Besides Illinois, all U.S. states and territories . are now subject to the advisory, under which unvaccinated travelers returning from those areas to Chicago must quarantine for a week, according to a Wednesday press release from the Chicago Department of Public Health. States get on the list by surpassing 15 daily COVID-19 cases per 100,000 residents, but Illinois is not subject to the advisory because the city does not want to restrict intrastate travel.
