<?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>2448-8909</journal-id>
<journal-title><![CDATA[Medicina crítica (Colegio Mexicano de Medicina Crítica)]]></journal-title>
<abbrev-journal-title><![CDATA[Med. crít. (Col. Mex. Med. Crít.)]]></abbrev-journal-title>
<issn>2448-8909</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Medicina Crítica A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-89092020000100053</article-id>
<article-id pub-id-type="doi">10.35366/93281</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[SARS-CoV-2 and COVID-19. A pandemic review]]></article-title>
<article-title xml:lang="es"><![CDATA[SARS-CoV-2 y COVID-19. Una revisión de la pandemia]]></article-title>
<article-title xml:lang="pt"><![CDATA[SARS-CoV-2 e COVID-19. Uma revisão da pandemia&#8203;]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Elizalde-González]]></surname>
<given-names><![CDATA[José J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Faculty of Medicine ]]></institution>
<addr-line><![CDATA[ México City]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<volume>34</volume>
<numero>1</numero>
<fpage>53</fpage>
<lpage>67</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-89092020000100053&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-89092020000100053&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-89092020000100053&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: A new danger place all humanity on alert, challenging the best of it to fight the battle; it is the mutation of a new virus SARS-CoV-2, the third to cross barriers in less than two decades to infect humans. Started at the end of the year 2019 apparently in the wholesale seafood and fish market of Wuhan in China, it has spread throughout the globe, seriously affecting Europe and currently the American Continent and putting in check the health systems of all nations with an exponential growth in cases which will soon add more than a million and a half cases worlwide in a short period of time, most of them with active infection, a changing case fatality rate, many unanswered key questions, a substantial risk of nosocomial transmission, a basic reproductive number (R0) greater than 1, and no specific treatment to offer. Intensive care units are expected to receive increasing numbers of critically ill patients never before seen in the modern history of medicine, testing their strength, organization, and responsiveness with imagination, talent, work, dedication, and passion. An attempt is made to make a global review of the subject in order to better focus the problem we are currently facing worldwide, and hopefully, will allow us to ask research questions that are feasible to answer in a more or less short period of time through good randomized and controlled research protocols. Only with collaborative work and applying the scientific method in a shrewd and intelligent way, we can come out ahead of this terrible threat that shows us again how fragile our human nature is and the importance of staying within physiological ranges throughout our life.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Un nuevo peligro pone en alerta a toda la humanidad, retando a lo mejor de la misma para dar la batalla; se trata de la mutación de un nuevo virus el SARS-CoV-2, el tercero que cruza barreras en menos de dos décadas para infectar al ser humano. Iniciado a finales del año 2019 aparentemente en el mercado mayorista de mariscos y pescados de Wuhan en China, se ha extendido por todo el globo afectando seriamente a Europa y actualmente al continente americano y poniendo en jaque a los sistemas de salud de todas las naciones con un crecimiento exponencial de casos que pronto sumarán mundialmente más de un millón y medio en un corto periodo, la mayor parte de ellos con infección activa, un índice de letalidad cambiante, muchas preguntas clave sin contestar, un riesgo sustancial de transmisión nosocomial, un numero reproductivo básico (R0) mayor de 1 y sin un tratamiento específico que ofrecer. Las unidades de terapia intensiva, se espera puedan recibir cantidades crecientes de pacientes graves nunca antes vistas en la historia moderna de la medicina, poniendo a prueba su fuerza, organización y capacidad resolutiva, con imaginación, talento, trabajo, entrega y pasión. Se intenta hacer una revisión global del tema para centrar de mejor manera el problema que enfrentamos actualmente en todo el mundo y esperanzadamente permita plantear preguntas de investigación que sea factible contestar en un periodo más o menos breve a través de buenos protocolos de investigación, randomizados y controlados. Sólo con trabajo colaborativo y aplicando el método científico de manera sagaz e inteligente, podremos salir avantes de esta terrible amenaza que nos vuelve a mostrar lo frágil de nuestra naturaleza humana y la importancia de mantenernos dentro de rangos fisiológicos a lo largo de la vida.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: Um novo perigo coloca toda a humanidade em alerta, desafiando o melhor da mesma a lutar; se trata da mutação de um novo vírus SARS-CoV-2, o terceiro a atravessar barreiras em menos de duas décadas para infectar seres humanos. Iniciado no final do ano de 2019, aparentemente no mercado atacadista de frutos do mar e peixe de Wuhan, na China, espalhou-se por todo o mundo, afetando seriamente a Europa e atualmente o continente americano e controlando os sistemas de saúde de todas as nações com um crescimento exponencial de casos que em breve somaram mundialmente mais de 1.5 milhões em um curto período, a maioria deles com infecção ativa, uma taxa de letalidade variável, muitas perguntas-chave não respondidas, um risco substancial de transmissão nosocomial, um número reprodutivo básico (R0 ) maior a 1 e sem tratamento específico a oferecer. Espera-se que as unidades de terapia intensiva recebam um número crescente de pacientes em estado crítico nunca antes vistos na história moderna da medicina, testando sua força, organização e capacidade de resposta com imaginação, talento, trabalho, dedicação e paixão. É feita uma tentativa de fazer uma revisão global do assunto, a fim de focar melhor o problema que atualmente enfrentamos em todo o mundo e, com sorte, permitir-nos fazer perguntas de pesquisa que sejam possíveis de responder em um período mais ou menos curto por meio de bons protocolos de pesquisa, randomizados e controlados. Somente com o trabalho colaborativo e aplicando o método científico de maneira astuta e inteligente, podemos sair à frente dessa terrível ameaça que nos mostra novamente a fragilidade de nossa natureza humana e a importância de permanecer dentro dos limites fisiológicos ao longo da vida.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[2019-nCoV]]></kwd>
<kwd lng="en"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="en"><![CDATA[coronavirus disease-2019]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[pandemic]]></kwd>
<kwd lng="es"><![CDATA[2019-nCoV]]></kwd>
<kwd lng="es"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="es"><![CDATA[enfermedad por coronavirus-2019]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[pandemia]]></kwd>
<kwd lng="pt"><![CDATA[2019-nCoV]]></kwd>
<kwd lng="pt"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="pt"><![CDATA[doença de Coronavírus-2019]]></kwd>
<kwd lng="pt"><![CDATA[COVID-19]]></kwd>
<kwd lng="pt"><![CDATA[pandemia]]></kwd>
</kwd-group>
</article-meta>
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