Chicago employers push office return back to October and beyond as delta variant spikes, with some now imposing vaccine mandates

Workers exit an office tower at 151 N. Franklin St., Aug. 6, 2021, in Chicago. Facebook Chicago moved into offices in the building during the pandemic. The social media giant, which has about 500 employees in Chicago, reopened its offices Aug. 2. at 25% capacity and plans to phase employees into the office throughout the fall. (John J. Kim / Chicago Tribune)