Science at the Edge Germ Killers: Fighting Disease looks at how science and modern medicine save millions of lives each year, and at the constant battle that is waged to stay ahead of new threats to health. It explains how diseases are caused and spread and how vaccination has successfully wiped out some major killers. It explores the importance of health education and aid in combating diseases such as cholera and TB, how drugs are developed and tested, and recent outbreaks of diseases, such as West Nile Fever and Clostridium difficile.