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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Perm Medical Journal</journal-id><journal-title-group><journal-title xml:lang="en">Perm Medical Journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Пермский медицинский журнал (сетевое издание "Perm medical journal")</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0136-1449</issn><issn publication-format="electronic">2687-1408</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">546000</article-id><article-id pub-id-type="doi">10.17816/pmj41113-23</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original studies</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Dynamics of formation of anti- bodies to SARS-CoV-2 after coronavirus infection in children</article-title><trans-title-group xml:lang="ru"><trans-title>Динамика образования антител к SARS-CoV-2 после перенесенной коронавирусной инфекции у детей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4668-6071</contrib-id><contrib-id contrib-id-type="scopus">57205157038</contrib-id><contrib-id contrib-id-type="researcherid">R-2691-2017</contrib-id><name-alternatives><name xml:lang="en"><surname>Bogomolova</surname><given-names>Irina K.</given-names></name><name xml:lang="ru"><surname>Богомолова</surname><given-names>Ирина Кимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD,<italic> </italic>PhD,<italic> </italic>Professor,<italic> </italic>Head<italic> </italic>of<italic> </italic>the<italic> </italic>Department<italic> </italic>of<italic> </italic>Pediatrics<italic> </italic>of<italic> </italic>Medical<italic> </italic>and<italic> </italic>Dental<italic> </italic>Faculties</p></bio><bio xml:lang="ru"><p>доктор<italic> </italic>медицинских<italic> </italic>наук,<italic> </italic>профессор,<italic> </italic>проректор<italic> </italic>по<italic> </italic>учебно-воспитательной<italic> </italic>работе,<italic> </italic>заведующая<italic> </italic>кафедрой<italic> </italic>педиатрии<italic> </italic>лечебного<italic> </italic>и<italic> </italic>стоматологического<italic> </italic>факультетов</p></bio><email>bogomolova_ik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9684-2864</contrib-id><contrib-id contrib-id-type="scopus">57205157061</contrib-id><contrib-id contrib-id-type="researcherid">Q-5166-2017</contrib-id><contrib-id contrib-id-type="spin">1346-0396</contrib-id><name-alternatives><name xml:lang="en"><surname>Peregoedova</surname><given-names>Valentina N.</given-names></name><name xml:lang="ru"><surname>Перегоедова</surname><given-names>Валентина Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate<italic> </italic>of<italic> </italic>Medical<italic> </italic>Sciences,<italic> </italic>Associate<italic> </italic>Professor<italic> </italic>of<italic> </italic>the<italic> </italic>Department<italic> </italic>of<italic> </italic>Pediatrics<italic> </italic>of<italic> </italic>Medical<italic> </italic>and<italic> </italic>Dental<italic> </italic>Faculties</p></bio><bio xml:lang="ru"><p>кандидат<italic> </italic>медицинских<italic> </italic>наук,<italic> </italic>доцент<italic> </italic>кафедры<italic> </italic>педиатрии<italic> </italic>лечебного<italic> </italic>и<italic> </italic>стоматологического<italic> </italic>факультетов</p></bio><email>v.peregoedova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Chita State Medical Academy</institution></aff><aff><institution xml:lang="ru">Читинская государственная медицинская академия</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2024</year></pub-date><volume>41</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>13</fpage><lpage>23</lpage><history><date date-type="received" iso-8601-date="2023-07-11"><day>11</day><month>07</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://permmedjournal.ru/PMJ/article/view/546000">https://permmedjournal.ru/PMJ/article/view/546000</self-uri><abstract xml:lang="en"><p><bold>Objective</bold><bold>. </bold>To estimate the level of antibodies to SARS-CoV-2-IgM and SARS-CoV-2-IgG in children with COVID-19 in acute period and during 1 year period of follow-up after coronavirus infection.</p> <p><bold>Materials</bold><bold> and methods.</bold> Blood samples for the presence of IgM and IgG antibodies to SARS-CoV-2 were analyzed in 119 children aged 11.0 [10.1; 11.2] with COVID-19 in the acute period (29.4 % asymptomatic, 51.3 % mild and 19.3 % moderate), and SARS–CoV-2-IgG in the dynamics of the follow-up after 1 (<italic>n</italic>=55), 6 (<italic>n</italic>=33) and 12 (<italic>n</italic>=32) months from the moment of discharge from the hospital in a prospective cohort study. The levels of SARS-CoV-2 surface glycoprotein S, including the receptor-binding domain – RBD were measured at different time by using enzyme-linked immunosorbent assay.</p> <p><bold>Results</bold><bold>. </bold>The level of IgM positive rate for SARS-CoV-2 was initially negative in 86.6 % of children with COVID-19. The original seroconversion (on admission to the hospital) was 38.7 % and it increased to 96.7 % in 1 month and to 100 % in 12 months of observation. There were no statistically significant differences in IgG persistence depending on the age and course of COVID-19.</p> <p><bold>Conclusions</bold><bold><italic>.</italic></bold><bold> </bold>The new coronavirus infection causes a long-term response of IgG antibodies to SARS-CoV-2 which persists for one year of observation and increases by 12 months after the infection regardless of the severity of COVID-19.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель. </bold>Оценить уровень антител SARS-CoV-2-IgM и SARS-CoV-2-IgG у детей с COVID-19 в острый период и на протяжении одного года наблюдения после перенесенной коронавирусной инфекции.</p> <p><bold>Материалы и методы.</bold> В проспективном когортном исследовании проанализированы образцы крови на наличие антител класса IgM и IgG к SARS-CoV-2 от 119 детей в возрасте 11 [10,1; 11,2] лет с COVID-19 в остром периоде (29,4 % бессимптомная, 51,3 % – легкая и 19,3 % среднетяжелая форма), а также определены SARS-CoV-2-IgG в динамике наблюдения за пациентами через один (<italic>n</italic> = 55), 6 (<italic>n</italic> = 33) и 12 (<italic>n</italic> = 32) месяцев от момента выписки из стационара. Уровни поверхностного гликопротеина S SARS-CoV-2, включая рецептор-связывающий домен – RBD, измерялись в различные моменты времени с помощью иммуноферментного анализа.</p> <p><bold>Результаты. </bold>Уровень коэффициента позитивности<bold> </bold>IgM на SARS-CoV-2 изначально оказался отрицательным у 86,6 % детей с COVID-19.<bold> </bold>Исходная (на момент поступления в стационар) сероконверсия составила 38,7 %, которая увеличилась до 96,7 % через месяц и до 100 % через 12 месяцев соответствующего последующего наблюдения. Не обнаружено статистически значимых различий в отношении персистенции IgG в зависимости от возраста и степени тяжести COVID-19.</p> <p><bold>Выводы. </bold>Коронавирусная инфекция вызывает длительный ответ антител класса IgG к SARS-CoV-2, который сохраняется на протяжении года наблюдения и усиливается к 12 месяцам после инфекции независимо от степени тяжести COVID-19.</p></trans-abstract><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>new coronavirus infection</kwd><kwd>SARS-CoV-2</kwd><kwd>IgG and IgM antibodies</kwd><kwd>children</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>коронавирусная инфекция</kwd><kwd>SARS-CoV-2</kwd><kwd>антитела IgG и IgM</kwd><kwd>дети</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Guan W.J., Ni Z.Y., Hu Y., Liang W.H., Ou C.Q., He J.X., Liu L., Shan H., Lei C.L., Hui D.S.C., Du B., Li L.J., Zeng G., Yuen K.Y., Chen R.C., Tang C.L., Wang T., Chen P.Y., Xiang J., Li S.Y., Wang J.L., Liang Z.J., Peng Y.X., Wei L., Liu Y., Hu Y.H., Peng P., Wang J.M., Liu J.Y., Chen Z., Li G., Zheng Z.J., Qiu S.Q., Luo J., Ye C.J., Zhu S.Y., Zhong N.S.; China Medical Treatment Expert Group for COVID-19. 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