title: Koch's postulates and the search for the AIDS agent.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology* / Q000517:prevention & control; D001432:Bacteriology / Q000266:history; D004812:Epidemiologic Methods; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009519:New York City; D014397:Tuberculosis, Pulmonary / Q000209:etiology / Q000266:history / Q000517:prevention & control; D006113:United Kingdom