Another good year ('79-80) for epidemiology.
D001694:Biological Warfare / Q000266:history; D003141:Communicable Diseases / Q000453:epidemiology*; D004813:Epidemiology / Q000266:history; D049673:History, 20th Century; D006801:Humans; D012036:Refugees; D014586:USSR; D014481:United States