Martin Kulldorff on Twitter: "To know the effect of #OpenSchools during the pandemic, we need to utilize the data from the one place that kept schools open during the pandemic. Since teachers had no excess risk, schools/children are not major vectors spreading the disease (unlike influenza).… https://t.co/Fhlf7OCMPg"

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Eli Perencevich, MD MS ‏Verified account @eliowa 4 Aug 2020

Really nice discussion of children, schools, and community transmission https://www.vox.com/platform/amp/21352597/covid-19-children-infection-transmission-new-studies …pic.twitter.com/9pTWzd4NzM

5 replies 59 retweets 88 likes

Muge Cevik‏Verified account @mugecevik 4 Aug 2020

Replying to @eliowa

There are many other models that say the opposite though. The problem with the highlighted study is that they could not separate school vs. university closures and other mitigation measures were implemented at the same time so it is difficult to ascertain the actual impact.

5 replies 0 retweets 19 likes

Martin Kulldorff‏ @MartinKulldorff 4 Aug 2020

Replying to @mugecevik @eliowa

Hi Eli, best scientific evidence: Sweden never closed day-care/primary schools, with zero COVID19 deaths and few hospitalized among 1.8 million children ages 1-15. It can spread in schools, but safer than flu, even with #OpenSchools at height of pandemic. https://folkhalsomyndigheten.se/contentassets/c1b78bffbfde4a7899eb0d8ffdb57b09/covid-19-school-aged-children.pdf …

1 reply 6 retweets 17 likes

Eli Perencevich, MD MS ‏Verified account @eliowa 4 Aug 2020

Replying to @MartinKulldorff @mugecevik

I’m not worried about the kids. I’m worried about the teachers and parents and grandparents. South Korea controlled the outbreak with testing and tracing, how’s that working in the US? Comparing US to other countries is not helpful

2 replies 0 retweets 4 likes

Martin Kulldorff‏ @MartinKulldorff 4 Aug 2020

Replying to @eliowa @mugecevik

Important considerations. Again, best evidence from Sweden. With schools open, compared to other professions, the #COVID19 RR was 0.9 (95% CI 0.7-1.1) for day-care and 1.1 (95% CI 0.9-1.3) for primary school teachers. Sample size 260K. 1/2 https://www.folkhalsomyndigheten.se/contentassets/c1b78bffbfde4a7899eb0d8ffdb57b09/covid-19-school-aged-children.pdf …

2 replies 5 retweets 16 likes

Martin Kulldorff‏ @MartinKulldorff 4 Aug 2020

Replying to @MartinKulldorff @eliowa @mugecevik

With open schools in Stockholm, high-risk elderly age >70 that live with a working-age adult had the same #COVID19 risk whether or not they also lived with children age <16. 2/2 https://su.figshare.com/articles/preprint/Residential_Context_and_COVID-19_Mortality_among_the_Elderly_in_Stockholm_A_population-based_observational_study/12612947/1 …

2 replies 13 retweets 36 likes

Eli Perencevich, MD MS ‏Verified account @eliowa 4 Aug 2020

Replying to @MartinKulldorff @mugecevik

What’s your epi interpretation of this data? Kids don’t spread respiratory viruses? Not a hill I’d want to die on. Seems everyone is desperate for your conclusion though.

1 reply 0 retweets 2 likes

Martin Kulldorff‏ @MartinKulldorff 5 Aug 2020

Replying to @eliowa @mugecevik

As an MD you obviously know that children can spread respiratory viruses. So, I do not understand why you are asking the 2nd question. During a pandemic, it is important not to generate misunderstandings/misinformation.

1 reply 0 retweets 7 likes

Eli Perencevich, MD MS ‏Verified account @eliowa 5 Aug 2020

Replying to @MartinKulldorff @mugecevik

Don’t think Sweden’s data is being used correctly. Since baseline risk of death in Sweden was 2x my state’s, I’m not reassured with internal comparisons of teachers, day care workers. It’s misleading. It’s not generalizable and is using the wrong control, so no internal validity

1 reply 0 retweets 2 likes

Martin Kulldorff‏ @MartinKulldorff 5 Aug 2020

Replying to @eliowa @mugecevik

To know the effect of #OpenSchools during the pandemic, we need to utilize the data from the one place that kept schools open during the pandemic. Since teachers had no excess risk, schools/children are not major vectors spreading the disease (unlike influenza).

5:24 AM - 5 Aug 2020

9 Likes

2 replies 0 retweets 9 likes

1. Show replies
1. Hörður K. Nikulásson‏ @Hoddi_K 11 Aug 2020
  Replying to @MartinKulldorff @eliowa @mugecevik
  
  Hörður K. Nikulásson Retweeted Newman Nahas
  
  Sweden is not the only country that didn't close schools.https://mobile.twitter.com/NahasNewman/status/1282048669374701573 …
  
  Hörður K. Nikulásson added,
  
  Newman Nahas @NahasNewman
  
  1/ The most important evidence regarding pediatric transmission comes from Iceland, and their study published in NEJM. Be suspicious of any expert ignoring this paper and discussing anecdotes instead. https://www.nejm.org/doi/pdf/10.1056/NEJMoa2006100?articleTools=true …
  
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