No appointments required for pop-up, mobile sites in Jacksonville Saturday Updated: Tags: JACKSONVILLE, Fla. – Saturday morning, pop-up vaccination sites on Jacksonville’s Northside and Westside will administer Johnson & Johnson single-dose vaccines and no appointments are required. They are expected to be busy today, especially ahead of Monday when the requirements are going to allow everyone 16 and older to get the shot. Highlands Library at 1826 Dunn Ave. - 10 a.m.-7 p.m. Mary Lena Gibbs Park, 6974 Wilson Blvd. - 10 a.m.-7 p.m. The Agape Family Health mobile vaccination buses will be at three locations on Saturday: Sanctuary at Mount Calvary at 9 a.m.