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This page is no longer being updated as of 9/8/21. COVID-19 Case Investigation and Contact Tracing for King County is now being conducted by Washington Department of Health. Up to date information on case investigations and contact tracing can be found on WA DOH's website. For additional resources related to COVID-19 available in King County, please see COVID-19 information and resources and the COVID-19 Care and Support page.

Case investigation and contact tracing are essential strategies for limiting the spread of COVID-19, along with face coverings, social distancing, handwashing and testing.

Public Health's Case Investigation and Contact Tracing Team calls King County residents who have recently tested positive for COVID-19 ("cases"). And they call people who were exposed to COVID-19 ("contacts"). The phone calls include an explanation of isolation and quarantine guidelines, how to get testing and support services, and collecting information that helps Public Health's infection control programs.

To learn more about how this strategy works, please see our Public Health Insider blog King County's COVID-19 contact tracing efforts gain strength and background page.


Return to the COVID-19 data dashboards homepage

View the dashboard on a web-enabled mobile device (phones and tablets)

Select the down-arrow icon at the bottom-right of the dashboard for other formats