Chicago’s top doctor hinted the city could introduce a new proof of COVID-19 vaccination requirement for residents to visit bars, gyms, restaurants and other venues as have other major cities.

Chicago’s mayor wanted police either vaccinated against COVID-19 or regularly tested, but the pushback from their union has received two recent legal advances.

Illinois Gov. J.B. Pritzker couldn’t reach an agreement with the public employee unions representing workers in group settings, so he delayed the COVID-19 vaccination deadline until Nov. 30. Chicago Mayor Lori Lightfoot’s vaccination fight with the police union escalates.