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Increased Household Secondary Attacks Rates With Variant of Concern Severe Acute Respiratory Syndrome Coronavirus 2 Index Cases.
Buchan, Sarah A; Tibebu, Semra; Daneman, Nick; Whelan, Michael; Vanniyasingam, Thuva; Murti, Michelle; Brown, Kevin A.
  • Buchan SA; Health Protection, Public Health Ontario, Toronto, Ontario, Canada.
  • Tibebu S; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
  • Daneman N; Health Protection, Public Health Ontario, Toronto, Ontario, Canada.
  • Whelan M; Health Protection, Public Health Ontario, Toronto, Ontario, Canada.
  • Vanniyasingam T; Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
  • Murti M; Division of Infectious Diseases, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
  • Brown KA; Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
Clin Infect Dis ; 74(4): 703-706, 2022 03 01.
Article in English | MEDLINE | ID: covidwho-1708327
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.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Cohort study / Observational study / Prognostic study Topics: Variants Limits: Humans Country/Region as subject: North America Language: English Journal: Clin Infect Dis Journal subject: Communicable Diseases Year: 2022 Document Type: Article Affiliation country: Cid

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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Cohort study / Observational study / Prognostic study Topics: Variants Limits: Humans Country/Region as subject: North America Language: English Journal: Clin Infect Dis Journal subject: Communicable Diseases Year: 2022 Document Type: Article Affiliation country: Cid