(Trent Nelson | The Salt Lake Tribune) The grand ballroom on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Maria Guzman and Kai Pakulski break down a supply room on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) The grand ballroom on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Taylor Starr vaccinates Matt Cox in the grand ballroom at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Maria Guzman and Kai Pakulski break down a supply room on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Dan Ovard working registration on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021. Ovard brought in the two paintings at lower right, to add a calming feel to the grand ballroom.(Trent Nelson | The Salt Lake Tribune) A sign prohibiting photography in the waiting area of the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Wendy Jenkin vaccinates Dalton Baker on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Melanie Wolcott vaccinates Latasha Roddan on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Janet Bitner vaccinates Jeffrey Hesterman on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) Signage on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.(Trent Nelson | The Salt Lake Tribune) PPE on the last day the Salt Lake County Health Department's COVID-19 vaccine operation was open at the Salt Palace Convention Center in Salt Lake City, Saturday, May 29, 2021.