Book excerpt: Propaganda played an essential role in influencing the attitudes and policies of German National Socialism on racial purity and euthanasia, but little has been said on the impact of medical hygiene films. Cinematically Transmitted Disease explores these films for the first time, from their inception during the Weimar era and throughout the years to come. In this innovative volume, author Barbara Hales demonstrates how medical films as well as feature films were circulated among the German people to embed and enforce notions of scientific legitimacy for racial superiority and genetically spread “incurable” diseases, creating and maintaining an instrumental fear of degradation in the German national population.