The textbook describes the current state of science, shows the development of hygiene at different historical stages, addresses the problems of the hygienic significance of the environment and human ecology. The main attention is paid to health, the algorithm of hygienic diagnostics, which makes it possible to establish changes in the state of human health at the pre-pathological (pre-pathological) level, as well as information on administrative and legal forms of control of preventive measures and the health protection system of each person.