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Increased transmissibility of the B.1.1.7 SARS-CoV-2 variant: Evidence from contact tracing data in Oslo, January to February 2021
Jonas Christoffer Lindstrøm; Solveig Engebretsen; Anja Bråthen Kristoffersen; Gunnar Øivind Isaksson Rø; Alfonso Diz-Lois Palomares; Kenth Engø-Monsen; Elisabeth Henie Madslien; Frode Forland; Karin Maria Nygård; Frode Hagen; Ottar Wiklund; Gunnar Gantzel; Arnoldo Frigessi; Birgitte Freiesleben de Blasio.
Preprint in English | medRxiv | ID: ppmedrxiv-21254122

ABSTRACT

We use data from contact tracing in Oslo, Norway, to estimate the new SARS-CoV-2 B.1.1.7 lineages relative transmissibility. Within households, we find an increase in the secondary attack rate by 60% (20% 114%) compared to other variants. In general, we find a significant increase in the estimated reproduction number of 24% (95% CI 0% - 52%), or an absolute increase of 0.19 compared to other variants.

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