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Maarten De Cock Profile picture
@mdc_martinus
Nov 1, 2023 • 13 tweets • 5 min read • Read on X
Published in @TheLancet on January 24, 2020 (!)

Chinese scientists warned the world:
👉“Airborne precautions..are strongly recommended”

The @WHO refused to do this & also ignored the letter👇from @GlobalNursesU to @DrTedros (Jan. 30, 2020) asking @WHO for airborne precautions. Image
Source: thelancet.com/journals/lance…
On the same day, January 24, the publication day of this important warning from Chinese scientists to take airborne precautions, @DrMikeRyan sends a message to the @WHO staff stressing that this is contact/droplet transmission “until the data says otherwise”.
@DrMikeRyan @WHO Why this could happen?…
@DrMikeRyan @WHO Even earlier…

CDC document, JANUARY 6, 2020.
“For Internal Use Only/Not For Distribution”

👉 “Health experts are locally recommending that citizens pay attention to maintaining indoor air circulation [ventilation], avoid closed and airless..crowded places, and wear masks…” Image
An early warning on airborne, asymptomatic transmission and superspreading events was published in @Time on JANUARY 30, 2020.

👉

It also features a video with Prof. Yuen👇.

Now compare this to @WHO's “let's not overreact”/“not airborne” misinformation… time.com/5774366/how-co…
@TIME @WHO From an email exchange with CDC people on January 22, 2020. The questions from a clinical webinar make clear that they at least assumed the new coronavirus was airborne.

- “Are the recommended precautions Airborne or Droplet?”
- “Airborne” Image
@TIME @WHO Since this is turning into an “Airborne in January 2020” thread, I’ll add this also:
@TIME @WHO 25 January, 2020.

South China Morning Post:

“Call for preparedness against airborne transmission including fitted respirators…”

web.archive.org/web/2020012508…Image
@TIME @WHO
@TIME @WHO x.com/mdc_martinus/s… x.com/mdc_martinus/s…
@TIME @WHO x.com/mdc_martinus/s… x.com/mdc_martinus/s…
@TIME @WHO @threadreaderapp unroll

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More from @mdc_martinus

Maarten De Cock Profile picture
Aug 12, 2025
Useful article, but nothing new.

We've simply forgotten that, in the late 19th century, inspectors frequently used CO₂ meters in classrooms & workplaces to ensure legal ventilation standards were met.

This ended when 20th-century droplet dogmatists in public health took over. Image
👇
Public health in the UK before it was taken over by droplet dogmatists:

“in the interest of public health, a standard of ventilation for factories and workshops will be prescribed under…the Factories and Workshops Act, 1901, which shall not be lower than👉[900 ppm CO₂]. Image
Read 4 tweets
Maarten De Cock Profile picture
Nov 28, 2024
"The outright denial of the airborne route
was NEVER justifiable!"

This little 📹 montage is dedicated to the COVID-19 Airborne Transmission Alliance (CATA), who are fighting for the truth and exposing the lies of the authorities that closed their eyes to science.

Never again!
A heartfelt 🙏 to all the truthfighters who continue to stand firm in the face of opposition. Your courage and integrity are essential. @barryjmjones, @SafeDavid3, @DRTomlinsonEP, @EvonneTCurran, @_CatintheHat, @PeteUK7, the @covidisairborne group, @Iamgoingtosleep & many others.
@barryjmjones @SafeDavid3 @DRTomlinsonEP @EvonneTCurran @_CatintheHat @PeteUK7 @covidisairborne @Iamgoingtosleep *for those who prefer the video without the background music:
Read 4 tweets
Maarten De Cock Profile picture
Oct 20, 2024
44 aircrew flew while infectious with mpox on 177 domestic flights and 70 U.S.-bound international flights.

“CDC did not include passengers in the aircraft contact definition for aircrew with mpox; therefore, secondary cases among passengers may have also been missed.” Image
Image
“21% [of the aircrew infectious with mpox] reported having traveled with respiratory symptoms which potentially pose a greater risk for transmission…”

Source: academic.oup.com/jtm/advance-ar…
(Correction. Second image should have been this👇)

“…outcome reports for contact investigations were unavailable for all 44 aircrew members (…) therefore, secondary cases may have been unreported and missed.” Image
Read 4 tweets
Maarten De Cock Profile picture
May 13, 2024
New paper by @linseymarr & @Jon_Samet

“One..key lesson learned from the COVID19 pandemic became clear..: the need to embrace the management of indoor air as a primary tool for controlling transmission of respiratory pathogens..through ventilation, filtration and disinfection.”🧵 Image
“Studies in schools have illustrated that mitigations aimed at removing virus from the air were associated with reduced transmission of COVID-19.” Image
“The evidence accumulated since the pandemic's start is substantial. Laboratory, observational, and modeling studies are coherent in supporting strategies-ventilation, filtration, disinfection, and masking for reducing the amount of pathogens in indoor air.” Image
Read 7 tweets
Maarten De Cock Profile picture
May 10, 2024
“Strong and consistent evidence for a predominantly airborne mode of transmission emerged early in the pandemic but was denied or downplayed by WHO and national public health bodies for years.”
1/4

Image
Image
“…dominant voices in the infection prevention and control community did not grasp the basics of airborne transmission and failed to listen to people who did.”
2/4
“To have these new terms be taken up by various institutions and scholars (…) will be complex and unrealistic, requiring extensive retraining and the rewriting of hundreds of documents. Pragmatically, a new set of terms will add to existing confusion, not reduce it.”
3/4
Read 4 tweets
Maarten De Cock Profile picture
May 7, 2024
At the time when @WHO was assuring the world: “COVID-19 is NOT airborne”…

…a ‘return to office’-document for WHO staff in Geneva stated:

Ventilation system has been modified
• increased volume of external air
• no recycling of air
• filters rated as high as we can go…

🤔 Image
Source: ficsa.org/fileadmin/user…
I digged a little further in this matter, and look what I found:
Read 5 tweets

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