OMAHA, Neb. (AP) — The Nebraska doctors treating an American health care worker who was exposed to the deadly Ebola virus in Sierra Leone won’t discuss the case because of privacy concerns.

Nebraska Medical Center spokesman Taylor Wilson said Monday that the patient wants the details of his or her care to remain private.

If the patient does test positive for Ebola, public health officials would report that. But the patient was not ill or contagious when he or she arrived at the Omaha hospital on Sunday.

The patient will be observed throughout the virus’ 21-day incubation period. Doctors and nurses are taking precautions as if the patient had Ebola

The Nebraska Medical Center treated three people with Ebola last fall. Two of those patients recovered, and one patient died.