<?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>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132022000200081</article-id>
<article-id pub-id-type="doi">10.24875/gmm.21000674</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento de anticuerpos IgG anti-SARS-CoV-2 en trabajadores de salud pre y posvacunación en un centro oncológico de Guatemala]]></article-title>
<article-title xml:lang="en"><![CDATA[Anti-SARS-CoV-2 IgG antibodies pre- and post-vaccination behavior in health workers from a Guatemalan cancer center]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carías-Alvarado]]></surname>
<given-names><![CDATA[César C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Hun]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valvert]]></surname>
<given-names><![CDATA[Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrios-Menéndez]]></surname>
<given-names><![CDATA[Juan C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kihn-Alarcón]]></surname>
<given-names><![CDATA[Alba]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Falla]]></surname>
<given-names><![CDATA[Vicky de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[Ximing]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escobar-Castro]]></surname>
<given-names><![CDATA[Karla]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Cancerología  ]]></institution>
<addr-line><![CDATA[Guatemala ]]></addr-line>
<country>Guatemala</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Cancerología  ]]></institution>
<addr-line><![CDATA[Guatemala ]]></addr-line>
<country>Guatemala</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Wuhan University Renmin Hospital Cancer Center]]></institution>
<addr-line><![CDATA[Wuhan ]]></addr-line>
<country>China</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto de Cancerología  ]]></institution>
<addr-line><![CDATA[Guatemala ]]></addr-line>
<country>Guatemala</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>158</volume>
<numero>2</numero>
<fpage>81</fpage>
<lpage>85</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132022000200081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132022000200081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132022000200081&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: El estudio de anticuerpos IgG anti-SARS-CoV-2 permite identificar individuos asintomáticos con COVID-19 y evaluar la inmunidad posinfección y posvacunación.  Objetivo: Conocer el comportamiento de los anticuerpos IgG anti-SARS-CoV-2 pre y posvacunación en trabajadores de un centro oncológico.  Métodos: Antes de aplicar la vacuna se analizaron los anticuerpos IgG anti-SARS-CoV-2 (n = 171) con la evaluación de IgG anti-N; después de la segunda dosis se evaluó IgG anti-S (n = 60).  Resultados: Prevacunación, los anticuerpos IgG estaban presentes en 18.71 % de los participantes; se detectaron en 65.22 % de aquellos con antecedente de diagnóstico de COVID-19 y en 11.49 % de aquellos sin antecedentes. Los profesiones con mayor prevalencia fueron enfermeros (28.26 %), paramédicos (27.59 %) y administrativos (27.78 %), p &lt; 0.01. La anosmia, ageusia y opresión en el pecho se asociaron a la presencia de IgG (p &lt; 0.05). Posvacunación, todos los participantes desarrollaron IgG; las personas con diagnóstico previo de COVID-19 presentaron mayores títulos: 10 277 versus 6819 UA/mL, p &lt; 0.001.  Conclusiones: El estudio de anticuerpos IgG anti-SARS-CoV-2 permitió identificar a trabajadores de salud asintomáticos. Un alto porcentaje de los participantes con diagnóstico previo de COVID-19 presentó anticuerpos. Todos los participantes desarrollaron anticuerpos IgG posvacunación; las personas con infección previa presentaron una cuantificación más alta de títulos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: The study of anti-SARS-CoV-2 IgG antibodies allows asymptomatic individuals with COVID-19 to be identified, and post-infection and post-vaccination immunity status to be evaluated.  Objective: To know the behavior of anti-SARS-CoV-2 IgG antibodies before and after vaccination in workers of a cancer center.  Methods: Prior to the application of the vaccine, the presence of anti-SARS-CoV-2 IgG antibodies (n = 171) was analyzed by evaluating anti-N IgG antibodies; post-vaccination, after receiving the second dose, anti-S IgG antibodies were evaluated (n = 60).  Results: Prior to vaccination, IgG antibodies were present in 18.71% of participants; they were detected in 65.22% of those with prior history of COVID-19 diagnosis and in 11.49% of those without it. The positions with the highest prevalence were nurses (28.26%), paramedics (27.59%) and administrative workers (27.78%), p &lt; 0.01. Anosmia, ageusia and chest tightness were associated with the presence of IgG (p &lt; 0.05). Post-vaccination, all participants developed IgG antibodies; people with a previous COVID-19 diagnosis had higher titers: 10,277 vs. 6,819 AU/mL, p &lt; 0.001.  Conclusions: The study of anti-SARS-CoV-2 IgG allowed asymptomatic health workers to be identified. A high percentage of participants with prior COVID-19 diagnosis had antibodies. All participants developed IgG after vaccination, with higher titers being identified in those with previous infection.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Anticuerpos]]></kwd>
<kwd lng="es"><![CDATA[Trabajadores de salud]]></kwd>
<kwd lng="es"><![CDATA[Vacunas]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Antibodies]]></kwd>
<kwd lng="en"><![CDATA[Health workers]]></kwd>
<kwd lng="en"><![CDATA[Vaccines]]></kwd>
</kwd-group>
</article-meta>
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