A fascinating and long overdue examination of viruses – from what they are and what they do, to the vital role they have played in human history.What are viruses? Do they rely on genes, like all other forms of life? Do they follow the same patterns of evolution as plants and animals?Frank Ryan answers these questions and many more in a sweeping tour of illnesses caused by viruses. For example, the common cold, measles, chicken pox, herpes and mumps, rubella, as well as less familiar examples,...