So they have a very long life, such as people with significant leadership, often with very good doctor came to take care of and critical of sat often invented a pill to cure diseases.
To enable them to live a longer and more important as party leader. They tend to have very good care doctors and scientists have created a major, often invent new drugs to treat the disease.
So they live for a long time, such as a person who leads the usually have excellent doctor to take care of and a scientist, is important. Often invent new drug to cure.