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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. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      Prof. Jose-Luis Jimenez Retweeted Ryan Davis

      6/ We have written an article on history. Started by trying to figure out where 5 micron error for droplet / aerosol boundary came from, since physics tells us it is ~100 um. E.g. see this video of 50 micron particles, ain't falling to the ground quickly:https://twitter.com/MicroLevitator/status/1283556047471378432 …

      Prof. Jose-Luis Jimenez added,

      0:05
      Ryan Davis @MicroLevitator
      Much discussion lately in aerosol/disease transmission communities about the “5 micron cutoff” where droplets supposedly fall to ground w/in 1-2 m. @jljcolorado and @linseymarr has suggested ~50 microns. Here’s some video evidence for that. 50 micron droplets wafting in lab... pic.twitter.com/5SrE7GeKDF
      Show this thread
      4 replies 108 retweets 515 likes
      Show this thread
    2. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      7/ But as we investigated the origins of the 5 micron error, we learned a lot more about the history of infectious disease transmission, which is the root of the resistance and delays of @WHO and @CDCGov. As we'll see, the creation of the @CDCgov is deeply embedded in the errors!

      1 reply 63 retweets 459 likes
      Show this thread
    3. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      8/ Our preprint on the history can be read here. Written by @katierandall, @EThomasEwing, @linseymarr, Lydia Bourouiba and yours truly. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3829873 …

      2 replies 79 retweets 423 likes
      Show this thread
    4. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      9/ We need to go back to the origins of theories about the transmission of diseases. Hippocrates (https://en.wikipedia.org/wiki/Hippocrates …) in ancient Greece proposed that diseases were transmitted through the air. [I think doctors still do the Hippocratic Oath: https://en.wikipedia.org/wiki/Hippocratic_Oath …]

      7 replies 50 retweets 410 likes
      Show this thread
    5. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      The Hippocratic text "On the Nature of Man" reads: "Whenever many men are attacked by one disease at the same time, the cause should be assigned to that which is most common, and which we all use most. This it is which we breathe in."https://www.loebclassics.com/view/hippocrates_cos-nature_man/1931/pb_LCL150.25.xml …

      6 replies 102 retweets 591 likes
      Show this thread
    6. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      11/ Throughout much of human history, belief persisted that diseases were transported through the air. Coming from putrid matter, traveling long distances (e.g. a person infected by the flu in Boston could infect someone in UK) This was miasma theory:https://en.wikipedia.org/wiki/Miasma_theory …

      4 replies 38 retweets 333 likes
      Show this thread
    7. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      12/ The idea of person-to-person transmission, which now seems obvious (e.g. we get COVID-19, the flu, or tuberculosis from another person) wasn't seriously considered till Italian physician Girolamo Fracastoro proposed it in 1546:https://en.wikipedia.org/wiki/Girolamo_Fracastoro …

      2 replies 45 retweets 356 likes
      Show this thread
    8. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      13/ The debate ensued for centuries between the miasmatists and the contagionists. https://oyc.yale.edu/history/hist-234/lecture-13 …

      1 reply 29 retweets 278 likes
      Show this thread
    9. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      14/ A middle ground was devised, "Contingent Contagionism"https://en.wikipedia.org/wiki/Contingent_contagionism …

      1 reply 30 retweets 253 likes
      Show this thread
    10. Prof. Jose-Luis Jimenez‏Verified account @jljcolorado 8 May 2021

      15/ CC was "a qualified way of rejecting application of term "contagious disease" for a particular infection. E.g. it could be stated that cholera, or typhus, was not contagious in a "healthy atmosphere", but might be contagious in an "impure atmosphere"https://en.wikipedia.org/wiki/Contingent_contagionism …

      2 replies 34 retweets 273 likes
      Show this thread
      zeynep tufekci‏Verified account @zeynep 8 May 2021
      Replying to @jljcolorado

      Situational germ theory.

      1:41 PM - 8 May 2021
      • 8 Likes
      • Erik Surwill Steve Wilson slowphotographer blaaaa Matt Butler 💉😷No🏳️‍🌈Chill🇵🇷Hockey🍞💐🛫 Steve Greene Karen Herrera
      0 replies 0 retweets 8 likes

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