Related video: Downstate Illinois reports 1st measles case of 2025; local physician stresses MMR vaccine

CHICAGO (WGN) Health officials in Cook County have confirmed two additional cases of measles, bringing the state’s total reported cases to three.

The Chicago Department of Public Health and the Cook County Department of Public Health announced on Wednesday that one case involves a suburban resident, whose vaccination status is unknown. The second case involves a Chicago resident who, according to health officials, traveled internationally through O’Hare International Airport in early April. 

“The individual had one prior dose of MMR vaccine,” health officials added.

Both patients have been isolated since being diagnosed.

In response to the confirmed cases, health officials listed the following points of potential exposure:

• Monday, April 21: Chicago Public Library – Independence Branch, 4024 N. Elston Ave. 
• Monday, April 21: Fittingly Delicious, 3939 W. Irving Park Rd. 
• Tuesday, April 22: O’Hare Airport, 10 a.m.–8 pm, especially Terminal 1 
• Wednesday, April 23: O’Hare Airport, 10 a.m.– 8 pm, especially Terminal 1 
• Friday, April 25: Aldi: 7235 39th St, Lyons, IL 6053, 10 a.m.- 12:30 p.m. 
• Sunday, April 27: Shell: 3901 S. Harlem Ave., Stickney, IL 60402, 10 a.m.- 12:30 p.m. 
• Monday, April 18: Mobil: 2945 S. Harlem Ave, Berwyn, IL 60402, 10:20 a.m.-1 p.m. 

The news comes one week after Illinois health officials reported the state’s first case, which stemmed from a diagnosis downstate in Marion.

According to health officials, symptoms of measles include rash, high fever, cough, runny nose, and red, watery eyes. Symptoms can appear anywhere from seven to 21 days after exposure.

Last year, the Illinois Department of Public Health reported 67 cases.