Olga Serda of Pontiac sat down with a registered nurse at the Lake Orion Farmer Jack store on Dec. 10 to get her flu shot. The store offered a flu shot clinic from 4-7 p.m., and by 4:15 p.m. the line already stretched around the store and almost out the door. Oakland County residents have been scrambling to find flu shots in recent weeks as national supplies are running low.