<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">Pediatric Hematology/Oncology and Immunopathology</journal-id><journal-title-group><journal-title xml:lang="en">Pediatric Hematology/Oncology and Immunopathology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы гематологии/онкологии и иммунопатологии в педиатрии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-1708</issn><issn publication-format="electronic">2414-9314</issn><publisher><publisher-name xml:lang="en">Fund Doctors, Innovations, Science for Children</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">615</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2022-21-2-54-60</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">Humoral and T cell immune responses over time following SARS-CoV-2 vaccination</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование гуморального и Т-клеточного иммунных ответов в динамике после вакцинации от SARS-CoV-2</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1680-7269</contrib-id><name-alternatives><name xml:lang="en"><surname>Solopova</surname><given-names>G. G.</given-names></name><name xml:lang="ru"><surname>Солопова</surname><given-names>Г. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Osipova</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Осипова</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Elena Yu. Osipova</bold>, Head of the Laboratory of Physiology and Pathology of Stem Cells</p><p>1 Samory Mashela St., Moscow 117997</p></bio><bio xml:lang="ru"><p><bold>Осипова Елена Юрьевна</bold>, заведующая лабораторией физиологии и патологии стволовых клеток</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>e_ossipova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Efimenko</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Ефименко</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikolaev</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Николаев</surname><given-names>Р. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9736-1712</contrib-id><name-alternatives><name xml:lang="en"><surname>Begunova</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Бегунова</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tverdysheva</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Твердышева</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр детской гематологии, онкологии и иммунологии им. Дмитрия Рогачева» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-07-08" publication-format="electronic"><day>08</day><month>07</month><year>2022</year></pub-date><volume>21</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>54</fpage><lpage>60</lpage><history><date date-type="received" iso-8601-date="2022-06-23"><day>23</day><month>06</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-06-23"><day>23</day><month>06</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">«D. Rogachev NMRCPHOI»</copyright-holder><copyright-holder xml:lang="ru">ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</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://hemoncim.com/jour/article/view/615">https://hemoncim.com/jour/article/view/615</self-uri><abstract xml:lang="en"><p>   In this study, we explored the development and durability of humoral and T cell immune responses among the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology staff members after vaccination with Sputnik V vaccine during the rapid spread of the novel coronavirus disease (COVID-19). The study was approved by the Independent Ethics Committee and the Scientific Council of the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology. Three weeks after the first dose of Sputnik V vaccine, anti-spike antibodies were detected in 78.0% of the study subjects. Three weeks after the second dose, anti-spike antibodies were found in 98.4% of the subjects. Three months later, the percentage of the study subjects with anti-spike antibodies fell to 82.7 %. At first, the median antibody level increased from 198.0 BAU/mL (prior to the second vaccination) to 1050.0 BAU/mL (3 weeks after the second dose of the vaccine) but then decreased to 710.7 BAU/mL by 3 months after the full vaccination. Six months after the full vaccination, spike-specific antibodies were detectable in 82.5 % of the studied samples; the median antibody level dropped significantly (to 253.0 BAU/mL). The majority of the study subjects had SARS-CoV-2-specific T cells. They were detected in 71.9 %, 73.9 % and 67.4 % of the subjects at 3 weeks, 3 months and 6 months after the completion of the vaccination course, respectively. The level of S-specific T cells reached a peak at 3 weeks after the vaccination and was found to decline at later time points. Thus, 6 months after the vaccination with Sputnik V, we observed a reduction in both humoral and T cell-mediated immune responses, and this should be taken into consideration when implementing COVID-19 infection prevention and control measures among the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology staff members.</p></abstract><trans-abstract xml:lang="ru"><p>   В работе исследованы динамика формирования и продолжительность гуморального и Т-клеточного иммунных ответов к SARS-CoV-2 у сотрудников НМИЦ ДГОИ им. Дмитрия Рогачева после вакцинации препаратом Спутник V в период интенсивного распространения новой коронавирусной инфекции (COVID-19). Данное исследование одобрено независимым этическим комитетом и утверждено решением ученого совета НМИЦ ДГОИ им. Дмитрия Рогачева. Через 3 нед после первой дозы вакцины антитела к spike-белку вируса выработались у 78,0 % испытуемых. Через 3 нед после второй дозы этот показатель увеличился до 98,4 % и снизился через 3 мес до 82,7 %. Медиана количества антител возрастала с 198,0 BAU/мл (перед второй вакцинацией) до 1050,0 BAU/мл (через 3 нед после второй дозы вакцины), а затем снижалась до 710,7 BAU/мл к 3-му месяцу после завершения вакцинации. Через 6 мес доля позитивных по антителам образцов составила 82,5 %, медиана количества антител значительно снизилась – до 253,0 BAU/мл. У большинства участников исследования было выявлено наличие специфических Т-лимфоцитов против SARS-CoV-2: у 71,9 %, 73,9 % и 67,4 % при сроках 3 нед, 3 мес и 6 мес после завершения вакцинации соответственно. Количество S-специфичных Т-лимфоцитов было максимальным через 3 нед после вакцинации и снижалось к последующим срокам исследования. Таким образом, через 6 мес после вакцинации Спутником V наблюдается снижение как гуморального, так и Т-клеточного ответа, что должно учитываться в плане противоэпидемических мероприятий среди сотрудников НМИЦ ДГОИ им. Дмитрия Рогачева.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ELISPOT</kwd><kwd>SARS-Cov-2</kwd><kwd>Т cells</kwd><kwd>antibodies</kwd><kwd>vaccination</kwd><kwd>immunity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ELISPOT</kwd><kwd>SARS-Cov-2</kwd><kwd>Т-лимфоциты</kwd><kwd>антитела</kwd><kwd>вакцинация</kwd><kwd>иммунитет</kwd></kwd-group><funding-group><funding-statement xml:lang="en">Not specified</funding-statement><funding-statement xml:lang="ru">Не указан</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">1. Hui D. S. I., Azhar E., Madani T. A., Ntoumi F., Kock R., Dar O., et al. The Continuing 2019-nCoV epidemic threat of novel coronaviruses to global health-The latest 2019 novel coronavirus outbreak in Wuhan, China. Int J Infect Dis 2020; 14: 264–6.</mixed-citation><mixed-citation xml:lang="ru">Hui D. S. I., Azhar E., Madani T. A., Ntoumi F., Kock R., Dar O., et al. The Continuing 2019-nCoV epidemic threat of novel coronaviruses to global health-The latest 2019 novel coronavirus outbreak in Wuhan, China. Int J Infect Dis 2020; 14: 264–6.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">2. Vabret N., Britton G. J., Gruber C., Hegde S., Kim J., Kuksin M., et al. Immunology review, immunology of COVID-19: current state of the science. Immunity 2020; 52: 910–41.</mixed-citation><mixed-citation xml:lang="ru">Vabret N., Britton G. J., Gruber C., Hegde S., Kim J., Kuksin M., et al. Immunology review, immunology of COVID-19: current state of the science. Immunity 2020; 52: 910–41.</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">3. Потеряев Д. А. Перспективы использования технологической платформы ELIS-POT в системе противоэпидемических мероприятий против новой коронавирусной инфекции COVID-19 / Д. А. Потеряев [и др.] // БИОпрепараты. Профилактика, диагностика, лечение. – 2020. – 20 (3): 146–58.</mixed-citation><mixed-citation xml:lang="ru">Потеряев Д. А. Перспективы использования технологической платформы ELIS-POT в системе противоэпидемических мероприятий против новой коронавирусной инфекции COVID-19 / Д. А. Потеряев [и др.] // БИОпрепараты. Профилактика, диагностика, лечение. – 2020. – 20 (3): 146–58.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">4. Saletti G., Cuburu N., Yang J. S., Dey A., Czerkinsky C. Enzyme-linked immunospot assays for direct ex vivo measurement of vaccineinduced human humoral immune responses in blood. Nat Protoc 2013; 8 (6): 1073–87.</mixed-citation><mixed-citation xml:lang="ru">Saletti G., Cuburu N., Yang J. S., Dey A., Czerkinsky C. Enzyme-linked immunospot assays for direct ex vivo measurement of vaccineinduced human humoral immune responses in blood. Nat Protoc 2013; 8 (6): 1073–87.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">5. Kozlowski P. A., Cu-Uvin S., Neutra M. R., Flanigan T. P. Comparison of the oral, rectal, and vaginal immunization routes for induction of antibodies inrectal and genital tract secretions of women. Infect Immun 1997; 65 (4): 1387–94.</mixed-citation><mixed-citation xml:lang="ru">Kozlowski P. A., Cu-Uvin S., Neutra M. R., Flanigan T. P. Comparison of the oral, rectal, and vaginal immunization routes for induction of antibodies inrectal and genital tract secretions of women. Infect Immun 1997; 65 (4): 1387–94.</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">6. Gu J., Gong E., Zhang B., Zheng J., Gao Z., Zhong Y., et al. Multiple organ infection and the pathogenesis of SARS. J Exp Med 2005; 202 (3): 415–24.</mixed-citation><mixed-citation xml:lang="ru">Gu J., Gong E., Zhang B., Zheng J., Gao Z., Zhong Y., et al. Multiple organ infection and the pathogenesis of SARS. J Exp Med 2005; 202 (3): 415–24.</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><citation-alternatives><mixed-citation xml:lang="en">7. Weiskopf D., Schmitz K. S., Raadsen M. P., Grifoni A., Okba N. M. A., Endeman H., et al. Phenotype and kinetics of SARS-CoV-2-specific T cells in COVID-19 patients with acute respiratory distress syndrome. Sci Immunol 2020; 5 (48): 2062–71.</mixed-citation><mixed-citation xml:lang="ru">Weiskopf D., Schmitz K. S., Raadsen M. P., Grifoni A., Okba N. M. A., Endeman H., et al. Phenotype and kinetics of SARS-CoV-2-specific T cells in COVID-19 patients with acute respiratory distress syndrome. Sci Immunol 2020; 5 (48): 2062–71.</mixed-citation></citation-alternatives></ref><ref id="B8"><label>8.</label><citation-alternatives><mixed-citation xml:lang="en">8. Grifoni A., Weiskopf D., Ramirez S. I., Mateus J., Dan J. M., Moderbacher C. R., et al. Targets of T cell responses to SARS-CoV-2 coronavirus in humans with COVID-19 disease and unexposed individuals. Cell 2020; 181 (7): 1489–501.</mixed-citation><mixed-citation xml:lang="ru">Grifoni A., Weiskopf D., Ramirez S. I., Mateus J., Dan J. M., Moderbacher C. R., et al. Targets of T cell responses to SARS-CoV-2 coronavirus in humans with COVID-19 disease and unexposed individuals. Cell 2020; 181 (7): 1489–501.</mixed-citation></citation-alternatives></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">9. Lehmann P. V., Zhang W. Unique strengths of ELISPOT for T cell diagnostics. Methods Mol Biol 2012; 792: 3–23.</mixed-citation><mixed-citation xml:lang="ru">Lehmann P. V., Zhang W. Unique strengths of ELISPOT for T cell diagnostics. Methods Mol Biol 2012; 792: 3–23.</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">10. Braun J., Loyal L., Frentsch M., Wendisch D., Georg P., Kurth F., et al. Presence of SARS-CoV-2 reactive T cells in COVID-19 patients and healthy donors. Nature 2020; 587: 270–4.</mixed-citation><mixed-citation xml:lang="ru">Braun J., Loyal L., Frentsch M., Wendisch D., Georg P., Kurth F., et al. Presence of SARS-CoV-2 reactive T cells in COVID-19 patients and healthy donors. Nature 2020; 587: 270–4.</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">11. Shomuradova A. S., Vagida M. S., Sheetikov S. A., Zornikova K. V., Kiryukhin D., Titov A., et al. SARS-CoV-2 epitopes are recognized by a public and diverse repertoire of human T-cell receptors. Immunity 2020; 53 (6): 1245–57.</mixed-citation><mixed-citation xml:lang="ru">Shomuradova A. S., Vagida M. S., Sheetikov S. A., Zornikova K. V., Kiryukhin D., Titov A., et al. SARS-CoV-2 epitopes are recognized by a public and diverse repertoire of human T-cell receptors. Immunity 2020; 53 (6): 1245–57.</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">12. Dong C., Ni L., Ye F., Chen M. L., Feng Y., Deng Y. Q., et al. Characterization of anti-viral immunity in recovered individuals infected by SARS-CoV-2. [Электронный ресурс] URL: https://www.medrxiv.org/content/10.1101/2020.03.17.20036640v1</mixed-citation><mixed-citation xml:lang="ru">Dong C., Ni L., Ye F., Chen M. L., Feng Y., Deng Y. Q., et al. Characterization of anti-viral immunity in recovered individuals infected by SARS-CoV-2. [Электронный ресурс] URL: https://www.medrxiv.org/content/10.1101/2020.03.17.20036640v1</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><citation-alternatives><mixed-citation xml:lang="en">13. Sundling C., Rennberg C., Yman V., Asghar M., Jahnmatz P., Lakshmikanth T., et al. B cell profiling in malaria reveals expansion and remodelling of CD11c+ B cell subsets. JCI Insight 2019; 4 (9): 1–16.</mixed-citation><mixed-citation xml:lang="ru">Sundling C., Rennberg C., Yman V., Asghar M., Jahnmatz P., Lakshmikanth T., et al. B cell profiling in malaria reveals expansion and remodelling of CD11c+ B cell subsets. JCI Insight 2019; 4 (9): 1–16.</mixed-citation></citation-alternatives></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">14. Byazrova M., Yusubalieva G., Spiridonova A., Efimov G., Mazurov D., Baranov K., et al. Pattern of circulating SARS-CoV-2-specific antibody-secreting and memory B-cell generation in patients with acute COVID-19. Clin Transl Immunology 2021; 10 (2): 1245–61.</mixed-citation><mixed-citation xml:lang="ru">Byazrova M., Yusubalieva G., Spiridonova A., Efimov G., Mazurov D., Baranov K., et al. Pattern of circulating SARS-CoV-2-specific antibody-secreting and memory B-cell generation in patients with acute COVID-19. Clin Transl Immunology 2021; 10 (2): 1245–61.</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">15. Wang Y. D., Fion Sin W., Xu G. B., Yang H. H., Wong T. Y., Pang X. W., et al. T-cell epitopes in severe acute respiratory syndrome (SARS) coronavirus spike protein elicit a specific T-cell immune response in patients who recover from SARS. J Virol 2004; 78 (11): 5612–8.</mixed-citation><mixed-citation xml:lang="ru">Wang Y. D., Fion Sin W., Xu G. B., Yang H. H., Wong T. Y., Pang X. W., et al. T-cell epitopes in severe acute respiratory syndrome (SARS) coronavirus spike protein elicit a specific T-cell immune response in patients who recover from SARS. J Virol 2004; 78 (11): 5612–8.</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">16. Sekine T., Perez-Potti A., Rivera-Ballesteros O., Strаlin K, Gorin J. B., Olsson A., et al. Robust T cell immunity in convalescent individuals with asymptomatic or mild COVID-19. Cell 2020; 183 (1): 158–68.</mixed-citation><mixed-citation xml:lang="ru">Sekine T., Perez-Potti A., Rivera-Ballesteros O., Strаlin K, Gorin J. B., Olsson A., et al. Robust T cell immunity in convalescent individuals with asymptomatic or mild COVID-19. Cell 2020; 183 (1): 158–68.</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">17. Pia L. SARS-CoV-2-reactive T cells in patients and healthy donors. Nat Rev Immunol 2020; 20 (6): 353–9.</mixed-citation><mixed-citation xml:lang="ru">Pia L. SARS-CoV-2-reactive T cells in patients and healthy donors. Nat Rev Immunol 2020; 20 (6): 353–9.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><citation-alternatives><mixed-citation xml:lang="en">18. Kissler S. M., Tedijanto C., Goldstein E., Grad Y. H., Lipsitch M. Projecting the transmission dynamics of SARS-CoV-2 through the postpandemic period. Science 2020; 368 (6493): 860–8.</mixed-citation><mixed-citation xml:lang="ru">Kissler S. M., Tedijanto C., Goldstein E., Grad Y. H., Lipsitch M. Projecting the transmission dynamics of SARS-CoV-2 through the postpandemic period. Science 2020; 368 (6493): 860–8.</mixed-citation></citation-alternatives></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">19. Melgaco J. G., Azamor T., Ano Bom A. P. D. Protective immunity after COVID-19 has been questioned: what can we do without SARS-CoV-2-IgG detection? Cell Immunol 2020; 353: 104–14.</mixed-citation><mixed-citation xml:lang="ru">Melgaco J. G., Azamor T., Ano Bom A. P. D. Protective immunity after COVID-19 has been questioned: what can we do without SARS-CoV-2-IgG detection? Cell Immunol 2020; 353: 104–14.</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">20. Попова А. Ю. Популяционный иммунитет к SARS-CoV-2 среди населения Санкт-Петербурга в период эпидемии COVID-19 / А. Ю. Попова [и др.] // Проблемы особо опасных инфекций. – 2020. – 3: 124–30.</mixed-citation><mixed-citation xml:lang="ru">Попова А. Ю. Популяционный иммунитет к SARS-CoV-2 среди населения Санкт-Петербурга в период эпидемии COVID-19 / А. Ю. Попова [и др.] // Проблемы особо опасных инфекций. – 2020. – 3: 124–30.</mixed-citation></citation-alternatives></ref></ref-list></back></article>
