Michael Strahan and his daughters Isabella and Sophia open up in this week's PEOPLE cover story about Isabella's strength and resilience in battling a brain tumor at age 19. After going through multiple rounds of radiation, grueling chemotherapy and several surgeries, Isabella, now 20, is cancer-free. The Strahan family shares the story of her battle in this week’s PEOPLE, ahead of an upcoming ABC special: Life Interrupted: Isabella Strahan's Fight to Beat Cancer, airing Feb. 5 at 10 p.m. and the next day, Feb. 6 on Disney+ and Hulu.