Ugale J, Spielvogle H, Spina C, Perreira C, Katz B, Pahud B, Dempsey AF, Robinson J, O’Leary ST, Opel DJ. It’s like 1998 again: why parents still refuse and delay vaccines. Pediatric Academic Societies Meeting, Philadelphia, PA, May 2-5, 2020 (Conference Cancelled). Poster presentation