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JuliaLMarcus's profile
Julia Marcus, PhD, MPH
Julia Marcus, PhD, MPH
Julia Marcus, PhD, MPH
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@JuliaLMarcus

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Julia Marcus, PhD, MPHVerified account

@JuliaLMarcus

Infectious disease epidemiologist • Associate prof @harvardmed • HIV prevention researcher • Words @TheAtlantic (http://bit.ly/2QPALVv ) • no $COI • she/her

populationmedicine.org/jmarcus
Joined June 2019

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    1. zeynep tufekci‏Verified account @zeynep 8 Aug 2020

      zeynep tufekci Retweeted Prof. Jose-Luis Jimenez

      Thread below with some answers. Also more experts to follow: @linseymarr, @corsiaq, @JimRosenthal4, @stephensbrent. That said, it's past time for CDC to step up and give us guidance on ventilation. As I wrote, Japan has been doing that since the beginning.https://twitter.com/jljcolorado/status/1291760621822726145 …

      zeynep tufekci added,

      Prof. Jose-Luis JimenezVerified account @jljcolorado
      7/ Selecting HEPA cleaner, DO NOT want ones that also have UV, ions or other bells-and-whistles. More $, don’t help, can be dangerous (see below). Filter already capturing the virus, which will decay there. Just change filter carefully, put in sealed bag, wash hands
      Show this thread
      3 replies 24 retweets 101 likes
      Show this thread
    2. zeynep tufekci‏Verified account @zeynep 8 Aug 2020

      zeynep tufekci Retweeted zeynep tufekci

      The dearth of communication from health authorities on even the most basic questions like the one below is maddening. The few experts on social media are doing what they can, but it's really time for the academy to form it's own shadow CDC to communicate.https://twitter.com/zeynep/status/1291777886014365696 …

      zeynep tufekci added,

      zeynep tufekciVerified account @zeynep
      Replying to @brianschatz
      Fourth option: it's more that person's problem than people around them. The virus seems to mostly spread *out* in drops of various sizes through the mouth, but is inhaled *in* and attaches well to the ACE2 receptors in the nose. Mouth-only mask is less protection for the wearer.
      4 replies 38 retweets 143 likes
      Show this thread
    3. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      Same dynamics that led to misrepresentation of mask research early on—ignoring evidence (a-presymptomatic spread), making baseless claims (false sense of security/harm), treating the public like children, lack of clarity on evidence to action etc. are in-play with ventilation.🙄

      3 replies 29 retweets 113 likes
      Show this thread
    4. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      "More research is needed." Yep, as usual. Just like with masks in March, there's a preponderance of evidence to act on ventilation. The answer to shortages was to treat the public as a partner & adults who deserve information; the answer to "don't scare the public" is.. the same.

      3 replies 32 retweets 135 likes
      Show this thread
    5. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      zeynep tufekci Retweeted Brian Resnick

      FWIW, the reason I got into ventilation/short-range aerosol research was what I heard from *epidemiologists* first who decisively argued that that epi data was the strongest reason to suspect this mode of transmission. This isn't a US-only conversation!https://twitter.com/B_resnick/status/1293934375009165312 …

      zeynep tufekci added,

      Brian ResnickVerified account @B_resnick
      Epis ask: "what are the patterns of contagion we're actually observing, and which known model do they fit?" Engineers ask: "what are the physics/mechanics of disease spread, and can we observe it, experimentally?"
      Show this thread
      2 replies 27 retweets 98 likes
      Show this thread
    6. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      That engineers are arguing for aerosol transmission while Epi/ID folks are against works only if one cherry-picks examples plus ignores countries with top-notch experts and solid track record outside the US/EU. Even here, despite disagreements, the consensus/overlap isn't small.

      2 replies 7 retweets 62 likes
      Show this thread
    7. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      This week, the WHO is holding a "wear-a-mask" challenge and our outlets are writing a "how did the WHO/US/CDC/UK/EU/media got it so wrong" articles. How about we do better this time and practice evidence-based causal inference and communication that treats the public like adults?

      1 reply 20 retweets 93 likes
      Show this thread
    8. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      Honestly, the idea that there's some sort of engineers vs. epidemiologists/infectious-disease specialists divide on airborne/aerosol transmission is just not true the moment you step out into the world. Japan, Hong Kong, South Korea, Taiwan.. US is just behind, again, that's all.

      3 replies 38 retweets 162 likes
      Show this thread
    9. zeynep tufekci‏Verified account @zeynep 13 Aug 2020

      zeynep tufekci Retweeted Trisha Greenhalgh

      This is why this "debate" matters. This isn't safe even if people are distanced (WHO says 3 feet and CDC says 6 feet is enough!!) exactly because short-range aerosols and their accumulation indoors, not just droplets that immediately fall, is a concern.https://twitter.com/trishgreenhalgh/status/1293826751844450304?s=20 …

      zeynep tufekci added,

      Trisha GreenhalghVerified account @trishgreenhalgh
      California’s problem: evangelical mega-churches with (they assume) God on their side. >6000 people, maskless, at an indoor service. https://www.cnn.com/2020/08/12/us/pastor-macarthur-church-california/index.html …
      3 replies 36 retweets 129 likes
      Show this thread
    10. zeynep tufekci‏Verified account @zeynep 15 Aug 2020

      Why getting airborne right matters. UNC has clusters. (Surprise? No). They're contact tracing for within six feet without masks. NOT ENOUGH FOR INDOORS. Distance isn't that protective indoors *and* source-control masks aren't magic. We need updated evidence-based guidelines ASAP.pic.twitter.com/ob2zTSVALa

      4 replies 87 retweets 220 likes
      Show this thread
      Julia Marcus, PhD, MPH‏Verified account @JuliaLMarcus 15 Aug 2020
      Replying to @zeynep

      And 15 minutes isn't a magic number! I just talked to some college basketball coaches who were told students could only practice together for 14 minutes at a time.

      4:52 PM - 15 Aug 2020
      • 7 Retweets
      • 46 Likes
      • Kim MA, MScE🚀 💉💉💉😷 Robyn tamsin 🏳️‍⚧️ 🏴 Sumreen Tarar Roni P. 🇯🇲Black🇭🇹 Aziz 🇳🇬aNANsi🇹🇹 EllieSnowRN🔅 dw retired teacher George Hagstrom
      7 replies 7 retweets 46 likes
        1. John Stone  🌵‏ @jstonedotorg 15 Aug 2020
          Replying to @JuliaLMarcus

          pic.twitter.com/26NStbwkpr

          0 replies 0 retweets 6 likes
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        1. Jessica Johnson PharmD‏ @Jessnimm 15 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          Yep. This is the rule our school district is following for who has to quarantine x2 wks. Within six feet of a positive case for >15 minutes. 😟

          0 replies 0 retweets 3 likes
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        1. Angela King - Public Health & Philosophy‏ @mastweiler8 16 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          Aaargh! That is comically ridiculous, and a shining example of focusing on the rules rather than the risk 😬

          0 replies 1 retweet 8 likes
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        1. New conversation
        2. taste the pizza‏ @taste_the_pizza 16 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          with willful stupidity like those coaches, we will never conquer the pandemic. simply an unsalvageable level of idiocy and selfishness.

          1 reply 0 retweets 2 likes
        3. Julia Marcus, PhD, MPH‏Verified account @JuliaLMarcus 16 Aug 2020
          Replying to @taste_the_pizza @zeynep

          Just to clarify, it wasn't the coaches' policy, it was the university's.

          1 reply 0 retweets 3 likes
        4. Show replies
        1. Ray Selby 💻#FBPEGlobal #XR #antifascist #WeDidWarn‏ @tarotray 16 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          This, of course, is total nonsense. It's an arbitrary figure, picked out of the air. One can catch the virus, in an instant.

          0 replies 0 retweets 0 likes
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        2. aeon‏ @AeonCoin 16 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          This may be simple foolishness, but it may also be worse. By limiting interactions to <15 minutes, there are no contacts, no contact tracing, and therefore no ability to identify that basketball is responsible for infections. This is happening all over the place.

          1 reply 0 retweets 1 like
        3. aeon‏ @AeonCoin 16 Aug 2020
          Replying to @AeonCoin @JuliaLMarcus @zeynep

          https://en.wikipedia.org/wiki/Goodhart%27s_law …

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. cme2828‏ @cme2828 17 Aug 2020
          Replying to @JuliaLMarcus @zeynep

          Similarly, an acquaintance’s high school is doing masks-off for the first and last ten minutes of every class period, but on in the middle. They seem to think it’s reasonable and clever.

          0 replies 0 retweets 1 like
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