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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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    2. zeynep tufekci‏Verified account @zeynep 18 Apr 2020

      One study doesn't end all discussions but I'll take one shoe-leather epidemiology work like it over all the slick computer-generated simulations. This isn't vaporware, it's real. One restaurant, one asymptomatic person, only 11 in line of A/C out of 93 infected. Real data for us.

      8 replies 99 retweets 567 likes
      Show this thread
    3. zeynep tufekci‏Verified account @zeynep 18 Apr 2020

      *91

      5 replies 19 retweets 127 likes
      Show this thread
    4. zeynep tufekci‏Verified account @zeynep 19 Apr 2020

      zeynep tufekci Retweeted GinFuelledCassandra 💙

      Sadly, I don't think we can safely open indoor restaurants. The good news is one asymptomatic person did *not* infect 81 people in that restaurant. The bad news is *one* asymptomatic person infected ten people in line of air flow. No fever, can't screen.https://twitter.com/LadyBrienne1/status/1251853128498057218?s=20 …

      zeynep tufekci added,

      GinFuelledCassandra 💙 @LadyBrienne1
      Replying to @zeynep
      Yes masks can prevent transmission but how can that help in a restaurant where you can’t eat or drink with one on?
      18 replies 162 retweets 555 likes
      Show this thread
    5. zeynep tufekci‏Verified account @zeynep 20 Apr 2020

      People asking me questions: Study above strengthens case for masks. I try to read key papers. Still many unknowns. PERSONALLY, (not advice, just me!) I try to avoid spending time indoors with others. I feel increasingly comfortable outdoors. I wash my hands after opening boxes.

      5 replies 44 retweets 230 likes
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    6. zeynep tufekci‏Verified account @zeynep 20 Apr 2020

      We now know *for sure* mass transmission is possible indoors even without coughing/sneezing (pre/asymptomatic). We should all wear masks. I'm not yet seeing many cases of outdoors/surfaces but we should STILL be careful while we wait for studies. Absence of evidence isn't proof.

      8 replies 88 retweets 313 likes
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    7. zeynep tufekci‏Verified account @zeynep 20 Apr 2020

      Also, please note that coughing/sneezing are game changers to the distances we have all been told—especially sneezing—and that's another big reason to recommend universal masks, especially indoors. Many unknowns remain but this we know for sure: CROWDED INDOORS ARE HIGH RISK.

      11 replies 82 retweets 332 likes
      Show this thread
    8. zeynep tufekci‏Verified account @zeynep 20 Apr 2020

      zeynep tufekci Retweeted Justin Gray

      Georgia is considering opening retail, restaurants, nail salons, in-person worship and other indoor places next week. Please feel free to share the study on top of this thread with your friends there: one asymptomatic person in a restaurant infected 10.https://twitter.com/JustinGrayWSB/status/1252330712092590080 …

      zeynep tufekci added,

      Justin GrayVerified account @JustinGrayWSB
      Restaurants will be able to reopen to dine in service and theaters will be able to reopen on Monday April 27
      Show this thread
      8 replies 157 retweets 286 likes
      Show this thread
    9. zeynep tufekci‏Verified account @zeynep 20 Apr 2020

      Check this example flagged by @jeremyphoward in his super useful FAQ on masks. *94* out of 97 cases in a building worked on the same floor! It really suggests transmission through air is much more important than surfaces like elevator/doorknobs. Mask up! https://www.fast.ai/2020/04/20/skeptics-masks/ …pic.twitter.com/XVF9WeJbig

      13 replies 162 retweets 350 likes
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    10. zeynep tufekci‏Verified account @zeynep 21 Apr 2020

      Can't believe this gets published by the BBC, this late! If you're worried masks can be contaminated by other people's cough and sneezes, what do you think happens to YOUR MOUTH AND NOSE IF you aren't wearing a mask? The other two also make no sense.🙄 https://www.bbc.com/news/health-51205344 …pic.twitter.com/PaPnE1490S

      13 replies 69 retweets 268 likes
      Show this thread
      zeynep tufekci‏Verified account @zeynep 21 Apr 2020

      This "false sense of security" argument has been trotted out against many safety devices (seat-belts, helmets) and the evidence does not bear it out. No reason/data to think different for face masks. If anything, it's the other way around. See more here: https://www.preprints.org/manuscript/202004.0203/v1 …pic.twitter.com/oIPsKROAuH

      10:43 AM - 21 Apr 2020
      • 67 Retweets
      • 224 Likes
      • K6 233 😷 (((Stuart W))) 😷 Moan Chomsky Alan Jenkins DomJoao A_K_T Lucy Seton-Watson blastnost G.
      7 replies 67 retweets 224 likes
        1. New conversation
        2. zeynep tufekci‏Verified account @zeynep 21 Apr 2020

          zeynep tufekci Retweeted Respectable Ron

          This is actually a great question. A lot of evidence that talking/singing and maybe just breathing around people from close enough range is sufficient to transmit the virus—and if you have a mask on, the amount one sheds is cut down dramatically.https://twitter.com/LucidLeaguing/status/1252654696029982721 …

          zeynep tufekci added,

          Respectable Ron @LucidLeaguing
          Replying to @zeynep
          This might be a silly question, but how does an asymptomatic person produce viral droplets? Are coughing/sneezing not considered symptoms?
          10 replies 57 retweets 221 likes
          Show this thread
        3. zeynep tufekci‏Verified account @zeynep 21 Apr 2020

          zeynep tufekci Retweeted Lydia Bates

          Yep, this actually makes a lot more sociological sense, and the experience of Hong Kong/Taiwan etc. support this: widespread mask wearing *signal* solidarity and importance/reminder of the pandemic, and probably encourage *more* distancing/hygiene as well.https://twitter.com/lydiajo/status/1252656232193720320 …

          zeynep tufekci added,

          Lydia Bates @lydiajo
          Replying to @zeynep
          Purely anecdotally, I don't feel 'safer' wearing a mask (even if I am), I feel more aware of the risks around me. The fact that wearing a mask isn't comfortable is a constant reminder that my environment is potentially hazardous. My mask reminds me that things are not normal.
          10 replies 87 retweets 339 likes
          Show this thread
        4. zeynep tufekci‏Verified account @zeynep 24 Apr 2020

          Another crucial study showing how dangerous indoor situations can be. An alarming 94 (out of 216) people on the same floor in a call center in Korea got infected—an attack rate of 43.5%! But look at the schema. Most infections are on one side of the room. https://wwwnc.cdc.gov/eid/article/26/8/20-1274_article …pic.twitter.com/JQsVnDGtA2

          69 replies 1,178 retweets 1,790 likes
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        5. zeynep tufekci‏Verified account @zeynep 24 Apr 2020

          Also only three people on other floors infected despite "frequent contact in the lobby or elevators" (but not a lot of travel between floors and no shared restaurant). Much lower transmission also later to household members (16.2% attack rate). High risk for crowded indoors+time.pic.twitter.com/Jqbdnmrd78

          8 replies 112 retweets 326 likes
          Show this thread
        6. zeynep tufekci‏Verified account @zeynep 24 Apr 2020

          zeynep tufekci Retweeted zeynep tufekci

          Since people are looking at these studies today, I'm going put this paper here again (I'm a co-author). These studies increase the potential value of universal masking—especially indoors.https://twitter.com/zeynep/status/1249805628240953346 …

          zeynep tufekci added,

          zeynep tufekciVerified account @zeynep
          I'm a co-author (one among many) on this new paper reviewing and synthesizing the strong scientific evidence for how universal masking can reduce transmission (source control) and greatly dampen the spread of COVID-19. It's under review. Preprint here: https://www.preprints.org/manuscript/202004.0203/v1 … pic.twitter.com/Q6CFBfUNgc
          Show this thread
          3 replies 71 retweets 193 likes
          Show this thread
        7. zeynep tufekci‏Verified account @zeynep 24 Apr 2020

          zeynep tufekci Retweeted zeynep tufekci

          Also this article:https://twitter.com/zeynep/status/1253030146262605825 …

          zeynep tufekci added,

          zeynep tufekciVerified account @zeynep
          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
          Show this thread
          5 replies 44 retweets 143 likes
          Show this thread
        8. zeynep tufekci‏Verified account @zeynep 29 Apr 2020

          Another fascinating study. (Caution: preprint). There was one asymptomatic case in the second of two buses (59 and 67 passengers) to an outdoor worship event. Infections in bus one: zero; bus two: 23. Seven close contacts out of 172 at event also infected. https://www.researchgate.net/publication/340418430_Airborne_transmission_of_COVID-19_epidemiologic_evidence_from_two_outbreak_investigations/link/5e87b59ba6fdcca789f10d66/download …pic.twitter.com/wtYbQyM3s1

          11 replies 218 retweets 332 likes
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        9. zeynep tufekci‏Verified account @zeynep 29 Apr 2020

          This doesn't rule out other methods but seems clear that sharing an air pocket with a large number of people at length (the bus ride was 100 minutes) in a poorly-ventilated, indoors environment where people talk is a significant risk. The superspreader is the person and the room.

          7 replies 82 retweets 267 likes
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        10. zeynep tufekci‏Verified account @zeynep 29 Apr 2020

          zeynep tufekci Retweeted

          Not necessarily. Taiwan and Hong Kong have their very dense and heavily-used public transportation systems open (never closed them) and they are registering zero cases per day now. But everyone wears masks on public transit. https://twitter.com/slaughterdotcom/status/1255614534846500865 …

          zeynep tufekci added,

          This Tweet is unavailable.
          9 replies 34 retweets 110 likes
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        11. zeynep tufekci‏Verified account @zeynep 1 May 2020

          zeynep tufekci Retweeted Catherine Rampell

          So where is our contact tracing study for meatpacking plants? Is it the workplace or crowded living conditions of vulnerable workers like in Singapore? Both? We don’t have factory outbreaks reported elsewhere so what’s different? (Need data, not guesses).https://twitter.com/crampell/status/1256052475020312576 …

          zeynep tufekci added,

          Catherine RampellVerified account @crampell
          Nearly 900 workers at Tyson meat plant in Indiana test positive for coronavirus https://thehill.com/homenews/news/495564-nearly-900-workers-at-tyson-meat-plant-in-indiana-test-positive-for-coronavirus …
          6 replies 7 retweets 64 likes
          Show this thread
        12. zeynep tufekci‏Verified account @zeynep 17 May 2020

          zeynep tufekci Retweeted Anirban Maitra

          Adding to my thread on “maybe it’s the unventilated, air-conditioned room that’s the superspreader” research.https://twitter.com/aiims1742/status/1262113685331488771 …

          zeynep tufekci added,

          Anirban MaitraVerified account @Aiims1742
          14 people attended a company scientific advisory board mtg in Germany. The meeting (held in a conf room) lasted 9.5 hours followed by dinner. One presymptomatic #SARSCoV2 + attendee ended up infecting 11/13 in the group, with 58% having moderate #COVID19. https://wwwnc.cdc.gov/eid/article/26/8/20-1235_article …
          10 replies 96 retweets 216 likes
          Show this thread
        13. zeynep tufekci‏Verified account @zeynep 19 May 2020

          Arkansas: two people with COVID attended church events and infected *at least* 32 out of 92 (not everyone was tested because of guidelines at the time) leading to four deaths. The attack rate was as high as 35 cases out of 45 people for one of the events. https://www.cdc.gov/mmwr/volumes/69/wr/mm6920e2.htm?s_cid=mm6920e2_w …pic.twitter.com/42mkL70eDT

          6 replies 83 retweets 128 likes
          Show this thread
        14. zeynep tufekci‏Verified account @zeynep 25 May 2020

          New superspreader study from Hong Kong. They find 20% of infections are responsible for 80% of transmissions and a (k) of 0.45. Usual suspects: bars, restaurants and a wedding. Fourth new paper on SSE. (Authors @bencowling88 , @gmleunghku et al.). https://www.researchsquare.com/article/rs-29548/v1 …pic.twitter.com/ESvHKiJfPK

          3 replies 50 retweets 114 likes
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        15. End of conversation

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