Otto Kolbl
@ottokolbl.bsky.social
Researcher UNIL on health issues (now #MECFS, #nextPandemic), related media reporting; in 2020 German Interior Min. COVID-19 task force. Works with methodological concept "information transmission chain". I am new here, but here to stay!
Bin kein Experte, aber ich glaube, da kann man 15 oder einen anderen Zwischenwert angeben.
September 17, 2025 at 8:59 PM
Bin kein Experte, aber ich glaube, da kann man 15 oder einen anderen Zwischenwert angeben.
Massives Titan, also nicht nur Titanbeschichtung, sondern ganz aus Titan. Unverwüstlich, haftet nicht, kann irgendwie gereinigt werden, aber angenehm leicht.
September 17, 2025 at 8:58 PM
Massives Titan, also nicht nur Titanbeschichtung, sondern ganz aus Titan. Unverwüstlich, haftet nicht, kann irgendwie gereinigt werden, aber angenehm leicht.
There is so much I don't understand in all of this. Always happy to find people to discuss these issues in order, who knows, maybe to find some constructive solutions.
September 16, 2025 at 11:59 PM
There is so much I don't understand in all of this. Always happy to find people to discuss these issues in order, who knows, maybe to find some constructive solutions.
We brush our teeth each day. Some rigorous research indicates that with even less time and money we dedicate to brushing our teeth, we could use a nasal spray 3x a day and get a good protection against many colds, including COVID-19 and probably H5N1. Nobody talks about this. 2/
September 16, 2025 at 11:59 PM
We brush our teeth each day. Some rigorous research indicates that with even less time and money we dedicate to brushing our teeth, we could use a nasal spray 3x a day and get a good protection against many colds, including COVID-19 and probably H5N1. Nobody talks about this. 2/
But what is behind all of this? "Collateral Global" claims to be preoccupied by the collateral damage due to the "policy responses". Of course lockdowns, school closures and gathering limitations have a massive socioeconomic impact. But face masks do not. Other measures even less. 1/
September 16, 2025 at 11:50 PM
But what is behind all of this? "Collateral Global" claims to be preoccupied by the collateral damage due to the "policy responses". Of course lockdowns, school closures and gathering limitations have a massive socioeconomic impact. But face masks do not. Other measures even less. 1/
If instead, we continue relying on various types of study, where the "raw" efficiency factor can only be estimated indirectly with various assumptions, the universities with most resources and the highest prestige will win: Oxford, Cochrane, etc. "Face masks don't work" will be the outcome. 6/6
September 16, 2025 at 4:47 PM
If instead, we continue relying on various types of study, where the "raw" efficiency factor can only be estimated indirectly with various assumptions, the universities with most resources and the highest prestige will win: Oxford, Cochrane, etc. "Face masks don't work" will be the outcome. 6/6
This factor must be evaluated in a real community, where the members help and motivate each other to get the best result. Nobody does this. Every single study design (except lab/mechanistic) only provides strongly diluted factors (OR or RR). We need to discuss and implement this very fast. 5/
September 16, 2025 at 4:47 PM
This factor must be evaluated in a real community, where the members help and motivate each other to get the best result. Nobody does this. Every single study design (except lab/mechanistic) only provides strongly diluted factors (OR or RR). We need to discuss and implement this very fast. 5/
We need a precise quantification of the "raw" efficiency of face masks. For example: in a classroom, if everybody wears a face mask, by what factor is infection risk reduced? This is what authorities need to decide: school closures or not? Nobody can come up with this factor. 4/
September 16, 2025 at 4:47 PM
We need a precise quantification of the "raw" efficiency of face masks. For example: in a classroom, if everybody wears a face mask, by what factor is infection risk reduced? This is what authorities need to decide: school closures or not? Nobody can come up with this factor. 4/
The only study design I can come up with is conducting RCTs in a controlled environment where the participants wear masks the whole day, unless otherwise protected against infection (e.g. sleeping in separate rooms or with filtered air). Military bases could be a possibility. 3/
September 16, 2025 at 4:47 PM
The only study design I can come up with is conducting RCTs in a controlled environment where the participants wear masks the whole day, unless otherwise protected against infection (e.g. sleeping in separate rooms or with filtered air). Military bases could be a possibility. 3/
The impact is diluted for example when HCW wear face masks when caring for certain patients, but not otherwise. This kind of RCTs will never tell us about the real impact of masks. But observational, mechanistic and epidemiological studies cannot achieve this either. 2/
September 16, 2025 at 4:47 PM
The impact is diluted for example when HCW wear face masks when caring for certain patients, but not otherwise. This kind of RCTs will never tell us about the real impact of masks. But observational, mechanistic and epidemiological studies cannot achieve this either. 2/
I entirely agree with you. We must "systematically synthesizes evidence from multiple designs". However, RCTs are an important tool. I claim that it is not difficult to design RCTs which rigorously evaluate the efficacy of face masks, without diluting their impact. 1/
September 16, 2025 at 4:47 PM
I entirely agree with you. We must "systematically synthesizes evidence from multiple designs". However, RCTs are an important tool. I claim that it is not difficult to design RCTs which rigorously evaluate the efficacy of face masks, without diluting their impact. 1/
This is the planned, coordinated and publicly revealed plan to dismantle all forms of prevention and all measures against deadly pandemics. By University of Oxford Centre for Evidence-Based Medicine, Cochrane and many other universities. People must get sick, then doctors will (maybe) cure them. 3/3
September 16, 2025 at 11:52 AM
This is the planned, coordinated and publicly revealed plan to dismantle all forms of prevention and all measures against deadly pandemics. By University of Oxford Centre for Evidence-Based Medicine, Cochrane and many other universities. People must get sick, then doctors will (maybe) cure them. 3/3
Tom Jefferson and Carl Henegan (Oxford CEBM) talk in the video mentioned above about John Snow removing the pump handle: it was an empty gesture, useless, the cholera outbreak was already over. What goes up will come down again. The Youtube link starts at that moment: 2/
youtu.be/K_YWFvJVdeA?...
youtu.be/K_YWFvJVdeA?...
Evidence Based Medicine: Why it’s important and why it's controversial
YouTube video by Kellogg College, University of Oxford
youtu.be
September 16, 2025 at 11:52 AM
Tom Jefferson and Carl Henegan (Oxford CEBM) talk in the video mentioned above about John Snow removing the pump handle: it was an empty gesture, useless, the cholera outbreak was already over. What goes up will come down again. The Youtube link starts at that moment: 2/
youtu.be/K_YWFvJVdeA?...
youtu.be/K_YWFvJVdeA?...
Hi everybody! I just saw the John Snow Project, where some of you are active:
johnsnowproject.org
This is definitely the kind of project we need to move prevention of COVID-19 and a better handling of the next pandemic forward. 1/
johnsnowproject.org
This is definitely the kind of project we need to move prevention of COVID-19 and a better handling of the next pandemic forward. 1/
Home
Everything you need to know about COVID-19
johnsnowproject.org
September 16, 2025 at 11:52 AM
Hi everybody! I just saw the John Snow Project, where some of you are active:
johnsnowproject.org
This is definitely the kind of project we need to move prevention of COVID-19 and a better handling of the next pandemic forward. 1/
johnsnowproject.org
This is definitely the kind of project we need to move prevention of COVID-19 and a better handling of the next pandemic forward. 1/
* by @juchti.bsky.social and me. One day, I will learn to deal productively with the fact that people might have different names according to the social media platforms.
September 15, 2025 at 8:15 PM
* by @juchti.bsky.social and me. One day, I will learn to deal productively with the fact that people might have different names according to the social media platforms.
An important review by Ungrin, @gosiagasperophd.bsky.social et al. of Loeb 2022. Some issues with Loeb 2022 are obvious, like the fact that the trial in Egypt took place during the Omicron wave, when risk of infection outside hospital was huge. This review find many more:
osf.io/preprints/me...
osf.io/preprints/me...
OSF
osf.io
September 15, 2025 at 5:42 PM
An important review by Ungrin, @gosiagasperophd.bsky.social et al. of Loeb 2022. Some issues with Loeb 2022 are obvious, like the fact that the trial in Egypt took place during the Omicron wave, when risk of infection outside hospital was huge. This review find many more:
osf.io/preprints/me...
osf.io/preprints/me...
For an investigation of face masks in the COVID-19 pandemic, from before the pandemic until now, have a look at the following article, by @CK65375 and me. Millions of deaths because in January 2020, WHO suddenly claimed face masks do not work. 21/21
ottokolbl.medium.com/how-face-mas...
ottokolbl.medium.com/how-face-mas...
How Face Masks, instead of Saving Us, Became a Sign of Failure, Stigma and Division
By Otto Kölbl and Christina Koch
ottokolbl.medium.com
September 15, 2025 at 4:57 PM
For an investigation of face masks in the COVID-19 pandemic, from before the pandemic until now, have a look at the following article, by @CK65375 and me. Millions of deaths because in January 2020, WHO suddenly claimed face masks do not work. 21/21
ottokolbl.medium.com/how-face-mas...
ottokolbl.medium.com/how-face-mas...
How can @UniofOxford @CebmOxford, @cochranecollab tolerate that people holding such extremist views write highly influential guidelines and the Cochrane reviews which are supposed to implement them? When so many human lives are at stake? And how can we tolerate this? 20/
September 15, 2025 at 4:57 PM
How can @UniofOxford @CebmOxford, @cochranecollab tolerate that people holding such extremist views write highly influential guidelines and the Cochrane reviews which are supposed to implement them? When so many human lives are at stake? And how can we tolerate this? 20/
Worse: in the video already mentioned above, Tom Jefferson claims that all Cochrane reviews, incl. pre-pandemic, come "to the same conclusion". This is dishonest. The pre-pandemic reviews conclude that face masks are "the best performing intervention".19/
doi.org/10.1002/1465...
doi.org/10.1002/1465...
Physical interventions to interrupt or reduce the spread of respiratory viruses - Jefferson, T - 2011 | Cochrane Library
Select your preferred language for Cochrane reviews and other content. Sections without translation will be in English.
doi.org
September 15, 2025 at 4:57 PM
Worse: in the video already mentioned above, Tom Jefferson claims that all Cochrane reviews, incl. pre-pandemic, come "to the same conclusion". This is dishonest. The pre-pandemic reviews conclude that face masks are "the best performing intervention".19/
doi.org/10.1002/1465...
doi.org/10.1002/1465...
One example: "Synchronicity of Deaths in the Pandemic", i.e. the fact that COVID-19 mortality peaks in all British counties at the same time in spring 2020. Easy to explain. Measures. But if you deny the efficiency of all measures, →mystery →QAnon. 18/
trusttheevidence.substack.com/p/synchronic...
trusttheevidence.substack.com/p/synchronic...
Synchronicity of Deaths in the Pandemic
Analysing the simultaneous occurrence of deaths
trusttheevidence.substack.com
September 15, 2025 at 4:57 PM
One example: "Synchronicity of Deaths in the Pandemic", i.e. the fact that COVID-19 mortality peaks in all British counties at the same time in spring 2020. Easy to explain. Measures. But if you deny the efficiency of all measures, →mystery →QAnon. 18/
trusttheevidence.substack.com/p/synchronic...
trusttheevidence.substack.com/p/synchronic...
3) More worrying: Jefferson (author Cochrane reviews) and Heneghan (director Oxford University Center for Evidence-Based Medicine) have got a blog (behind a paywall, I had to pay Euro 70.- to these people). In one word: QAnon level. Really scary. 17/
trusttheevidence.substack.com
trusttheevidence.substack.com
Trust the Evidence | Carl Heneghan | Substack
Informing health decisions by separating evidence from opinion. Click to read Trust the Evidence, a Substack publication with tens of thousands of subscribers.
trusttheevidence.substack.com
September 15, 2025 at 4:57 PM
3) More worrying: Jefferson (author Cochrane reviews) and Heneghan (director Oxford University Center for Evidence-Based Medicine) have got a blog (behind a paywall, I had to pay Euro 70.- to these people). In one word: QAnon level. Really scary. 17/
trusttheevidence.substack.com
trusttheevidence.substack.com
2) The medical community seems to be quite hostile to prevention which does not require the intervention of a doctor. No funding from big Pharma, no income from consultations. Just putting this here, without references. All purely speculative. 16/
September 15, 2025 at 4:57 PM
2) The medical community seems to be quite hostile to prevention which does not require the intervention of a doctor. No funding from big Pharma, no income from consultations. Just putting this here, without references. All purely speculative. 16/
1) Researchers in medical science strictly follow a pattern suitable for drug research. Prescribe a certain drug and see whether it is efficient. Drugs are standardized. No specific skill required to take a pill. Participants want to be cured. Nobody can see they took a pill. 15/
September 15, 2025 at 4:57 PM
1) Researchers in medical science strictly follow a pattern suitable for drug research. Prescribe a certain drug and see whether it is efficient. Drugs are standardized. No specific skill required to take a pill. Participants want to be cured. Nobody can see they took a pill. 15/
How is it that neither the authors (Loeb et al., Radonovich et al.), nor the peer reviewers, nor the Cochrane study authors and reviewers, nor others in the academic community see the problems? Several factors, which must be analyzed through rigorous academic research. 14/
September 15, 2025 at 4:57 PM
How is it that neither the authors (Loeb et al., Radonovich et al.), nor the peer reviewers, nor the Cochrane study authors and reviewers, nor others in the academic community see the problems? Several factors, which must be analyzed through rigorous academic research. 14/
Another issue: What is a surgical mask? According to one study, several surgical masks commonly used in the UK healthcare sector were analyzed regarding filtration efficiency of bioaerosols. Result: Reduction by a factor 1.1 to 55, average 6. 13/
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Effectiveness of surgical masks against influenza bioaerosols
Most surgical masks are not certified for use as respiratory protective devices (RPDs). In the event of an influenza pandemic, logistical and practica…
www.sciencedirect.com
September 15, 2025 at 4:57 PM
Another issue: What is a surgical mask? According to one study, several surgical masks commonly used in the UK healthcare sector were analyzed regarding filtration efficiency of bioaerosols. Result: Reduction by a factor 1.1 to 55, average 6. 13/
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...