Mayor Lori Lightfoot speaks outside the United Center mass vaccination site, Tuesday, March, 9, 2021. Lightfoot celebrated the United Center’s new role in the fight against COVID-19. The site will be the biggest COVID-19 vaccination center in he state, with a goal of 6,000 vaccines per day. The site will be open seven days a week for eight weeks. (Antonio Perez/ Chicago Tribune) (Antonio Perez / Chicago Tribune)