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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="other" 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">1806</article-id><article-id pub-id-type="doi">10.15789/2220-7619-RMC-1806</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></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Revealing measles cases in Vietnam during the spread of a new coronavirus infection</article-title><trans-title-group xml:lang="ru"><trans-title>Выявление случаев кори во Вьетнаме в период распространения новой коронавирусной инфекции</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2188-6547</contrib-id><name-alternatives><name xml:lang="en"><surname>Lavrentieva</surname><given-names>I. N.</given-names></name><name xml:lang="ru"><surname>Лаврентьева</surname><given-names>И. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Irina N. Lavrentieva - PhD, MD (Medicine), Head of the Laboratory of Experimental Virology, St. Petersburg Pasteur Institute.</p><p>197101, St. Petersburg, Mira str., 14.</p><p>Phone: +7 (812) 232-94-11 (office).</p></bio><bio xml:lang="ru"><p>Лаврентьева Ирина Николаевна – доктор медицинских наук, заведующая лабораторией экспериментальной вирусологии.</p><p>197101, Санкт-Петербург, ул. Мира, 14.</p><p>Тел.: 8 (812) 232-94-11 (служебн.).</p></bio><email>pasteur.lawr@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3444-1360</contrib-id><name-alternatives><name xml:lang="en"><surname>Hoang</surname><given-names>M.</given-names></name><name xml:lang="ru"><surname>Хоанг</surname><given-names>М.</given-names></name></name-alternatives><address><country country="VN">Viet Nam</country></address><bio xml:lang="en"><p>Researcher, Department of Microbiology and Immunology, Ho Chi Minh Pasteur Institute.</p><p>Ho Chi Minh City.</p></bio><bio xml:lang="ru"><p>Научный сотрудник отдела микробиологии и иммунологии.</p><p>Хошимин.</p></bio><email>hoangminh_bio@yahoo.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7763-535X</contrib-id><name-alternatives><name xml:lang="en"><surname>Antipova</surname><given-names>A. Y.</given-names></name><name xml:lang="ru"><surname>Антипова</surname><given-names>А. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Researcher, Laboratory of Experimental Virology, St. Petersburg Pasteur Institute.</p><p>St. Petersburg.</p></bio><bio xml:lang="ru"><p>Кандидат биологических наук, научный сотрудник лаборатории экспериментальной вирусологии.</p><p>Санкт-Петербург.</p></bio><email>anti130403@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5184-0315</contrib-id><name-alternatives><name xml:lang="en"><surname>Bichurina</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Бичурина</surname><given-names>М. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, MD (Medicine), Head of the Virological Laboratory of the Measles and Rubella Elimination Center, St. Petersburg Pasteur Institute.</p><p>St. Petersburg.</p></bio><bio xml:lang="ru"><p>Доктор медицинских наук, заведующая вирусологической лабораторией центра по элиминации кори и краснухи.</p><p>Санкт-Петербург.</p></bio><email>poliospb@nr3854.spb.edu</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Totolyan</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>Areg A. Totolian  - RAS Full Member, PhD, MD (Medicine), Professor,Director of St. Petersburg Pasteur Institute.</p><p>St. Petersburg.</p></bio><bio xml:lang="ru"><p>Арег А. Тотолян - академик РАН, доктор медицинских наук, профессор, директор.</p><p>Санкт-Петербург.</p></bio><email>totolian@spbraaci.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">НИИ эпидемиологии и микробиологии имени Пастера</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Ho Chi Minh Pasteur Institute</institution></aff><aff><institution xml:lang="ru">Институт имени Пастера в г. Хошимин</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-03-12" publication-format="electronic"><day>12</day><month>03</month><year>2022</year></pub-date><volume>12</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>105</fpage><lpage>112</lpage><history><date date-type="received" iso-8601-date="2021-10-12"><day>12</day><month>10</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-11-12"><day>12</day><month>11</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Lavrentieva I.N., Hoang M., Antipova A.Y., Bichurina M.A., Totolyan A.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Лаврентьева И.Н., Хоанг М., Антипова А.Ю., Бичурина М.А., Тотолян А.А.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Lavrentieva I.N., Hoang M., Antipova A.Y., Bichurina M.A., Totolyan A.A.</copyright-holder><copyright-holder xml:lang="ru">Лаврентьева И.Н., Хоанг М., Антипова А.Ю., Бичурина М.А., 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/1806">https://iimmun.ru/iimm/article/view/1806</self-uri><abstract xml:lang="en"><p><italic>Introduction</italic>. According to the WHO Strategic Plan, five out of six geographical regions were expected to achieve measles elimination by 2020, among which is the Western Pacific Region (WPR), which includes the Socialist Republic of Vietnam (VNM). In 2019, 14 156 measles cases were detected in Vietnam, which significantly exceeds the level required to achieve its elimination (less than 1 case per 1 million population). Analyzing the causes of the ongoing measles virus circulation in diverse global regions is very important. It is also important to assess a potential impact on the measles incidence due to anti-epidemic measures aimed at combating the COVID-19 pandemic. This research is devoted to revealation measles cases in South Vietnam within the period covering January 2020 to March 2021. <italic>Materials and methods</italic>. 799 samples of blood sera obtained from different territories of South Vietnam in 2020–2021 were examined for IgM antibodies against measles virus using the Anti-Measles Virus ELISA (IgM) test system (Euroimmun, Germany). The presence of IgM measles virus antibodies in the blood serum was assessed as an acute measles infection. <italic>Results</italic>. The measles virus was actively circulating in South Vietnam in the first months of 2020. Residents of large cities and industrial centers were mainly involved in the epidemic process. Measles spread mainly among unvaccinated (71.58%) subjects, or who was unaware of vaccinations (25.48%), but also among those who were vaccinated (2.12%) and revaccinated (0.64%). The absolute majority of cases (71%) affected children under the age of three, with a predominance of those at the first year of life. Among the latter, 48% were children aged 7-9 months old. In March- April 2020, there was a sharp decrease in the number of measles cases in South Vietnam, down to a sporadic level (from May 2020 to March 2021). This is probably due to the anti-epidemic measures that were carried out in the VNM in order to limit the spread of COVID-19. Consequently, after the restrictions are lifted, we can expect an increase in the measles incidence in VNM.</p></abstract><trans-abstract xml:lang="ru"><p><italic>Введение</italic>. Согласно стратегическому плану ВОЗ, к 2020 г. пять из шести географических регионов должны были достигнуть элиминации кори. Западно-Тихоокеанский регион (ЗТР), включающий Социалистическую Республику Вьетнам (СРВ), входит в их число. В 2019 г. во Вьетнаме было выявлено 14 156 случаев кори, что существенно превышает уровень, необходимый для достижения элиминации (менее 1 случая на 1 млн населения). Анализ причин продолжающейся циркуляции вируса кори в разных регионах мира представляется весьма важным. Важно также оценить возможное влияние на заболеваемость корью противоэпидемических мер, направленных на борьбу с пандемией COVID-19. Данное исследование посвящено выявлению случаев кори в Южном Вьетнаме с января 2020 по март 2021 г. <italic>Материалы и методы</italic>. На IgM-антитела к вирусу кори было исследовано 799 образцов сывороток крови, полученных с разных территорий Южного Вьетнама в 2020–2021 гг. Использовали тест-систему Anti-Measles Virus ELISA (IgM) (Euroimmun, Германия). Наличие в сыворотке крови IgM-антител к вирусу кори оценивали как острую коревую инфекцию. <italic>Результаты</italic>. Вирус кори активно циркулировал в Южном Вьетнаме в первые месяцы 2020 года. В эпидемический процесс преимущественно были вовлечены жители крупных городов и промышленных центров. Корь распространялась в основном среди непривитых (71,58%) или не имеющих сведений о прививках (25,48%), но среди заболевших были и вакцинированные (2,12%), и ревакцинированные (0,64%) лица. Абсолютное большинство заболевших (71%) — дети в возрасте до трех лет, с преобладанием детей первого года жизни. Среди последних 48% составили дети 7–9 месяцев. В марте-апреле 2020 г. отмечено резкое снижение количества случаев кори в Южном Вьетнаме, до спорадического уровня (с мая 2020 до марта 2021 г.). Это связано, по-видимому, с противоэпидемическими мероприятиями, которые проводились в СРВ с целью ограничения распространения COVID-19. Следовательно, после снятия ограничений можно ожидать повышения заболеваемости корью в СРВ.</p></trans-abstract><kwd-group xml:lang="en"><kwd>South Vietnam</kwd><kwd>measles</kwd><kwd>age groups</kwd><kwd>pandemic</kwd><kwd>COVID-19</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Южный Вьетнам</kwd><kwd>корь</kwd><kwd>возрастные группы</kwd><kwd>пандемия</kwd><kwd>COVID-19</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1.	Антипова А.Ю., Бичурина М.А., Лаврентьева И.Н. К вопросу о реализации программы элиминации кори в странах Западно-Тихоокеанского региона ВОЗ // Инфекция и иммунитет. 2018. Т. 8, № 4. С. 465–472. doi: 10.15789/2220-7619-2018-4-465-472</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>2.	Лаврентьева И.Н., Бичурина М.А., Антипова А.Ю., Камара Ж., Магассуба Н’Ф. Выявление случаев кори в Гвинейской Республике в 2017–2018 гг. // Инфекция и иммунитет. 2020. Т. 10, № 3. 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