(Springfield, IL) -- State officials are implementing a mandatory quarantine for anyone who comes into Illinois after having contact with an Ebola patient. Officials say they'll keep watch on the person for 21-days. The new requirement comes days after a doctor in New York City fell ill with the disease. He'd just returned to the U.S. after treating Ebola patients in West Africa. The doctor rode the subway, took a cab, and went bowling before he got sick. No Ebola cases have been reported in Illinois.