Here is a small, well printed volume which will be indispensable to teachers and investigators in the field of virology. Most practicing internists will also find it interesting and exciting. For those not actively at work in the field of microbiology, much of the material presented will be startlingly new. The precision with which most viruses now can be studied and photographed, as illustrated by the excellent reproductions of electron microscope preparations, will be a revelation.
Dr. Richard E. Shope's account of the spread of viruses from infected to susceptible hosts adds another chapter to the brilliant and fascinating story of the elucidation of the epidemiology of infectious disease, ranking possibly in importance with the contributions of Jenner and Pasteur. For instance, in his efforts to determine why epidemics of swine influenza began explosively on many farms in a given area almost simultaneously, he was forced to the conclusion that