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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">10.31631/2073-3046-2022-21-5-14-20</article-id><article-id custom-type="elpub" pub-id-type="custom">epidemiology-1670</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</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>Длительность сохранения IgG антител к новой коронавирусной инфекции COVID-19</article-title><trans-title-group xml:lang="en"><trans-title>The Level of IgG to Coronavirus Infection among the Medical Institution Employees</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3234-0080</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юнусова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yunusova</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мариям Аднановна Юнусова  – врач-эпидемиолог</p><p>Москва</p></bio><bio xml:lang="en"><p>Mariam A. Yunusova – epidemiologist</p><p>Moscow</p></bio><email xlink:type="simple">yunusova.mariam@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/0000-0001-7031-2315</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Луценко</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Lutsenko</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Сергеевна Луценко – заведующая эпидемиологическим отделом</p><p>Москва</p></bio><bio xml:lang="en"><p>Ekaterina S. Lutsenko, – head of the Epidemiological department</p><p>Moscow</p></bio><email xlink:type="simple">es.lutsenko1972@icloud.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5587-8860</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цапкова</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsapkova</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Николаевна Цапкова  – доцент кафедры эпидемиологии и  доказательной медицины</p><p>Москва</p></bio><bio xml:lang="en"><p>Natalia N. Tsapkova – Cand. Sci (Med), associate professor at the Department of Epidemiology and evidence-based medicine of Institute of Public Health</p><p>Moscow</p></bio><email xlink:type="simple">tsapkova_n_n@staff.sechenov.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5587-8860</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бражников</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Brazhnikov</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Юрьевич Бражников – доцент кафедры эпидемиологии и  доказательной медицины</p><p>Москва</p></bio><bio xml:lang="en"><p>Alexey Yu. Brazhnikov – Cand. Sci (Med), associate professor at the Department of Epidemiology and evidence-based medicine of Institute of Public Health</p><p>Moscow</p></bio><email xlink:type="simple">brazhnikov_a_yu@staff.sechenov.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7329-2268</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Салтыкова</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Saltykova</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Сергеевна Салтыкова – доцент кафедры эпидемиологии и  доказательной медицины</p><p>Москва, ул. Большая Пироговская, д. 2, стр. 2</p></bio><bio xml:lang="en"><p>Tatiana S. Saltykova – Cand. Sci (Med), associate professor at the Department of Epidemiology and evidence-based medicine of Institute of Public Health</p><p>Moscow</p></bio><email xlink:type="simple">saltykova_t_s@staff.sechenov.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4925-5421</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юдина</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Yudina</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктория Сергеевна Юдина – аспирант кафедры эпидемиологии и доказательной медицины</p><p>Москва</p></bio><bio xml:lang="en"><p>Victoria S. Yudina – postgraduate at the Department of Epidemiology and evidence-based medicine of Institute of Public Health</p><p>Moscow</p></bio><email xlink:type="simple">udina_v_s@staff.sechenov.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ Национальный медицинский исследовательский центр оториноларингологии (НМИЦО) ФМБА России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>The National Medical Research Center for Otorhinolaryngology of the Federal Medico-Biological Agency of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАОУ ВО Первый МГМУ им. И. М.Сеченова (Сеченовский Университет) Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sechenov University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>19</day><month>11</month><year>2022</year></pub-date><volume>21</volume><issue>5</issue><fpage>14</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Юнусова М.А., Луценко Е.С., Цапкова Н.Н., Бражников А.Ю., Салтыкова Т.С., Юдина В.С., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Юнусова М.А., Луценко Е.С., Цапкова Н.Н., Бражников А.Ю., Салтыкова Т.С., Юдина В.С.</copyright-holder><copyright-holder xml:lang="en">Yunusova M.A., Lutsenko E.S., Tsapkova N.N., Brazhnikov A.Y., Saltykova T.S., Yudina V.S.</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/1670">https://www.epidemvac.ru/jour/article/view/1670</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. В условиях пандемии особую значимость приобретают исследования, посвящённые изучению длительности сохранения иммунитета у переболевших COVID-19 и формированию устойчивости к новой коронавирусной инфекции. Цель. Изучить сроки сохранения IgG в сыворотке крови сотрудников медицинского учреждения, переболевших новой коронавирусной инфекцией COVID-19.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Оценка сроков формирования IgG была впервые проведена через 3 недели после перенесённого заболевания у сотрудников НМИЦО ФМБА с апреля 2020 г. по декабрь 2020 г. Далее интервалы забора крови на исследование динамики антител к коронавирусной инфекции составляли 3–4 недели (по 9 заборов крови у каждого). Антитела исследовали методом ИФА; иммунологический метод определения IgG (тест система – «Вектор Бест», полуколичественный анализ). Статистическую обработку результатов исследования проводили с использованием пакета статистических программ SPSS-22 и статистического калькулятора OpenEpi ver. 3.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Доля переболевших COVID-19 сотрудников медицинского учреждения составила 39%, среди них превалировали лица в возрасте от 36 до 55 лет. Было установлено, что иммуноглобулины класса G сохраняются от семи месяцев и более у 56,3% участвовавших в наблюдении (коэффициент позитивности значительно выше 1,2), примерно у 12,7% переболевших IgG в сыворотке крови сохранялись около шести месяцев, у 11, 3% – около трех месяцев. Статистически значимых различий в длительности сохранения иммунитета между мужчинами и женщинами не было обнаружено.</p></sec><sec><title>Заключение</title><p>Заключение. Выявлена статистически значимая прямая связь между возрастом и длительностью сохранения иммунитета.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. In a pandemic, studies on the duration of immunity in those who have recovered from COVID-19 and the formation of resistance to a new coronavirus infection are of particular importance.</p></sec><sec><title>Target</title><p>Target. To study the retention time of IgG in the blood serum of employees of a medical institution who recovered from a new coronavirus infection COVID-19.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The assessment of the timing of the formation of IgG was first carried out 3 weeks after the illness in employees of The National Medical Research Center for Otorhinolaryngology from April 2020 to December 2020. Further, the intervals for blood sampling to study the dynamics of antibodies to coronavirus infection were 3–4 weeks (9 blood samples for each ). Antibodies were examined by ELISA; immunological method for determining IgG (test system – "Vector Best", semi-quantitative analysis). Statistical processing of the study results was carried out using the SPSS-22 statistical software package and the OpenEpiver statistical calculator. 3.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. The proportion of employees of a medical institution who recovered from COVID-19 was 39%, among them persons aged 36 to 55 years prevailed. It was found that class G immunoglobulins persist from seven months or more in 56.3% of those participating in the observation (the positivity coefficient is much higher than 1.2), in about 12.7% of those who had been ill, IgG in the blood serum persisted for about six months, in 11, 3% about three months. There were no statistically significant differences in the duration of immunity between men and women.</p></sec><sec><title>Conclusion</title><p>Conclusion. A statistically significant direct relationship was found between age and the duration of immunity. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>SARS-CoV-2</kwd><kwd>коронавирусная инфекция</kwd><kwd>IgG</kwd></kwd-group><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>SARS-CoV-2</kwd><kwd>coronavirus infection</kwd><kwd>IgG</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">Healthwaters [Internet]. 2021. Доступно на: https://www.healthwaters.ru/blog/imeyutsya-li-u-vas-immunitet-k-koronavirusnoy-infektsii/. Ссылка активна на 11 октября 2021.</mixed-citation><mixed-citation xml:lang="en">Healthwaters [Internet]. 2021. 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