Reply Arlington Heights residents who work in retail, food service, transportation, construction, manufacturing and more can now make appointments to receive vaccines, according to the Cook County Department of Public Health. (Scott Anderson/Patch) ARLINGTON HEIGHTS, IL — Public health officials in suburban Cook County Wednesday expanded COVID-19 vaccine eligibility to all essential workers in Phase 1c, the final vaccine priority group before appointments open up for anyone 16 or older next month. Arlington Heights residents who work in retail, food service, transportation, construction, manufacturing and more can now make appointments to receive vaccines, according to the Cook County Department of Public Health. Those who live in Chicago or other counties but work in the suburbs are also eligible.