Firefighters on Saturday learned that two occupants in an apartment fire had texted positive for the virus.
With new deaths reported and the number of confirmed U.S. cases exceeding 1,000, lawmakers and health officials set up containment zones and quarantine areas and sought to limit contact with those who might be infected.
King County officials buy motel for COVID-19 patients.
Twenty-five firefighters from Fire Station 21 in Kirkland who helped ill patients at Life Care Center are now under quarantine as well as a precaution.
The U.S. on Tuesday reported its first case of a new and potentially deadly virus circulating in China, saying a Washington state resident who returned last week from the outbreak's epicenter was hospitalized in good condition near Seattle.