[Health and ecological problems connected with development of the North].

Nature and climate determine the conditions of life and work in the North, a complex ecological and sanitary situation in the newly-explored Northern regions of the country. To maintain and improve health of the population of these regions is a problem of utmost complexity and importance. A number of research institutes of the USSR AMS and Ministry of Health deal with these problems, within the framework of the programme "Health of Man in Siberia". A new important trend in the research into the hygienic problems is to study the populational health status and morbidity patterns based on the systemic approach taking into account the effects of all environmental factors and, in particular, the working conditions, nutrition, habitat, social events, and mode of life.