A new vaccination site will open Thursday in Adams County, and it will be the largest in the county.The site is located at the Adams County Department of Emergency Services building at 230 Greenamyer Lane in Gettysburg. It's a partnership between WellSpan Health and Adams County. The center will initially be open three days a week: Thursday, Saturday and Sunday. Appointments can be scheduled through MyWellSpan and the COVID-19 hotline. GETTYSBURG, Pa. — A new vaccination site will open Thursday in Adams County, and it will be the largest in the county. Advertisement The site is located at the Adams County Department of Emergency Services building at 230 Greenamyer Lane in Gettysburg.