Alliance for Pandemic Preparedness

April 19, 2021

Increased Transmissibility of SARS-CoV-2 Lineage B.1.1.7 by Age and Viral Load Evidence from Danish Households

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  • [Pre-print, not peer-reviewed] Among Danish households in which an index case was infected with the SARS-CoV-2 B.1.1.7 lineage, the attack rate was 38%, compared to 27% in households with an index case infected with other lineages. A study of 5,241 households with index cases (n = 808 B.1.1.7 and n = 4,433 other lineages) conducted between January 11 and February 7, 2021 found that index cases infected with B.1.1.7 were also 1.5-1.7 times more likely to transmit than cases infected with other lineages; higher transmissibility was multiplicative across age groups and viral load.

Lyngse et al. (Apr 19, 2021). Increased Transmissibility of SARS-CoV-2 Lineage B.1.1.7 by Age and Viral Load Evidence from Danish Households. Pre-print downloaded Apr 19 from https://doi.org/10.1101/2021.04.16.21255459