O’NEILL, Neb. (AP) — State health officials have confirmed the death of a woman in northern Nebraska from West Nile virus.

Television station KSNB reports that the Nebraska Department of Health and Human Services confirmed the death in May from the state’s North Central Health Department. That department covers Antelope, Boyd, Brown, Cherry, Holt, Keya Paha, Knox, Pierce and Rock counties.

Officials won’t identify the woman to protect her privacy, but say she was between 25 and 50 years old and had and underlying medical condition. Hers was the first case of West Nile in Nebraska this year.

Officials say the woman began experiencing West Nile symptoms very early, outside of the usual West Nile season.