es q después de gritar que el virus sólo va por superficies y gotas grandes, @WHO se niega a explicar claramente que el virus va por el aire

Y no han explicado por ejemplo q ese mensaje de hace 1 año es un error
3/ Eso hace que la gente no se sepa proteger, porque no le hemos explicado cómo se transmite el virus: como un humo invisible que exhalan los infectados, y podemos inhalar en infectarnos.

Y la gente no entiende que interiores son peligrosos a pesar de distancia.

de @numeroteca
Read 13 tweets
28 Mar
1/ Un muy buen artículo en @el_pais sobre cómo evitar el contagio evitando respirar el aire de otros:

elpais.com/ciencia/2021-0…
2/ Los humanos exhalamos CO2. Nuestro metabolismo quema la comida (carbohidratos, grasas, proteínas) a CO2, y otros productos (agua, urea etc.)

El aire exhalado tiene 4% CO2 (40000 ppm). Se diluye rápidamente al mezclarse con aire ambiente.
3/ Nos contagiamos sobretodo al inhalar el virus exhalado por otros. Como los aerosoles (con virus, pero ++ grandes) y el CO2 se comportan de forma similar en el aire, el CO2 sirve de indicador de riesgo de contagio.

De @numeroteca

#CovidEstaEnElAire #SonLosAerosoles
Read 14 tweets
26 Mar
1/ DONACION DE MEDIDORES DE CO2 A LATINOAMERICA

Voy a donar 10 medidores más (Aranet 4) a países de Latinoamérica.

A gente que se comprometa a compartirlos, medir en muchos sitios, y compartir los resultados con #covidCO2 y de otras maneras públicas (puede ser anónimamente)
2/ Para que sirve medir el CO2?

Es un indicador de riesgo de infección. Nos dice cuanto aire exhalado hay en un sitio. Nos infectamos al inhalar aerosoles con virus exhalados por otros. Y los aerosoles y CO2 se comportan muy parecido en el aire.
3/ Para más detalles sobre el CO2 como indicador del riesgo de infección ver la sección 9 de tinyurl.com/preguntas-espa…
Read 10 tweets
25 Mar
1/ “Es urgente abordar de forma coordinada la transmisión de covid por aerosoles”

@el_pais ha publicado la carta, liderado por el grupo @aireamos, y firmada por más de 100 científicos.

Pedimos aplicación urgente y coordinada de medidas de prevención

elpais.com/ciencia/2021-0…
2/ La carta se ha enviado al Gobierno de España, y a todos los gobiernos autonómicos, pidiéndoles que apliquen las medidas de forma urgente y coordinada.

La carta íntegra se puede leer en:

bit.ly/Carta_COVID_Me…
3/ En la carta resaltamos que la comunidad científica internacional esta convergiendo en la gran importancia de la transmisión por el aire de COVID-19 (e.g. 20.
doi.org/10.1093/cid/ci…).

La OMS @WHO va muy por detrás, pero no podemos esperar para aplicar medidas ya.
Read 32 tweets

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