Any person has probably experienced the effects of viruses more than once. It can manifest itself as a mild cold or debilitating flu, or it can cause an acute attack of Ebola or Zika hemorrhagic fever, severe acute respiratory syndrome (SARS), bird flu, or AIDS, as in the 1980s. The author of the book, a virologist, decided to present to your attention the most important pathogenic viruses. You can choose to study a chapter about a specific pathogen that interests you, or read everything in a row.