Virus Season 1 Episode 7 Killers and Carcinogens ( Air Date 1960-02-12 ) Genre Documentary, Talk category. Overview "Discuses virus diseases. Reviews the known viral diseases and the development of vaccination. Explains how a polio virus attacks a cell. Analyzes the activity of viruses, which cause cancer in animal cells. Demonstrates how virus cultures can be grown and used for inoculation. Concludes by discussing cures for viral diseases.".