Claire's 3 year old son Luke suffers from Duchenne Muscular Dystrophy

Duchenne Muscular Dystrophy is a genetically-linked disease that usually affects boys. It leads to muscle wastage and as the weakness progresses, the boys often become confined to a wheelchair before they turn 10. Claire's 3 year old son Luke suffers from the disease. Stephen spoke to Claire and asked her when he had been diagnosed