Washington State Department of Health reports there are now three confirmed cases of Coronavirus inside the state: https://www.doh.wa.gov/Emergencies/Coronavirus [wa.gov] with 1 case in King County and 2 cases in Snohomish County. Seattle is inside King County and Snohomish is just north of King.
ABC reports that the infections are of unknown origin [go.com] and that more potential cases exist in the bordering state of Oregon.
A second case of COVID-19 with an unknown origin was identified in Santa Clara county, California on Friday, and two other potential cases of unknown origin were identified in Oregon and Washington state.
NPR calls Seattle the first confirmed case of Corona virus in the US: [npr.org]
The Centers for Disease Control and Prevention, the CDC, has reported the first case in the United States of a new and deadly coronavirus. A resident of Washington state in the Seattle area is infected. The man had traveled to central China to the city of Wuhan, where the virus was first discovered. It has killed at least 17 people, and scientists now say humans can transmit the virus to one another. And as Will Stone from member station KNKX in Seattle reports, officials in Washington state are trying to prevent the spread of the virus, and also projecting calm.
My own analasys indicates that the symptom profile has changed as well from flu like symptoms to mild flu like symptoms or mild cold like symptoms and more specifically that fever is not mandatory any longer but I am not able to find sources reliable enough to include in a submission. I have a journal entry [soylentnews.org] where I have posted that information. Take it with a grain of salt because I'm a bit stressed and worked up myself.