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Frederik Plesner Lyngse Profile picture
Frederik Plesner Lyngse
@LyngseF
Assistant Professor of Health Economics @ Department of Public Health, University of Copenhagen
Sep 26, 2022 • 34 tweets • 11 min read
Very happy that this work is finally out in a peer reviewed journal: @NatureComms
“Household transmission of the SARS-CoV-2 Omicron variant in Denmark”
Read it here: nature.com/articles/s4146…

A short thread with the new/updated results.
1/ We investigate the secondary attack rate (SAR) in households infected with #SARSCoV2 #Omicron vs #Delta in Demark, 9-22 December 2021.
2/
Jan 31, 2022 • 15 tweets • 9 min read
New Preprint Out!
“Transmission of SARS-CoV-2 Omicron VOC subvariants BA.1 and BA.2: Evidence from Danish Households”
We investigate the secondary attack rate (SAR) in #Omicron BA.1 vs. BA.2 households in Demark, 20 December 2021 – 18 January 2022.
medrxiv.org/content/10.110…
1/ ImageImage We conclude that Omicron BA.2 is inherently substantially more transmissible than BA.1. It also possesses immune-evasive properties that reduce the protective effect of vac. against infection, but do not increase its transmissibility from vac. persons with breakthrough infect.
2/
Jan 10, 2022 • 10 tweets • 4 min read
New Preprint Out!
Effect of Vaccination on Household Transmission of SARS-CoV-2 Delta VOC
We investigate the secondary attack rate (SAR) in #Delta households in Demark, June-November December 2021.
medrxiv.org/cgi/content/sh…
1/N We have 24,693 primary cases (33% fully vaccinated) and 53,584 potential secondary cases (49% fully vaccinated).
The SAR was generally lower among vaccinated potential secondary cases than among unvaccinated.
2/N
Dec 29, 2021 • 24 tweets • 8 min read
New Preprint Out!
SARS-CoV-2 Omicron VOC Transmission in Danish Households
We investigate the secondary attack rate (SAR) in #Omicron vs #Delta households in Demark, 9th-19th December 2021.
medrxiv.org/content/10.110…
1/N Image Overall, our findings confirm that the rapid spread of Omicron can primarily be ascribed to the immune evasiveness rather than an inherent increase in the basic transmissibility.
2/N