Abstract
A case-control study in Northern Chile provides strong evidence that arsenic in drinking water is causing human lung cancer (Epidemiology 2000; 11:673–679). A multidisciplinary Chilean-American team, lead by Catterina Ferreccio, carried out an assessment of exposure to arsenic, based on concentrations in water piped to households. They found a clear dose-response relationship between arsenic and lung cancer. In a previous epidemiological study covering the same area, the group reported that death rates from bladder cancer in Chile's second Region are 7-fold higher than in the rest of the country (Am J Epidemiol 1998; 147: 660–69).
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