Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hantaviruses are defined as a group of viruses carried by rodents or their urine and droppings. First identified in the early 1950s, by Korean Dr. Ho-Wang Lee and colleagues hantaviruses cause life-threatening conditions that have symptoms similar to influenza, often with fatal outcome. It is believed that campers and hikers are more likely to be affected by the disease than most people, while camping within parks, pitching tents on the forest floor and sleeping in their sleeping bags down on the ground. Learn more about hantaviruses and their prevention, by reading this book.