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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="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of microbiology, epidemiology and immunobiology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of microbiology, epidemiology and immunobiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал микробиологии, эпидемиологии и иммунобиологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0372-9311</issn><issn publication-format="electronic">2686-7613</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">18910</article-id><article-id pub-id-type="doi">10.36233/0372-9311-682</article-id><article-id pub-id-type="edn">USUKRM</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>REVIEWS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОБЗОРЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Immunological and epidemiological effectiveness of pediatric vaccination against hepatitis A using a single dose of inactivated vaccine</article-title><trans-title-group xml:lang="ru"><trans-title>Иммунологическая и эпидемиологическая эффективность вакцинации детей против гепатита А с применением одной дозы инактивированной вакцины</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6853-4154</contrib-id><name-alternatives><name xml:lang="en"><surname>Lopatukhina</surname><given-names>Mariya A.</given-names></name><name xml:lang="ru"><surname>Лопатухина</surname><given-names>Мария Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>researcher, Laboratory of molecular epidemiology of viral hepatitis, Central Research Institute of Epidemiology; researcher, Laboratory of viral hepatitis, I.I. Mechnikov Research Institute for Vaccines and Sera</p></bio><bio xml:lang="ru"><p>н. с. лаб. молекулярной эпидемиологии вирусных гепатитов ЦНИИ Эпидемиологии Роспотребнадзора; н. с. лаб. вирусных гепатитов НИИ вакцин и сывороток им. И.И. Мечникова</p></bio><email>lopatukhina@cmd.su</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3599-117X</contrib-id><name-alternatives><name xml:lang="en"><surname>Kyuregyan</surname><given-names>Karen K.</given-names></name><name xml:lang="ru"><surname>Кюрегян</surname><given-names>Карен Каренович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Biol.), Professor of the RAS, Head, Laboratory of molecular epidemiology of viral hepatitis, Central Research Institute of Epidemiology; leading researcher at the Laboratory of viral hepatitis, I.I. Mechnikov Research Institute for Vaccines and Sera</p></bio><bio xml:lang="ru"><p>д-р биол. наук, профессор РАН, зав. лаб. молекулярной эпидемиологии вирусных гепатитов ЦНИИ Эпидемиологии Роспотребнадзора; в. н. с. лаб. вирусных гепатитов НИИ вакцин и сывороток им. И.И. Мечникова; профессор каф. вирусологии Российской медицинской академии непрерывного профессионального образования</p></bio><email>kyuregyan@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6636-6801</contrib-id><name-alternatives><name xml:lang="en"><surname>Mikhailov</surname><given-names>Mikhail I.</given-names></name><name xml:lang="ru"><surname>Михайлов</surname><given-names>Михаил Иванович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med,), Full Member of the RAS, chief researcher, Laboratory of molecular epidemiology of viral hepatitis, Central Research Institute of Epidemiology; Head, Laboratory of viral hepatitis, I.I. Mechnikov Research Institute for Vaccines and Sera; Professor, Department of epidemiology, Belgorod State National Research University</p></bio><bio xml:lang="ru"><p>д-р мед. наук, акад. РАН, г. н. с. лаб. молекулярной эпидемиологии вирусных гепатитов ЦНИИ Эпидемиологии» Роспотребнадзора; зав. лаб. вирусных гепатитов НИИ вакцин и сывороток им. И.И. Мечникова; профессор каф. эпидемиологии Белгородского государственного национального исследовательского университета</p></bio><email>michmich2@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Central Research Institute of Epidemiology</institution></aff><aff><institution xml:lang="ru">Центральный научно-исследовательский институт эпидемиологии Роспотребнадзора</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Mechnikov Research Institute for Vaccines and Sera</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт вакцин и сывороток имени И.И. Мечникова</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian Medical Academy of Continuous Professional Education</institution></aff><aff><institution xml:lang="ru">Российская медицинская академия непрерывного профессионального образования</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Belgorod National Research University</institution></aff><aff><institution xml:lang="ru">Белгородский государственный национальный исследовательский университет</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-08-11" publication-format="electronic"><day>11</day><month>08</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-11-05" publication-format="electronic"><day>05</day><month>11</month><year>2025</year></pub-date><volume>102</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>626</fpage><lpage>634</lpage><history><date date-type="received" iso-8601-date="2025-08-11"><day>11</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-08-11"><day>11</day><month>08</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Lopatukhina M.A., Kyuregyan K.K., Mikhailov M.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Лопатухина М.А., Кюрегян К.К., Михайлов М.И.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Lopatukhina M.A., Kyuregyan K.K., Mikhailov M.I.</copyright-holder><copyright-holder xml:lang="ru">Лопатухина М.А., Кюрегян К.К., Михайлов М.И.</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://microbiol.crie.ru/jour/article/view/18910">https://microbiol.crie.ru/jour/article/view/18910</self-uri><abstract xml:lang="en"><p>Hepatitis A is an acute liver disease caused by the hepatitis A virus (HAV), which can be prevented by means of vaccination. The standard hepatitis A vaccination schedule consists of two doses of inactivated vaccine, but for economic reasons and the purpose of improving vaccination coverage, universal pediatric single-dose vaccination programs have been implemented in certain regions of the world.</p> <p>The <bold>aim</bold> of this review is to summarize and analyze published data on the duration of protective antibody levels after a single-dose pediatric immunization, as well as hepatitis A incidence in countries where hepatitis A vaccination is carried out using a single dose of inactivated vaccine.</p> <p>Recent data from different regions of the world, including the Russian Federation, support the effectiveness of the single-dose hepatitis A vaccination strategy, both in terms of the duration of the immune response and the impact on the incidence rates. However, further studies on the long-term effectiveness of single-dose immunization with inactivated vaccine, as well as continuous hepatitis A surveillance, are necessary to assess the duration of protection and the necessity for booster vaccination later in life</p></abstract><trans-abstract xml:lang="ru"><p>Гепатит А — это острое заболевание печени, вызываемое вирусом гепатита А, которое можно предотвратить с помощью вакцинации. Стандартная схема вакцинации против гепатита А предполагает введение двух доз инактивированной вакцины, однако по экономическим соображениям и для повышения уровня охвата вакцинацией в некоторых регионах мира внедрены программы массовой вакцинации детей с применением одной дозы вакцины.</p> <p><bold>Целью</bold> обзора является обобщение и анализ опубликованных данных о длительности сохранения протективных уровней антител после однократной иммунизации детей, а также о заболеваемости в странах, в которых проводится вакцинопрофилактика гепатита А с использованием одной дозы инактивированной вакцины.</p> <p>Данные последних лет, полученные в разных регионах мира, в том числе в России, подтверждают эффективность стратегии вакцинации против гепатита А с применением одной дозы вакцины как с точки зрения длительности сохранения иммунологического ответа, так и с точки зрения влияния на уровни регистрируемой заболеваемости. Однако для оценки продолжительности защиты и необходимости ревакцинации на более позднем этапе жизни необходимы дальнейшие исследования по долгосрочной эффективности стратегий вакцинации с применением одной дозы инактивированной вакцины, а также непрерывный надзор за гепатитом А.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hepatitis A</kwd><kwd>hepatitis A vaccine</kwd><kwd>single-dose immunization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гепатит А</kwd><kwd>вакцина против гепатита А</kwd><kwd>однократная иммунизация</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Guo Y., Zhang L., Feng D., et al. The impact of universal live attenuated hepatitis A vaccines in Henan, China, 2005–2018. Int. J. Infect. Dis. 2020;93:163–7. DOI: https://doi.org/10.1016/j.ijid.2020.02.001</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Stuurman A.L., Marano C., Bunge E.M., et al. 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