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Jose-Luis Jimenez Profile picture
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5 Jul, 3 tweets, 2 min read
No debemos dejar de recordar que hay 0 casos demostrados de transmisión por superficies

Es + fácil desinfectar superficies para generar una falsa sensación de seguridad, que afrontar la verdadera vía de transmisión: el aire

Con @SchrodingerGata en @Nwtral

#CovidEstaEnElAire
Y un par de referencias:

@Nature, revista científica más importante: nature.com/articles/d4158…
Y la @CDCgov lo viene diciendo desde Mayo 2020, y en 2021 de forma contundente:

cdc.gov/coronavirus/20…

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More from @jljcolorado

Jose-Luis Jimenez Profile picture
25 Jun
1/ NEW CAMPAIGN: I'M HELPING @zerocovidthai (with generous support from @AranetloT) to DONATE CO2 METERS to SOUTHEAST ASIA

COVID-19 is mostly transmitted through the air, by breathing in infectious aerosols, in close proximity or in shared room air (thelancet.com/journals/lance…) Image
2/ For that reason, this is an indoor-dominated pandemic. It is much easier to be infected indoors than outdoors (academic.oup.com/jid/article/22…).

The best infection prevention strategy is do everything that you can outdoors
3/ But we have to go indoors at times.

Measuring the virus in the air is difficult, slow, and expensive.

CO2 indoors marks the presence of exhaled air, and serves as a proxy for the virus (cartoon from @numeroteca)

#covidCO2 Image
Read 32 tweets
Jose-Luis Jimenez Profile picture
13 Jun
1/ Hay gente que dice que "si la COVID se transmitiese por el aire, ya nos habríamos contagiado todos."

No es así: ejemplo de tuberculosis pulmonar (TBP) en Estados Unidos:

- Se transmite por el aire (cdc.gov/tb/topic/basic…)
2/ - No hay inmunidad, hay una vacuna (BCG) pero no se usa en EEUU (cdc.gov/tb/topic/basic…).

- La vacuna BCG no protege de TBP ni impide la transmisión (historyofvaccines.org/index.php/cont…
3/ Sin embargo, a pesar de que se transmita por el aire, en EEUU no tenemos una pandemia de TBP comparable on la COVID-19.

- En 1.5 anios llevamos > 33 M de casos de COVID en EEUU (10000 casos por 100000 habitantes nytimes.com/interactive/20…)
Read 10 tweets
Jose-Luis Jimenez Profile picture
13 Jun
La entrevista con @XLSemanal sobre las formas de contagio y el lío con la OMS @WHO se puede leer en:

La clave: "Se habría logrado bajar mucho la tasa de contagio si se hubiera aceptado que el aire era una forma de contagio y la forma de protegerse"

xlsemanal.com/personajes/202…
Un detalle es que la carta de los 239 científicos se publicó en julio 2020, no en abril como dice el artículo. Tal vez se lo dije mal al hablar deprisa.
Tambien la 1a frase del articulo "Es prácticamente imposible que las miles de gotitas que emitimos al hablar infecten a las personas y los objetos que nos rodean." no es algo que diría yo. Porque no es imposible, simplemente es una forma seguramente poco importante de contagio.
Read 4 tweets
Jose-Luis Jimenez Profile picture
25 May
1/ The article "A room, a bar, and a class: how the coronavirus is spread through the air" in @elpaisinenglish has just won the Ortega y Gasset Prize, the most prestigious for the Spanish language press.

The thread below summarizes the article.
2/ The article was written by @javisalas and @Mariano_Zafra.

The same team also wrote this article later on how measuring CO2 is useful to reduce transmission.

3/ The article that won the award was based on our shared-room air transmission estimator. It remains correct, although with the new variants transmission goes up some (the estimator allows taking this into account).

tinyurl.com/covid-estimator
Read 5 tweets
Jose-Luis Jimenez Profile picture
25 May
1/ El artículo de @el_pais "Un salón, un bar, y una clase: así contagia el coronavirus en el aire" acaba de ganar el Premio Ortega y Gasset, el más prestigioso del periodismo en español.

elpais.com/ciencia/2020-1…
2/ Es un artículo extraordinario, y os recomiendo mucho leerlo si no lo habíais hecho. Sigue siendo correcto (aunque habría que aumentar un poco los contagios por las variantes).

Aquí la noticia del premio:

elpais.com/sociedad/2021-…
3/ Un trabajo espectacular de @Mariano_Zafra y @javisalas

Basado en nuestro estimador de contagios, disponible en:

tinyurl.com/covid-estimator

Un servidor ayudó a comprobar que los cálculos fueran correctos.
Read 4 tweets
Jose-Luis Jimenez Profile picture
24 May
1/ A great paper by @trishgreenhalgh explaining the debate over airborne transmission during the pandemic.

Although airborne transmission is the only important mode of transmission, it was ignored by @WHO and the Public Health establishment. This paper explains why & how.
2/ "Political and policy actors at international, national, and regional level aligned—predominantly though not invariably—with medical scientific orthodoxy which promoted the droplet theory of transmission and considered aerosol transmission unproven or of doubtful relevance."
3/ "This dominant scientific sub-field centred around the clinical discipline of infectious disease control, in which leading actors were hospital clinicians aligned with the evidence-based medicine movement."
Read 6 tweets

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