Cook County Comm. Sean Morrison (R-17) [right] on Thursday challenged county board President Toni Preckwinkle over a county public health order requiring proof of vaccination at indoor spaces.

Updated 9:24 a.m. Jan. 14: Cook County Board President Toni Preckwinkle stood firm on Thursday against a mounting backlash — including from one commissioner — against the county’s new vaccination mandate for some businesses, calling the criticism “profoundly disturbing.”