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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="other" 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">824</article-id><article-id pub-id-type="doi">10.36233/0372-9311-2020-97-3-2</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>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Preliminary Clinical and Epidemiological Analysis of the First 1,000 Pediatric COVID-19 Cases in Moscow Region</article-title><trans-title-group xml:lang="ru"><trans-title>Предварительный клинико-эпидемиологический анализ первых 1000 случаев COVID-19 у детей в Московской области</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1960-6868</contrib-id><name-alternatives><name xml:lang="en"><surname>Meskina</surname><given-names>Elena R.</given-names></name><name xml:lang="ru"><surname>Мескина</surname><given-names>Елена Руслановна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Head, Children’s infectious disease department</p></bio><bio xml:lang="ru"><p>д.м.н., зав. отд. детских инфекций отдела терапии</p></bio><email>meskinaelena@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.F. Vladimirsky Moscow Regional Research and Clinical Institute</institution></aff><aff><institution xml:lang="ru">ГБУЗ МО «Московский областной научно-исследовательский клинический институт им. М.Ф. Владимирского»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-06-25" publication-format="electronic"><day>25</day><month>06</month><year>2020</year></pub-date><volume>97</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>202</fpage><lpage>213</lpage><history><date date-type="received" iso-8601-date="2020-06-25"><day>25</day><month>06</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-06-25"><day>25</day><month>06</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Meskina E.R.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Мескина Е.Р.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Meskina E.R.</copyright-holder><copyright-holder xml:lang="ru">Мескина Е.Р.</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/824">https://microbiol.crie.ru/jour/article/view/824</self-uri><abstract xml:lang="en"><p><bold>Rationale</bold>. The novel coronavirus infection caused by SARS-CoV-2 (COVID-19) continues to spread worldwide, though the epidemiological situation varies across countries. It is of interest to estimate the pediatric incidence in a separate constituent entity of the Russian Federation, Moscow Region (MR) closely connected with Moscow (accounting for the highest number of COVID-19 cases in Russia). Assessment of the epidemiological data is interesting due to the late onset of the epidemic outbreak, the preventive lockdown imposed during the early stages, and extensive testing of all the identified contacts.</p> <p><bold>Purpose</bold> of the study: Assessment of the pediatric incidence of COVID-19, including identification of its main clinical and epidemiological characteristics, based on the monitoring data for the current situation in MR.</p> <p><bold>Materials and methods</bold>. A retrospective analysis of all pediatric cases of laboratory-confirmed COVID-19 in MR (1,047 children of all ages) was performed. The time span covered the data of the daily monitoring of the epidemiological situation from the beginning of reporting (53 days in total). The information was obtained from the database of the Rospotrebnadzor Territorial Administration of MR and collected in compliance with the regulations on Daily Monitoring of Children with Coronavirus Infection, Management Section, State Information System, MR.</p> <p><bold>Results.</bold> The pediatric cases of COVID-19 accounted for 6.3% (95% CI2 5.9–6.7) of all the cases reported by 6/5/2020 (16,590); the total infection rate of the pediatric population in the region was 0.07% (0.06–0.09). The basic reproduction number ranged from 4.8 (during the two-week exponential growth phase) to 2.7 (during the later period characterized by a slowdown in the incidence rate) and averaged 3.8 (3.0–4.57). The clustering rate of COVID-19 among children was high, reaching 82.8% (79.7–85.6) with a small average number of cases detected in the cluster — 1.21 (1.16–1.26). Asymptomatic COVID-19 cases prevailed significantly, amounting to 62.2% (59.2–65.1), including 73.1% in newborns; severe cases accounted for 0.38% (0.35–0.41) and hospitalized cases totaled 12.0 (10.1–14.2). No death cases were reported. The mean age of the diseased and infected was 8 [4; 13] years old. Boys prevailed insignificantly (53.2%).</p> <p><bold>Conclusion.</bold> There is a distinct stage-by-stage development of the epidemic situation among children in MR. In the pediatric population, COVID-19 was generally acquired from a secondary household transmission within family clusters. Early preventive measures and extensive testing helped to reduce the period of exponential growth and, therefore, to avoid large clusters of infection. In addition, 17.2% of the COVID-19 clusters were identified as those where the child was the first to become sick. In the future, it is necessary to practice distancing and provide effective isolation of diseased children and adults, since the high rate of incidence in children can lag behind the incidence rate in adults.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность</bold>. Новая коронавирусная инфекция, вызванная SARS-CoV-2 (COVID-19), продолжает распространяться по миру, однако эпидемиологическая ситуация отличается в разных странах. Представляет интерес оценить педиатрическую заболеваемость в отдельном субъекте России — Московской области (МО), тесно взаимосвязанной с Москвой (где зарегистрировано максимальное количество случаев COVID-19 в России). Оценка эпидемиологических данных интересна в связи с поздним началом эпидемического подъема, внедрением на ранних этапах превентивного локдауна, широким тестированием всех выявленных контактных лиц.</p> <p><bold>Цель работы</bold> — оценить педиатрическую заболеваемость COVID-19 с определением ее ведущих клинико-эпидемиологических характеристик на материалах официального мониторинга за текущей ситуацией в МО.</p> <p><bold>Материалы и методы</bold>. Проведен ретроспективный анализ всех педиатрических случаев лабораторно подтвержденной COVID-19 в МО (1047 детей всех возрастов) с момента начала регистрации в порядке ежедневного мониторинга за эпидемиологической ситуацией (суммарно в течение 53 дней). Информация извлечена из базы данных Территориального управления Роспотребнадзора МО и собрана в рамках свода по форме «Ежедневный мониторинг детей с коронавирусной инфекцией», приложение ГАС «Управление» МО.</p> <p><bold>Результаты</bold>. Доля педиатрических случаев COVID-19 среди всех зарегистрированных на 06.05.2020 (16 590) составила 6,3% (95% ДИ<sup>1</sup> 5,9–6,7), общая инфицированность педиатрической популяции субъекта — 0,07% (0,06–0,09). Средний индекс репродукции колебался в пределах от 4,8 (на этапе двухнедельного экспоненциального роста) до 2,7 (в последующем периоде более медленного прироста заболеваемости) и составил в среднем 3,8 (3,0–4,57). Коэффициент очаговости COVID-19 среди детей был высоким — 82,8% (79,7–85,6) с небольшим средним числом выявленных случаев в очаге — 1,21 (1,16–1,26). Значительно преобладали бессимптомные формы COVID-19 — 62,2% (59,2–65,1), в том числе у новорожденных — 73,1%, с низкой частотой тяжелых форм — 0,38% (0,35–0,41) и низким индексом госпитализации — 12,0 (10,1–14,2). Летальность отсутствовала. Средний возраст заболевших и инфицированных — 8 [4; 13] лет. Мальчики преобладали незначительно (53,2%).</p> <p><bold>Выводы</bold>. Прослеживается отчетливая этапность развития эпидемической ситуации среди детей в МО. Передача COVID-19 в детской популяции осуществлялась главным образом в семейных очагах с вторичным распространением. Благодаря ранним превентивным мерам и широкому тестированию период экспоненциального роста был коротким, удалось избежать крупных очагов инфекции, дополнительно выявлено 17,2% очагов COVID-19, в которых первым заболевшим был ребенок. Необходимо в дальнейшем соблюдать дистанцирование и обеспечивать эффективную изоляцию заболевших детей и взрослых, поскольку вероятность высокой педиатрической заболеваемости может запаздывать по сравнению со взрослыми.</p></trans-abstract><kwd-group xml:lang="en"><kwd>children</kwd><kwd>coronavirus infection</kwd><kwd>SARS-CoV-2</kwd><kwd>COVID-19 epidemiology</kwd><kwd>epidemiological analysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>дети</kwd><kwd>коронавирусная инфекция</kwd><kwd>SARS-CoV-2</kwd><kwd>эпидемиология COVID-19</kwd><kwd>эпидемиологический анализ</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Pachetti M., Marini B., Benedetti F., Giudici F., Mauro E., Storici P., et al. Emerging SARS-CoV-2 mutation hot spots include a novel RNA-dependent-RNA polymerase variant. J. Transl. Med. 2020; 18(1): 179. 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