PEDIATRICS Vol. 63 No. 2 February 1979, pp. 345
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SOME PEOPLE ARE CRITICAL

Richard C. Lewontin

The causes of the tremendous decline of mortality from infectious diseases in the last 100 years are not certain. All that is certain is that "scientific medicine" played no significant part. Water supply and sanitation are not involved, since water-borne diseases have not been the major killers. The suggestion that a reduction in crowding may have reduced the rate of transmission of respiratory diseases is not altogether convincing, since measles remains pandemic although it kills virtually no one in advanced countries. The most likely explanation, both for the historical trend and for the differences between regions of the world today, is in nutrition, although hard evidence is not easy to come by.