Louis Pasteur will never forget the day when he saw his friend Henry bitten by a mad dog. At that time he was nine. Some days later, Henry did get rabies(狂犬病) and died with great pain. Pasteur thought, "I would like to do something to help people like Henry. Sixteen years later Pasteur became a Doctor of Science. He began making important discoveries in his special field and had may successes in his life. However, he had never forgotten his friend Henry who died of rabies(狂犬病).After many dangerous experiments on mad dogs, he finally found the answer. Just then a boy who had been badly bitten by a mad dog arrived at his lab. A few days after Pateur's treatment the boy got better. He didn't catch rabies. 请判断正误: Henry died of rabies without any pain.