A year and a half ago, we first reported on a baffling new illness responsible for nightmarish scenarios—a child wakes up and his legs don’t move. Soon, he’s paralyzed from the neck down. Since then, the number of cases has grown and the Centers for Disease Control says it still has no clue what’s causing it and won’t say much else. One thing we know, the disease mimics one of the world’s most feared illnesses, polio. Today, we continue our investigation into the mysterious outbreak that’s left hundreds of American children suddenly frozen.