This book provides the entire basic information required for the beginner of virology.  All types of viruses including subviral agents, viroids and prions are dealt in an orderly manner with profuse illustrations. A comprehensive and update account of principles of virology, taxonomy, replication strategies, diagnostic techniques and management of viral diseases is the major attraction of this book. The information provided will be useful to undergraduate and post-graduate students of all disciplines of biology including agriculture, veterinary, pharmacy and medicine. It also fulfils the long-felt needs of researchers and teachers of all biological sciences. An important book must for all college and university libraries.