학술논문
Epidemiologic Findings from Case Investigations and Contact Tracing for First 200 Cases of Coronavirus Disease, Santa Clara County, California, USA.
Document Type
Journal Article
Author
Ortiz, Nancy; Villarino, Elsa; Lee, James T.; Bajema, Kristina L.; Ricaldi, Jessica N.; Smith, Shanon; Wen Lin; Cortese, Margaret; Barskey, Albert E.; Da Silva, Juliana F.; Bonin, Brandon J.; Rudman, Sarah L.; Han, George S.; Fischer, Marc; Chai, Shua J.; Cody, Sara H.; Lin, Wen; Rudman, Sarah; Santa Clara County COVID-19 Case Investigation Team1 (CORPORATE AUTHOR); Santa Clara County COVID-19 Case Investigation Team (CORPORATE AUTHOR)
Source
Subject
*COVID-19
*CONTACT tracing
*INFECTIOUS disease transmission
*TELECOMMUTING
*HOUSEHOLDS
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*
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Language
ISSN
1080-6040
Abstract
In January 2020, Santa Clara County, California, USA, began identifying laboratory-confirmed coronavirus disease among residents. County staff conducted case and contact investigations focused on households and collected detailed case demographic, occupation, exposure, and outcome information. We describe the first 200 test-positive cases during January 31-March 20, 2020, to inform future case and contact investigations. Probable infection sources included community transmission (104 cases), known close contact with a confirmed case-patient (66 cases), and travel (30 cases). Disease patterns across race and ethnicity, occupational, and household factors suggested multiple infection risk factors. Disproportionately high percentages of case-patients from racial and ethnic subgroups worked outside the home (Hispanic [86%] and Filipino [100%]); household transmission was more common among persons from Vietnam (53%). Even with the few initial cases, detailed case and contact investigations of household contacts capturing occupational and disaggregated race and ethnicity data helped identify at-risk groups and focused solutions for disease control. [ABSTRACT FROM AUTHOR]