The deadliest diseases then and now

Then: The fourteenth century

Part One: The great mortality ; Calling all disease detectives ; Old story, new evidence ; Meet Y. prestis: Hosts, vectors, people ; The great mortality strikes Italy ; Death by disease and hate ; Across the narrow sea

Part Two: PLague, plague, and more plague ; Waves of plague in a world transformed ; The plague fighter ; Will plague strike again?

Part Three: Global disaster: The 1918 influenza pandemic ; The deadliest flu outbreak in history

Part Four: Other deadly diseases then and now ; Diseases are here to stay

Part Five: NOW: The twenty-first century ; Covid-19.