Maarten De Cock @mdc_martinus
Joined January 2015-
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Indeed, this breakthrough study by @ukhadds has… “far-reaching implications for public health measures to help prevent airborne virus transmission.” The authorities and the @WHO can no longer look away from indoor CO2 monitoring. It turns out to be more important than ever.
Indeed, this breakthrough study by @ukhadds has… “far-reaching implications for public health measures to help prevent airborne virus transmission.” The authorities and the @WHO can no longer look away from indoor CO2 monitoring. It turns out to be more important than ever. https://t.co/LqiqPXzjXp
Unless we learn from the past, history will continue to repeat itself…
Latvia (population 1.9 M) monitors the indoor air quality of 14,000 classrooms in 875 schools. CO2 levels, temperature and relative humidity can be viewed freely online at: co2.mesh.lv It is one of the most advanced countries in this field and a source of inspiration.
It's the deceit that is so shocking. So many of them said one thing in public and another in private.
It's the deceit that is so shocking. So many of them said one thing in public and another in private.
Doing some double-checking of the citations in support of 'direct deposition', i.e., 'old droplets' sciencedirect.com/science/articl… This is citation No 99 from the WHO's new doc!
How much longer now, I wonder, until the @WHO will break their inexplicable silence on the public health importance of indoor CO2 monitoring?
How much longer now, I wonder, until the @WHO will break their inexplicable silence on the public health importance of indoor CO2 monitoring? https://t.co/nPeYAFs3BJ
Clean indoor air is now ~mandatory~ in all workplaces. This is a game changer for reducing demand on health services, & less school/work absences When will we see a public information campaign & some enforcement? @TheHSA @DeptEnterprise @peterburkefg hsa.ie/eng/topics/ven…
🔥Wow! This is a super interesting new study just published. This research demonstrates that CO₂ isn’t just a proxy for how well ventilated a room is… …the CO₂ level also directly influences how LONG the virus remains infectious in the air!
🔥Wow! This is a super interesting new study just published. This research demonstrates that CO₂ isn’t just a proxy for how well ventilated a room is… …the CO₂ level also directly influences how LONG the virus remains infectious in the air!
@erbrooker I've heard from so many people that CO2 they see in UK classrooms is around 3,000ppm. It's one of the reasons we measured the long decay at that level. At that level, in effect, the final 10-20% of the exhaled viral load just kind of stops decaying, and begins to accumulate.
1/ A very important finding from the Bristol group: higher CO2 indoors makes the SARS-CoV-2 virus survive much longer in air Makes ventilation more important, transmission goes approx. with its square, not just linearly
1/ A very important finding from the Bristol group: higher CO2 indoors makes the SARS-CoV-2 virus survive much longer in air Makes ventilation more important, transmission goes approx. with its square, not just linearly
Amazing work from top scientists! 👇
⚠️Very important study + thread by @ukhadds. CO2 conc. plays an even more important role in airborne transmission than previously thought. We knew for centuries that high indoor CO2 indicates poor ventilation, but it also extends the TIME viruses in aerosols remain infectious!
⚠️Very important study + thread by @ukhadds. CO2 conc. plays an even more important role in airborne transmission than previously thought. We knew for centuries that high indoor CO2 indicates poor ventilation, but it also extends the TIME viruses in aerosols remain infectious! https://t.co/brv6ofN99n
In terms of total aerosolized viral load, this means that after 40 minutes, more than 10x the amount of virus remains infectious in the air as a result of an increase in CO2 concentration. This will have a massive effect on the risk of transmission in a poorly ventilated space.
It has become popular to use CO2 monitors to estimate risk. This is based upon the idea that the CO2 informs about how well a space is ventilated. From our study, the results show that the levels of the CO2 will also inform about how long the virus remains infectious in the air.
We levitated the Delta variant in air that had various levels of CO2 and measured the infectivity. Any increase in the concentration of CO2 was found to result in an increase the virus’s aerostability. At higher concentrations, the difference became more significant.
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5.1M Followers 21K Following Exposing #HumanRights abuses around the world Join us to help end them! Staff: https://t.co/2JflyBeYHI HRW social accounts https://t.co/AIpbUxDqR4UN Human Rights @UNHumanRights
4.1M Followers 2K Following The United Nations #HumanRights office is led by High Commissioner @volker_turk. Follow us on FB, IG & Tiktok at unitednationshumanrights.Paul D. Thacker @thackerpd
44K Followers 1K Following Journalist; Former Investigator U.S. Senate; Former Safra Ethics Center, Harvard. https://t.co/aD6NkYzjqM@Desert_Goddess @DGBassani How these gadgets help (and empower) so many people to perceive the quality of their surrounding environment is going to be one of the bigger benefits coming out of the pandemic.
@1goodtern Thanks! I think this stuff is really important, and with a little help, managable for anyone to understand. Couple that with the fact people can use this information to help protect themselves, I feel like it's something I really ought to be doing.
@ukhadds Fascinating. Just fascinating. Reading all your replies to the comments has also been awesome. Thank you!
Sanjana Gajbhiye has written a good summary of our latest publication on the effect of CO2 on the airborne survival of #SARSCoV2. They also dive into some of the broader implications. Need to let their artist know that the virus doesn't fly freely, but is carried in an aerosol!!
Virus lifespan and transmission boosted by high CO2 levels: The findings reveal that carbon dioxide (CO2) levels play a critical role in the lifespan and transmission of airborne viruses. earth.com/news/virus-lif… #EarthDotCom #EarthSnap #Earth
@tgof137 "The Wuhan lab has many bat samples not yet worked out or results published."
@Rebecca21951651 "The Wuhan lab has many bat samples not yet worked out or results published."
It's the deceit that is so shocking. So many of them said one thing in public and another in private.
Susan R Weiss, Feb 13, 2020: "No credible evidence supporting claims of the laboratory engineering of SARS-CoV-2" tandfonline.com/doi/full/10.10… Susan R Weiss, Feb 21, 2020: "frightening to think it may have been engineered"
Susan R Weiss, Feb 13, 2020: "No credible evidence supporting claims of the laboratory engineering of SARS-CoV-2" tandfonline.com/doi/full/10.10… Susan R Weiss, Feb 21, 2020: "frightening to think it may have been engineered"
Congratulations Susan Weiss of @PennMedicine, newly inducted #NASmember! #NAS161 #microbiology
@WHO verwijst in nieuw rapport naar hoe COVID-19 voor de eerste maal op globale schaal de aandacht vestigde op het belang van binnenluchtkwaliteit thuis, in scholen, op werk, enz. in situaties van airborne overdracht van virussen. #lessonslearnt
BREAKING: WHO unequivocally uses the word “airborne” to depict infectious particles transmitted in the air (fits with “waterborne”, “foodborne” etc). Hopefully this easy-to understand terminology will be used throughout WHO. iris.who.int/handle/10665/3…
Doing some double-checking of the citations in support of 'direct deposition', i.e., 'old droplets' sciencedirect.com/science/articl… This is citation No 99 from the WHO's new doc!
@UnchartedWorlds Thanks! I'm glad you found the thread useful. Myself and a co-author of the article will be publishing a layman's version of the article on a popular science website next week. I'll link up to it on here so people can pass it around. Keep an eye out!
Been wanting to read this thread all day, but needed some concentration. Love it. The details emerging of how virus infectivity is impacted by humidity and CO2 in aerosol lifespan. Way more interesting than just a common or gardener decay curve. Splendid.
I’m excited to discuss our latest research on how ambient CO2 affects how long #SARSCoV2 remains infectious in air. We report that even subtle increases in CO2 affects both how long #COVIDisAirborne and transmission risk. Here’s a🧵going over the findings nature.com/articles/s4146…
Clean indoor air is now ~mandatory~ in all workplaces. This is a game changer for reducing demand on health services, & less school/work absences When will we see a public information campaign & some enforcement? @TheHSA @DeptEnterprise @peterburkefg hsa.ie/eng/topics/ven…
🔥Wow! This is a super interesting new study just published. This research demonstrates that CO₂ isn’t just a proxy for how well ventilated a room is… …the CO₂ level also directly influences how LONG the virus remains infectious in the air!
In terms of total aerosolized viral load, this means that after 40 minutes, more than 10x the amount of virus remains infectious in the air as a result of an increase in CO2 concentration. This will have a massive effect on the risk of transmission in a poorly ventilated space.
@ukhadds I think it’s called “Haddrell decay”!
@ukhadds @CleanAirClassrm @lzmddngs @PeteUK7 @Nat_E_Pearson @jneill @DamianHinds @ChildrensComm @Ninawildflower @SEGreenParty @GillianKeegan @SalWitcher fascinated with your work @ukhadds , this research is very important 👏🏻
@lzmddngs @Nat_E_Pearson @jneill @ukhadds @DamianHinds @ChildrensComm @Ninawildflower @SEGreenParty @SELibDems @CleanAirClassrm @Orla_Hegarty @GillianKeegan @SalWitcher The effect of CO2 on the infectivity/aerostability of SARS-CoV-2 is new though. The study has only just been published.
@moog77 Relatively speaking, the time taken for the CO2 in the puff to equilibrate with the room will be exceedingly fast (seconds, if not faster) compared to the CO2 evaporation from the droplet is a slow very process (10s of seconds to minutes).
Just a normal friday... our Nature comms paper is published and @ukhadds is going viral