High Community Transmission of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Associated With Decreased Contact Tracing Effectiveness for Identifying Persons at Elevated Risk of Infection-Vermont

Brian F Borah; Julia Pringle; Michael Flaherty; John E Oeltmann; Patrick K Moonan; Patsy Kelso

doi:10.1093/cid/ciac518

High Community Transmission of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Associated With Decreased Contact Tracing Effectiveness for Identifying Persons at Elevated Risk of Infection-Vermont

Clin Infect Dis. 2022 Oct 3;75(Suppl 2):S334-S337. doi: 10.1093/cid/ciac518.

Authors

Brian F Borah^{1

2}, Julia Pringle^{2

3}, Michael Flaherty², John E Oeltmann⁴, Patrick K Moonan⁴, Patsy Kelso²

Affiliations

¹ Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
² Vermont Department of Health, Division of Health Surveillance, Burlington, VT, USA.
³ Center for Preparedness and Response, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
⁴ COVID-19 Response Team, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.

Abstract

Vermont contact tracing consistently identified people at risk for coronavirus disease 2019 (COVID-19). However, the prevalence ratio (PR) of COVID-19 among contacts compared with noncontacts when viral transmission was high (PR, 13.5 [95% confidence interval {CI}, 13.2-13.9]) was significantly less than when transmission was low (PR, 49.3 [95% CI, 43.2-56.3]).

Keywords: COVID-19; SARS-CoV-2; Vermont; contact tracing; effectiveness.

Published by Oxford University Press on behalf of Infectious Diseases Society of America 2022.

MeSH terms

COVID-19*
Contact Tracing
Humans
SARS-CoV-2*
Vermont