was read the article
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2926 "Tamanyo" => 182732 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at0005" "detalle" => "Figure " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Infectious disease e-consultations trend with respect to the total per year.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Carlos Monfort-Vinuesa, Pedro Gil-López, Germán Ramírez-Olivencia, Tomás Chivato-Pérez, David Coca-Benito, Tatiana Mata-Forte" "autores" => array:6 [ 0 => array:2 [ "nombre" => "Carlos" "apellidos" => "Monfort-Vinuesa" ] 1 => array:2 [ "nombre" => "Pedro" "apellidos" => "Gil-López" ] 2 => array:2 [ "nombre" => "Germán" "apellidos" => "Ramírez-Olivencia" ] 3 => array:2 [ "nombre" => "Tomás" "apellidos" => "Chivato-Pérez" ] 4 => array:2 [ "nombre" => "David" "apellidos" => "Coca-Benito" ] 5 => array:2 [ "nombre" => "Tatiana" "apellidos" => "Mata-Forte" ] ] ] ] ] "idiomaDefecto" => "en" "Traduccion" => array:1 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class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 1 => array:3 [ "nombre" => "Juan Manuel" "apellidos" => "González de Abreu" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 2 => array:3 [ "nombre" => "Verónica" "apellidos" => "Pérez-Blanco" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] ] ] 3 => array:3 [ "nombre" => "Rosa" "apellidos" => "de Miguel Buckley" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">c</span>" "identificador" => "aff0015" ] ] ] 4 => array:3 [ "nombre" => "María Pilar" "apellidos" => "Romero Gómez" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">d</span>" "identificador" => "aff0020" ] ] ] 5 => array:4 [ "nombre" => "Marta" "apellidos" => "Díaz-Menéndez" "email" => array:1 [ 0 => "marta.diaz@salud.madrid.org" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">c</span>" "identificador" => "aff0015" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] 6 => array:2 [ "colaborador" => "on behalf of La Paz Health Care Workers Vaccination Study Group" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">◊</span>" "identificador" => "fn0005" ] ] ] ] "afiliaciones" => array:4 [ 0 => array:3 [ "entidad" => "Occupational Health Department, La Paz University Hospital, Madrid, Spain" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Preventive Medicine Department, La Paz University Hospital, Madrid, Spain" "etiqueta" => "b" "identificador" => "aff0010" ] 2 => array:3 [ "entidad" => "Infectious Disease Unit, Internal Medicine Department, La Paz University Hospital, Madrid, Spain" "etiqueta" => "c" "identificador" => "aff0015" ] 3 => array:3 [ "entidad" => "Microbiology Department, La Paz University Hospital, Madrid, Spain" "etiqueta" => "d" "identificador" => "aff0020" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] 1 => array:2 [ "autoresLista" => "" "autores" => array:1 [ 0 => array:1 [ "colaborador" => "Appendix. La Paz Health Care Workers Vaccination Study Group" ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Impacto de la vacuna BNT162b2 de mRNA frente a COVID-19 en personal sanitario español" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0010" "etiqueta" => "Fig. 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1432 "Ancho" => 2508 "Tamanyo" => 248153 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Daily new cases of COVID19 in HCW and 14 days cumulative cases per 100,000 habitants in the Madrid region. Footnote: HCW: Healthcare workers.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">On December 21st, 2020, the European Commission authorized BioNTech and Pfizer's BNT162b2 mRNA Covid-19 vaccine.<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">1</span></a> Spain began vaccinating on Sunday 27th December prioritizing two groups: (1) Residents and staff working in long-term care facilities for the elderly or the highly dependent and (2) frontline staff in the health and social-health care fields.<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Healthcare workers (HCW) are key in this pandemic to ensure the continuous care of the overwhelming numbers of COVID-19 patients. Consequently, frontline HCW have a 3.4-fold higher risk than the general population to become infected.<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">3</span></a> Not only are HCW highly exposed to SARS-CoV-2 due to their professional activity but they are also in close contact with vulnerable patients at high risk of severe COVID-19, which is why this group has been considered a priority for COVID-19 vaccination.<a class="elsevierStyleCrossRefs" href="#bib0060"><span class="elsevierStyleSup">4,5</span></a> Mathematical models support the benefits of frontline HCW vaccination in the reduction of deaths, hospital and ICU admissions from COVID-19.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">6</span></a> However, little is yet known about the effectiveness of these strategies.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">7</span></a></p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Methods</span><p id="par0015" class="elsevierStylePara elsevierViewall">La Paz University Hospital is a 1270-bed hospital with a catchment area of more than 500,000 individuals in the north of Madrid. During the pandemic, the hospital adapted its infrastructure in response to the high caseload, and by 12 February 2021, the hospital had attended 11,021 patients with COVID-19, one of the largest single-center cohorts in Europe.</p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Study design, period and participants</span>: This is a prospective observational study carried out between 01/12/20 and 07/03/21. Our hospital has 7410 employees, which increased to 8329 in response to the high demand for care at the time of the epidemic.</p><p id="par0025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Definitions</span>: Confirmed case was defined as any healthcare worker with positive SARS-CoV-2 nucleic acid in a clinical specimen.</p><p id="par0030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Epidemiological data collection</span>: Data collection was daily carried out by the Occupational Health Department, in order to perform the clinical surveillance of employees. This Department was responsible also for the follow-up COVID-19 contact tracing and screenings, as well as HCW vaccination. Cumulative incidence of Madrid Region was obtained from Public Health weekly reports. Daily cases of total hospitalized COVID-19 patients were obtained from the Preventive Medicine Department records.</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results and discussion</span><p id="par0035" class="elsevierStylePara elsevierViewall">We aimed to compare the incidence and prevalence of HCW infected pre-and post-vaccination with the BNT162b2 mRNA COVID-19 vaccine. The periods of vaccination were from 10/01/21 to 19/01/21 (first dose 7502 HCW) and from 01/02/21 to 09/02/21 (second dose 7423 HCW). For HCW who could not be vaccinated in this period of time (10,9%), a second round of vaccination started on a 17/02/21. <a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a> shows that the curves for the cumulative cases HCW and hospitalized COVID-19 patients paralleled during the so-called “second wave” of the pandemic in Madrid starting 31/08/20, that reached its peak on 31/1/21. <a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2</a> also shows that daily new cases of HCW infections in our hospital were in line with the 14 days cumulative incidence of COVID-19 cases per 100,000 habitants in the Madrid region in this time period.<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">8</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0040" class="elsevierStylePara elsevierViewall">Since approximately two weeks after finishing the first round of vaccinations daily new cases of HCW infections (symptomatic and asymptomatic) decreased substantially and the cumulative cases of infected HCW and hospitalized COVID-19 patients started to diverge (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>). The curve of infected HCW decreased from a maximum of 157 on 23/10/20 to seven on 23/2/21. Daily incidence of new cases of infected HCW reached a maximum of 24 on 18/1/21 and decreased to zero after 16/2/21. This divergence between the prevalence curves is appreciable despite the fact that the 14 days cumulative incidence of COVID-19 cases is at present decreasing in Madrid. Of note, we have not seen any new case of HCW infection after seven days of the second dose of vaccination among the HCW (89% of the total) who have received the two doses of the BNT162b2 mRNA Covid-19 vaccine. Despite the presented data, the limitations of this type of observational study must be taken into account, including the potential for bias in the reporting of symptoms or positive tests.</p><p id="par0045" class="elsevierStylePara elsevierViewall">To the best of our knowledge this is one of the first examples of the high effectiveness of a COVID vaccine in Spanish HCW. We can only hope to see, in the upcoming months, that this impressive benefit is also shared by the general population.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Conflict of interests</span><p id="par0050" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflict of interest.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:9 [ 0 => array:3 [ "identificador" => "xres2007488" "titulo" => "Abstract" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Material and methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec1720061" "titulo" => "Keywords" ] 2 => array:3 [ "identificador" => "xres2007487" "titulo" => "Resumen" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introducción" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Material y métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusión" ] ] ] 3 => array:2 [ "identificador" => "xpalclavsec1720062" "titulo" => "Palabras clave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 5 => array:2 [ "identificador" => "sec0010" "titulo" => "Methods" ] 6 => array:2 [ "identificador" => "sec0015" "titulo" => "Results and discussion" ] 7 => array:2 [ "identificador" => "sec0020" "titulo" => "Conflict of interests" ] 8 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2021-03-31" "fechaAceptado" => "2021-06-15" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1720061" "palabras" => array:4 [ 0 => "Healthcare workers" 1 => "COVID" 2 => "SARS-COV2" 3 => "Vaccine" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec1720062" "palabras" => array:4 [ 0 => "Trabajadores sanitarios" 1 => "COVID" 2 => "SARS-CoV2" 3 => "Vacuna" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Frontline health care workers (HCW) have higher risk than the general population to become infected by SARS.CoV.2, so they were a priority group for Covid-19 vaccine administration. We compared the incidence and prevalence of HCW infected pre-and post-vaccination with the BNT162b2 mRNA COVID-19 vaccine.</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Material and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Prospective observational study carried out between 01/12/20 and 07/03/21 in La Paz University Hospital, Madrid (Spain). SARS.CoV.2 positive cases in HCW after vaccination were collected and compared to those hospitalized COVID-19 patients at the same hospital.</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Two weeks after finishing the first round of vaccinations daily new cases of HCW infections (symptomatic and asymptomatic) decreased substantially and cumulative cases of infected HCW and hospitalized COVID-19 patients started to diverge. No new positive cases of HCW infection were registered seven days after the second dose of BNT162b2 mRNA COVID-19 vaccine.</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">BNT162b2 mRNA COVID-19 vaccine is highly effective in Spanish HCW.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Material and methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] "es" => array:3 [ "titulo" => "Resumen" "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducción</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Los trabajadores sanitarios (TS) de primera línea tienen mayor riesgo de infectarse de SARS-CoV-2 que la población general, por lo que han sido un grupo prioritario para la vacunación frente a COVID-19. Comparamos la incidencia y prevalencia de TS infectados antes y después de la vacunación con BNT162b2 mRNA frente a COVID-19.</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Material y métodos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio prospectivo observacional realizado entre 01 de diciembre de 2021 en el Hospital Universitario La Paz, Madrid, España. Se registraron los casos positivos para SARS-CoV-2 en TS y se compararon con los hospitalizados por COVID-19.</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Dos semanas tras la primera ronda de vacunación las nuevas infecciones en TS (sintomáticas y asintomáticos) disminuyeron sustancialmente y los casos acumulados de TS infectados y pacientes hospitalizados por COVID-19 empezaron a divergir. No hubo nuevas infecciones en TS vacunados a los siete días de la segunda dosis de la vacuna.</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusión</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La vacuna BNT162b2 mRNA frente a SARS-CoV-2 es altamente eficaz en TS españoles.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introducción" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Material y métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusión" ] ] ] ] "NotaPie" => array:1 [ 0 => array:3 [ "etiqueta" => "◊" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">A list of the on behalf of La Paz Health Care Workers Vaccination Study Group 5 members (COVID@HULP Working Group) is provided in the <a class="elsevierStyleCrossRef" href="#sec0025">Appendix</a>.</p>" "identificador" => "fn0005" ] ] "apendice" => array:1 [ 0 => array:1 [ "seccion" => array:1 [ 0 => array:4 [ "apendice" => "<p id="par0055" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Occupational Health Department:</span> Concepción Núñez López, Juan Manuel González, Natalia Arizaga Lobeto, Natalia Pérez Hidalgo, Maria Castiñeiras Ortega, Consuelo Rodrigo Garcia-Pando</p> <p id="par0060" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Preventive Medicine Department:</span> Verónica Pérez-Blanco, Claudia García-Vaz</p> <p id="par0065" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Microbiology Department:</span> Julio García Rodríguez, María Pilar Romero Gómez</p> <p id="par0070" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Internal Medicine Department</span>: Francisco Arnalich Fernández</p> <p id="par0075" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Infectious Disease Unit:</span> Rosa de Miguel Buckley, Marta Díaz-Menéndez, Jose R. Arribas.</p>" "etiqueta" => "Appendix" "titulo" => "La Paz Health Care Workers Vaccination Study Group: Authors and affiliations" "identificador" => "sec0025" ] ] ] ] "multimedia" => array:2 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1626 "Ancho" => 2925 "Tamanyo" => 343078 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Daily new cases of COVID19 hospitalized patients, and daily new cases of infected HCW COVID19 pre-and post-vaccination. Footnote: HCW: healthcare workers.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Fig. 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1432 "Ancho" => 2508 "Tamanyo" => 248153 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Daily new cases of COVID19 in HCW and 14 days cumulative cases per 100,000 habitants in the Madrid region. Footnote: HCW: Healthcare workers.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:8 [ 0 => array:3 [ "identificador" => "bib0045" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "European Medicine Agency. Comirnaty Vaccine: summary of product characteristics. 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