These in-depth and informative books examine the nature of these diseases and the devastating effects they have had on populations throughout the world and throughout history. From the earliest infections like malaria to modern-day health crises such as SARS, these fascinating titles explore not only the causes of these diseases and their role in the history of humankind but also the human toll inflicted by these epidemics. In this gripping examination of the origin and spread of the deadly SARS virus, this award winning author explores the first few SARS cases in China and the disease's subsequent spread across Asia and North America. This is the exciting story of how scientists around the world raced to find out how SARS spread and how they transmitted their findings to the frightened public. The newest discoveries are covered, including the medical determination that the SARS virus can be found in human tears and may be transmitted through the act of crying. Straightforward language makes difficult scientific concepts clear for young readers.