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Jose-Luis Jimenez Profile picture
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27 Feb, 4 tweets, 2 min read
Informe oficial sobre transmisión del virus en hoteles de cuarentena en Australia: TRANSMISIÓN AÉREA
Contexto:

- OMS @WHO: transmisión por aire es casi imposible
- Es muy difícil de probar, y se sigue resistiendo (e.g. la OMS @WHO)
- Se prueba definitivamente con brotes en sitios donde hay poquísimos casos.

LO MISMO que paso con la viruela:
"Los que no conocen la historia están condenados a repetirla"
Más detalles de Australia:

watoday.com.au/national/weste…

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More from @jljcolorado

Jose-Luis Jimenez Profile picture
28 Feb
1/ Cada vez esta mas claro que #COVIDEstaEnElAire.

En principio los virus respiratorios se pueden transmitir de 3 maneras: por superficies, por gotas proyectiles, y por el aire (“aerosoles”).

academic.oup.com/jpids/article/… Image
2/ O como dice el Prof. Yuguo Li (líder mundial en este campo) tenemos que pensar en 3 mecanismos:

- tocar superficies
- spray de gotas (= proyectiles)
- inhalación de aerosoles

onlinelibrary.wiley.com/doi/full/10.11… Image
3/ ¿Por que ha sido tan difícil controlar esta pandemia?

Porque nos han hecho defendernos y gastar muchos recursos en vías de transmisión poco importantes, y han ignorado las medidas de protección que de verdad si funcionan.

(También por no inmunidad, y trans. sin síntomas)
Read 39 tweets
Jose-Luis Jimenez Profile picture
27 Feb
I am one of the scientists that sent the letter to the Biden administration asking them to better protect workers against aerosol transmission.

This employee was fired for correctly asking for those protections.

Shame on Trader Joe's. And on @CDCgov's inaction that allows this.
@TJoesOfficial
@drdavidmichaels is the former longest-serving head of @OSHA_DOL, and a signatory of our letter to the Biden administration.

As he points out, firing someone for raising a safety concern is illegal.

Read 7 tweets
Jose-Luis Jimenez Profile picture
25 Feb
Por fin @sanidadgob lo esta diciendo claramente:

**Ventilación continua, cruzada y distribuida**

Les falta la M de CCDM, "medida." Como dijo Lord Kelvin, "sólo se puede mejorar lo que se mide"

Hay que medir CO2. Esperemos que no cueste 8 meses, como ha costado esto.

#covidco2
Hay quien dice que no se puede medir CO2 porque los medidores cuestan dinero

2 respuestas:

1) A medio plazo necesitamos un medidor publico en todos los sitios donde compartimos aire. Pero a corto plazo 1 por escuela, empresa etc. ayudaría mucho. ¿100 E por escuela es demasiado?
2) Se desperdicia una gran cantidad de dinero en desinfectar superficies, lo que no sirve para nada.

Y en exceso de gel hidroalcohólico, ver este ejemplo de Andalucía. Con el gel sobrante se podrían comprar 26 medidores de CO2, 11 HEPA, 2200 masc. FFP2

Read 5 tweets
Jose-Luis Jimenez Profile picture
24 Feb
1/ Aranet4 has created a very simple system to display the CO2 measurement in a large screen (smart TV) in public locations. This type of public display of CO2 should be required by law **in all public locations where we share air**. During the pandemic and later too.

#covidCO2
2/ Because high CO2 and bad ventilation facilitate the transmission of respiratory diseases such as COVID-19, but also flu, colds (other coronaviruses, rhinovirus). And also e.g. measles, which is an issue again due to lower vaccination rates.

So this should be done permanently
3/ And also for reasons of health related to indoor air quality (air toxics, radon etc.).
Read 4 tweets
Jose-Luis Jimenez Profile picture
24 Feb
@CDCgov: proper ventilation indoors can cut down the spread of COVID-19. But how can you tell if a space is well ventilated?

"One thing that's practical, with limited costs, and that is very useful, is to measure CO2"

wyomingpublicmedia.org/post/fresh-ind…

By @maggiemlln
2/ For more details on the usefulness and caveats of using CO2 to monitor relative infection risk, see Section 9 of our Scientist's FAQs:

tinyurl.com/faqs-aerosol
3/ For the gory details, see our preprint:

medrxiv.org/content/10.110…
Read 4 tweets
Jose-Luis Jimenez Profile picture
23 Feb
1/ US Nurses, Unions, Allies Urge CDC to Acknowledge Covid-19 Aerosol Transmission to Help Bring Virus Under Control

aft.org/press-release/…

@rweingarten
2/ National Nurses United (NNU) and 44 allied unions and organizations, representing over 13 million members and their communities, are joining in coalition to urge the U.S. Centers for Disease Control and Prevention (CDC) to update its Covid-19 guidance to fully reflect the...
3/ latest scientific evidence regarding SARS-CoV-2 transmission through aerosols that infected people emit when they breathe, speak, cough, sneeze, or sing.
Read 12 tweets

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