John Henry “Doc” Holliday (1851 – 1887) was an American dentist gambler, shooter, and famous for his friendship with Wyatt Earp. At the age of 20, Holliday earned a degree in dentistry from the Pennsylvania College of Dental Surgery. He started in Atlanta, Georgia but he was soon diagnosed with tuberculosis. He transmitted this diseaes to all his patient. By then, doctors weren’t aware of the fact…