AP The Oakley-Lindsay Center in Quincy — a five-hour drive from Chicago — became an unlikely go-to spot during the pandemic. The regional convention center along the Mississippi River has distributed 25,000 vaccine doses per month, including thousands to Chicagoans who had trouble booking shots here. But the costs to run the mass vaccine site, even with new, reduced hours and lower demand lately, still run into the thousands each day, said Jerrod Welch, the public health administrator of the Adams County Health Department. It’s $50,000 a month to lease the convention center. Staff are paid $20 per hour. At its peak, the total operating cost to run the mass vaccine site every month is $175,000.