Invisible enemies. Part 1, The origins of disease. Part 2, New genes for old.

Written and presented by Dr. Norman Swan, the series ranges worldwide in order to map the history and geography of epidemics past and present, using a rich variety of visual material. "Part One: The Origins of Disease"How the mystery of Korean haemorrhagic fever was solved, and the lessons to be drawn from it; shell-shock/post-traumatic stress disorder; a controversial view of repetitive strain injury; and the avoidable causes of heart disease and diabetes.