Why this really matters. This isn’t quibbles at the margins. Its an incorrect paradigm being replaced. Some things overlap between the two, but not everything does and thus there will likely be many real changes going forward that affect *other* respiratory pathogens as well.https://twitter.com/Don_Milton/status/1382891848356741125 …
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Another great paper, making the case for the predominance of airborne transmission and, crucially, focusing on practical recommendations for buildings with a realistic & nuanced discussion of the trade-offs. Three papers in key medical journals in a week! https://twitter.com/j_g_allen/status/1383073549380882438 …pic.twitter.com/cX8TGGrb07
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zeynep tufekci Retweeted
Our
@TheLancet paper is a work of synthesis in the service of a causal framework that best explains observed phenomenon over a year of intense data collection. I'd be interested to read a case for "it's predominantly and/or largely droplets" fits the data. https://twitter.com/dylanhmorris/status/1382827972239843330 …zeynep tufekci added,
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I don't mean the above as lip service. I don't see how the totality of evidence works well for an explanation that differs fundamentally, but I'd be super interested in reading that framework: not as an assumption in textbooks but as how it fits the full range observational data.
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zeynep tufekci Retweeted ɪᴀɴ ᴍ. ᴍᴀᴄᴋᴀʏ, ᴘʜᴅ 🦠 🤧 🧬 🥼 🦟 🧻 🧙♂️
I want to add two things that I see confused/claimed. First, see this thread and the paper itself where we explicitly discuss whether the predominance of close contact transmission implies gravity-driven droplet transmission is primary or even a lot.https://twitter.com/MackayIM/status/1383370706843410433 …
zeynep tufekci added,
ɪᴀɴ ᴍ. ᴍᴀᴄᴋᴀʏ, ᴘʜᴅ 🦠 🤧 🧬 🥼 🦟 🧻 🧙♂️Verified account @MackayIMThe fact that most respiratory virus infections happen when people spend time close together, doesn't automatically imply ballistic droplets are the main route of transmission. I'd just like this said more clearly. There are those who can't grasp this orShow this thread1 reply 9 retweets 46 likesShow this thread -
This paper looks at totality of observed data and evidence from past year, and argues why aerosol-transmission as primary route can parsimoniously explain it all, while droplets as primary route contradicts key parts of the evidence. I'd love to read the opposite case if written.
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Second: I keep seeing claims that if it's aerosols, that means cloth or surgical masks are useless, and also what's called "droplet precautions" are useless. The aerosol experts have written so many papers on why that's not the case, and, in any case, that's not what we observe.
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The paper, while word-limited, does go into both of these topics, but as with any shift like this, I agree the implications deserves more attention/explanation, and hopefully more soon, partly because part of the problem were some flawed assumptions in multiple directions.
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And, this doesn't bind my co-authors, but I think our evidence-base is stronger for discriminating between droplets vs. aerosols, but not as much for fomites especially through resuspension etc. No, not washing groceries but.. I'd wipe down high-touch surfaces in crowded indoors.
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zeynep tufekci Retweeted Борис Баденов
We briefly address this (word limit!
) but it's not correct to assume that airborne transmission necessitates either a high R0 like measles or even a uniform transmission pattern. Tuberculosis is airborne but has lowish R0—but likely also overdispersion!https://twitter.com/bobby_dread/status/1383787373134184450 …zeynep tufekci added,
Борис Баденов @BorisBadenov999Replying to @zeynep @jljcoloradoWhat lesson, may I ask, stems from the Diamond Princess cruise ship then, relating to your findings? If indoor aerosol transmission is predominant, why didn’t everyone get it? T-cell immunity & co-morbidity factors? Thank you. https://en.m.wikipedia.org/wiki/COVID-19_pandemic_on_Diamond_Princess … pic.twitter.com/nmDPZsBnTd4 replies 5 retweets 57 likesShow this thread
zeynep tufekci Retweeted Linsey Marr
Another good addition for people following this topic is Dr. @linseymarr, a true pioneer in this field (her latest in @bmj_latest, also out this week(!), was titled "Covid-19 has redefined airborne transmission").https://twitter.com/linseymarr/status/1382842521286549508 …
zeynep tufekci added,
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zeynep tufekci Retweeted Linsey Marr
And just putting this thread here so people can get some context of how difficult it has been, for so long, to make progress.https://twitter.com/linseymarr/status/1383066390136041477 …
zeynep tufekci added,
Linsey MarrVerified account @linseymarrReplying to @zeynep @j_g_allen and 4 othersYES! Welcome to my world for the past 13 years. So incredibly at odds with current scientific understanding! I have been going around saying that the medical textbooks are wrong, and people think I'm weird...which I am.2 replies 9 retweets 83 likesShow this thread -
Feels like an inflection point. Do read what the article linked by Dr. Karan argues: that short-range (close contact) transmission of respiratory infections is also PRIMARILY aerosols—goes against decades of claims of aerosols only/mostly being long-range. https://twitter.com/AbraarKaran/status/1384240928873844742 …pic.twitter.com/xvf2bQeES8
8 replies 52 retweets 146 likesShow this thread
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