During the early part of the twentieth century, there were dramatic falls in the mortality rates in many cities in the West. The reasons for this improvement are of considerable relevance today because the conditions which prevailed at that time in cities such as New York are comparable to those prevailing in many slums of the Third World today. Some early studies linked the improvements in health, as measured by mortality rates, to a better level of nutrition. The importance of nutrition is now widely accepted and there are many studies which show the association between nutrient intake and both mortality and morbidity, and in particular between breast feeding and infant mortality rates. It is sometimes assumed that, because nutrition indicators for city populations have improved, there is no longer a major problem of malnutrition in urban areas. However, it is likely that the figures hide disparities through aggregation, and studies in slums rather than cities as a whole give a much less encouraging picture. Poverty is at the root of many of the nutritional and associated health problems, but the children who will be born over the coming decades cannot afford to wait for a new economic order to provide the solution. Through the promotion of breast feeding, education, growth monitoring and food supplementation, necessary help can be targeted at this vulnerable population.
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