Paul Keown, a specialist in immunology and transplantation, joins Kalina Christoff to discuss the many ways our immune systems contribute to our health -- from allergies and the effects of aging to our response to organ transplants and auto-immune diseases. Paul Keown is a Professor in UBC’s Department of Medicine, a practicing physician at Vancouver General Hospital and has served as Executive Director of the BC Transplantation Program and President of the Canadian Transplantation Society.