<?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>S1665-11462021000100066</article-id>
<article-id pub-id-type="doi">10.24875/bmhim.20000217</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Development of SARS-CoV-2 vaccines]]></article-title>
<article-title xml:lang="es"><![CDATA[Desarrollo de vacunas contra el SARS-CoV-2]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barajas-Nava]]></surname>
<given-names><![CDATA[Leticia A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Unidad de Investigación de Medicina Basada en Evidencias ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2021</year>
</pub-date>
<volume>78</volume>
<numero>1</numero>
<fpage>66</fpage>
<lpage>74</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462021000100066&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462021000100066&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462021000100066&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The coronavirus disease 2019 (COVID-19) pandemic has posed significant challenges globally. Continuous transmission of the virus is mostly due to insufficient infection control measures and a lack of vaccines. Therefore, this review aimed to identify and describe possible vaccines for the prevention of COVID-19.  Methods: A systematic review of the scientific literature was performed through electronic searches of the main databases to identify published reports or studies on vaccines under development against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Websites from international organizations, institutes of health and research, Google, and references from identified studies were also reviewed. Studies examining the mechanisms of infection, immunopathology, and genomics were excluded.  Results: A total of 141 vaccines in development against SARS-CoV-2 were identified. The technologies used include weakened and inactive viruses, viral vectors, nucleic acids, and proteins. So far, 13 vaccines (9.2%) are under clinical evaluation; only the AZD1222 vaccine is under clinical evaluation Phase II-III. Ad5-nCoV and mRNA-1273 vaccines showed to produce neutralizing antibodies and also to be safe.  Conclusions: Despite efforts invested in developing SARS-CoV-2 vaccines, more research is still required. The vaccine developers, international health organizations, and the decision-makers of health policies must carry out conjunct cooperation to face the different challenges and guarantee the development of an effective vaccine.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La pandemia de COVID-19 ha planteado grandes retos en todo el mundo. La transmisión continua del virus se debe, en gran parte, a las medidas deficientes para el control de infecciones y a la falta de vacunas. El objetivo de esta revisión fue identificar y describir las posibles vacunas para la prevención de la COVID-19.  Métodos: Se realizó una revisión sistemática de la literatura científica mediante búsquedas en las principales bases de datos electrónicas, para identificar informes o estudios publicados sobre las vacunas en proceso de desarrollo contra el SARS-CoV-2. También se revisaron páginas web de organismos internacionales, institutos de salud e investigación, Google y las referencias de los estudios identificados. Se excluyeron los estudios que examinaron los mecanismos de infección, inmunopatológicos y de genómica.  Resultados: En total se identificaron 141 vacunas en desarrollo contra el SARS-CoV-2. Las tecnologías utilizadas incluyen virus debilitados e inactivos, vectores virales, ácidos nucleicos y proteínas. Hasta el momento solo 13 vacunas (9.2%) se encuentran en proceso de evaluación clínica y solo la vacuna AZD1222 se encuentra en fase II-III. Las vacunas Ad5-nCoV y mRNA-1273 han mostrado producción de anticuerpos neutralizantes, además de ser seguras.  Conclusiones: A pesar de los esfuerzos invertidos para el desarrollo de vacunas contra el SARS-CoV-2, aún se requiere más investigación. Es necesario que los desarrolladores de vacunas, los organismos internacionales de salud y los tomadores de decisiones de políticas sanitarias cooperen para afrontar los diferentes desafíos y garantizar el desarrollo de una vacuna eficaz.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Severe acute respiratory syndrome coronavirus 2]]></kwd>
<kwd lng="en"><![CDATA[Coronavirus disease 2019]]></kwd>
<kwd lng="en"><![CDATA[Infection]]></kwd>
<kwd lng="en"><![CDATA[Prevention]]></kwd>
<kwd lng="en"><![CDATA[Vaccine]]></kwd>
<kwd lng="en"><![CDATA[Biotechnology]]></kwd>
<kwd lng="es"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Infección]]></kwd>
<kwd lng="es"><![CDATA[Prevención]]></kwd>
<kwd lng="es"><![CDATA[Vacuna]]></kwd>
<kwd lng="es"><![CDATA[Biotecnología]]></kwd>
</kwd-group>
</article-meta>
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