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The textbook addresses topical issues of covidology as a new interdisciplinary science of the pandemic era of the post-animal pandemic. The methodological analysis of the theoretical and practical construct of covid motives and their justification in the post-snows time is comprehensively covered. The varieties of atypical epidemiological diseases and their mutational features in the system of covidology are clarified. The conceptual model of the pathogenesis of coronavirus disease is considered. At the same time, the functions of nanobacteria as a substation of regression and progress in the post-war world are confirmed. The consequences of post-COVID syndrome as a "booster dose" for the study of individual and state immunity in the post-anthrax period in Ukraine and the world are discussed. The manual is intended for students of special services and a wide range of readers.