title: Medical conquest of the "big ditch".
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008288:Malaria / Q000266:history*; D008887:Military Medicine / Q000266:history*; D010177:Panama Canal Zone; D014481:United States; D015004:Yellow Fever / Q000266:history*