On the importance of refrigeration in the battle against disease. The title refers to the speed with which bacteria multiply if their reproduction is not inhibited by cold. Includes shot of a professor lecturing in a college classroom; a train; truck on highway; etc. Describes the improvement of general health brought about by mechanical refrigeration & quick transportation of foods. Explains relations between temperature & food spoilage. Gives advice on purchase, use & care of a refrigerator.