The Illinois Department of Public Health and Cook County Department of Public Health announced Saturday an Illinois patient has tested positive for COVID-19.
Health officials said tests conducted in Illinois resulted in presumptive positives for the virus but the results will have to be confirmed by the federal Centers for Disease Control and Prevention lab.
Officials said the patient is hospitalized in isolation while they work to find and monitor those who were in contact with the patient.
They said the state will also request the CDC deploy a team to Illinois.
Illinois has had two previously confirmed cases of COVID-19 and both patients made a full recovery.
Public health officials are encouraging the public to not alter their daily routines and remain vigilant about keeping germs from spreading, by covering coughs and sneezes, washing hands with warm soap and water, and staying home when sick.
Right now, because the virus has not been found to be spreading widely in the U.S., risk to the general public remains low.
Symptoms reported among patients included mild to severe respiratory illness with fever, cough, and difficulty breathing.