From left; Gracelyn Reese, 5, Kyran Anderson, 10, Julian Oliva, 10, Liam Doxsee, 9, Samuel Reese, 4, and Harper Reese, 6, play outside at the family’s home in Coal Valley, Ill., on Sunday, Sept. 17, 2023. As Liam’s Instagram profile biography and mother Mary Matheson notes often: “SCID won’t stop this kid.” Liam lives by this mantra.