2 patients were treated in Oregon hospitals on Friday for Ebola, with one receiving a dose of the virus.
The state’s Department of Public Health said two people who were in critical condition were being treated for the virus at two different Oregon hospitals.
The department did not give further details about the patients.
The Oregon Health Authority confirmed the two patients on Friday afternoon, citing two people from the same residence.
The state said the other two patients have since been discharged.
Oregon Health Authority officials are trying to track down a third person, but they haven’t identified the patient.
The agency says it is working with the U.S. Centers for Disease Control and Prevention and the U-M Health System.