Deer Ridge Correctional Institution - Most recent onset Jan. 4 Two Rivers Correctional Institute - Most recent onset Jan. 1 Salem Hospital - Most recent onset Jan. 1 WinCo Foods Distribution Center - Most recent onset Jan. 1 Ajinomoto Foods North America - Most recent onset Jan. 1 Oregon State Penitentiary - Most recent onset Dec. 31 Powder River Correctional Facility - Most recent onset Dec. 31 Legacy Mt Hood Medical Center - Most recent onset Dec. 31 Rainsweet Inc - Most recent onset Dec. 31 The largest active outbreak remains at the Snake River Correctional Institution in Ontario. The outbreak was first identified on June 24 and the case count has continued to rise since then. There have been 574 coronavirus cases linked to the outbreak, with the most recent case reported on Dec. 29.