Increased Household Secondary Attacks Rates With Variant of Concern Severe Acute Respiratory Syndrome Coronavirus 2 Index Cases. (9th June 2021)

• Record Type: Journal Article
• Authors: Buchan, Sarah A; Tibebu, Semra; Daneman, Nick; Whelan, Michael; Vanniyasingam, Thuva; Murti, Michelle; Brown, Kevin A
• Is Part Of: Clinical infectious diseases. Volume 74:Number 4(2022)
• Page Start: 703
• Page End: 706
• Publication Date: 2021-06-09
• Subjects: COVID-19 -- SARS-CoV-2 -- variants of concern -- household -- transmission; Communicable diseases -- Periodicals; 616.905
• DOI: 10.1093/cid/ciab496
• Languages: English
• ISSNs: 1058-4838

Abstract

Abstract: 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.