<?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>2075-6194</journal-id>
<journal-title><![CDATA[Revista de Investigacion e Informacion en Salud]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Inv. Inf. Sal.]]></abbrev-journal-title>
<issn>2075-6194</issn>
<publisher>
<publisher-name><![CDATA[Universidad Privada del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2075-61942025000200097</article-id>
<article-id pub-id-type="doi">10.52428/20756208.v20i49.1436</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Características epidemiológicas y clínicas de la influenza en pacientes hospitalizados en Santa Cruz, Bolivia, 2025: estudio descriptivo]]></article-title>
<article-title xml:lang="en"><![CDATA[Epidemiological and clinical characteristics of influenza in hospitalized patients, Santa Cruz, Bolivia, 2025: a descriptive study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ugarte-Coronel]]></surname>
<given-names><![CDATA[Daisy Cecilia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Añez-Valdez]]></surname>
<given-names><![CDATA[Arletta Rocio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Pontificia San Francisco Xavier  ]]></institution>
<addr-line><![CDATA[Santa Cruz ]]></addr-line>
<country>Bolivia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Pontificia San Francisco Xavier  ]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>20</volume>
<numero>49</numero>
<fpage>97</fpage>
<lpage>105</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S2075-61942025000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S2075-61942025000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S2075-61942025000200097&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  La influenza es una enfermedad respiratoria aguda con alta capacidad de mutación y transmisión, asociada a epidemias estacionales y pandemias. En Bolivia, el departamento de Santa Cruz reportó un aumento de casos en 2025, lo que motivó la declaración de alerta roja. El objetivo del estudio es describir las características epidemiológicas y clínicas de los pacientes hospitalizados por influenza en el Hospital Obrero N°3 de Santa Cruz, Bolivia.  Material y métodos:  Estudio observacional, descriptivo en pacientes mayores de15 años hospitalizados entre el 1 de enero y el 17 de mayo de 2025, con diagnóstico confirmado de influenza por reacción en cadena de la polimerasa con retro transcripción. Se analizaron variables sociodemográficas, clínicas, comorbilidades, estado de vacunación, subtipo viral, ingreso la unidad de cuidados intensivos y condición de egreso.  Resultados:  Se incluyeron 88 pacientes. La mayoría mayor a 60 años (64%) con comorbilidades (86%), principalmente hipertensión (40%) y diabetes (32%). Solo el 17% estaba vacunado. Los síntomas más frecuentes fueron tos (100%), fiebre (97%) y disnea (97%). El subtipo predominante fue A(H1N1) pdm09 (97%). Un 25% requirió unidad de cuidados intensivos y 24% falleció.  Discusión:  Los casos graves de influenza en Santa Cruz se concentraron en adultos mayores con comorbilidades, baja cobertura de vacunación y predominio del subtipo A(H1N1) pdm09. Los hallazgos resaltan la necesidad de fortalecer la vacunación y la vigilancia epidemiológica para reducir la carga de la enfermedad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Influenza is an acute respiratory disease with high mutation and transmission capacity, associated with seasonal epidemics and pandemics. In Bolivia, the department of Santa Cruz reported an increase in cases in 2025, which led to the declaration of a red alert. The aim of this study is to describe the epidemiological and clinical characteristics of patients hospitalized with influenza at Hospital Obrero No.3 in Santa Cruz, Bolivia.  Material and Methods:  Observational, descriptive study in patients over 15 years of age hospitalized between January 1 and May 17, 2025, with confirmed influenza diagnosis by reverse transcription polymerase chain reaction (RT-PCR). Sociodemographic and clinical variables, comorbidities, vaccination status, viral subtype, admission to the intensive care unit, and discharge outcome were analyzed.  Results:  A total of 88 patients were included. Most were over 60 years old (64%) and had comorbidities (86%), mainly hypertension (40%) and diabetes (32%). Only 17% were vaccinated. The most frequent symptoms were cough (100%), fever (97%), and dyspnea (97%). The predominant subtype was A(H1N1) pdm09 (97%). Twenty-five percent required admission to the intensive care unit, and 24% died.  Discussion:  Severe influenza cases in Santa Cruz were concentrated among older adults with comorbidities, low vaccination coverage, and predominance of the A(H1N1) pdm09 subtype. The findings highlight the need to strengthen vaccination and epidemiological surveillance to reduce the disease burden.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bolivia]]></kwd>
<kwd lng="es"><![CDATA[Clínica]]></kwd>
<kwd lng="es"><![CDATA[Epidemiologia]]></kwd>
<kwd lng="es"><![CDATA[Hospitalización]]></kwd>
<kwd lng="es"><![CDATA[H1N1]]></kwd>
<kwd lng="es"><![CDATA[influenza]]></kwd>
<kwd lng="en"><![CDATA[Bolivia]]></kwd>
<kwd lng="en"><![CDATA[Clinic]]></kwd>
<kwd lng="en"><![CDATA[H1NI]]></kwd>
<kwd lng="en"><![CDATA[Hospitalization]]></kwd>
<kwd lng="en"><![CDATA[Influenza]]></kwd>
</kwd-group>
</article-meta>
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