Koch's postulates and the search for the AIDS agent.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000382:microbiology* / Q000517:prevention & control; D001294:Attitude to Health; D005060:Europe; D005858:Germany; D006266:Health Education; D049672:History, 19th Century; D049673:History, 20th Century; D006716:Homosexuality; D006801:Humans; D014376:Tuberculosis / Q000453:epidemiology / Q000266:history / Q000382:microbiology; D014481:United States