[The health care system and its sub-systems - medical organizations: interaction with external actors (the review)]

The review was carried out by keywords "health care", "medical organizations" and "intersectoral cooperation" on the grounds of the databases of Scopus, Web of Science, MedLine, The Cochrane Library, EMBASE, Global Health, CyberLeninka and RSCI. The analysis was applied to 343 publications.The purpose of the study is to analyze experience of studying the participation of the health care system and medical organizations as its subsystems in intersectoral cooperation in protection of population health before and during the COVID-19 pandemic at the regional level.The priority role of health care sector in intersectoral cooperation in protection of population health in the Subject of the Russian Federation (by significance, activities specific weight, interaction with other actors, possible impact on determinants of population health and informative assessment vectors, impact of determinant "medical service - work of health administrations and institutions" on population health) that is significantly increasing in conditions of the COVID-19 pandemic. In most cases, medical organizations focus on collaboration of their structural units rather than external collaboration, including periods before and during the COVID-19 pandemic. The modes of evaluation of this process are not developed that complicate implementation of targeted improvement measures.It is advisable to use the specific characteristics of health care system participation in intersectoral cooperation on protection of population health before and during the COVID-19 pandemic at the regional level in the practice of health preservation. The characteristics of cooperation between medical organizations and external actors require further research.