Premieres Wednesday, Nov. 15, 2023 at 9 p.m. on KPBS TV / PBS App + Encores Sunday, Nov. 19 at 2 p.m. on KPBS TV and 9 p.m. on KPBS 2. Are scientists on the verge of a breakthrough in the fight against malaria, one of humanity's oldest and most devastating plagues? Follow researchers as they develop and test a promising new vaccine on a quest to save millions of lives.