(Salmon Creek, WA)  --  Nearly 300 patients who visited the Chiro One Wellness Center in Salmon Creek may have been exposed to COVID-19.  Health officials say an employee at the clinic has tested positive for COVID-19.  Patients who were at the clinic between September 8th and 11th may have been exposed.  Clark County is contacting all of those people to tell them they need to quarantine for two weeks.