ABUJA, Nigeria ― After her father died two years ago during a Boko Haram raid on her village in Yobe, Nigeria, 16-year-old Zulyatu, her younger siblings and their mother fled to Biu, a town in northeast Nigeria’s Borno state. A year ago their mother left for another town to get treatment for high blood pressure from a traditional healer, leaving Zulyatu alone to care for her siblings, 12-year-old Abubakar and 8-year-old Amira.