Chicago updates COVID-19 mandate to allow unvaccinated workers to undergo testing Oct 11, 2021 | coronavirus, Top Stories, Vaccination Chicago will allow its unvaccinated workers to undergo regular COVID-19 testing through the end of the year, officials announced Friday.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.