Lisa was a little girl who was suffering from a rare and serious disease. Her only chance of recovery appeared to be a blood transfusion from her younger five-year-old brother, who has miraculously survived the same disease and had developed the antibodies needed to combat the illness. The doctor explained the situation to her little brother, and asked the boy if he would be willing to give his blood to his sister. The boy hesitated for only a moment before taking a deep breath and saying, “Yes, I’ll do it if it will save Lisa.”
As the transfusion progressed, he lay in a bed next to his sister and smiled. Seeing the color returning to his sister’s cheek, his face grew pale and his smile faded. He looked up at the doctor and asked with a trembling voice, “Will I start to die right away?”
Being young, the boy had misunderstood the doctor. He thought he was going to give his sister all his blood.