Measuring the effectiveness of prevention: I.
D000397:Air Pollution / Q000517:prevention & control; D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D006262:Health; D006801:Humans; D007114:Immunization; D008019:Life Style; D008403:Mass Screening; D011314:Preventive Health Services; D012106:Research; D012945:Social Values; D014481:United States; D014876:Water Pollution / Q000517:prevention & control