Robert Koch and the modern investigator.
Weller
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Harvard School of Public Health, Boston.
D000163:Acquired Immunodeficiency Syndrome / Q000821:virology; D000818:Animals; D003141:Communicable Diseases / Q000209:etiology / Q000266:history*; D005060:Europe; D049672:History, 19th Century; D006801:Humans; D012106:Research / Q000639:trends