Auto Ads BOILING SPRINGS, S.C. — Near the back corner of the local library’s parking lot, largely out of view from the main road, the South Carolina Department of Public Health opened a pop-up clinic in early November, offering free measles vaccines to adults and children. Spartanburg County, in South Carolina’s Upstate region, has been fighting a measles outbreak since early October, with more than 50 cases identified. Health officials have encouraged people who are unvaccinated to get a shot by visiting its mobile vaccine clinic at any of its several stops throughout the county. But on a Monday…