The primacy of prevention.
D003140:Communicable Disease Control; D004467:Economics; D004470:Economics, Medical; D004777:Environment; D004813:Epidemiology / Q000266:history; D006266:Health Education; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007114:Immunization; D008403:Mass Screening; D011315:Preventive Medicine / Q000266:history*; D012922:Social Change; D014481:United States