While Illinois has had eight cases of the virus so far this year, at least 1,288 cases have been confirmed nationwide, the most in more than 30 years, according to the Centers for Disease Control and Prevention.

IDPH officials said Friday that no new measles cases have been identified in Illinois since May 22. Two incubation periods for the virus, which constitute 42 days each, have passed since the last case was identified, which allows health officials to declare the outbreak over.

No new cases have been diagnosed in the state since May 22nd, and two full incubation periods of 42 days has elapsed since the last confirmed case, allowing the Illinois Department of Health to