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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">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</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">16728</article-id><article-id pub-id-type="doi">10.36233/0507-4088-303</article-id><article-id pub-id-type="edn">sbaerc</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</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">Effect of inactivated whole-virion concentrated purified vaccine for the prevention of COVID-19 on clinical and biochemical blood parameters of immature rats</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние инактивированной цельновирионной концентрированной очищенной вакцины для профилактики COVID-19 на клинические и биохимические параметры крови неполовозрелых крыс</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7251-6570</contrib-id><name-alternatives><name xml:lang="en"><surname>Siniugina</surname><given-names>Aleksandra A.</given-names></name><name xml:lang="ru"><surname>Синюгина</surname><given-names>Александра Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), Head of Quality and Innovation Development </p></bio><bio xml:lang="ru"><p>канд. мед. наук, руководитель направления по качеству и инновационным разработкам </p></bio><email>sinyugina@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5842-5728</contrib-id><name-alternatives><name xml:lang="en"><surname>Lycheva</surname><given-names>Natalya A.</given-names></name><name xml:lang="ru"><surname>Лычева</surname><given-names>Наталья Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Deputy Head of the Department for Preclinical Research </p></bio><bio xml:lang="ru"><p>канд. биол. наук, заместитель начальника управления разработки и внедрения полупромышленных технологий по доклиническим исследованиям</p></bio><email>Lycheva_na@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7588-3982</contrib-id><name-alternatives><name xml:lang="en"><surname>Saprykina</surname><given-names>Anastasia A.</given-names></name><name xml:lang="ru"><surname>Сапрыкина</surname><given-names>Анастасия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Research Fellow</p></bio><bio xml:lang="ru"><p>младший научный сотрудник</p></bio><email>saprykina.aa@doclinika.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1451-7716</contrib-id><name-alternatives><name xml:lang="en"><surname>Kryshen’</surname><given-names>Kirill L.</given-names></name><name xml:lang="ru"><surname>Крышень</surname><given-names>Кирилл Леонидович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Head of the Department of Specific Toxicology and Microbiology </p></bio><bio xml:lang="ru"><p>канд. биол. наук, руководитель отдела специфической токсикологии и микробиологии </p></bio><email>kryshen.kl@doclinika.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9978-222X</contrib-id><name-alternatives><name xml:lang="en"><surname>Apolokhov</surname><given-names>Vasiliy D.</given-names></name><name xml:lang="ru"><surname>Аполохов</surname><given-names>Василий Даниилович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Researcher</p></bio><bio xml:lang="ru"><p>научный сотрудник </p></bio><email>apolohov_vd@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6232-7512</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernavtseva</surname><given-names>Anastasiya D.</given-names></name><name xml:lang="ru"><surname>Чернавцева</surname><given-names>Анастасия Дмитриевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Virologist of the department of preclinical studies and diagnostic drugs </p></bio><bio xml:lang="ru"><p>вирусолог отдела доклинических исследований и диагностических препаратов </p></bio><email>chernavtseva_ad@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3200-763X</contrib-id><name-alternatives><name xml:lang="en"><surname>Kovpak</surname><given-names>Anastasiya A.</given-names></name><name xml:lang="ru"><surname>Ковпак</surname><given-names>Анастасия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of the group of purification processes and formulation of finished dosage forms </p></bio><bio xml:lang="ru"><p>руководитель группы процессов очистки и формуляции готовых лекарственных форм </p></bio><email>kovpak_aa@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0995-7944</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivin</surname><given-names>Yuriy Yu.</given-names></name><name xml:lang="ru"><surname>Ивин</surname><given-names>Юрий Юрьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of the Department for Development and Implementation of Innovative and Semi-Industrial Technologies </p></bio><bio xml:lang="ru"><p>канд. биол. наук, начальник управления разработки и внедрения инновационных и полупромышленных технологий </p></bio><email>ivin_uu@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5381-2393</contrib-id><name-alternatives><name xml:lang="en"><surname>Piniaeva</surname><given-names>Anastasia N.</given-names></name><name xml:lang="ru"><surname>Пиняева</surname><given-names>Анастасия Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Chief technologist </p></bio><bio xml:lang="ru"><p>канд. биол. наук, главный технолог </p></bio><email>pinyaeva_an@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3176-6386</contrib-id><name-alternatives><name xml:lang="en"><surname>Makarova</surname><given-names>Marina N.</given-names></name><name xml:lang="ru"><surname>Макарова</surname><given-names>Марина Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Director </p></bio><bio xml:lang="ru"><p>д-р мед. наук, директор</p></bio><email>makarova.mn@doclinika.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2447-7888</contrib-id><name-alternatives><name xml:lang="en"><surname>Makarov</surname><given-names>Valery G.</given-names></name><name xml:lang="ru"><surname>Макаров</surname><given-names>Валерий Геннадьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Scientific supervisor </p></bio><bio xml:lang="ru"><p>д-р мед. наук, научный руководитель </p></bio><email>makarov.vg@doclinika.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6130-4145</contrib-id><name-alternatives><name xml:lang="en"><surname>Ishmukhametov</surname><given-names>Aidar A.</given-names></name><name xml:lang="ru"><surname>Ишмухаметов</surname><given-names>Айдар Айратович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Prof., Academician of the Russian Academy of Sciences,General manager </p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., акад. РАН, генеральный директор </p></bio><email>ishmukhametov@chumakovs.su</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences (Institute of Poliomyelitis), Village of Institute of Poliomyelitis</institution></aff><aff><institution xml:lang="ru">ФГАНУ «Федеральный научный центр исследований и разработки иммунобиологических препаратов имени М.П. Чумакова РАН» (Институт полиомиелита)</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research-and-manufacturing company «HOME OF PHARMACY» Joint Stock company</institution></aff><aff><institution xml:lang="ru">АО «НПО «ДОМ ФАРМАЦИИ»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-04-30" publication-format="electronic"><day>30</day><month>04</month><year>2025</year></pub-date><volume>70</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>177</fpage><lpage>188</lpage><history><date date-type="received" iso-8601-date="2025-03-14"><day>14</day><month>03</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Siniugina A.A., Lycheva N.A., Saprykina A.A., Kryshen’ K.L., Apolokhov V.D., Chernavtseva A.D., Kovpak A.A., Ivin Y.Y., Piniaeva A.N., Makarova M.N., Makarov V.G., Ishmukhametov A.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Синюгина А.А., Лычева Н.А., Сапрыкина А.А., Крышень К.Л., Аполохов В.Д., Чернавцева А.Д., Ковпак А.А., Ивин Ю.Ю., Пиняева А.Н., Макарова М.Н., Макаров В.Г., Ишмухаметов А.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Siniugina A.A., Lycheva N.A., Saprykina A.A., Kryshen’ K.L., Apolokhov V.D., Chernavtseva A.D., Kovpak A.A., Ivin Y.Y., Piniaeva A.N., Makarova M.N., Makarov V.G., Ishmukhametov A.A.</copyright-holder><copyright-holder xml:lang="ru">Синюгина А.А., Лычева Н.А., Сапрыкина А.А., Крышень К.Л., Аполохов В.Д., Чернавцева А.Д., Ковпак А.А., Ивин Ю.Ю., Пиняева А.Н., Макарова М.Н., Макаров В.Г., Ишмухаметов 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://virusjour.crie.ru/jour/article/view/16728">https://virusjour.crie.ru/jour/article/view/16728</self-uri><abstract xml:lang="en"><p><bold>Introduction. </bold>The prevalence of new coronavirus infection (COVID-19) in 2021-2022 in the pediatric population was 9.5%, and fatal outcomes began to be recorded. In 2022–2023, the proportion of children infected with COVID-19 increased to 18%. Developing a vaccine for the pediatric population is an urgent task.</p> <p><bold>The aim</bold> of the study is to explore the effect of the vaccine on the parameters of general and biochemical blood tests in immature rats.</p> <p><bold>Materials and methods.</bold> The study was performed on 112 immature rats (60 females, 52 males) of the Wistar line. Animals were randomized into groups that received the CoviVac vaccine at doses of 0.125, 0.25 and 0.5 mL/animal or placebo (0.5 mL/animal), intramuscularly on days 1, 15, 29 and 43 of the experiment. General and biochemical blood tests were performed twice, on the 57th and 71st days.</p> <p><bold>Results. </bold>Oligocythemia (0.25 and 0.5 mL/animal, <italic>p</italic> &lt; 0.05), leukocytosis and thrombocytopenia (0.5 mL/animal, <italic>p</italic> &lt; 0.05) were recorded in males. Monocytopenia (0.5 mL/animal, <italic>p </italic>&lt; 0.05) and leukopenia (0.25 mL/animal, <italic>p</italic> &lt; 0.05) were established in females. In males, an increase in the amount of globulins and total protein (0.5 mL/animal), a decrease in the A/G ratio (doses 0.25 and 0.5 mL/animal), a decrease in the cholesterol level (0.125 mL/animal) were detected. In females, an increase in the amount of albumin and total protein (0.5 mL/animal, <italic>p</italic> &lt; 0.05), a decrease in the level of triglycerides (0.125, 0.25, 0.5 mL/animal, placebo, <italic>p</italic> &lt; 0.05), a decrease in the level of lactate dehydrogenase, triglycerides and urea (0.25 mL/animal, <italic>p</italic> &lt; 0.05) were recorded.</p> <p><bold>Conclusion. </bold>The safety of the CociVac vaccine in relation to clinical and biochemical blood parameters has been demonstrated.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение. </bold>С 2021<bold> </bold>по 2022 г. распространение новой коронавирусной инфекции (COVID-19) в детской популяции составляло 9,5%, регистрировались летальные исходы. В 2022–2023 гг. доля детей, заразившихся COVID-19, выросла до 18%. Таким образом, разработка вакцины для педиатрической популяции является актуальной задачей. Необходимо отметить общую недостаточность публикаций результатов исследований безопасности, выполненных на доклиническом этапе.</p> <p><bold>Цель исследования </bold>– изучение влияния вакцины против COVID-19 на параметры общего и биохимического анализа крови у неполовозрелых крыс.</p> <p><bold>Материалы и методы.</bold> Исследование выполнено на 112 неполовозрелых крысах (60 самок, 52 самца) линии Wistar. Животных рандомизировали на группы, получившие вакцину «КовиВак» в дозах 0,125, 0,25 и 0,5 мл/животное или плацебо в объеме 0,5 мл/животное, 4-кратно внутримышечно в 1, 15, 29 и 43-й дни эксперимента, начиная с 3-го дня от рождения животного. В ходе исследования дважды (на 57-й и 71-й дни) проводили общий и биохимический анализы крови.</p> <p><bold>Результаты.</bold> У самцов зарегистрировали олигоцитемию (0,25 и 0,5 мл/животное, <italic>р</italic> &lt; 0,05), лейкоцитоз и тромбоцитопению (0,5 мл/животное, <italic>р</italic> &lt; 0,05). У самок установили моноцитопению (0,5 мл/животное, <italic>р</italic> &lt; 0,05) и лейкоцитопению (0,25 мл/животное, <italic>р </italic>&lt; 0,05). У самцов выявили увеличение количества глобулинов и общего белка (0,5 мл/животное), снижение соотношения А/G (0,25 и 0,5 мл/животное), снижение уровня холестерина (0,125 мл/животное). У самок зафиксировали увеличение количества альбумина и общего белка (0,5 мл/животное, <italic>р</italic> &lt; 0,05), снижение уровня триглицеридов (0,125, 0,25, 0,5 мл/животное, плацебо, <italic>р </italic>&lt; 0,05), снижение уровня триглицеридов и мочевины (0,25 мл/животное, <italic>р</italic> &lt; 0,05).</p> <p><bold>Заключение.</bold> Все зарегистрированные значения находились в пределах внутрилабораторных норм. Таким образом, показана безопасность вакцины «КовиВак» в отношении клинических и биохимических параметров крови.</p></trans-abstract><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>new coronavirus infection</kwd><kwd>safety</kwd><kwd>vaccine</kwd><kwd>CociVac</kwd><kwd>immature rats</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>новая коронавирусная инфекция</kwd><kwd>безопасность</kwd><kwd>вакцина</kwd><kwd>КовиВак</kwd><kwd>неполовозрелые крысы</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Musaelyan O.A. Features of the course and inflammatory markers in children with coronavirus infection COVID-19: Diss. Stavropol’; 2024. (in Russian)</mixed-citation><mixed-citation xml:lang="ru">Мусаелян О.А. Особенности течения и воспалительные маркеры у детей с коронавирусной инфекцией COVID-19: Автореф. дисс. ... канд. мед. наук. 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