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zeynep tufekci
zeynep tufekci
zeynep tufekci
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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. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      Much of the confusion about masks is because people conflate preventing infection (PPE for hospitals) with stopping transmission (cloth masks for all). Share this explainer I wrote with @jeremyphoward & @trishgreenhalgh with your mask-skeptical friends! https://www.theatlantic.com/health/archive/2020/04/dont-wear-mask-yourself/610336/ …pic.twitter.com/EuQJ4vqMYh

      22 replies 663 retweets 1,024 likes
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    2. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      Once we understand this distinction, that the point of masks for all isn't to act the way PPE does for hospital workers, much of the confusion disappears! Advice that applies to PPE (strict donning/doffing) don't really apply to masks for "source control"—stopping transmission.

      3 replies 53 retweets 169 likes
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    3. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      PPE for medical workers is *individual* protection. Masks for all is something different: it's a *public good*. It works only if almost everyone complies and once that happens it's a really powerful benefit for everyone. It's like clean air: need filters on all chimneys/exhausts.pic.twitter.com/UyZVbgUOed

      8 replies 104 retweets 238 likes
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    4. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      A public good like masks for all cannot be measured as an individual benefit. So we did some population level-modeling. If we can get 80+% of people to wear masks, we could help push R below 1. All models have limits (next tweet) but it's a strong argument! (Blue is R below 1).pic.twitter.com/4qqWj85Knw

      4 replies 110 retweets 207 likes
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    5. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      A few limits: Not all transmission happens where cloth masks would help. For example: household transmission, healthcare settings where transmission occurs despite PPE because medical workers do high-risk procedures AND masks don't replace the value of distancing! They add to it.

      2 replies 20 retweets 88 likes
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    6. zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      Reading so many articles which cited studies about protecting medical folks from infection to argue "masks are complicated" has been super frustrating. PPE *is* difficult to do correctly. Cloth masks for all to prevent transmission is different! THE DIFFERENCE IS NOT COMPLICATED.

      7 replies 32 retweets 138 likes
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      zeynep tufekci‏Verified account @zeynep 22 Apr 2020

      Folks, for clarity: As I stated in everything I have written to date, all this is a proposal to wear masks *in addition to* social distancing and hygiene measures. (@yaneerbaryam thinks people might misunderstand and I want to make sure!). MASKS ARE AN ADDITIONAL MEASURE. 😃

      2:04 PM - 22 Apr 2020
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      • Maelys #fbpa #fbppr #FBPPA🕷️😷💙 🌍 Janet hancock #FBPPR🇪🇺🐈😸🧵👩🏼‍🎨🌳🍃🟥🟨💙 Izzy Vlad Patryshev Dr. Arthur sandi u Angela King - Public Health & Philosophy Diary Of A Squirrel Lucie RigaRaï
      9 replies 38 retweets 171 likes
        1. zeynep tufekci‏Verified account @zeynep 23 Apr 2020

          Hospitals are very high-risk environments. Sick people concentrate there and staff can't distance. After Brigham and Women's Hospital required everyone, including patients, to wear masks staff infections dropped from 12-14 new infections per day to only 6. https://www.wbur.org/commonhealth/2020/04/23/brigham-and-womens-masks-infections …pic.twitter.com/Rrlj4CZu2T

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        2. Keni  💉 💉‏ @KeniLF 22 Apr 2020
          Replying to @zeynep @yaneerbaryam

          Thank you for this article. Social distancing, wearing masks, etc should be done. In a scenario where s/o is outside: if they come to an empty area, is it ok to temp. remove the mask to breathe easier? Or is there risk to those who later come by b/c of possibly "infected" air?

          1 reply 0 retweets 0 likes
        3. Alex Gračevski‏ @agracevski 22 Apr 2020
          Replying to @KeniLF

          If you are outside and alone, you can take the mask off. Chances of airborne transmission in those circumstances are incredibly low.

          1 reply 0 retweets 1 like
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        1. Yaneer Bar-Yam‏ @yaneerbaryam 22 Apr 2020
          Replying to @zeynep

          Thanks!!

          0 replies 0 retweets 1 like
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        1. David Chase‏ @Dr2chase 22 Apr 2020
          Replying to @zeynep @yaneerbaryam

          We have a really bad case of silver-bullet-itis. There's a paper by Ebola doctors from the field grumbling about institutional focus on beating the virus instead of keeping infected people alive. E.g.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479704/ …

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        1. Evil Malc‏ @sleekimager 22 Apr 2020
          Replying to @zeynep @greg_doucette @yaneerbaryam

          You make grotesque oversimplifications: masks do absolutely nothing if you aren't infected, so your analogy about exhaust filters is bunk. And if one infected person uses a mask and thereby doesn't infect someone else, that is an individual good, even if no-one else wears one.

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        1. Evil Malc‏ @sleekimager 22 Apr 2020
          Replying to @zeynep @greg_doucette @yaneerbaryam

          And, yeah, masks are an incremental additional benefit, but you have no idea how much it yields. It may be a vanishingly small improvement.

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        2. Evil Malc‏ @sleekimager 22 Apr 2020
          Replying to @zeynep @greg_doucette @yaneerbaryam

          What masks really achieve is the pandemic equivalent of security theater: theoretically beneficial, but the main goal is to deliver an idea: "take care, we're in a health emergency".

          1 reply 0 retweets 1 like
        3. Jonathan Mesiano-Crookston /Denial Is Bad Strategy‏ @jmcrookston 23 Apr 2020
          Replying to @sleekimager @zeynep and

          No. 1918 masks helped with flu: https://jamanetwork.com/journals/jama/article-abstract/218704 … 2004 WHO rec masks for avian flu: https://wwwnc.cdc.gov/eid/article/12/6/05-1468_article#r5 … 2006 CDC followed same https://dx.doi.org/10.3201/eid1206.051468 … 2020: masks useful for exhaled air https://www.nature.com/articles/s41591-020-0843-2 … 1/

          1 reply 0 retweets 0 likes
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        2. Colman‏ @colmanareilly 23 Apr 2020
          Replying to @zeynep @yaneerbaryam

          That the WHO and other experts are worried will undermine the other more important measures, as anecdote also indicates. But masks give a sense of control and invulnerability so they’re a popular suggestion. Worthwhile when social distancing not possible, perhaps.

          2 replies 0 retweets 0 likes
        3. zeynep tufekci‏Verified account @zeynep 23 Apr 2020
          Replying to @colmanareilly @yaneerbaryam

          No, social science research is clear that safety devices do not create such "risk compensation" at the population level (this has been suggested and studied to death at for seatbelts, helmets etc.). That said, I agree of course we should keep the messaging clear: keep distance!

          1 reply 0 retweets 5 likes
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