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j_g_allen's profile
Joseph Allen
Joseph Allen
Joseph Allen
@j_g_allen

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Joseph Allen

@j_g_allen

Assoc Prof @HarvardChanSPH; Lancet @CommissionCOVID (Chair Task Force on Safe Work/School/Travel); Coauthor of HEALTHY BUILDINGS @Harvard_Press; WaPo, NYT, HBR

Boston
hsph.harvard.edu/joseph-allen/
Joined October 2011

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    1. Joseph Allen‏ @j_g_allen 19 Sep 2020

      10/ five of the 15 "airplane-associated' cases had symptoms beyond the time when 97.5% of people have symptoms (11.5 days) Unlikely these five people caught this on flight.

      3 replies 5 retweets 38 likes
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    2. Joseph Allen‏ @j_g_allen 19 Sep 2020

      11/ So, the '15 cases of airplane-associated cases' is already down to 10 with just some basic review of symptom data. What else can we learn about those other 10...

      1 reply 5 retweets 29 likes
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    3. Joseph Allen‏ @j_g_allen 19 Sep 2020

      12/ The authors took pains to explain away post-flight transmission: "We consider local transmission after arrival in Vietnam unlikely." But when you peek at the appendix, you find more info that suggests post-flight exposure occurred...

      1 reply 4 retweets 25 likes
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    4. Joseph Allen‏ @j_g_allen 19 Sep 2020

      11/ in addition to the symptom data supporting that post-flight exposure happened, so does the time-activity info There sure seems like *a lot* of important post-flight exposure activity Like this: 3 of the 'flight-associated' cases went on *CRUISE SHIPS* after flight (blue)pic.twitter.com/AehOIDHKf3

      2 replies 8 retweets 53 likes
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    5. Joseph Allen‏ @j_g_allen 19 Sep 2020

      12/ Really, look at that figure hard Combine it with the earlier statement that median incubation was 8.8 days after flight, as opposed to 4-5 days from CDC Walk back 4-5 days from when their symptoms appeared. --> cruise ships and hotels is what you see

      2 replies 7 retweets 42 likes
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    6. Joseph Allen‏ @j_g_allen 19 Sep 2020

      13/ For example: Case 2 Symptom onset March 10 activity 5 days before? cruise ship (same with Case 3)

      1 reply 4 retweets 29 likes
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    7. Joseph Allen‏ @j_g_allen 19 Sep 2020

      14/ It is certainly possible some got this on the airplane - the index patient person was actively shedding and coughing + no masks. And strongest evidence here that there might have been transmission on airplane is several cases adjacent to business class.

      1 reply 3 retweets 24 likes
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    8. Joseph Allen‏ @j_g_allen 19 Sep 2020

      15/ if you take out those people who had symptoms well beyond incubation period (meaning, they were unlikely to have gotten this from the flight), does Figure 1 that shows the dense clustering (the strongest argument the authors make), look different?

      1 reply 3 retweets 18 likes
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    9. Joseph Allen‏ @j_g_allen 19 Sep 2020

      15/ eg, Case #4, 10, and 11 are only ones w/ symptoms within 6 days of flight. Does Figure 1 look different if it only shows these 3 cases as 'airplane-associated' cases?

      1 reply 2 retweets 16 likes
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    10. Joseph Allen‏ @j_g_allen 19 Sep 2020

      15/ One way to explore this more is look more closely at the time-activity data and symptom onset in relation to seat location on airplane, but I don't see a way to link the data from the seating chart (fig 1) to time-activity data in appendix)

      1 reply 2 retweets 10 likes
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      Joseph Allen‏ @j_g_allen 19 Sep 2020

      16/ genomic sequencing would answer this...

      4:42 AM - 19 Sep 2020
      • 2 Retweets
      • 26 Likes
      • Ruth Watkins Tintin au Pays des Soviets Aviva Gabriel Tina Forsman Schueler Stanzi le Roux phil Laura Ehrig 🌎💙 Soragni:Lab 内田
      2 replies 2 retweets 26 likes
        1. New conversation
        2. Joseph Allen‏ @j_g_allen 19 Sep 2020

          17/ Taking a step back You can get this virus anywhere. There been millions of travelers since this flight yet one report (similar to SARS). Could be more, sure, but overall rare. And this report is not as airtight as the headline and abstract (and news reports) make it seem

          2 replies 4 retweets 42 likes
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        3. Joseph Allen‏ @j_g_allen 19 Sep 2020

          18/ Big picture: I stand by statement I made in op-ed in May. -time on airplane is lower risk than other parts of travel -masking on airplanes right now is a must -take precautions -only travel if really necessary -STAY HOME WHEN SICKhttps://www.washingtonpost.com/opinions/2020/05/18/airplanes-dont-make-you-sick-really/ …

          8 replies 30 retweets 131 likes
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        4. End of conversation
        1. Amy Cho, MD MBA‏ @amychomd 19 Sep 2020
          Replying to @j_g_allen

          Why are we not using genomic sequencing to identify transmission chains with precision? I really don’t understand this.https://www.bloomberg.com/graphics/2020-opinion-chan-zuckerberg-biohub-covid-tracing/ …

          0 replies 0 retweets 3 likes
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