Immune systems are wild, and it’s also wild how they can go spectacularly wrong in different ways. Autoimmune diseases run in families, but not necessarily the same disease. My great-aunt has Crohn’s. My dad and big brother both have segmental vitiligo (dad, just on the back of his neck and a shoulder, my brother on one arm), but my immune system decided my thyroid was the enemy. Like. Not fair, body. 🤣