This book reviews much of the up-to-gate research literature and the authors' data on the cytogenetic effects of vaccination and some infectious diseases in humans as well as in experimentally treated animals or cellular cultures. All aspects relevant to karyopathology and chromosomal aberrations induced by various infectious agents. Particular attention is paid to the process by which the immune system controls the effects of the infectious mutagens. Special attention is given to the mechanisms of karyopathological changes caused by infectious agents. The book’s supplement is included a lot of photographs of various karyopathological aberrations induced by some infectious agents. This book is an ideal reference for genetics, cytologists, medical and biological students, and for all practicing physicians.