Social innovation in health: concepts and practice. Issue 3 (8th June 2022) - Tucker, Joseph D; Manderson, Lenore; Amazigo, Uche; Alger, Jackeline; Chen, Elizabeth; Labarda, Meredith; Kpokiri, Eneyi; Dako-Gyeke, Phyllis; Peeling, Rosanna W; Cuervo, Luis Gabriel; Halpaap, Beatrice