COVID-19 Case Investigation and Contact Tracing in Central Washington State, June–July 2020

James S. Miller, Robert A. Bonacci, R. Ryan Lash, Patrick K. Moonan, Peter Houck, J. Joyous Van Meter, Malcolm Butler, Teresa Everson, Brittany Morrison, Melissa Sixberry, Amy Person, John E. Oeltmann

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Objective: To evaluate participation in COVID-19 case investigation and contact tracing in central Washington State between June 15 and July 12, 2020. Methods: In this retrospective observational evaluation we combined SARS-CoV-2 RT-PCR and antigen test reports from the Washington Disease Reporting System with community case investigation and contact tracing data for 3 health districts (comprising 5 counties) in central Washington State. All 3 health districts have large Hispanic communities disproportionately affected by COVID-19. Results: Investigators attempted to call all referred individuals with COVID-19 (n = 4,987); 71% were interviewed. Of those asked about close contacts (n = 3,572), 68% reported having no close contacts, with similar proportions across ethnicity, sex, and age group. The 968 individuals with COVID-19 who named specific contacts (27% of those asked) reported a total of 2,293 contacts (mean of 2.4 contacts per individual with COVID-19); 85% of listed contacts participated in an interview. Conclusions: Most individuals with COVID-19 reported having no close contacts. Increasing community engagement and public messaging, as well as understanding and addressing barriers to participation, are crucial for CICT to contribute meaningfully to controlling the SARS-CoV-2 pandemic.

Original languageEnglish (US)
Pages (from-to)918-921
Number of pages4
JournalJournal of Community Health
Issue number5
StatePublished - Oct 2021


  • COVID-19
  • Case investigation
  • Community engagement
  • Contact tracing
  • Participation

ASJC Scopus subject areas

  • Health(social science)
  • Public Health, Environmental and Occupational Health


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