New analysis of data from the Illinois Board of Education found less than half of Chicago Public Schools had herd immunity ...

Two measles cases have been confirmed in Cook County amid the latest 2025 outbreak, public health officials announced ...

New analysis found that less than half of Chicago Public Schools have herd immunity against the measles as of 2025. More than ...

As measles cases are on the rise in the United States, Chicago has reported the city's first case of the year.

The Illinois Department of Public Health (IDPH) is sounding the alarm on a potential measles exposure at Chicago O’Hare ...

The Cook County cases follow the first case of measles this year in Illinois in an unvaccinated adult in Marion, reported ...

A Sun-Times analysis of state data found the rate of vaccinations has dropped sharply from the rate in 2019, when 90% of schools were at herd immunity.

One case was detected in a Chicago resident who recently traveled through O'Hare Airport. The other case was reported in a ...

Chicago doctors are frustrated as measles cases spread into Cook County, saying "This is an effective vaccine." ...

North America’s three biggest measles outbreaks continue to balloon, with more than 2,500 known cases; three people have died ...

The Chicago Department of Public Health and Cook County Department of Public Health have identified the first two cases of ...

As of May 1, no cases of measles have been reported in Wisconsin this year. But some state health officials consider it only a matter of time.