The book goes on a fascinating journey into the amazing world of viruses, bacteria, protozoa, fungi, and worms and explores the roles they have played in shaping the course of human history. From biblical plagues, to the AIDS crisis, to supergerms of the future, this updated and revised edition of the original covers the whole gamut of diseases that have threatened humanity since its origins. It also includes a new chapter on the history of bioterrorism and the deplorable role it has played and is likely to play in the phenomenal diversity of diseases.