Chicago unveils vaccine mandate for city employees Aug 26, 2021 | coronavirus, Top Stories, Vaccination Employees with the city of Chicago must be fully vaccinated against COVID-19 by Oct. 15, according to a plan unveiled Wednesday by Mayor Lori Lightfoot.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.