Dennis Bannister’s daughter, Demi, was the first to die.She was only 28, a beloved third-grade teacher who likely caught the virus during a training at her Columbia, S.C., school district. Doctors diagnosed her with a bladder infection, and by the time they realized their mistake, it was too late. Not long after, the family’s matriarch, Shirley, 57, complained of difficulty breathing. She was twice sent home from the emergency room before returning by ambulance and being put on a ventilator. She died soon after.Which left Dennis Bannister, childless and a widower, sitting on his porch last...…Dennis Bannister’s daughter, Demi, was the first to die.She was only 28, a beloved third-grade teacher who likely caught the virus during a training at her Columbia, S.C., school district. Doctors diagnosed her with a bladder infection, and by the time they realized their mistake, it was too late. Not long after, the family’s matriarch, Shirley, 57, complained of difficulty breathing. She was twice sent home from the emergency room before returning by ambulance and being put on a ventilator. She died soon after.Which left Dennis Bannister, childless and a widower, sitting on his porch last...WW…