Eliza O’Neill of Columbia, South Carolina, was diagnosed with Sanfilippo syndrome when she was 3 years old, PEOPLE reported. The genetic disorder prevents the body from properly breaking down sugar and causes brain damage, blindness, nerve damage and death. “It was her only shot,” Glenn told PEOPLE. “The kids who are untreated have feeding tubes because they can’t eat, they get wheelchairs because they can’t walk, they have terrible seizures and they pass away,” Glenn told PEOPLE. For 726 days, the O’Neills rarely left the house to avoid exposing Eliza to agents that could accelerate her symptoms.

Source: Fox News August 16, 2016 13:07 UTC