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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. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted Andrew L. Croxford

      “Immune escape” is a broad church. It spans the infection event, right up to severe outcomes. It’s hard to integrate into models. But if you are exposed to an infected person, the reduced nAbs in 1 dose AZ for B.1.617.2/δ may be critical.https://twitter.com/andrew_croxford/status/1398337948416946178?s=20 …

      Andrew L. Croxford added,

      Andrew L. Croxford @andrew_croxford
      Sadly for us, it’s not easy to compare between the two, because it’s either two doses of Pfizer, or a single dose of AZ. However, I think that this data supports recent data from PHE showing a pretty big loss of VE after a single dose of the AZ vaccine in this variant. pic.twitter.com/wgMbhGeYx4
      Show this thread
      1 reply 2 retweets 34 likes
      Show this thread
    2. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      The first line of defence provided by vaccination is nAb. If you have less capacity to neutralise after exposure to a variant, you will more likely be infected, thus increasing the time frame in which you can test positive as viral load accumulates in your body.

      1 reply 2 retweets 39 likes
      Show this thread
    3. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted Bolton Council

      Will this affect the B.1.617.2/δ case numbers during surge testing? I expect so. Little Boris comes home from a school outbreak with B117/α in his bag to his AZ-jabbed parents > less chance of infection. With B.1.617.2/δ, a different story, perhaps.https://twitter.com/boltoncouncil/status/1396473555861266435?s=20 …

      Andrew L. Croxford added,

      Bolton CouncilVerified account @boltoncouncil
      Another busy day for our teams dropping off PCR tests in Halliwell and Central Bolton. There'll be in the area until 6pm this evening. If you live in the area, and don't have symptoms, get tested! Find out more about testing here 👇 https://bit.ly/3fcNHhw  pic.twitter.com/OLrmABoRFl
      1 reply 2 retweets 37 likes
      Show this thread
    4. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted Isaac Florence

      PHE have a mammoth task putting a number on it, and it’s often depressingly thankless. Here’s a great thread, explaining how methodology can change discovery rates of cases. A lesson in confounding factors.https://twitter.com/IsaacATFlorence/status/1400739270550298625?s=20 …

      Andrew L. Croxford added,

      Isaac Florence @IsaacATFlorence
      ... is that vaccines protection older age groups and surge PCR-testing in schools creating vastly higher case-ascertainment in those age groups is more likely the reasoning behind why Delta case rates are relatively higher in schools. /12
      Show this thread
      2 replies 3 retweets 52 likes
      Show this thread
    5. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted Dr Ed

      Why am I bent on this number? @notdred makes the point. *We* can buy our way out. But the global consequences of a variant that is inherently 70% more transmissible & 2x more virulent than B117/α is frightening, and I can’t do another 5-10 years of COVID.https://twitter.com/notdred/status/1400863583374876675?s=20 …

      Andrew L. Croxford added,

      Dr Ed @notdred
      I worry about data on B.1.617.2 (“delta” variant), something I didn’t say about any other variant. Not worried for where I live, 90%+ adults are vaccinated with mRNA. But in low-vax areas many may get sick & prior infection is not guaranteed protection. Keep vaccinating.
      Show this thread
      3 replies 6 retweets 62 likes
      Show this thread
    6. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      On a personal note: my career to date is investigating complex biological data sets, identify strengths & weaknesses and planning how to build on it. That’s the “biology career” mindset. I’m not peddling happiness for clicks. I can’t work out why I’ve been labelled an ‘optimist’.

      2 replies 2 retweets 80 likes
      Show this thread
    7. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Contrary to claims, I’m not leaving ‘because of bad news’. The *massive* fever-pitch-esque overreaction and to the technical report & ignoring the key question (vax status) is what clinched it, immediately seized upon by the COVID high sparrows to trash the Gov/PHE response to δ.

      3 replies 3 retweets 88 likes
      Show this thread
    8. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      The fact is, when I look at data, it’s likely that I see something very different to you. I may have different concerns and questions. I see something different to some virologists, immunologists, epi peeps. DEFINITELY different to the math dudes (love you guys). And that’s fine.

      3 replies 3 retweets 80 likes
      Show this thread
    9. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted

      A claim that a variant is 2x more virulent, or 70% more transmissible, or 4-fold less neutralised in vitro is complex. Clinical data is a tricky business. I have always said the modellers are up against it. There’s only so much you can normalise. https://twitter.com/andrew_croxford/status/1396935250220134406?s=20 …

      Andrew L. Croxford added,

      This Tweet is unavailable.
      4 replies 8 retweets 74 likes
      Show this thread
    10. Andrew L. Croxford‏ @andrew_croxford 4 Jun 2021

      Andrew L. Croxford Retweeted Andrew L. Croxford

      Few people grasp the details of vaccine biology & can't interpret neutralisation/immunogenicity data. Simply put, in vitro is painting a gloomier picture then real world VE data. PRNTs are confusing and shouldn’t be wielded to make people feel unsafe.https://twitter.com/andrew_croxford/status/1398705136634142722?s=20 …

      Andrew L. Croxford added,

      Andrew L. Croxford @andrew_croxford
      I’m despairing at how vaccine convalescent serum neutralization data is confusing people & creating post-vaccination disappointment in those who received the AZ vaccine, to the point of questioning having the second dose. Some seem to feel like they’ve been screwed. They haven’t.
      Show this thread
      3 replies 12 retweets 103 likes
      Show this thread
      zeynep tufekci‏Verified account @zeynep 4 Jun 2021
      Replying to @andrew_croxford

      I hate this variant more than any other. But seems like the least worse scenario is if reduced nAb to one dose AZ has a bigger share in producing detectable cases, no? I'm not sure people understand the alternative explanation is kinda terrifying.

      1:23 PM - 4 Jun 2021
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      • Neil Hamilton Jasnah Kholin - 8964 - ACAB - 💉💉 nearlytoolate Frederik Lermyte Russell Dann 💙 Andrew L. Croxford rainingcatsanddogs Michael Edwards.
      4 replies 1 retweet 14 likes
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        1. Rodric Jenkin‏ @ValleyWye 4 Jun 2021
          Replying to @zeynep @andrew_croxford

          I definitely dont understand. Do i want to? Sounds like maybe not.

          0 replies 0 retweets 2 likes
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        2. Michael Lin, MD PhD  🧬‏ @michaelzlin 4 Jun 2021
          Replying to @zeynep @andrew_croxford

          Yes, the anti-S vax that produced lower nAb levels and had lower efficacies (they're related) will see the most breakthrough cases. But in the UK, AZ real-world efficacy is >85% due to the wider spacing between doses, and protection from severe disease is likely to be high.

          1 reply 0 retweets 1 like
        3. zeynep tufekci‏Verified account @zeynep 4 Jun 2021
          Replying to @michaelzlin @andrew_croxford

          The thing is, alternatively, you're looking at an R in the 7+ range, with likely more severity (unclear yet how much but seems pretty likely), and I'm not sure the "sitting duck" countries can hold that back with NPIs at this point, with the current vaccine production timelines.

          1 reply 0 retweets 4 likes
        4. Show replies
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        2. nearlytoolate‏ @nearlytoolate 4 Jun 2021
          Replying to @andrew_croxford @zeynep

          Fully accept I don’t completely understand the science here. So it’s good to have people like you explaining it. And tbh it’s not always desirable to face the most terrifying scenarios, especially when you can’t change anything.

          0 replies 0 retweets 0 likes
        3. End of conversation
        1. New conversation
        2. Na Sirf Musiqi  🧡‏ @nasirfmusiqi 4 Jun 2021
          Replying to @zeynep @andrew_croxford

          Hard to see anything other than some of both.....it's suddenly gone astronomical in unvaccinated groups when b117 was steady away. But also, relelentless but slower rises amongst single dosed groups....pic.twitter.com/ded9Ok1s9l

          1 reply 0 retweets 1 like
        3. zeynep tufekci‏Verified account @zeynep 4 Jun 2021
          Replying to @nasirfmusiqi @andrew_croxford

          Yeah some of both, the question is in what proportion. We'll know more soon.

          2 replies 0 retweets 3 likes
        4. Show replies
        1. Frank‏ @realMrFrank 4 Jun 2021
          Replying to @zeynep @andrew_croxford

          Save some hate for the next variant?

          0 replies 0 retweets 0 likes
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