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Published on: April 9, 2021
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COVID-19 Contact Tracing in Two Counties - North Carolina, June-July 2020
MMWR. Morbidity and Mortality Weekly Report
|September 24, 2020
Summary
Effective COVID-19 contact tracing requires timely notification and community engagement. Many cases did not report contacts, and reaching contacts proved challenging, hindering SARS-CoV-2 transmission control.
Area of Science:
- Public Health
- Epidemiology
- Infectious Disease Control
Background:
- Contact tracing is crucial for minimizing communicable disease spread, including SARS-CoV-2.
- Prompt contact tracing, testing, and self-quarantine are vital for reducing COVID-19 transmission.
- Community engagement is essential for successful SARS-CoV-2 contact tracing participation.
Purpose of the Study:
- To assess the implementation and effectiveness of local COVID-19 contact tracing in North Carolina during a period of high incidence.
- To identify challenges in case investigation and contact notification processes.
Main Methods:
- Analysis of data from two North Carolina counties (Mecklenburg and Randolph) during high COVID-19 incidence.
- Review of case investigation rates and contact reporting.
- Assessment of contact reachability and notification timeliness.
Main Results:
- High percentages of COVID-19 cases were investigated (77% in Mecklenburg, 99% in Randolph).
- Significant proportions of cases reported no contacts (48% in Mecklenburg, 35% in Randolph).
- Substantial difficulty was encountered in reaching reported contacts (25-48% nonresponsive), with a median 6-day delay from specimen collection to contact notification.
Conclusions:
- Despite intensive efforts, current contact tracing methods face challenges in timely notification and contact engagement.
- Improvements in timeliness, community involvement, and broader mitigation strategies are necessary to effectively interrupt SARS-CoV-2 transmission.
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