Rachel Scott, right, helps suction the mouth of her son, Braden, in Tomball, Texas on Friday, March 29, 2019. He was 7 on July 4, 2016, when he uncharacteristically decided he didn’t want to go swimming. He had trouble swallowing and felt tired and weak. His parents took him to an urgent care center, then to a hospital. Within days he could only move one hand.