It was a miserable January morning in Marion, Alabama, last year, with temperatures twenty degrees below average and freezing rain that sliced sideways. But that did not dissuade the people lining up outside the Perry County Health Department. The first appeared at the door when the sun had barely risen, then a couple more arrived, and soon they came by the hundreds. Some brought their children, others showed up with cousins; there were families four generations deep. By nine o’clock, the line had lassoed around the building, with its tail pitching into the parking lot. People held umbrellas in…