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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">epidemiology</journal-id><journal-title-group><journal-title xml:lang="ru">Эпидемиология и Вакцинопрофилактика</journal-title><trans-title-group xml:lang="en"><trans-title>Epidemiology and Vaccinal Prevention</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-3046</issn><issn pub-type="epub">2619-0494</issn><publisher><publisher-name>«Numicom» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31631/2073-3046-2021-20-2-12-17</article-id><article-id custom-type="elpub" pub-id-type="custom">epidemiology-1221</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНАЯ СТАТЬЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Динамика изменений популяционного иммунитета к вирусу SARS-CоV-2 у жителей Иркутской области в условиях пандемии COVID-19</article-title><trans-title-group xml:lang="en"><trans-title>Dynamics of changes in population immunity to the SARS-CоV-2 virus in residents the Irkutsk region in the context of the COVID-19 pandemic</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4201-5828</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Балахонов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Balakhonov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Владимирович Балахонов, д. м. н., профессор, директор</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Sergey V. Balakhonov, Dr. Sc. (Med.), Professor, Director</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">balakhonov.irk@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8561-6207</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дубровина</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Dubrovina</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валентина Ивановна Дубровина, д. б. н., заведующая лабораторией патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Valentina I. Dubrovina,Dr. Sc. (Biol.), Head of the Pathophysiological Laboratory</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">dubrovina-valya@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6381-4517</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пятидесятникова</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Pyatidesyatnikova</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анна Борисовна Пятидесятникова, младший научный сотрудник лаборатории патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Anna B. Pyatidesyatnikova, Junior Research Officer at the Pathophysiological Laboratory</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">adm@chumin.irkutsk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5589-9522</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брюхова</surname><given-names>Д. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Briukhova</surname><given-names>D. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дарья Дмитриевна Брюхова, младший научный сотрудник лаборатории патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Daria D. Briukhova, Junior Research Officer at the Pathophysiological Laboratory</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">darabrukhov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6678-2998</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Киселева</surname><given-names>Н. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiseleva</surname><given-names>N. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Олеговна Киселева, лаборант-исследователь лаборатории патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Natalia O. Kiseleva, laboratory assistant-researcher at the Pathophysiological Laboratory</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">nata13026@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1137-6049</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корытов</surname><given-names>К. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Korytov</surname><given-names>K. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Константин Михайлович Корытов, научный сотрудник лаборатории патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Konstantin M. Korytov, Research Officer at the Laboratory of Pathophysiology</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">adm@chumin.irkutsk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0685-7625</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Войткова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Voitkova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валентина Владимировна Войткова, к. б. н., старший научный сотрудник лаборатории патофизиологии</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Valеntina V. Voitkova, Cand. Sc. (Biol.), Senior Research Officer at the Laboratory of Pathophysiology</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">adm@chumin.irkutsk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5678-468X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пережогин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Perezhogin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Николаевич Пережогин, заведующий отделом санитарной охраны и мониторинга чрезвычайных ситуаций</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Alexey N. Perezhogin, head of the department of sanitary protection and monitoring of emergency situations</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">adm@chumin.irkutsk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5489-9363</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чеснокова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chesnokova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маргарита Валентиновна Чеснокова, д. м. н., заведующая отделом научного и учебно-методического обеспечения</p><p>Иркутск, ул. Трилиссера, 78</p></bio><bio xml:lang="en"><p>Margarita V. Chesnokova, Dr. Sc. (Med.), Professor, Head of the Department of Scientific and Educational-Methodological Support</p><p>Irkutsk, Trilissera St., 78</p></bio><email xlink:type="simple">mar_chumin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гаврилова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gavrilova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Анатольевна Гаврилова, заместитель начальника отдела эпидемиологического надзора</p><p>Иркутск, ул. Карла Маркса, 8</p></bio><bio xml:lang="en"><p>Tatyana A. Gavrilova, Deputy Head of the Epidemiological Surveillance Department</p><p>Irkutsk, Karla Marksa St, 8</p></bio><email xlink:type="simple">epid@38.rospotrebnadzor.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Селедцов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Seledtcov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Анатольевич Селедцов, начальник управления развития системы здравоохранения</p><p>Иркутск, ул. Карла Маркса, 29</p></bio><bio xml:lang="en"><p>Alexander A. Seledtcov, Head of the Department of Health System Development</p><p>Irkutsk, Karla Marksa St, 29</p></bio><email xlink:type="simple">guzio@guzio.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУЗ Иркутский научно-исследовательский противочумный институт Сибири и Дальнего Востока Роспотребнадзора</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk Antiplague Research Institute of Siberia and Far East of Rospotrebnadzor</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Управление Роспотребнадзора по Иркутской области</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Rospotrebnadzor Administration for Irkutsk Region</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Управление развития системы здравоохранения министерства здравоохранения Иркутской области</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ministry of Health of the Irkutsk Region</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>01</day><month>05</month><year>2021</year></pub-date><volume>20</volume><issue>2</issue><fpage>12</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Балахонов С.В., Дубровина В.И., Пятидесятникова А.Б., Брюхова Д.Д., Киселева Н.О., Корытов К.М., Войткова В.В., Пережогин А.Н., Чеснокова М.В., Гаврилова Т.А., Селедцов А.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Балахонов С.В., Дубровина В.И., Пятидесятникова А.Б., Брюхова Д.Д., Киселева Н.О., Корытов К.М., Войткова В.В., Пережогин А.Н., Чеснокова М.В., Гаврилова Т.А., Селедцов А.А.</copyright-holder><copyright-holder xml:lang="en">Balakhonov S.V., Dubrovina V.I., Pyatidesyatnikova A.B., Briukhova D.D., Kiseleva N.O., Korytov K.M., Voitkova V.V., Perezhogin A.N., Chesnokova M.V., Gavrilova T.A., Seledtcov A.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.epidemvac.ru/jour/article/view/1221">https://www.epidemvac.ru/jour/article/view/1221</self-uri><abstract><p>Актуальность. Пандемия COVID-19 в мире и в России была и продолжает оставаться главным событием. В связи с этим изучение закономерностей развития и проявлений эпидемического процесса новой коронавирусной инфекции COVID-19 является актуальным направлением исследований. Важная роль в борьбе с этим вирусным заболеванием отводится изучению развития популяционного иммунитета к вирусу SARS-CoV-2 с целью оценки динамики серопревалентности и процесса формирования постинфекционного гуморального иммунитета, прогноза развития эпидемиологической ситуации, выявления особенностей эпидемического процесса, а также планирования мероприятий по специфической и неспецифической профилактике заболевания. Цель исследования – определение уровня и структуры популяционного иммунитета к SARS-CoV-2 среди населения Иркутской области в период пандемии COVID-19. Материалы и методы. В рамках проекта Роспотребнадзора по оценке популяционного иммунитета к SARS-CoV-2 у населения Российской Федерации проведено обследование населения Иркутской области в периоды с 23.06.2020 г. по 19.07.2020 г. (1-й этап), с 16.09.2020 г. по 25.09.2020 г. (2-й этап) и с 7.12.2020 г. по 18.12.2020 г. (3-й этап) с учетом протокола, рекомендованного ВОЗ. Содержание антител к SARS-CoV-2 определяли методом иммуноферментного анализа с использованием набора реагентов для анализа сыворотки или плазмы крови человека на наличие специфических иммуноглобулинов класса G к нуклеокапсиду вируса SARS-CoV-2. Результаты. Показано, что в период эпидемического подъема заболеваемости COVID-19 сформировался невысокий уровень серопревалентности (1-й этап – 5,8 ± 0,5%; 2-й этап –12,1 ± 0,7%), а в условиях длительного максимального роста заболеваемости – 25,9 ± 1,0% (3-й этап). Значительная доля бессимптомных форм инфекции на первых двух этапах исследования (1-й этап – 81,2 ± 3,2%, 2-й этап – 90,9 ± 1,9%) характеризует высокую интенсивность скрыто развивающегося эпидемического процесса. Высокий уровень IgG у перенесших COVID-19 сохранялся в среднем от 3 до 4,5 месяцев. Заключение. Результаты оценки популяционного иммунитета к вирусу SARS-CoV-2 у населения Иркутской области свидетельствуют о том, что уровень серопревалентности на 3-м этапе исследования составил 25,9%. После перенесенного заболевания в среднем у 41,6% лиц антитела не выявлены. Полученные результаты следует учитывать при организации профилактических мероприятий, включая вакцинацию, и прогнозировании заболеваемости.</p></abstract><trans-abstract xml:lang="en"><p>Background. The ongoing COVID-19 pandemic in the world and in Russia remains the main event in 2020. A comprehensive study of the patterns of development and manifestations of the epidemic process of the new coronavirus infection COVID-19 is an urgent line of research. One of the important aspects of the fight against COVID-19 is the study of population immunity to the SARS-CoV-2 virus in order to assess seroprevalence and the formation process of post-infectious humoral immunity to SARS-CoV-2, forecast the development of the epidemiological situation, identify the features of the epidemic process, as well as planning measures for specific and non-specific disease prevention. The aim of the research is to determine the level and structure of population immunity to SARS-CoV-2 among the humans of the Irkutsk region during the COVID-19 epidemic. Materials and methods. As part of the Rospotrebnadzor project to assess population immunity to SARS-CoV-2 in the population of the Russian Federation, research is being conducted among the population of the Irkutsk region in the periods from 06/23/2020 to 07/19/2020 (stage 1), from 09/16/2020 to 09/25/2020 (Stage 2) and from 12/07/2020 to 12/18/2020 (stage 3), taking into account the reacted one recommended by the WHO. The content of antibodies to SARS-CoV-2 was determined by ELISA using a set of tests for human serum or plasma for specific immunoglobulins of class G to the nucleocapsid of the SARS-CoV-2 virus produced by FBUN GNCPMiB Rospotrebnadzor (Obolensk). The results of a research of the humoral immunity of volunteers show that during the period of an epidemic rise in the incidence of COVID-19 in the Irkutsk region, a low level of seroprevalence was formed (stage 1 – 5.8 ± 0.5%, stage 2 – 12,1 ± 0,7%), and in conditions of a long-term maximum increase in the incidence rate ¬– 25,9±1,0% (stage 3). A significant proportion (stage 1 – 81,2±3,2%, stage 2 – 90.9 ±1,9%) of asymptomatic forms of infection characterize the high intensity of the latently developing epidemic process in the first two stages. High levels of IgG in reconvalescents of COVID-19 persisted for an average of 3 to 4.5 months. Conclusion. The results of assessing the population immunity to the SARS-CoV-2 virus in the population of the Irkutsk region indicate that the seroprevalence level at the 3rd stage of the research was 25.9%. After the disease, on average, 41.6% of persons did not detect antibodies. The results obtained should be taken into account when organizing preventive measures, including vaccination, and predicting morbidity.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гуморальный иммунитет</kwd><kwd>специфические антитела</kwd><kwd>COVID-19</kwd><kwd>SARS-CoV2</kwd></kwd-group><kwd-group xml:lang="en"><kwd>humoral immunity</kwd><kwd>specific antibodies</kwd><kwd>COVID-19</kwd><kwd>SARS-CoV2</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Wu P, Hao X, Lau EHY, Wong JY, Leung KSM, et al. Real-time tentative assessment of the epidemiological characteristics of novel coronavirus infections in Wuhan, China, as at 22 January 2020. Euro Surveill. 2020;25(3):2000044. DOI: 10.2807/1560-7917.ES.2020.25.3.2000044.</mixed-citation><mixed-citation xml:lang="en">Wu P, Hao X, Lau EHY, Wong JY, Leung KSM, et al. 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