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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">Russian Journal of Infection and Immunity</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Infection and Immunity</journal-title><trans-title-group xml:lang="ru"><trans-title>Инфекция и иммунитет</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2220-7619</issn><issn publication-format="electronic">2313-7398</issn><publisher><publisher-name xml:lang="en">SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17644</article-id><article-id pub-id-type="doi">10.15789/2220-7619-API-17644</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</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">Arvi pattern in the Northwest federal district during the COVID-19 pandemic (2021–2022)</article-title><trans-title-group xml:lang="ru"><trans-title>Структура ОРВИ в Северо-Западном федеральном округе в период пандемии COVID-19 (2021–2022 гг.)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sbarzaglia</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Сбарцалья</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Researcher, Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>к.б.н., научный сотрудник лаборатории молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gladkikh</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Гладких</surname><given-names>А. C.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Head of the Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>к.б.н., зав. лабораторией молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Milichkina</surname><given-names>D. M.</given-names></name><name xml:lang="ru"><surname>Миличкина</surname><given-names>Д. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Research Laboratory Assistant, Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>лаборант-исследователь лаборатории молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bachevskaya</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Бачевская</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Research Laboratory Assistant, Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>лаборант-исследователь лаборатории молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popova</surname><given-names>М. R.</given-names></name><name xml:lang="ru"><surname>Попова</surname><given-names>М. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD Student, Junior Researcher, Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>аспирант, младший научный сотрудник лаборатории молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharova</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Шарова</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD Student, Junior Researcher, Laboratory of Molecular Genetic Monitoring</p></bio><bio xml:lang="ru"><p>аспирант, младший научный сотрудник лаборатории молекулярно-генетического мониторинга</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Cherepanova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Черепанова</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Acting Deputy Head of the Epidemiological Surveillance Department</p></bio><bio xml:lang="ru"><p>и.о. зав. отделом обеспечения эпидемиологического надзора</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dedkov</surname><given-names>V. G.</given-names></name><name xml:lang="ru"><surname>Дедков</surname><given-names>В. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Medicine), Deputy Director on Science, Leading Researcher</p></bio><bio xml:lang="ru"><p>к.м.н., зам. директора по науке, ведущий научный сотрудник</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Totolian</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Тотолян</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>RAS Full Member, DSc (Medicine), Professor, Head of the Laboratory of Molecular Immunology, Director </p></bio><bio xml:lang="ru"><p>академик РАН, д.м.н., профессор, зав. лабораторией молекулярной иммунологии, директор</p></bio><email>sbarzaglia@pasteurorg.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">St. Petersburg Pasteur Institute</institution></aff><aff><institution xml:lang="ru">ФБУН НИИ эпидемиологии и микробиологии имени Пастера</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Federal Hygienic and Epidemiological Center of Rospotrebnadzor</institution></aff><aff><institution xml:lang="ru">ФБУЗ Федеральный центр гигиены и эпидемиологии Роспотребнадзора</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Martsinovsky Institute of Medical Parasitology, Tropical and Vector-Borne Diseases</institution></aff><aff><institution xml:lang="ru">Институт медицинской паразитологии, тропических и трансмиссивных заболеваний им. Е.И. Марциновского</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-08-20" publication-format="electronic"><day>20</day><month>08</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-12-21" publication-format="electronic"><day>21</day><month>12</month><year>2024</year></pub-date><volume>14</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>917</fpage><lpage>926</lpage><history><date date-type="received" iso-8601-date="2024-04-26"><day>26</day><month>04</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-08-09"><day>09</day><month>08</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Sbarzaglia V.A., Gladkikh A.S., Milichkina D.M., Bachevskaya A.V., Popova М.R., Sharova A.A., Cherepanova E.A., Dedkov V.G., Totolian A.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Сбарцалья В.А., Гладких А.C., Миличкина Д.М., Бачевская А.В., Попова М.Р., Шарова А.А., Черепанова Е.А., Дедков В.Г., Тотолян А.А.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Sbarzaglia V.A., Gladkikh A.S., Milichkina D.M., Bachevskaya A.V., Popova М.R., Sharova A.A., Cherepanova E.A., Dedkov V.G., Totolian A.A.</copyright-holder><copyright-holder xml:lang="ru">Сбарцалья В.А., Гладких А.C., Миличкина Д.М., Бачевская А.В., Попова М.Р., Шарова А.А., Черепанова Е.А., Дедков В.Г., Тотолян А.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://iimmun.ru/iimm/article/view/17644">https://iimmun.ru/iimm/article/view/17644</self-uri><abstract xml:lang="en"><p>Acute respiratory viral infections still remain a pressing health problem, causing both seasonal outbreaks and epidemics and global pandemics. The emergence of a new coronavirus infection has become a serious challenge, resulting in more than 776 million cases of disease and more than 7 million deaths worldwide, which could not but affect the circulation of existing seasonal pathogens. This paper provides a retrospective analysis of the structure of acute respiratory viral infections during the height of the COVID-19 pandemic using the example of a single subject (Northwestern Federal District) in the autumn-winter periods of 2021–2022, presents the dynamics of the incidence of acute respiratory viral infections and influenza in Russia and the Northwestern Federal District, cases of co-infections were identified and analyzed. It is shown that between 2021 and 2022, the accession of a new coronavirus infection increased the overall incidence of respiratory viral infections until August 2022, and the decrease in COVID-19 incidence by the end of 2022 compared with the incidence of other respiratory viruses. ARVI pathogens that circulated during the COVID-19 pandemic were identified, namely: influenza A virus, adenoviruses, seasonal coronaviruses, rhinoviruses, bocaviruses, respiratory syncytial virus and type 3 parainfluenza virus. The results of the study showed that influenza A virus, bocaviruses and respiratory syncytial virus are more often detected as monoinfections and can influence the spread of other respiratory viruses. While adenoviruses, rhinoviruses and type 3 parainfluenza viruses are most often found in the form of co-infection with COVID-19, which creates an additional viral load in patients and can complicate the course of the disease.</p></abstract><trans-abstract xml:lang="ru"><p>Острые респираторные вирусные инфекции по-прежнему остаются актуальной проблемой здравоохранения, вызывая как сезонные вспышки и эпидемии, так и глобальные пандемии. Появление новой коронавирусной инфекции стало серьезным испытанием, повлекшим за собой более 776 млн случаев заболевания и более 7 млн смертей во всем мире, что не могло не отразиться на циркуляции уже существующих сезонных патогенов. В данной работе проведен ретроспективный анализ структуры ОРВИ в период разгара пандемии COVID-19 на примере отдельно взятого субъекта (Северо-Западного федерального округа) в осенне-зимние периоды 2021–2022 гг., представлена динамика заболеваемости ОРВИ и гриппом на территории России и СЗФО, выявлены и проанализированы случаи коинфекций. Показано, что в период с января 2021 г. по август 2022 г. присоединение новой коронавирусной инфекции увеличило общую заболеваемость респираторно-вирусными инфекциями, а также снижение заболеваемости COVID-19 к концу 2022 г. в сравнении с заболеваемостью другими респираторными вирусами. Были выявлены возбудители ОРВИ, циркулировавшие на фоне пандемии COVID-19, а именно: вирус гриппа А, аденовирусы, сезонные коронавирусы, риновирусы, бокавирусы, респираторно-синцитиальный вирус и вирус парагриппа 3 типа. Результаты исследования показали, что вирус гриппа А, бокавирусы и респираторно-синцитиальный вирус чаще выявляются в виде моноинфекций и могут влиять на распространение других респираторных вирусов. В то же время аденовирусы, риновирусы и вирусы парагриппа 3 типа чаще других встречаются в виде коинфекции с COVID-19, что создает дополнительную вирусную нагрузку у пациентов и может осложнять течение заболевания.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ARVI</kwd><kwd>influenza</kwd><kwd>COVID-19 pandemic</kwd><kwd>morbidity</kwd><kwd>respiratory viruses</kwd><kwd>co-infections</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ОРВИ</kwd><kwd>грипп</kwd><kwd>пандемия СОVID-19</kwd><kwd>заболеваемость</kwd><kwd>респираторные вирусы</kwd><kwd>коинфекции</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Киселева И.В., Ксенафонтов А.Д. Рино- и РС-вирусы в пандемию COVID-19 // Инфекция и иммунитет. 2022. Т. 12, № 5. C. 624–638. [Kiseleva I.V., Ksenafontov A.D. 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