Features of the clinical course and the COVID-19 epidemic process in the communities of various planning patterns


DOI: https://dx.doi.org/10.18565/epidem.2022.12.1.18-24

Zadoroshnyi A.V., Pshenichnaya N.Yu., Akimkin V.G.

Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being, Moscow, Russia
Objective. To establish a relationship between the clinical and epidemiological course of COVID-19 and the duration of focal morbidity in the communities of various planning patterns.
Materials and methods. In April 15 to June 2, 2020, the investigators carried out a sampling longitudinal prospective analytical study of the course of the clinical and epidemic process in the COVID-19 foci formed in the communities of various planning patterns. There were a total of 515 COVID-19 cases.
Results. A direct relationship was found between the clinical course and features of the COVID-19 epidemic process and the duration of focal morbidity in the communities of various planning patterns. The analyzed epidemiological indicators: cumulative incidence, morbidity, and incidence density significantly increased by the second incubation period (from day 14 to day 28 since the date of registration of the first case of COVID-19 in the community). The increase in these indicators characterizing the course of the infectious process of COVID-19 was accompanied by an intensive rise in new infection cases and by a change in the clinical course of the disease. This was manifested by an increase in the total number of registered community-acquired pneumonias and a decrease in the period of their development. The increase in the intensity of the epidemic process, the change in the clinical course of COVID-19 and the timing of the development of community-acquired pneumonia directly depended on the duration of the focal process of COVID-19. The long current focus was established to have lower epidemiological indicators in the separate community compared to the reported one.
Conclusion. The long current COVID-19 foci formed in the reported and separate communities are characterized by a more intensive epidemic process; the persons who have got infection in the communities have often a severer clinical course.

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About the Autors


Alexander V. Zadorozhnyi, Resident, Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being, Moscow, Russia; AlezanderZadoroshnyy@yandex.ru
Professor,Natalia Yu. Pshenichnaya, MD, Deputy Director on Clinical and Analytical Work, Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being, Moscow, Russia; natalia-pshenichnaya@yandex.ru; https://orcid.org/0000-0003-2570-711X
Professor Vasiliy G. Akimki, MD, Academician of the Russian Academy of Sciences, Director, Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Well-Being, Moscow, Russia; vgakimkin@yandex.ru; http://orcid.org/ 0000-0003-4228-9044


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