<?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>S0016-38132020000300209</article-id>
<article-id pub-id-type="doi">10.24875/gmm.20000165</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El nuevo coronavirus que llegó de Oriente: análisis de la epidemia inicial en México]]></article-title>
<article-title xml:lang="en"><![CDATA[The new coronavirus that came from the East: analysis of the initial epidemic in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ornelas-Aguirre]]></surname>
<given-names><![CDATA[José M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora Departamento de Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[ Sonora]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>156</volume>
<numero>3</numero>
<fpage>209</fpage>
<lpage>217</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132020000300209&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132020000300209&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132020000300209&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: A partir del 23 de marzo de 2020, en México se declaró la suspensión de actividades no esenciales en todo el país para mitigar la diseminación de la pandemia de COVID-19.  Objetivo: Analizar los datos sobre los primeros 1510 casos de COVID-19 confirmados por laboratorio en México, describir la distribución geográfica de la enfermedad y su dinámica de transmisión.  Método: Descripción de los primeros casos de COVID-19 con prueba positiva de RT-PCR en tiempo real, así como evaluación de las medidas epidemiológicas, incidencia acumulada, razón de contagios y tasas de mortalidad y letalidad durante el primer mes de la epidemia.  Resultados: La edad promedio fue de 43 años y 58 % fue del sexo masculino; 44 % de los casos iniciales fue importado. La letalidad en la población durante el primer mes pasó de 1.08 a 3.97 por 100 casos; sin embargo, la tendencia es lineal y similar a la observada en Europa.  Conclusiones: En México se está aplicando el distanciamiento social, pero aún se requieren estudios sobre la dinámica de la epidemia, la transmisión de persona a persona, la incidencia de infecciones subclínicas y la supervivencia de los enfermos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction As of March 23, 2020, suspension of non-essential activities was declared in Mexico throughout the country in order to mitigate the spread of the COVID-19 pandemic.  Objective: To analyze data on the first 1510 laboratory-confirmed cases of COVID-19 in Mexico, and to describe the geographical distribution of the disease and its transmission dynamics.  Method: Description of the first COVID-19 cases with real-time RT-PCR-positive test, as well as evaluation of epidemiological measures, cumulative incidence, rate of transmission, and mortality and lethality rates during the 1st month of the epidemic.  Results: Average age was 43 years, and 58% were males; 44% of initial cases were imported. Lethality in the population during the 1st month went from 1.08 to 3.97 per 100 cases; however, the trend is linear and similar to that observed in Europe.  Conclusions: In Mexico, social distancing is being applied, but studies are still required on the dynamics of the epidemic, person-to-person transmission, incidence of subclinical infections, and patient survival.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Coronavirus humano]]></kwd>
<kwd lng="es"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="es"><![CDATA[Infecciones del tracto respiratorio]]></kwd>
<kwd lng="es"><![CDATA[Virus respiratorios]]></kwd>
<kwd lng="en"><![CDATA[Human coronavirus]]></kwd>
<kwd lng="en"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="en"><![CDATA[Respiratory tract infections]]></kwd>
<kwd lng="en"><![CDATA[Respiratory viruses]]></kwd>
</kwd-group>
</article-meta>
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