...A passive needle guard and a medicine cartridge (90) as a medicine syringe, preferably a pre-filled syringe, a) the passive needle guard comprising: an elongate body (20, 120, 420, 520) having open proximal (22, 122, 422, 522) and distal ends (24, 124, 424, 524) and a cavity (26, 126, 426, 526) for receiving the medicine syringe therein accessible through the open proximal end; the body having a locking...