CHICAGO (WLS) -- Chicago health officials updated the city's COVID vaccine distribution plan Wednesday, with March 29 set as the date the city will begin vaccinating residents in the Phase 1C group. In 1C, more essential workers are eligible, including those in hospitality, construction, law, banking and media, as are Chicagoans 16 to 64 with serious health conditions. It's been twelve weeks since the first vaccine shot was administered in the City of Chicago. Currently, one in four adults have received at least their first dose. With supplies on the increase, Mayor Lightfoot made it official: soon a lot more people will be eligible to roll up their sleeves.