<?xml version="1.0" encoding="ISO-8859-1"?><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">
<front>
<journal-meta>
<journal-id>1665-1146</journal-id>
<journal-title><![CDATA[Boletín médico del Hospital Infantil de México]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Med. Hosp. Infant. Mex.]]></abbrev-journal-title>
<issn>1665-1146</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud, Hospital Infantil de México Federico Gómez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-11462021000600506</article-id>
<article-id pub-id-type="doi">10.24875/bmhim.20000250</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Clinical and epidemiological characteristics of COVID-19 in children: experience in two hospitals]]></article-title>
<article-title xml:lang="es"><![CDATA[Características clínicas y epidemiológicas de la COVID-19 en niños: experiencia en dos centros hospitalarios]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-García]]></surname>
<given-names><![CDATA[Jesús J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Méndez]]></surname>
<given-names><![CDATA[Jesús E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarid-Coronel]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lares-Payan]]></surname>
<given-names><![CDATA[Angélica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Picasso-López]]></surname>
<given-names><![CDATA[Denih E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Sicairos]]></surname>
<given-names><![CDATA[Nidia M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rochin-Terán]]></surname>
<given-names><![CDATA[Juan L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Villaseñor]]></surname>
<given-names><![CDATA[Héctor M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canizalez-Román]]></surname>
<given-names><![CDATA[Adrián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Medicina Centro de Investigación Aplicada a la Salud Publica]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Pediátrico de Sinaloa Rigoberto Aguilar Pico Unidad de Terapia Intensiva Pediátrica ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General Regional No. 1 Servicio de Pediatría]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Pediátrico de Sinaloa Rigoberto Aguilar Pico Departamento de Investigación ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital Civil Centro de Investigación y Docencia en Ciencias de la Salud Servicio de Imagenología]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Laboratorio Estatal de Salud Pública del Estado de Sinaloa  ]]></institution>
<addr-line><![CDATA[ Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Hospital de la Mujer SSA Departamento de Investigación ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>78</volume>
<numero>6</numero>
<fpage>506</fpage>
<lpage>514</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462021000600506&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462021000600506&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462021000600506&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The COVID-19 pandemic is the most significant current public health crisis.  Methods: We conducted a retrospective case series, including patients under 18 years of age admitted to respiratory triage and hospitalized with COVID-19 infection in two hospital centers. Epidemiological, clinical, laboratory and radiological findings were documented. The diagnosis of COVID-19 was confirmed by real-time reverse transcription-polymerase chain reaction (RT-PCR). For the analysis, patients were classified into three groups: no comorbidities, immunocompromised, and with chronic disease.  Results: Fifty-four patients with COVID-19 were identified: 40 (74.1%) were admitted through respiratory triage. Of these, 28 (70%) were hospitalized, and 14 (25.9%) were already in the hospital. In addition, 26 (48.1%) presented comorbidities. A mild clinical course was observed in 14 cases (53.7%). The mean age was 6 years, with an interquartile range from 11 months to 13 years. The male sex was more frequent, representing 59.3%. Fever was the most common symptom in 74% of the patients. Lymphopenia was observed in 28.6%, and 69.3% had elevated C-reactive protein. Ground glass injuries were documented in 30.9% of COVID-19 cases; 11.1% of the patients required mechanical ventilation and vasopressor treatment.  Conclusions: Fever was the main symptom, and mild infection was the principal presentation. In hospitalized patients with some comorbidity and COVID-19, the disease was more severe, with a high percentage of mortality.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La pandemia de COVID-19 es la mayor crisis de salud pública actual.  Métodos: Análisis de una serie de casos retrospectiva de pacientes menores de 18 años que ingresaron al triaje respiratorio y de pacientes hospitalizados con COVID-19 en dos centros hospitalarios. Se registraron variables epidemiológicas, clínicas, de laboratorio y radiológicas. El diagnóstico de COVID-19 fue confirmado por reacción en cadena de la polimerasa con transcriptasa inversa en tiempo real (RT-PCR). Para el análisis, los pacientes se clasificaron en tres grupos: sin comorbilidad, inmunocomprometidos y con enfermedad crónica.  Resultados: Se identificaron 54 pacientes con COVID-19, de los cuales 40 (74.1%) ingresaron por el triaje respiratorio y, de estos, 28 (70%) fueron hospitalizados y 14 (25.9%) ya estaban hospitalizados; 26 pacientes (48.1%) presentaban comorbilidad. El curso clínico leve se observó con mayor frecuencia, en 14 casos (53.7%). La mediana de edad fue de 6 años (rango intercuartílico: 11 meses a 13 años). El sexo masculino fue más frecuente, con el 59.3%. La fiebre fue el síntoma más común, en el 74% de los pacientes. Se observó linfocitopenia en el 28.6%, y el 69.3% presentaron elevación de la proteína C reactiva. Las lesiones en vidrio esmerilado se documentaron en el 30.9% de los casos y el 11.1% de los pacientes requirieron ventilación mecánica y tratamiento vasopresor.  Conclusiones: La fiebre fue el síntoma principal y la presentación leve de la enfermedad fue la más frecuente. En los pacientes hospitalizados con alguna comorbilidad e infectados por COVID-19, la gravedad de la enfermedad fue mayor, con un alto porcentaje de mortalidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Clinical features]]></kwd>
<kwd lng="en"><![CDATA[Computed tomography]]></kwd>
<kwd lng="en"><![CDATA[Children]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Características clínicas]]></kwd>
<kwd lng="es"><![CDATA[Tomografía computarizada]]></kwd>
<kwd lng="es"><![CDATA[Niños]]></kwd>
</kwd-group>
</article-meta>
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