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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">docru</journal-id><journal-title-group><journal-title xml:lang="ru">Доктор.Ру</journal-title><trans-title-group xml:lang="en"><trans-title>Title</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1727-2378</issn><issn pub-type="epub">2713-2994</issn><publisher><publisher-name>ООО "ГК "РУСМЕДИКАЛ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31550/17272378-2024-23-1-15-20</article-id><article-id custom-type="elpub" pub-id-type="custom">docru-5</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Оценка связи синдрома усталости с уровнями ключевых маркеров воспаления и различными медицинскими вмешательствами у пациентов  с long-COVID и post-COVID</article-title><trans-title-group xml:lang="en"><trans-title>Evaluation of the Association of Fatigue Syndrome   with Levels of Key Inflammatory Markers and Various Medical Interventions in Long-COVID and Post-COVID Patients</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-3144-3143</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колесников</surname><given-names>П. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesnikov</surname><given-names>P. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колесников Павел Евгеньевич — аспирант кафедры фтизиопульмонологии</p><p>420012, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49 Butlerov Str., Kazan, 420012</p></bio><email xlink:type="simple">poulk17@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5028-5276</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Визель</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vizel</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Визель Александр Андреевич — д. м. н., профессор, заведующий кафедрой фтизиопульмонологии </p><p>420012, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49 Butlerov Str., Kazan, 420012</p></bio><email xlink:type="simple">lordara@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6584-6803</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абашев</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Abashev</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абашев Альмир Рашидович — к. м. н., доцент, первый заместитель министра здравоохранения Республики Татарстан</p><p>420012,г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>40/11 Butlerov Str., Kazan, 420012</p></bio><email xlink:type="simple">Almir.Abashev@tatar.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Казанский государственный медицинский университет» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Министерство здравоохранения Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ministry of Health of the Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>12</day><month>02</month><year>2025</year></pub-date><volume>23</volume><issue>1</issue><issue-title>ТЕРАПИЯ</issue-title><fpage>15</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Колесников П.Е., Визель А.А., Абашев А.Р., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Колесников П.Е., Визель А.А., Абашев А.Р.</copyright-holder><copyright-holder xml:lang="en">Kolesnikov P.E., Vizel A.A., Abashev A.R.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://docru.elpub.ru/jour/article/view/5">https://docru.elpub.ru/jour/article/view/5</self-uri><abstract><sec><title>Цель исследования</title><p>Цель исследования. Используя специализированную шкалу оценки усталости, выявить факторы риска формирования синдрома усталости у пациентов, перенесших стационарное лечение в связи с поражением легких, вызванным COVID-19, на разных периодах наблюдения — при long-COVID и post-COVID.</p></sec><sec><title>Дизайн</title><p>Дизайн. Ретроспективное наблюдательное исследование.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование включены 100 пациентов — 60 женщин и 40 мужчин в возрасте от 25 до 84 лет, Me — 58 (50–64) лет, перенесших стационарное лечение в связи с поражением легких, вызванным ПЦР-подтвержденной новой коронавирусной инфекцией COVID-19. Усталость выявлена у 66% из них. В зависимости от срока после выписки из стационара пациенты были разделены на группы long-COVID (до 12 недель включительно) и post-COVID (более 12 недель). Усталость оценивалась при помощи валидизированной шкалы Fatigue Assessment Scale (FAS). При количестве баллов 21 и более усталость считается клинически значимой. В качестве возможных предикторов усталости рассматривались ключевые воспалительные маркеры (ферритин, С-реактивный белок, нейтрофильно-лимфоцитарное соотношение, скорость оседания эритроцитов) и различные медицинские вмешательства (вакцинация, перевод в отделение реанимации и интенсивной терапии, применение этиотропной и антикоагулянтной терапии на амбулаторном этапе), данные о которых взяты из медицинской документации.</p></sec><sec><title>Результаты</title><p>Результаты. Ключевые воспалительные маркеры, ассоциированные с тяжестью острой фазы COVID-19, имеют разную прогностическую ценность при оценке усталости. Статистически значимая связь выявлена между синдромом усталости, оцененным по шкале FAS, и нейтрофильно-лимфоцитарным соотношением при поступлении в стационар (p = 0,042), скоростью оседания эритроцитов при выписке (p = 0,013), уровнем ферритина при выписке (p = 0,021), тогда как подобная связь между баллом по шкале FAS и уровнем С-реактивного белка не найдена ни при госпитализации (p = 0,775), ни при выписке из стационара (p = 0,272). Различные медицинские вмешательства также связаны с формированием синдрома усталости. Пациенты, перенесшие госпитализацию в отделение реанимации и интенсивной терапии, значимо чаще отмечали синдром усталости (р = 0,044, для периода long-COVID, p = 0,006), значимым был протекторный эффект вакцинации (р = 0,002, для post-COVID p = 0,009). Не выявлена связь между синдромом усталости и амбулаторным применением этиотропной терапии (p = 0,459) или антикоагулянтов (p = 0,358).</p></sec><sec><title>Заключение</title><p>Заключение. Синдром усталости после перенесенной новой коронавирусной инфекции COVID-19 с поражением легких связан с особенностями проводимой терапии и уровнями некоторых лабораторных маркеров во время острой фазы инфекции</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. Using a specialized fatigue rating scale, to identify risk factors for fatigue syndrome formation in patients hospitalized for COVID-19-induced lung damage at different follow-up periods — at long-COVID and post-COVID.</p></sec><sec><title>Design</title><p>Design. A retrospective observational study.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study included 100 patients — 60 women and 40 men aged 25 to 84 years, Me — 58 (50–64) years, who underwent hospitalization for lung lesions caused by PCR-confirmed COVID-19 infection. Fatigue was detected in 66% of them. Patients were divided into long-COVID (up to 12 weeks) and post-COVID (more than 12 weeks) groups according to the time period after hospital discharge. Fatigue was assessed using the validated Fatigue Assessment Scale (FAS). With a score of 21 or more, fatigue was considered clinically significant. Key inflammatory markers (ferritin, C-reactive protein, neutrophil-lymphocyte ratio, erythrocyte sedimentation rate) and various medical interventions (vaccination, transfer to the intensive care unit, use of etiotropic and anticoagulant therapy at the outpatient stage) were considered as possible predictors of fatigue, the data on which were taken from medical records.</p></sec><sec><title>Results</title><p>Results. Key inflammatory markers associated with the severity of acute COVID-19 have different prognostic value in the assessment of fatigue. A statistically significant association was found between fatigue syndrome as assessed by FAS and neutrophil-lymphocyte ratio at hospital admission (p = 0.042), erythrocyte sedimentation rate at discharge (p = 0.013), ferritin level at discharge (p = 0.021), whereas a similar association between FAS score and CRP level was not found either at hospital admission (p = 0.775) or at hospital discharge (p = 0.272). Various medical interventions were also associated with the formation of fatigue syndrome. Patients who underwent hospitalization in the intensive care unit were significantly more likely to report fatigue syndrome (p = 0.044, for the long-COVID period p = 0.006), the protective effect of vaccination was significant (p = 0.002, for post-COVID p = 0.009). No association was found between fatigue syndrome and outpatient use of etiotropic therapy (p = 0.459) or anticoagulants (p = 0.358).</p></sec><sec><title>Conclusion</title><p>Conclusion. Fatigue syndrome after a COVID-19 with lung lesions is associated with the features of the therapy administered and the levels of some laboratory markers during the acute phase of infection.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>новая коронавирусная инфекция COVID-19</kwd><kwd>long-COVID</kwd><kwd>post-COVID</kwd><kwd>усталость</kwd><kwd>шкала оценки усталости Fatigue Assessment Scale</kwd><kwd>маркеры воспаления</kwd></kwd-group><kwd-group xml:lang="en"><kwd>COVID-19 coronavirus infection</kwd><kwd>long-COVID</kwd><kwd>post-COVID</kwd><kwd>fatigue</kwd><kwd>Fatigue Assessment Scale</kwd><kwd>inflammatory markers</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Shah W., Hillman T., Playford E.D., Hishmeh L. Managing the long term effects of COVID-19: summary of NICE, SIGN, and RCGP rapid guideline. BMJ. 2021;372:n136. DOI: 10.1136/bmj.n136</mixed-citation><mixed-citation xml:lang="en">Shah W., Hillman T., Playford E.D., Hishmeh L. Managing the long term effects of COVID-19: summary of NICE, SIGN, and RCGP rapid guideline. BMJ. 2021;372:n136. DOI: 10.1136/bmj.n136</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Augustin M., Schommers P., Stecher M., Dewald F. et al. Post-COVID syndrome in non-hospitalised patients with COVID-19: a longitudinal prospective cohort study. Lancet Reg. Health Eur. 2021;6:100122. DOI: 10.1016/j.lanepe.2021.100122</mixed-citation><mixed-citation xml:lang="en">Augustin M., Schommers P., Stecher M., Dewald F. et al. Post-COVID syndrome in non-hospitalised patients with COVID-19: a longitudinal prospective cohort study. Lancet Reg. Health Eur. 2021;6:100122. DOI: 10.1016/j.lanepe.2021.100122</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Goërtz Y.M.J., Van Herck M., Delbressine J.M., Vaes A.W. et al. Persistent symptoms 3 months after a SARS-CoV-2 infection: the post-COVID-19 syndrome? ERJ Open Res. 2020;6(4):00542–2020. DOI: 10.1183/23120541.00542-2020</mixed-citation><mixed-citation xml:lang="en">Goërtz Y.M.J., Van Herck M., Delbressine J.M., Vaes A.W. et al. Persistent symptoms 3 months after a SARS-CoV-2 infection: the post-COVID-19 syndrome? ERJ Open Res. 2020;6(4):00542–2020. DOI: 10.1183/23120541.00542-2020</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Drent M., Lower E.E., De Vries J. Sarcoidosis-associated fatigue. Eur. Respir. J. 2012;40(1):255–63. DOI: 10.1183/09031936.00002512</mixed-citation><mixed-citation xml:lang="en">Drent M., Lower E.E., De Vries J. Sarcoidosis-associated fatigue. Eur. Respir. J. 2012;40(1):255–63. DOI: 10.1183/09031936.00002512</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Баврина А.П. Основные понятия статистики. Медицинский альманах. 2020;3(64):101–11.</mixed-citation><mixed-citation xml:lang="en">Bavrina A.P. Basic concepts of statistics. Medical Almanac. 2020;3(64):101–11. (in Russian)</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Phetsouphanh C., Darley., Wilson D.B., Howe A. et al. Immunological dysfunction persists for 8 months following initial mild-to-moderate SARS-CoV-2 infection. Nat. Immunol. 2022;23(2):210–16. DOI: 10.1038/s41590-021-01113-x</mixed-citation><mixed-citation xml:lang="en">Phetsouphanh C., Darley., Wilson D.B., Howe A. et al. Immunological dysfunction persists for 8 months following initial mild-to-moderate SARS-CoV-2 infection. Nat. Immunol. 2022;23(2):210–16. DOI: 10.1038/s41590-021-01113-x</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Lai Y.J., Liu S.H., Manachevakul S., Lee T.A. et al. Biomarkers in long COVID-19: a systematic review. Front. Med. 2023;10: 1085988. DOI: 10.3389/fmed.2023.1085988</mixed-citation><mixed-citation xml:lang="en">Lai Y.J., Liu S.H., Manachevakul S., Lee T.A. et al. Biomarkers in long COVID-19: a systematic review. Front. Med. 2023;10: 1085988. DOI: 10.3389/fmed.2023.1085988</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Yong S.J., Halim A., Halim M., Liu S. et al. Inflammatory and vascular biomarkers in post-COVID-19 syndrome: a systematic review and meta-analysis of over 20 biomarkers. Rev. Med. Virol. 2023;33(2):e2424. DOI: 10.1002/rmv.2424</mixed-citation><mixed-citation xml:lang="en">Yong S.J., Halim A., Halim M., Liu S. et al. Inflammatory and vascular biomarkers in post-COVID-19 syndrome: a systematic review and meta-analysis of over 20 biomarkers. Rev. Med. Virol. 2023;33(2):e2424. DOI: 10.1002/rmv.2424</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Marsán-Suárez V., Casado-Hernández I., Hernández-Ramos E., Díaz-Domínguez G. et al. Biomarkers of sequela in adult patients convalescing from COVID-19. Adv. Biomark. Sci. Technol. 2022;4: 36–53. DOI: 10.1016/j.abst.2022.10.001</mixed-citation><mixed-citation xml:lang="en">Marsán-Suárez V., Casado-Hernández I., Hernández-Ramos E., Díaz-Domínguez G. et al. Biomarkers of sequela in adult patients convalescing from COVID-19. Adv. Biomark. Sci. Technol. 2022;4: 36–53. DOI: 10.1016/j.abst.2022.10.001</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Maamar M., Artime A., Pariente E., Fierro P. et al. Post-COVID-19 syndrome, low-grade inflammation and inflammatory markers: a cross-sectional study. Curr. Med. Res. Opin. 2022;38(6):901–9. DOI: 10.1080/03007995.2022.2042991</mixed-citation><mixed-citation xml:lang="en">Maamar M., Artime A., Pariente E., Fierro P. et al. Post-COVID-19 syndrome, low-grade inflammation and inflammatory markers: a cross-sectional study. Curr. Med. Res. Opin. 2022;38(6):901–9. DOI: 10.1080/03007995.2022.2042991</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Mutinelli-Szymanski P., Hude I., Merle E., Lombardi Y. et al. Neutrophil:lymphocyte ratio predicts short-term outcome of COVID-19 in haemodialysis patients. Clin. Kidney J. 2020;14(1): 124–31. DOI: 10.1093/ckj/sfaa194</mixed-citation><mixed-citation xml:lang="en">Mutinelli-Szymanski P., Hude I., Merle E., Lombardi Y. et al. Neutrophil:lymphocyte ratio predicts short-term outcome of COVID-19 in haemodialysis patients. Clin. Kidney J. 2020;14(1): 124–31. DOI: 10.1093/ckj/sfaa194</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Halpin S., McIvor C., Whyatt G., Adams A. et al. Postdischarge symptoms and rehabilitation needs in survivors of COVID-19 infection: a cross-sectional evaluation. J. Med. Virol. 2020; 93(2):1013–22. DOI: 10.1002/jmv.26368</mixed-citation><mixed-citation xml:lang="en">Halpin S., McIvor C., Whyatt G., Adams A. et al. Postdischarge symptoms and rehabilitation needs in survivors of COVID-19 infection: a cross-sectional evaluation. J. Med. Virol. 2020; 93(2):1013–22. DOI: 10.1002/jmv.26368</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Taboada M., Cariñena A., Moreno E., Rodríguez N. et al. PostCOVID-19 functional status six-months after hospitalization. J. Infect. 2021;82(4):e31–3. DOI: 10.1016/j.jinf.2020.12.022</mixed-citation><mixed-citation xml:lang="en">Taboada M., Cariñena A., Moreno E., Rodríguez N. et al. PostCOVID-19 functional status six-months after hospitalization. J. Infect. 2021;82(4):e31–3. DOI: 10.1016/j.jinf.2020.12.022</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Romero-Rodríguez E., Pérula-de Torres L.Á., Castro-Jiménez R., González-Lama J. et al. Hospital admission and vaccination as predictive factors of long COVID-19 symptoms. Front. Med. 2022;9:1016013. DOI: 10.3389/fmed.2022.1016013</mixed-citation><mixed-citation xml:lang="en">Romero-Rodríguez E., Pérula-de Torres L.Á., Castro-Jiménez R., González-Lama J. et al. Hospital admission and vaccination as predictive factors of long COVID-19 symptoms. Front. Med. 2022;9:1016013. DOI: 10.3389/fmed.2022.1016013</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Simon M.A., Luginbuhl R.D., Parker R.H. Reduced incidence of LongCOVID symptoms related to administration of COVID-19 vaccines both before COVID-19 diagnosis and up to 12 weeks after. medRxiv. 2021;2021.11.17.21263608. DOI: 10.1101/2021.11.17.21263608</mixed-citation><mixed-citation xml:lang="en">Simon M.A., Luginbuhl R.D., Parker R.H. Reduced incidence of LongCOVID symptoms related to administration of COVID-19 vaccines both before COVID-19 diagnosis and up to 12 weeks after. medRxiv. 2021;2021.11.17.21263608. DOI: 10.1101/2021.11.17.21263608</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Antonelli M., Penfold R.S., Merino J., Sudre C.H. et al. Risk factors and disease profile of post-vaccination SARS-CoV-2 infection in UK users of the COVID Symptom Study app: a prospective, community-based, nested, case-control study. Lancet Infect. Dis. 2022;22(1):43–55. DOI: 10.1016/s1473-3099(21)00460-6</mixed-citation><mixed-citation xml:lang="en">Antonelli M., Penfold R.S., Merino J., Sudre C.H. et al. Risk factors and disease profile of post-vaccination SARS-CoV-2 infection in UK users of the COVID Symptom Study app: a prospective, community-based, nested, case-control study. Lancet Infect. Dis. 2022;22(1):43–55. DOI: 10.1016/s1473-3099(21)00460-6</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Taquet M., Dercon Q., Harrison P.J. Six-month sequelae of post-vaccination SARS-CoV-2 infection: a retrospective cohort study of 10,024 breakthrough infections. Brain Behav. Immun. 2022;103:154–62. DOI: 10.1016/j.bbi.2022.04.013</mixed-citation><mixed-citation xml:lang="en">Taquet M., Dercon Q., Harrison P.J. Six-month sequelae of post-vaccination SARS-CoV-2 infection: a retrospective cohort study of 10,024 breakthrough infections. Brain Behav. Immun. 2022;103:154–62. DOI: 10.1016/j.bbi.2022.04.013</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Watanabe A., Iwagami M., Yasuhara J., Takagi H. et al. Protective effect of COVID-19 vaccination against long COVID syndrome: a systematic review and meta-analysis. Vaccine. 2023;41(11): 1783–90. DOI: 10.1016/j.vaccine.2023.02.008</mixed-citation><mixed-citation xml:lang="en">Watanabe A., Iwagami M., Yasuhara J., Takagi H. et al. Protective effect of COVID-19 vaccination against long COVID syndrome: a systematic review and meta-analysis. Vaccine. 2023;41(11): 1783–90. DOI: 10.1016/j.vaccine.2023.02.008</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
