The article discusses the main properties associated with imperfect diagnostics of the disease, the accuracy and completeness of which determine the therapeutic strategy and prognosis of the disease. The lack of radiological control also does not allow objectifying the clinical picture of the disease. Modern specialized literature and relevant scientific information were systematically studied. The information served as the basis for our observation in the follow-up of children born with signs of SDR, in dynamics up to 3 years of age. continuing signs of immaturity in premature babies and up to 3-4 years of age, the opportunity to study the presence of these signs in pneumonia in young children depending on the gestational age was used.