ABSTRACT
The health of a human population in a society depends not only on the supply of hygienic food with a high nutritional quality but also on several environmental factors, such as social and eco nomic conditions, women’s educational status, the implementation of immunization programs, availability of uncontaminated water, and overall agricultural development. In addition, clean housing and a pollution-free environment, as well as individual behavior relating to smoking and the use of alcohol and drugs, contribute to the health of the people. Food and nutrition influence the body’s immunity through multiple complex mechanisms, and unspecified improvements in diet have contributed to the better health of people, as evidenced by the more affluent societies throughout the world in the 1950s. Life expectancy has increased substantially and progressively, with a remarkable fall in the death rates of children. In the undeveloped countries, however, improvements in diet, hygiene, and immunization have been less effective in decreasing child hood mortality.
