Epidemiology of SARS-CoV-2 transmission and superspreading in Salt Lake County, Utah, March-May 2020

Understanding the drivers of SARS-CoV-2 transmission can inform the development of interventions. We evaluated transmission identified by contact tracing investigations between March-May 2020 in Salt Lake County, Utah, to quantify the impact of this intervention and identify risk factors for transmi...

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Bibliographic Details
Published in:PloS one 2023-06, Vol.18 (6), p.e0275125-e0275125
Main Authors: Walker, Joseph, Tran, Tiffany, Lappe, Brooke, Gastanaduy, Paul, Paul, Prabasaj, Kracalik, Ian T, Fields, Victoria L, Lopez, Adriana, Schwartz, Amy, Lewis, Nathaniel M, Tate, Jacqueline E, Kirking, Hannah L, Hall, Aron J, Pevzner, Eric, Khong, Ha, Smithee, Maureen, Lowry, Jason, Dunn, Angela, Kiphibane, Tair, Tran, Cuc H
Format: Article
Language:English
Subjects:
Biology and life sciences
Comparative analysis
Confidence intervals
Contact Tracing
COVID-19
COVID-19 - epidemiology
Demographics
Disease transmission
Epidemics
Epidemiology
Evaluation
Generalized linear models
Health aspects
Health risks
Hispanic Americans
Households
Human subjects
Humans
Medical laboratories
Medicine and health sciences
Patients
People and places
Public health
Risk Factors
SARS-CoV-2
Severe acute respiratory syndrome coronavirus 2
Statistics
United States
Utah - epidemiology
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Summary:Understanding the drivers of SARS-CoV-2 transmission can inform the development of interventions. We evaluated transmission identified by contact tracing investigations between March-May 2020 in Salt Lake County, Utah, to quantify the impact of this intervention and identify risk factors for transmission. RT-PCR positive and untested symptomatic contacts were classified as confirmed and probable secondary case-patients, respectively. We compared the number of case-patients and close contacts generated by different groups, and used logistic regression to evaluate factors associated with transmission. Data were collected on 184 index case-patients and up to six generations of contacts. Of 1,499 close contacts, 374 (25%) were classified as secondary case-patients. Decreased transmission odds were observed for contacts aged
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0275125