Increased Household Secondary Attacks Rates With Variant of Concern Severe Acute Respiratory Syndrome Coronavirus 2 Index Cases.

Sarah A Buchan, Semra Tibebu,Nick Daneman,Michael Whelan,Thuva Vanniyasingam,Michelle Murti,Kevin A Brown

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America（2022）

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摘要

We compared secondary attack rates in households with B.1.1.7 variant of concern (VOC) versus non-VOC index cases in a matched cohort in Ontario, Canada. The secondary attack rate for VOC index cases was 1.31 times higher than non-VOC index cases. This increase was particularly accentuated for asymptomatic or presymptomatic index cases.

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