About the book: 1969 / ⠀⠀ ⠀⠀ ⠀⠀This is a book about how man discovered the world of ultra-small creatures. About the viruses that cause smallpox and rabies, influenza and polio, yellow fever and foot-and-mouth disease. About scientists who have been struggling for decades to see and neutralize these invisible creatures. About how a virus that tricks itself into a cell sometimes becomes an assistant to a scientist who reveals the secret of life. About what a virus is - a creature or a substance ?In the center of the book is the image of the remarkable Russian scientist D.I. Ivanovsky, the discoverer of viruses.