A walk-in vaccination clinic in Saratoga County Thursday, April 14, from 1:30 p.m. to 3:30 p.m. at Saratoga County Public Health, 6012 County Farm Road, Ballston Spa. First dose, second dose, third dose, and first and second dose boosters for Moderna, Pfizer, and Johnson & Johnson (J&J) will be available. The vaccines are free. No proof of insurance is required.