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zeynep's profile
zeynep tufekci
zeynep tufekci
zeynep tufekci
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@zeynep

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zeynep tufekciVerified account

@zeynep

Complex systems, wicked problems. Society, technology, science and more. @UNC professor. @NYTimes columnist. My newsletter is @insight: http://www.theinsight.org 

floating in a most peculiar way
theinsight.org
Joined August 2009

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    1. Prof. *Dr.* Nausheen R. Shah‏ @nausheenrshah 21 Dec 2021
      Replying to @Merz @jljcolorado and

      Prof. *Dr.* Nausheen R. Shah Retweeted Prof. Jose-Luis Jimenez

      Drifting off-topic. We're talking physics here. What is the difference between outside and inside?https://twitter.com/jljcolorado/status/1473467587984044038?t=1JgwrcS45VDqwR0ng0NlWQ&s=19 …

      Prof. *Dr.* Nausheen R. Shah added,

      Prof. Jose-Luis JimenezVerified account @jljcolorado
      Replying to @PrasadKasibhat1 @Merz and 10 others
      And here you see a very careful study, from Yuguo Li who sits in @WHO committees. When talking, the short-range airborne (aerosols) is dominant over large droplets at all usual conversational distances. Higher distance would favor aerosols even more https://www.sciencedirect.com/science/article/pii/S0360132320302183 … pic.twitter.com/Oaptah15AM
      1 reply 0 retweets 16 likes
    2. Alex Merz‏ @Merz 21 Dec 2021
      Replying to @nausheenrshah @jljcolorado and

      The observation is that outdoor xmission is about 20x lower than indoor. Dr. Jimenez argues that transmission indoors and out would be equally efficient in and out for droplet xmission. But time, frequency, geometry will all influence droplet xmission. Not only distance.

      1 reply 0 retweets 2 likes
    3. Prof. *Dr.* Nausheen R. Shah‏ @nausheenrshah 21 Dec 2021
      Replying to @Merz @jljcolorado and

      The *original* point was about the dominance of aerosols. Physics settles that question. I don't care what you call them, as long as people understand what you mean. Relevant: what you need to mitigate. Hence stress on N95 mask, air purification/ventilation etc.

      2 replies 2 retweets 49 likes
    4. Alex Merz‏ @Merz 21 Dec 2021
      Replying to @nausheenrshah @jljcolorado and

      Those arguments are a lot stronger. I agree.

      1 reply 0 retweets 2 likes
    5. Alex Merz‏ @Merz 21 Dec 2021
      Replying to @Merz @nausheenrshah and

      And we are 100% (or nearly so) in agreement re. broadly deployed mitigations.

      2 replies 0 retweets 2 likes
    6. Prof. *Dr.* Nausheen R. Shah‏ @nausheenrshah 21 Dec 2021
      Replying to @Merz @jljcolorado and

      Ok. But again with the qualifier!! What do you not agree with?

      1 reply 0 retweets 10 likes
    7. Alex Merz‏ @Merz 21 Dec 2021
      Replying to @nausheenrshah @jljcolorado and

      I think we might disagree about the importance of droplet mitigations *in addition* to aerosol mitigations (some of which overlap) in congregate and clinical settings. I don't think the half-assed droplet mitigations in, e.g., supermarkets, can make any difference at all.

      2 replies 0 retweets 2 likes
    8. Prof. *Dr.* Nausheen R. Shah‏ @nausheenrshah 21 Dec 2021
      Replying to @Merz @jljcolorado and

      You mean face screens/plexiglass barriers? In clinical settings I see value in face screens. But generally plexiglass barriers are bad idea. They tend to accumulate stuff behind them (fluid dynamics). There's a bunch of CFD visuals for that, but also similar effect as snow banks

      2 replies 0 retweets 2 likes
    9. Prof. *Dr.* Nausheen R. Shah‏ @nausheenrshah 21 Dec 2021
      Replying to @nausheenrshah @Merz and

      So OMG I think we're actually in 💯 agreement here 🎉

      1 reply 0 retweets 3 likes
    10. zeynep tufekci‏Verified account @zeynep 21 Dec 2021
      Replying to @nausheenrshah @Merz and

      Which makes what Kim and the others have been saying the whole time correct. The WHO committees literally yelled at them, and a whole bunch of scientists, who had gathered to politely to point all this out. But yeah, physics is physics.

      2 replies 4 retweets 17 likes
      zeynep tufekci‏Verified account @zeynep 21 Dec 2021
      Replying to @zeynep @nausheenrshah and

      (Also note overdispersion was observed from the earliest epidemiology, so superspreading was always crucial.)

      9:07 PM - 21 Dec 2021
      • 1 Retweet
      • 4 Likes
      • Karuna Satov Ken Smith 💉💉💉😷 Prof. Jose-Luis Jimenez Prof. *Dr.* Nausheen R. Shah
      0 replies 1 retweet 4 likes

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