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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. zeynep tufekci‏Verified account @zeynep 21 Jan 2021

      zeynep tufekci Retweeted Charlie Warzel

      Question re:K/N95 re-use. We need official/authoritative guidance. Use it carefully and let it sit for a few days in a paper bag or a non-airtight box disinfect (don't wash or heat) and keep using it is my unofficial guidance based on this paper. Anyone? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7724761/ …https://twitter.com/cwarzel/status/1352299319617982465 …

      zeynep tufekci added,

      Charlie WarzelVerified account @cwarzel
      i'm guessing there's some nuance here...like you need to let it rest/disinfect after being in public with it...but is there...a number of uses after which it becomes less effective? i feel like an idiot for not knowing the answer to this 10 months in!
      Show this thread
      37 replies 71 retweets 319 likes
      Show this thread
      zeynep tufekci‏Verified account @zeynep 21 Jan 2021

      Needless to say this is for general public (!) not any healthcare setting (!) or anyone doing anything high-risk. Your grocery shopping trip mask. Loss of electrostatic charge doesn't seem to drop filtration much, and sanitize hands before putting on/taking off seems enough.

      9:44 AM - 21 Jan 2021
      • 6 Retweets
      • 113 Likes
      • Heather Evans Gail Nevin Elli Caroline Morganti 🏴Dendan Setia🏳️ (実は Нина だ) Dr. M. Tullius "No Mercy for Seditionists" Cicero rsp1661 Nilgun Mark Alonge
      15 replies 6 retweets 113 likes
        1. zeynep tufekci‏Verified account @zeynep 21 Jan 2021

          zeynep tufekci Retweeted

          Yes, I'm basing the above in what we've seen done in healthcare setting and recommendations in other countries but I'M REALLY LOOKING FORWARD TO LINKING TO CDC ADVICE ON THIS. Please no more of us trying to reason things out, more official guidance. 😀 https://twitter.com/1LoafOfMeat/status/1352313760862580736 …

          zeynep tufekci added,

          This Tweet is unavailable.
          5 replies 6 retweets 88 likes
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        1. Jaime Green‏ @jaimealyse 21 Jan 2021
          Replying to @zeynep

          My question is does the filter material get… clogged? With dust or particles or whatnot.

          0 replies 0 retweets 0 likes
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        2. Megan McArdle‏Verified account @asymmetricinfo 21 Jan 2021
          Replying to @zeynep

          My understanding is that it stops working when the filter gets so clogged it becomes hard to breathe. Presuming you haven't washed it, or whatever. There were also studies suggesting an oven on warm for 1/2 hour sterilizes pretty well.

          3 replies 0 retweets 2 likes
        3. zeynep tufekci‏Verified account @zeynep 21 Jan 2021
          Replying to @asymmetricinfo

          I don't think regular people need to sterilize them, to be honest. I'm worried there isn't enough research on the sterilization methods at home. Never had the too-clogged feeling. Presumably there is a limit? I'd like lab-tested guidance.

          5 replies 0 retweets 8 likes
        4. Show replies
        1. Lisa M‏ @ColumbusNYC 21 Jan 2021
          Replying to @zeynep

          I've been wearing a KN95 with a cloth mask over it when I go to a doctor or to the grocery store. I then leave it in a paper bag for a few days and use a different one. When it feels stretched out, dump it.

          0 replies 0 retweets 0 likes
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        2. Charlie Warzel‏Verified account @cwarzel 21 Jan 2021
          Replying to @zeynep

          Charlie Warzel Retweeted Temptation Put

          like, when i see this... it’s like uhhh what?!https://twitter.com/AmalgamatedBob/status/1352310538265477127 …

          Charlie Warzel added,

          Temptation Put @AmalgamatedBob
          Replying to @cwarzel
          Single use, and they're only really effective under a fairly rigorous protocol: wash hands before use, tight fit, never touch the mask while wearing, on/off via the straps only, don't let the mask touch your face when removing, wash hands after removal and disposal, etc.
          2 replies 0 retweets 5 likes
        3. zeynep tufekci‏Verified account @zeynep 21 Jan 2021
          Replying to @cwarzel

          That's a higher standard than what some healthcare workers do even if they are intubating COVID patients daily... (They reuse masks). (Intubation is an aerosol-generating process and only done on very sick patients). That's why I'd like *sensible* advise for the general public.

          1 reply 0 retweets 18 likes
        4. Show replies
        1. David Penfold  🌳  🌳  🌳‏ @PenfoldDavid 21 Jan 2021
          Replying to @zeynep

          I used the same four FFP2 masks for months on my twice-weekly shopping trips. I've now got 24 more. My favourites are the ones with proper elastics round the back of the head and that don't make you look like a duck.

          0 replies 0 retweets 0 likes
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        1. gggg‏ @schnitzel_louie 21 Jan 2021
          Replying to @zeynep

          if you can German then here's the latest advice: it takes 7 days at room temp for the virus to dissipate, so 7 masks aired for 7 days after daily use is feasible https://www.fh-muenster.de/gesundheit/forschung/forschungsprojekte/moeglichkeiten-und-grenzen-der-eigenverantwortlichen-wiederverwendung-von-ffp2-masken-im-privatgebrauch/index.php …

          0 replies 0 retweets 0 likes
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        2. Jeremy Howard‏ @jeremyphoward 21 Jan 2021
          Replying to @zeynep

          I've read of some filters that lose nearly all their filtration capability when they lose their electrostatic charge. It depends on the material. I believe that nanofibers don't depend on electrostatic charge so might be preferred?...

          1 reply 0 retweets 0 likes
        3. zeynep tufekci‏Verified account @zeynep 21 Jan 2021
          Replying to @jeremyphoward

          So the papers linked at top says no, but I'd like official guidance exactly for this reason!

          2 replies 0 retweets 4 likes
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