Hey guys. I currently am a high school senior going into a Biology-Pre Med program next year at Bradley University. From what I have heard, Johns Hopkins is one of the top programs for those specializing in Infectious Diseases. Are there any other good med schools for this specialty? (Guess it technically is a subspecialty of Internal Med, but still). Also, to specialize in more than one area, are you required to take another four years of medical school or just another 1-2 years since the first two are just general medicine? Any information would be greatly appreciated .