>> reporter: this picture of camdyn carr was taken on august 30. as parents thought he had a routine sinus infection, but within 72 hours, this healthy four-year-old was paralyzed. and two days later... te my son died on that tuesday. >> reporter: died. eporeah. ha reporter: what do you mean? >> he coded on tuesday. >> reporter: chris carr is camdyn's father. and when were you when all this was happening? >> about as far as me and you are, from him. i lost it. i lost it. >> reporter: and you almost lost him. >> yeah, right, definitely. at reporter: fortunately, doctors revived camdyn. now he is at the kennedy krieger y stitute in baltimore for uttensive therapy. are you going to be a conductor when you grow up? uute flaccid myelitis, or a.f.m., has ravaged his body. ge has a tube to help him breathe, and only slight thvement in one hand and one foot. >> i do have hope for these kids! >> reporter: rebecca martin manages the rehabilitation center. >> they make slow, incremental progress, and they really can