<?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">869</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2024-23-2-107-115</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">The clinical course of the novel coronavirus disease in children after allogeneic hematopoietic stem cell transplantation</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности течения новой коронавирусной инфекции у детей после трансплантации гемопоэтических стволовых клеток</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5606-4335</contrib-id><name-alternatives><name xml:lang="en"><surname>Vereshchagina</surname><given-names>A. O.</given-names></name><name xml:lang="ru"><surname>Верещагина</surname><given-names>А. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Anastasia O. Vereshchagina,</bold> a hematologist at the Department of Infection Control </p><p><italic>1 Samory Mashela St., Moscow 117997, Russia</italic></p></bio><bio xml:lang="ru"><p><bold>Верещагина Анастасия Олеговна</bold>, врач-гематолог отделения инфекционного контроля </p><p><italic>117997, Москва, ул. Саморы Машела, 1</italic></p></bio><email>a.vereshchagina@dgoi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><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><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4456-2369</contrib-id><name-alternatives><name xml:lang="en"><surname>Bykova</surname><given-names>T. A.</given-names></name><name xml:lang="ru"><surname>Быкова</surname><given-names>Т. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Saint-Petersburg</italic></p></bio><bio xml:lang="ru"><p><italic>Санкт-Петербург</italic></p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8536-5495</contrib-id><name-alternatives><name xml:lang="en"><surname>Popova</surname><given-names>M. O.</given-names></name><name xml:lang="ru"><surname>Попова</surname><given-names>М. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Saint-Petersburg</italic></p></bio><bio xml:lang="ru"><p><italic>Санкт-Петербург</italic></p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2689-0569</contrib-id><name-alternatives><name xml:lang="en"><surname>Balashov</surname><given-names>D. N.</given-names></name><name xml:lang="ru"><surname>Балашов</surname><given-names>Д. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6291-8849</contrib-id><name-alternatives><name xml:lang="en"><surname>Suvorova</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Суворова</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5269-5508</contrib-id><name-alternatives><name xml:lang="en"><surname>Rozanceva</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Розанцева</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2410-1223</contrib-id><name-alternatives><name xml:lang="en"><surname>Levin</surname><given-names>P. A.</given-names></name><name xml:lang="ru"><surname>Левин</surname><given-names>П. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2594-7703</contrib-id><name-alternatives><name xml:lang="en"><surname>Zubarovskaya</surname><given-names>L. S.</given-names></name><name xml:lang="ru"><surname>Зубаровская</surname><given-names>Л. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Saint-Petersburg</italic></p></bio><bio xml:lang="ru"><p><italic>Санкт-Петербург</italic></p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2322-5734</contrib-id><name-alternatives><name xml:lang="en"><surname>Novichkova</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Новичкова</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><italic>Moscow</italic></p></bio><bio xml:lang="ru"><p><italic>Москва</italic></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><aff-alternatives id="aff2"><aff><institution xml:lang="en">R.M. Gorbacheva Research Institute for Pediatric Oncology, Hematology and Transplantation of the I.P. Pavlov First Saint Petersburg State Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-07-08" publication-format="electronic"><day>08</day><month>07</month><year>2024</year></pub-date><volume>23</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>107</fpage><lpage>115</lpage><history><date date-type="received" iso-8601-date="2024-07-21"><day>21</day><month>07</month><year>2024</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/869">https://hemoncim.com/jour/article/view/869</self-uri><abstract xml:lang="en"><p>The clinical course of the novel coronavirus disease (COVID-19) in patients with oncological and hematological diseases after hematopoietic stem cell transplantation (HSCT), are of special interest. To further investigate the problem, a two-center study was undertaken at the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology and the R.M. Gorbacheva National Research Institute for Pediatric Oncology, Hematology and Transplantation between January 2020 and January 2023. This was a retrospective-prospective, non-randomized, non-interventional study that included children aged 0–19 years with oncological and hematological diseases and primary immunodeficiencies who had undergone allogeneic HSCT and subsequently contracted 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. COVID-19 cases were confirmed by polymerase chain reaction testing and classified as asymptomatic, mild, moderate, severe, and critical. The study included 105 patients with a median age of 9 years; male patients were predominant (the male-to-female ratio was 1.8:1). The primary diseases were hematological malignancies (73%), benign hematological diseases (14%) and primary immunodeficiencies (13%). The most common clinical symptoms of COVID-19 were fever, gastrointestinal symptoms, and respiratory symptoms; 40% of COVID-19 cases were asymptomatic. Lymphopenia was found to be a risk factor for severe COVID-19. The patients without immune reconstitution had a longer persistence of the COVID-19 virus than those with immune reconstitution (17 days versus 13 days), however, no significant differences were obtained (<italic>p </italic>= 0.7). There were also no significant differences in the severity and outcomes of COVID-19 between the patients with immune reconstitution and those without reconstitution. There was no effect of therapy on the duration of COVID-19, and there was no association between the type of treatment and the duration of the disease. The overall survival rate in the allo-HSCT recipients who had been diagnosed with COVID-19 was 88%, which was lower than in the non-recipients (88% vs 94%; <italic>p </italic>= 0,077).</p></abstract><trans-abstract xml:lang="ru"><p>Особенности течения новой коронавирусной инфекции (COVID-19) у пациентов с гематологическими/ онкогематологическими заболеваниями, перенесших трансплантацию гемопоэтических стволовых клеток (ТГСК), представляют большой интерес. В связи с этим с января 2020 г. по январь 2023 г. было проведено двуцентровое исследование на базе НМИЦ ДГОИ им. Дмитрия Рогачева и НИИ ДОГиТ им. Р.М. Горбачевой. Исследование являлось ретроспективно-проспективным, нерандомизированным, неинтервенционным и включало детей от 0 до 19 лет с гематологическими/ онкогематологическими заболеваниями и первичными иммунодефицитными синдромами на разных этапах после проведения аллогенной ТГСК с подтвержденным диагнозом COVID-19. Данное исследование одобрено независимым этическим комитетом и утверждено решением ученого совета НМИЦ ДГОИ им. Дмитрия Рогачева. Инфекция COVID-19 была установлена методом полимеразной цепной реакции и подразделялась на легкую, среднетяжелую, тяжелую и крайне тяжелую формы. В исследование были включены 105 детей с медианой возраста 9 лет и преобладанием пациентов мужского пола с соотношением мальчиков и девочек 1,8:1. Основными заболеваниями являлись гемобластозы (73%), доброкачественные гематологические заболевания (14%) и первичные иммунодефицитные синдромы (13%). Наиболее частыми клиническими проявлениями были лихорадка, кишечный синдром и респираторная симптоматика, в 40% случаев инфекция протекала бессимптомно. Фактором, коррелирующим с развитием тяжелых форм заболевания, являлась лимфопения. У пациентов без иммунореконституции отмечалась более длительная персистенция вируса COVID-19: 17 дней против 13, однако достоверных различий получено не было (<italic>p</italic><italic> </italic>= 0,7), различий между формами тяжести и исходами COVID-19 также выявлено не было. Влияния терапии на длительность течения COVID-19, ассоциации между видами лечения и продолжительностью заболевания не наблюдалось. Общая выживаемость реципиентов ТГСК при развитии COVID-19 была ниже по сравнению с нетрансплантированными пациентами: 88% против 94%; <italic>p</italic><italic> </italic>= 0,077.</p></trans-abstract><kwd-group xml:lang="en"><kwd>the novel coronavirus infection</kwd><kwd>SARS-CoV-2</kwd><kwd>COVID-19</kwd><kwd>hematopoietic stem cell transplantation</kwd><kwd>children</kwd><kwd>oncohematology</kwd><kwd>chemotherapy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>новая коронавирусная инфекция</kwd><kwd>SARS-CoV-2</kwd><kwd>COVID-19</kwd><kwd>трансплантация гемопоэтических стволовых клеток</kwd><kwd>дети</kwd><kwd>онкогематология</kwd><kwd>химиотерапия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>World Health Organization. Coronavirus disease (COVID-19) pandemic. [Electronic resource] URL: https://www.who.int/emergencies/diseases/novel-coronavirus-2019; 2023 (accessed 13 April 2023).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Vardavas C.I., Mathioudakis A.G., Nikitara K., Stamatelopoulos K., Georgiopoulos G., Phalkey R., et al. Prognostic factors for mortality, intensive care unit and hospital admission due to SARS-CoV-2: a systematic review and meta-analysis of cohort studies in Europe. Eur Respir Rev 2022; 31 (166): 220098. DOI: 10.1183/16000617.0098-2022</mixed-citation></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Ryan L. Vaccinated but not protected-living immunocompromised during the pandemic. JAMA 2021; 325 (24): 2443–4. DOI: 10.1001/ jama.2021.9321</mixed-citation><mixed-citation xml:lang="ru">Ryan L. Vaccinated but not protected-living immunocompromised during the pandemic. JAMA 2021; 325 (24): 2443–4. DOI: 10.1001/jama.2021.9321</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><mixed-citation>Balashov D., Trakhtman P., Livshits A., Kovalenko I., Tereshenko G., Solopova G., et al. SARS-CoV-2 convalescent plasma therapy in pediatric patient after hematopoietic stem cell transplantation. Transfus Apher Sci 2021; 60 (1): 102983.</mixed-citation></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Prevention, diagnosis and treatment of the novel coronavirus infection (COVID-19). Temporary guidelines of the Ministry of Healthcare of the Russian Federation. Version 8 dated 03.09.2020 [Electronic resource] URL: https://static-0.minzdrav.gov.ru/system/attachments/attaches/000/051/777/original/030902020_COVID-19_v8.pdf. (Access date 14.04.2024). (In Russ.).</mixed-citation><mixed-citation xml:lang="ru">Профилактика, диагностика и лечение новой коронавирусной инфекции (COVID-19). Временные методические рекомендации Министерства здравоохранения Российской Федерации. Версия 8 от 3.09.2020. [Электронный ресурс] URL: https://static-0.minzdrav.gov.ru/system/attachments/attaches/000/051/777/original/030902020_COVID-19_v8.pdf. (дата обращения 14.04.2024).</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Leontyeva M.E., Sultanova E.R., Radygina S.A., Skvortsova Yu.V., Muzalevskiy Ya.O., Kurnikova E.E., et al. The use of adoptive cell therapy for the treatment of SARS-CoV-2 in a patient after allogeneic hematopoietic stem cell transplantation. Pediatric Hematology/Oncology and Immunopathology 2022; 21 (2): 112–7. (In Russ.).</mixed-citation><mixed-citation xml:lang="ru">Леонтьева М.Е., Султанова Э.Р., Радыгина С.А., Скворцова Ю.В., Музалевский Я.О., Курникова Е.Е. и др. Использование адоптивной клеточной терапии для лечения SARS-CoV-2 у пациента после аллогенной трансплантации гемопоэтических стволовых клеток. Вопросы гематологии/онкологии и иммунопатологии в педиатрии 2022; 21 (2): 112–7. DOI: 10.24287/1726-1708-2022-21-2-112-117</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><mixed-citation>Haesler G.M., Amman R.A., Carlesse F., Groll A.H., Averbuch D., Costagnola E., et al. SARS-CoV-2 in children with cancer or following haematopoietic stem cell transplant: an analysis of 131 patients. Eur J Cancer 2021; 159: 78–86.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Lu Y., Li Y., Deng W., Liu M., He Y., Huang L., et al. Symptomatic infection is associated with prolonged duration of viral shedding in mild coronavirus disease 2019: a retrospective study of 110 children in Wuhan. Pediatr Infect Dis J 2020; 39 (7): е95–9.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Sharma A., Bhatt N.S., St Martin A., Abid M.B., Bloomquist J., Chemaly R.F., et al. Clinical characteristics and outcomes of COVID-19 in haematopoietic stem-cell transplantation recipients: an observational cohort study. Lancet Haematol 2021; 8: e185–93. DOI: 10.1016/S2352-3026(20)30429-4</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Pagano L., Salmanton-García J., Marchesi F., Busca A., Corradini P., Hoenigl M., et.al. EPICOVIDEHA working group. COVID-19 infection in adult patients with hematological malignancies: a European Hematology Association Survey (EPICOVIDEHA). J Hematol Oncol 2021; 14 (1): 168. DOI: 10.1186/s13045-02101177-0</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Ljungman P., de la Camara R., Mikulska M., Tridello G., Aguado B., Al Zahrani M., et al. COVID-19 and stem cell transplantation; results from an EBMT and GETH multicenter prospective survey. Leukemia 2021; 35: 2885–94. DOI: 10.1038/s41375-02101302-5</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Aleshina O., Zakurdaeva K., Vasileva A., Dubov S., Dubov V., Vorobyev V., et al. Clinical outcomes in patients with COVID-19 and hematologic disease. [Electronic resource] URL: https://pubmed.ncbi.nlm.nih.gov/?term=Samoylova%20OS%5BAuthor%5D (accessed 14.04.2024).</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Lu X., Zhang L., Du H., Jiang Zh., Li Y., Qu J., et al. SARS‐CoV‐2 infection in children. N Engl J Med 2020; 382: 1663–5. (accessed 13 April 2023).</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Kuczborska K., Książ J. Prevalence and Course of SARS-CoV-2 Infection among Immunocompromised Children Hospitalised in the Tertiary Referral Hospital in Poland. J Clin Med 2021; 10 (19): 4556. DOI: 10.3390/jcm10194556</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Ji L.-N., Chao S., Wang Y.-J., Li X.-J., Mu X.-D., Lin M.-G., et al. Clinical features of pediatric patients with COVID-19: a report of two family cluster cases. World J Pediatr 2020; 16 (3): 267–70.</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Wei M., Yuan J., Liu Y., Fu T., Yu X., Zhang Z.-J. Novel coronavirus infection in hospitalized infants under 1 year of age in China. JAMA 2020; 323: 1313–4.</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Connelly J.A., Chong H., Esbenshade A.J., Frame D., Failing С., Secord Е., Walkovich K. Impact of COVID-19 on Pediatric Immunocompromised Patients. Pediatr Clin North Am 2021; 68 (5): 1029–54.</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Averbuch D., De La Camara R., Corbacioglu S., Mikulska M., Piñana Sanchez J.L.? et al. COVID-19 in Children Following Hematopoietic Cell Transplantation: A Multinational Study of the European Bone Marrow Transplantation Society (EBMT) and the Spanish Group of Hematopoietic Stem Cell Transplantation (GETH). Blood 2021; 138 (S1): 2866. DOI: 10.1182/blood-2021-146748</mixed-citation></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Siniaev A.A., Grinenko A.O., Popova M.O., Rogacheva Yu.A., Spiridonova A.A., Vlasova Yu.Yu., et al. COVID-19 infection in hematopoietic stem cell transplant recipients. Clinical Microbiology and Antimicrobial Chemotherapy 2022; (3): 196–201. (In Russ.).DOI: 10.36488/cmac.2022.3.196-201</mixed-citation><mixed-citation xml:lang="ru">Синяев А.А., Гриненко А.О., Попова М.О., Рогачева Ю.А., Спиридонова А.А., Власова Ю.Ю. и др. Новая коронавирусная инфекция у реципиентов трансплантации гемопоэтических стволовых клеток. Клиническая микробиология и антимикробная химиотерапия 2022; (3): 196–201. DOI: 10.36488/cmac.2022.3.196-201</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">Solopova G.G., Tsyganova E.V., Kondrashova A.V., Gordeeva G.N., Rozanceva E.V., Begunova S.V., et al. The novel coronavirus disease (COVID-19) in children with cancer, hematologic malignancies, and severe immunodeficiencies. Results of monocenter study. Pediatric Hematology/Oncology and Immunopathology 2021; 20 (4): 89–99. (In Russ.) doi: 10.24287/17261708-2021-20-4-89-99</mixed-citation><mixed-citation xml:lang="ru">Солопова Г.Г., Цыганова Е.В., Кондрашова А.В., Гордеева Г.Н., Розанцева Е.В., Бегунова С.В. и др. Особенности течения новой коронавирусной инфекции COVID-19 у детей с онкологическими, онкогематологическими и тяжелыми иммунологическими заболеваниями. Опыт НМИЦ ДГОИ им. Дмитрия Рогачева. Вопросы гематологии/онкологии и иммунопатологии в педиатрии 2021; 20 (4): 89‒99. doi: 10.24287/17261708-2021-20-4-89-99</mixed-citation></citation-alternatives></ref><ref id="B21"><label>21.</label><mixed-citation>Haeusler G.M., Ammann R.A., Carlesse F., Groll A.H., Averbuch D., Castagnola E., et al. SARS-CoV-2 in children with cancer or after haematopoietic stem cell transplant: An analysis of 131 patients. Eur J Cancer 2021; 159: 78–86.</mixed-citation></ref></ref-list></back></article>
