Warren County in western Illinois has reported its first human West Nile virus case of 2026, KWQC reported on Oct. 12, as statewide cases keep rising in October. The Illinois Department of Public Health's West Nile surveillance page showed 66 human cases and three deaths as of Oct. 7.
That count is up from 50 cases on Sept. 30, an increase of 16 in about a week. The Warren County Health Department did not release the patient's age or condition.