At the end of December 1929, the IV All-Union Meeting of the Scientific Advisory Bureau (NKB) of the Medsantrud Union was held in Moscow, dedicated to the study of professional hazards in medical labor. From the reports of the NKB in Moscow, Leningrad, Kharkov and other cities, it was revealed that, despite the scarcity of material resources, they had done quite a lot of work and accumulated a lot of scientific material in the field of studying occupational pathology and occupational health of medical labor. The work of the NKB in the last year, as before, was of a scientific and practical nature and was mainly focused on the following issues: 1) research on the labor and health of health workers in resorts, prisons, dentists, midwives, veterinarians, pharmacy workers, etc .; 2) the study of infectiousness, injury and disability; 3) a scientific survey of the load norms of certain categories; 4) the development of sanitary and hygienic standards of medical institutions, etc. The result of the work of the NKB was the implementation of a whole series of measures, such as: expanding the rights and benefits of workers in psychiatric hospitals, places of detention, light cabinets, etc.