Book excerpt: The 20th century has seen improvements in both public health and disease prevention which, in turn, have had a dramatic impact on our lives. Success in preventing infection by vaccination and treating infection with antibiotics led some to believe that infectious disease was a thing of the past. However, the adaptability of pathogens and the emergence of new diseases has presented microbiologists with a fresh set of challenges as we enter the new millennium. While celebrating past successes and highlighting developing problems, this volume aims to address some of the issues facing microbiologists in the future. Covering a wide range of topics, it will provide an invaluable resource for microbiologists and an excellent reference for advanced students.