On the Mayo Clinic Radio podcast, Dr. Priya Sampathkumar, a Mayo Clinic infectious diseases specialist, discusses tuberculosis (TB), a potentially serious infectious disease that mainly affects the lungs. While TB is rare in the U.S., it’s a leading killer worldwide. Also on the podcast, Dr. Rozalina McCoy, a Mayo Clinic endocrinologist and primary care physician, explains why people with kidney disease should be cautious when taking supplements. And Dr. Jan Stepanek, a Mayo Clinic aerospace medicine specialist, explores health and safety concerns with commercial space flight.