Complex researches on the evaluation, of common resistance of organism, of senior classes schoolchildren.living in the urbanized, territories was performed.The analysis of the results of microbiological and immunological studies of upper respiratory ways (URW) in schoolchildren is presented, in this paper.The changes in the mi-croecological status of Stick respiratory ways, the decrease Knife Racks in the local immunity of the URW and.
common organism resistance that may later promote the development of clinically expressed, pathology or the aggravation, of the diseases of the respiratory organs were revealed.The need, of performing of the correction measures for the teenagers examined, with aim.to prevent the diseases of the respiratory organs was grounded.