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Prof. Jose-Luis Jimenez Profile picture
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25 Dec, 5 tweets, 3 min read
The @CDCofBC doesn't know jack sh*t about airborne transmission.

OF COURSE distance reduces transmission for airborne! Exhaled virus-containing aerosols are far more concentrated near the infected person.

This has been misinterpreted for a century as "droplet transmission" Image
They are repeating the error of Alexander Langmuir (later of the @CDCgov) in the 1940s, which led them to erroneously underestimate the importance of airborne transmission for many diseases.
Details in this thread:
And this preprint:

papers.ssrn.com/sol3/papers.cf…
If @CDCofBC is still ignorant of this basic scientific fact, after 2 year of intense debate and so many publications, it is terrible.

If they actually know, and they are just lying, it is worse...

ncbi.nlm.nih.gov/pmc/articles/P…

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More from @jljcolorado

Prof. Jose-Luis Jimenez Profile picture
24 Dec
87/ MEXICO: very poor ventilation in movie theater @Cinemex (Pabellón Cuauhtémoc)

2300 ppm CO2 = ~5% of air that people breathe is "second-hand air", that has been in someone else's lungs before

Without distance, eating/drinking (so no masks) etc.

88/ CANADA (BC @PHSAofBC): Top Public Health Official B. Henry in incredible collection of errors and denial of science during 2021

- denying obvious airborne
- denying that masks protect against aerosols
- denying school transmission
- so many more...

89/ MEXICO: (Guadalajara, @FILGuadalajara) cabins for spraying disinfectants on people before entering the Book Fair

For an airborne virus (who.int/news-room/ques…) that goes poorly, if at all, thru surfaces (cdc.gov/coronavirus/20…)

HT @miricaiba Image
Read 6 tweets
Prof. Jose-Luis Jimenez Profile picture
19 Dec
1/ Examples of GOOD PRACTICES worldwide to stop transmission, given that #COVIDisAirborne

There are many BAD examples in a separate thread (), that others should avoid.

Here I will try to compile some of the good examples that others should copy.
2G/ UK Government: "COVID is like smoke" with a clear visualization:

[Note that many countries have both good and bad examples. Such is the situation we are in, as @WHO et al. don't provide a strong message that would lead to the good mssgs prevailing]

3G/ FRANCE, government: good visualization of the behavior of airborne aerosols indoors, and the impact of ventilation.

Read 25 tweets
Prof. Jose-Luis Jimenez Profile picture
17 Dec
1/ Sobre el origen de la COVID

Es un tema en q no soy experto. Al principio casi todos los virólogos decían q era origen natural

Mi impresión actual es q origen natural (de animal) o q un virus natural contagiase a un investigador en Wuhan son los 2 posibles. No se sabe seguro
2/ Leo los debates, y ese es mi resumen por ahora: las 2 hipótesis tienen buenos argumentos y son plausibles. No hay uno q sea claramente cierto o falso.

Si les interesa el debate, gente a la q seguir incluye @MichaelWorobey, @Ayjchan, @c_drosten y otros virólogos
@MichaelWorobey @Ayjchan @c_drosten 3/ Los medios chinos andan echando balones fuera. Si es verdad, por ocultarlo, y si no lo es, para que no se les acuse injustamente.

Read 4 tweets
Prof. Jose-Luis Jimenez Profile picture
15 Dec
1/ So @mvankerkhove of @WHO has admitted that #COVIDisAirborne, but they avoid saying it on purpose

Does she think that decision has harmed the public health response, or cost lives? No, she says. "People know what they need to do to protect themselves"

wired.com/story/the-teen… Image
2/ I beg do differ. I think that decision by @WHO is one of the LARGEST ERRORS IN THE HISTORY OF PUBLIC HEALTH

Let's compile evidence of how govts and organizations either don't know how to protect their citizens, or use @WHO's ambiguity to avoid doing so

Pls reply w/ examples!
3/ CANADA: TODAY telling a top airborne transmission scientist (@linseymarr) that she needs to remove her respirator and put on a leaky surgical mask, before sharing the air in a bus! As the highly transmissible AIRBORNE Omicron grows exponentially

Read 85 tweets
Prof. Jose-Luis Jimenez Profile picture
14 Dec
1/ Why is there such EXTREME RESISTANCE by @WHO, @CDCGov and IPC(*) to clearly state that COVID-19 is a dominantly AIRBORNE disease?

TLDR: see slide

*: IPC: Infection Prevention and Control scientists and professionals
2/ This is extremely puzzling, as it is now extremely obvious that airborne transmission is DOMINANT for COVID-19.

There are mountains of evidence, e.g. as summarized in our @TheLancet publication.

And NO evidence whatsoever for droplets or surfaces!

3/ I've pondered this question a lot. I've been involved in discussions with @WHO, many IPC and public health researchers and practitioners, politicians in multiple countries etc.

This thread summarizes my understanding of the causes of this situation. I look forward to comments
Read 29 tweets
Prof. Jose-Luis Jimenez Profile picture
8 Dec
The Dutch government spreading misinformation and showing they have a **completely outdated** understanding about COVID transmission.

There are ZERO proven cases of surface transmission, and @CDCgov has been telling us for a year that it is rare (cdc.gov/coronavirus/20…)
Transmission is dominantly #Airborne (thelancet.com/article/S0140-…), so the DOMINANT message needs to focus on ways to protect ourselves from airborne transmission.
This government misinformation (a problem in lots of countries) won't end until @WHO says VERY LOUD AND CLEAR that #COVIDisAirborne, as they have actually admitted:

Read 9 tweets

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