<?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>2448-9190</journal-id>
<journal-title><![CDATA[Revista alergia México]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. alerg. Méx.]]></abbrev-journal-title>
<issn>2448-9190</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Inmunología Clínica y Alergia A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-91902025000400305</article-id>
<article-id pub-id-type="doi">10.29262/ram.v72i4.1535</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sensibilización a polietilenglicol y polisorbato en pacientes alérgicos con reacciones adversas sistémicas posterior a la vacunación contra COVID-19]]></article-title>
<article-title xml:lang="en"><![CDATA[Sensitization to polyethylene glycol and polysorbate in allergic patients with systemic adverse reactions following COVID-19 vaccination]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Gonzaga]]></surname>
<given-names><![CDATA[Edgar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caballero-López]]></surname>
<given-names><![CDATA[Chrystopherson Gengyny]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-García]]></surname>
<given-names><![CDATA[Aída Inés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivero-Yeverino]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos-López]]></surname>
<given-names><![CDATA[Juan Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Papaqui-Tapia]]></surname>
<given-names><![CDATA[José Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-Sánchez]]></surname>
<given-names><![CDATA[Dulce Mariel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarez-Rivera]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jordá-Rodríguez]]></surname>
<given-names><![CDATA[Elisa Ortega]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villada-Villada]]></surname>
<given-names><![CDATA[Erika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Universitario de Puebla Servicio de Alergia e Inmunología Clínica ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Universitario de Puebla Servicio de Medicina Interna ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>72</volume>
<numero>4</numero>
<fpage>305</fpage>
<lpage>311</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-91902025000400305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-91902025000400305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-91902025000400305&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Determinar la frecuencia de sensibilización a polietilenglicol y/o polisorbato en pacientes alérgicos, con esquema de vacunación completo contra COVID-19, que manifestaron reacciones adversas sistémicas.  Métodos: Estudio transversal, descriptivo, observacional y prolectivo, llevado a cabo en pacientes alérgicos, de 18 a 60 años, con esquema de vacunación completo contra COVID-19, con reacciones adversas sistémicas. Se realizaron pruebas cutáneas con polietilenglicol 2000 y polisorbato 80. Los resultados se analizaron mediante el cálculo de promedios, porcentajes y frecuencias.  Resultados: Se registraron 55 pacientes (74.5% mujeres), con promedio de edad de 31.4 (DE 11.6). El diagnóstico alergológico más prevalente fue rinitis alérgica, las reacciones adversas fueron tardías en 54 pacientes, reportándose mialgias como la más común. Se encontró sensibilización en 40%, de estos 32.7% fueron positivos a polisorbato 80. Las vacunas con mayor prevalencia de sensibilización fueron AstraZeneca y Sputnik. Aparecieron reacciones adversas durante las pruebas cutáneas en 5 pacientes y el evento adverso más frecuente fue cefalea.  Conclusiones: Se encontró alta frecuencia de sensibilización a polietilenglicol 2000 y polisorbato 80. En los pacientes sensibilizados se pueden recomendar alternativas con vacunas que no contengan los excipientes a los que resultaron positivos con el fin de evitar el riesgo de eventos adversos posteriores.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To determine the frequency of sensitization to polyethylene glycol and polysorbate in allergic patients with a complete vaccination schedule against COVID-19 who presented systemic adverse reactions.  Methods: Cross-sectional, descriptive, observational and prolective study. Allergic patients between 18 and 60 years old, with complete vaccination schedule against COVID-19, with systemic adverse reactions were included. Skin tests were performed with polyethylene glycol 2000 and PS 80. The results were analyzed by calculating averages, percentages and frequencies.  Results: Fifty-five patients were included, 74.5% were women, average age was 31.4 (SD 11.6), the most prevalent allergologic diagnosis was allergic rhinitis, adverse reactions after vaccination were late in 54 patients, with myalgias being the most common. Sensitization was found in 40%, of these 32.7% were positive to polysorbate 80. The vaccines with the highest prevalence of sensitization were AstraZeneca and Sputnik. Adverse reactions during skin testing occurred in 5 patients and the most frequent adverse event was headache.  Conclusions: A high frequency of sensitization to polyethylene glycol 2000 and polysorbate 80 was found. In sensitized patients, alternatives with vaccines that do not contain the excipients to which they were positive can be recommended to avoid the risk of subsequent adverse events.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Polietilenglicol]]></kwd>
<kwd lng="es"><![CDATA[Polisorbato]]></kwd>
<kwd lng="es"><![CDATA[Vacunación]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Prueba cutánea]]></kwd>
<kwd lng="es"><![CDATA[Rinitis alérgica]]></kwd>
<kwd lng="es"><![CDATA[Mialgias]]></kwd>
<kwd lng="en"><![CDATA[Polyethylene glycol]]></kwd>
<kwd lng="en"><![CDATA[Polysorbate]]></kwd>
<kwd lng="en"><![CDATA[Vaccination]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Skin test]]></kwd>
<kwd lng="en"><![CDATA[Allergic rhinitis]]></kwd>
<kwd lng="en"><![CDATA[Myalgia]]></kwd>
</kwd-group>
</article-meta>
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