The two cases are the first in Cook County in 2025, with O'Hare Airport's Terminal 1 identified as a possible point of public exposure By NBC Chicago Staff • Published April 30, 2025 • Updated ...

The other case involved an adult Chicago resident who traveled internationally through O'Hare International Airport in early April. This person had previously had one dose of the MMR vaccine ...

Cook County reports first 2 measles cases of 2025 One case was detected in a Chicago resident who recently traveled through O’Hare Airport. The other case was reported in a suburban Cook County ...

Two recent measles cases in Cook County, Illinois, one involving an international traveler at O'Hare Airport, have raised concerns in Tippecanoe County.