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2.
Washington; Organización Panamericana de la Salud; abr. 7, 2021. 5 p.
Non-conventional in English | LILACS | ID: biblio-1177307

ABSTRACT

En las campañas de vacunación, como en la actual situación de COVID-19, es habitual que los países señalen posibles efectos adversos después de la vacunación. Esto no significa necesariamente que los eventos estén relacionados con la vacunación en sí, pero es necesario investigarlos. También muestra que el sistema de vigilancia funciona y que existen controles efectivos. La Organización Mundial de la Salud (OMS) está en contacto regular con la Agencia Europea de Medicamentos (EMA) y otras autoridades reguladoras del mundo para obtener la información más reciente sobre la seguridad de todas las vacunas para COVID-19.


Subject(s)
Humans , Pneumonia, Viral/immunology , Viral Vaccines/adverse effects , Coronavirus Infections/immunology , Upper Extremity Deep Vein Thrombosis/chemically induced , Pandemics/prevention & control , Betacoronavirus/immunology , Drug Monitoring/adverse effects , Immunization Programs/organization & administration , Europe
3.
Washington; Organización Panamericana de la Salud; mar. 02, 2021. 28 p. ilus.
Non-conventional in English, Spanish, Portuguese | LILACS | ID: biblio-1150961

ABSTRACT

Todos os países do mundo formularam planos de resposta para enfrentar a pandemia da COVID-19. No entanto, os desafios impostos pela doença os obrigam a aprender e adaptar-se constantemente. Cada vez mais é necessário reforçar o componente de comunicação de riscos como uma ferramenta essencial para transmitir à população, da devida forma, todas as informações sobre o processo de imunização, desde os testes clínicos e a produção de novas vacinas, até a adoção, distribuição e priorização dos grupos aos quais serão administradas uma ou mais vacinas ­ dependendo da definição e disponibilidade de cada país ­, bem como sobre o acesso universal às vacinas, após os grupos prioritários terem sido imunizados. A Organização Pan-Americana da Saúde, em seu esforço constante e permanente para apoiar os países das Américas, apresenta este documento para facilitar a formulação de uma estratégia de comunicação de riscos e participação comunitária (CRPC) para a vacinação contra o SARS-CoV-2. O intuito é contribuir para o fortalecimento das capacidades de comunicação e planejamento dos ministérios e secretarias de saúde, bem como de outros órgãos responsáveis pela comunicação na área das novas vacinas contra a COVID-19 nas Américas.


Todos los países del mundo han desarrollado planes de respuesta para enfrentar la pandemia de COVID-19; sin embargo, los desafíos que presenta la enfermedad los obliga a un aprendizaje y a una adaptación constantes. Cada vez es más necesario reforzar el componente de comunicación de riesgos como herramienta esencial para transmitir de forma adecuada a la población toda la información sobre el proceso de inmunización, desde los ensayos clínicos y la producción de nuevas vacunas, hasta la introducción, distribución y priorización de grupos a los que hay que administrar una o varias vacunas ­según la definición y la disponibilidad de cada país­ así como el acceso universal a ellas, una vez inmunizados los grupos prioritarios. La OPS, dentro de su empeño constante por apoyar a los países de las Américas, publica el presente documento con ánimo de facilitar la elaboración de una estrategia de comunicación de riesgos y participación comunitaria para la vacunación contra la COVID-19. Su finalidad es contribuir a fortalecer las capacidades y la planificación de la comunicación de los ministerios o secretarías de salud, así como de otros organismos encargados de comunicar en el área de las nuevas vacunas contra la COVID-19 en las Américas.


All countries around the world have developed response plans to tackle the COVID-19 pandemic. However, the challenges presented by the disease require constant learning and adaptation. It is increasingly necessary to strengthen the risk communication component as an essential tool for providing the population with all of the necessary information about the immunization process. This ranges from clinical trials and the production of new vaccines to the introduction, distribution, and prioritization of groups that need one or more vaccines­according to each country's definitions and vaccine availability. It also includes universal access to vaccines, once the priority groups have been immunized. PAHO, in its constant, ongoing effort to support the countries of the Americas, is making this document available to facilitate the preparation of a risk communication and community engagement strategy for vaccination against COVID-19. Its goal is to help to strengthen the communication and planning capacities of the ministries or secretariats of health and other agencies in charge of communicating about new COVID-19 vaccines in the Americas.


Subject(s)
Humans , Pneumonia, Viral/immunology , Viral Vaccines/immunology , Immunization Programs/organization & administration , Coronavirus Infections/immunology , Health Communication , Pandemics/prevention & control , Betacoronavirus/immunology
4.
Ciudad de Guatemala; s.n; 5 feb. 2021. 35 p. tab, ilus.
Non-conventional in Spanish | LILACS, LIGCSA | ID: biblio-1179867

ABSTRACT

Para facilitar la introducción de la vacuna contra la COVID-19 el Ministerio de Salud Pblica y Asistencia Social (MSPAS) estableció el Comité Nacional de Coordinación para Vacunación contra COVID-19 (CNVCOVID) a través del Acuerdo Ministerial No 0262-2020, con la finalidad de desarrollar e implementar el plan estratégico nacional de vacunación contra la COVID-19. Este documento representa ese producto, en el cual se integran y describen los componentes esenciales para el despliegue de la vacunación contra la COVID-19 el cual se actualizará periódicamente, a medida que se obtenga información actualizada, científica, legal y técnico-operativa para fortalecer la estrategia de vacunación contra la COVID-19 en Guatemala


Subject(s)
Pneumonia, Viral/immunology , Viral Vaccines/supply & distribution , Coronavirus Infections/immunology , SARS Virus/immunology , Pandemics/prevention & control , Health Policy , Viral Vaccines/standards , Guatemala
5.
Washington; Organización Panamericana de la Salud; feb. 22, 2021. 14 p.
Non-conventional in English, Spanish | LILACS | ID: biblio-1150948

ABSTRACT

El propósito de estas orientaciones es apoyar el desarrollo de un sistema regional de vigilancia de ESAVI y AESI sensible, oportuno, estandarizado, confiable e integrado, con la participación de todos los actores involucrados en la vacunación segura, con vistas a mantener la confianza en la vacunación y la aceptación de la inmunización en las Américas. El sistema contribuirá a la detección temprana y a la clasificación adecuada de los ESAVI graves y de las señales de riesgo, para generar una respuesta rápida y apropiada a nivel nacional y regional.


The purpose of tthis guidance document is to develop a sensitive, timely, standardized, reliable, and integrated regional AEFI surveillance system with the participation of all actors involved in safe vaccination to maintain trust in vaccination and acceptance of immunization in the Americas. Contribute to the early detection and correct classification of serious AEFIs and risk markers to generate a rapid and appropriate national and regional response.


Subject(s)
Humans , Pneumonia, Viral/immunology , Viral Vaccines/immunology , Immunization Programs/organization & administration , Coronavirus Infections/immunology , Pandemics/prevention & control , Betacoronavirus/immunology
6.
Washington; Organización Panamericana de la Salud; feb. 11, 2021. 38 p. ilus..
Non-conventional in English, Spanish, Portuguese, French | LILACS | ID: biblio-1150956

ABSTRACT

El Grupo Técnico Asesor (GTA) sobre Enfermedades Prevenibles por Vacunación de la Organización Panamericana de la Salud (OPS) celebró su sexta reunión ad hoc de manera virtual el 16 de noviembre del 2020, para dar seguimiento a la última reunión ad hoc celebrada tres meses antes de manera virtual sobre la pandemia de COVID-19. Los objetivos específicos de la reunión fueron proporcionar una actualización sobre la situación epidemiológica relacionada con la COVID-19 y su repercusión sobre los programas nacionales de inmunización en la Región de las Américas; examinar las recomendaciones del Grupo de Expertos en Asesoramiento Estratégico sobre Inmunización (SAGE) de la OMS con respecto al marco de valores y la hoja de ruta para la asignación de prioridades para la vacunación contra la COVID-19 en un contexto de suministros limitados; poner al corriente a los participantes de los progresos logrados mediante los componentes de la planificación para la introducción de las vacunas contra la COVID-19, y tratar las actividades clave prioritarias para apoyar a los países de la Región.


PAHO's Technical Advisory Group (TAG) on Vaccine-preventable Diseases held its sixth ad-hoc virtual meeting on 16 November 2020, to follow-up on the last ad-hoc virtual meeting held 3 months prior on the COVID-19 pandemic. The specific objectives of the meeting were to provide an epidemiological update on COVID-19 and its impact on national immunization programs (NIPs) in the Americas; review recommendations from WHO's Strategic Advisory Group of Experts (SAGE) on immunization regarding the value framework and roadmap for prioritizing the use of COVID-19 vaccines in the context of limited supply; update participants on the progress made through planning components for the introduction of COVID-19 vaccines; and discuss key priority activities to support countries in the Region.


O Grupo Técnico Assessor (GTA) da OPAS em Doenças Imunopreveníveis realizou sua sexta reunião ad hoc virtual em 16 de novembro de 2020 em prosseguimento à reunião anterior sobre a pandemia de COVID-19 realizada havia 3 meses. A reunião teve como objetivos específicos: apresentar uma atualização epidemiológica da COVID-19 e seu impacto nos programas nacionais de imunizações nas Américas; examinar as recomendações do Grupo Consultivo Estratégico de Especialistas em Imunização (SAGE) da OMS em imunização do modelo de valores e guia para priorização do uso das vacinas contra COVID-19 diante do suprimento limitado; informar aos participantes o progresso obtido nos componentes do planejamento para a introdução das vacinas e debater as medidas prioritárias de apoio aos países na Região.


Le Groupe consultatif technique (GCT) de l'OPS sur les maladies évitables par la vaccination a tenu sa sixième réunion virtuelle spéciale le 16 novembre 2020 pour donner suite à la dernière réunion virtuelle spéciale tenue trois mois avant la pandémie de COVID-19. Les objectifs propres à cette réunion étaient de fournir une mise à jour épidémiologique concernant la COVID-19 et ses répercussions sur les programmes nationaux de vaccination dans les Amériques, d'examiner les recommandations du Groupe consultatif stratégique d'experts (SAGE) de l'OMS sur la vaccination relativement au cadre de valeurs et à la feuille de route visant à définir des groupes prioritaires pour l'utilisation des vaccins anti-COVID-19 dans un contexte d'offre limitée, d'informer les participants sur les derniers progrès réalisés via des éléments de planification de l'introduction des vaccins anti-COVID-19 et de discuter des principales activités prioritaires pour soutenir les pays de la Région.


Subject(s)
Humans , Male , Female , Pneumonia, Viral/immunology , Pneumonia, Viral/epidemiology , Immunization Programs/organization & administration , Coronavirus Infections/immunology , Coronavirus Infections/epidemiology , Pandemics/prevention & control , Epidemiological Monitoring , Betacoronavirus/immunology , Pan American Health Organization/organization & administration
7.
Washington; Organización Panamericana de la Salud; feb. 06, 2021. 12 p. tab..
Non-conventional in English, Spanish, Portuguese | LILACS | ID: biblio-1150955

ABSTRACT

Los interrogantes sobre la eficacia y la seguridad de las vacunas se encuentran entre las preguntas relacionadas con la vacunación que más a menudo se plantean. Esta tercera edición de Preguntas frecuentes sobre las vacunas experimentales contra la COVID-19 y los mecanismos de acceso ofrece respuestas a estas y otras preguntas. Asimismo, el documento explica las diferentes fases por las que pasa una vacuna antes de obtener aprobación y facilita información sobre las vacunas experimentales y la vacunación contra la COVID-19.


Will COVID-19 vaccines be safe? Will all the COVID-19 candidate vaccines be successful? What are the different phases a vaccine must go through to be approved? This document provides responses to the most frequently asked questions about candidate vaccines and access to COVID-19 vaccination.


Existe uma vacina contra a COVID-19? Todas as vacinas candidatas contra a COVID-19 serão bem-sucedidas? Quais são as diferentes fases que uma vacina deve passar para ser aprovada? Este documento responde às perguntas mais frequentes sbre as vacinas experimentais e os mecanismos de acesso disponíveis em cada país.


Subject(s)
Humans , Pneumonia, Viral/immunology , Viral Vaccines/immunology , Immunization Programs/organization & administration , Coronavirus Infections/immunology , Pandemics/prevention & control , Betacoronavirus/immunology
8.
Washington; Organización Panamericana de la Salud; ene. 19, 2021. 4 p.
Non-conventional in English, Spanish | LILACS | ID: biblio-1150953

ABSTRACT

Como trabajador de salud, ¿cuál es mi función en la introducción de las vacunas contra la COVID-19? ¿Cómo debo responder si los pacientes me hacen preguntas sobre las vacunas contra la COVID­19? Este documento está dirigido a los trabajadores y trabajadoras de salud que participen en los programas de vacunación contra la COVID-19 y ofrece respuestas a las preguntas más frecuentes sobre las vacunas contra la enfermedad.


As a healthcare worker, what is my role in COVID-19 vaccine introduction? How should I respond if people ask me questions about COVID-19 vaccines? This document is addressed to healthcare workers involved in the COVID-19 immunization program and contains answers to the most common questions about COVID-19 vaccines.


Subject(s)
Humans , Pneumonia, Viral/immunology , Viral Vaccines/immunology , Health Personnel/education , Immunization Programs/organization & administration , Coronavirus Infections/immunology , Pandemics/prevention & control , Betacoronavirus/immunology
11.
Rev. Hosp. Ital. B. Aires (2004) ; 40(4): 233-236, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1145604

ABSTRACT

Entre el 1 y el 26 de junio se llevó a cabo el estudio de investigación "Encuesta de infección por coronavirus tipo 2 del síndrome respiratorio agudo grave (SARS-CoV-2), nivel comunitario en habitantes de un barrio vulnerable urbano de la ciudad de Buenos Aires", que determinó que un 54,3% de los habitantes del barrio presentaban anticuerpos inmunoglobulina tipo G para SARS-CoV-2. El objetivo de este artículo es proporcionar un ejemplo de un muestreo probabilístico que fue utilizado para estimar la prevalencia de seropositividad en este estudio. (AU)


Between 1st and 26th of june, a research named "Survey of infection by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), community level in inhabitants of a marginal urban neighborhood of the city of Buenos Aires" was carried on. The study showed that 54.3% of the that 54.3% of the people of the neighborhood had antibodies immunoglobulin type G for SARS-CoV-2. The objective of this article is to provide an example of a probability sampling carried out in the study, to measuring the prevalence of seropositivity. (AU)


Subject(s)
Humans , Pneumonia, Viral/epidemiology , Health Surveys/statistics & numerical data , Coronavirus Infections/epidemiology , Argentina , Pneumonia, Viral/immunology , Seroepidemiologic Studies , Simple Random Sampling , Prevalence , Coronavirus Infections/immunology , Betacoronavirus/immunology
12.
Actual. osteol ; 16(2): [116]-[131], mayo.-ago. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1129745

ABSTRACT

"Los coronavirus pertenecen a una gran familia de virus (Coronaviridae) que infectan aves y varios mamíferos. El coronavirus actualmente denominado SARS-CoV-2, fue descubierto en diciembre de 2019 en Wuhan, provincia de Hubei, China, y es el agente causal de la epidemia de neumonía atípica actual" (COVID-19; Coronavirus Disease 2019). Los casos más graves presentan un síndrome de dificultad respiratoria aguda que puede conducir a la muerte. La vitamina D (VD), además del efecto bien conocido y positivo sobre la salud ósea y la homeostasis del calcio, tiene efecto pleiotrópico en varios órganos, con distribución casi universal del receptor de VD y de las enzimas de metabolización de 25 hidroxivitamina D (25OHD) en las células del organismo. Estas acciones extraesqueléticas dependen de la síntesis en dichas células del metabolito activo 1,25 dihidroxivitamina D por regulación paracrina y autocrina, dependiente de niveles circulantes óptimos de 25OHD. Por sus acciones inmunomoduladora, antiinflamatoria, antimicrobiana, reguladora del sistema renina-angiotensina-aldosterona, favorecedora de la indemnidad del epitelio respiratorio y la homeostasis redox celular, la VD podría tener efecto protector en la infección por COVID-19. Entre los grupos de riesgo para COVID-19 figuran los adultos mayores, obesos, diabéticos, hipertensos, con afecciones cardiovasculares, patologías con mayor incidencia en individuos con hipovitaminosis VD. La suplementación con VD, para alcanzar niveles óptimos de 25OHD de 40-60 ng/ml, podría reducir la incidencia, severidad y riesgo de muerte en la actual pandemia por COVID-19, como medida complementaria mientras se desarrollan la vacuna y otras medicaciones específicas. (AU)


Coronaviruses belong to a large family of viruses (Coronaviridae) that infect birds and various mammals. The novel coronavirus currently known as SARS-CoV-2 was discovered in December 2019 in Wuhan, Hubei province, China and is the causal agent of the current atypical pneumonia epidemic (COVID-19: Coronavirus Disease 2019); The most severe cases present with acute respiratory distress syndrome that can lead to death. Vitamin D (VD) has a pleiotropic effect on several organs, in addition to its wellknown and positive effect on bone health and calcium homeostasis, with an almost universal distribution of the VD receptor and the metabolites of 25hydroxyvitamin D (25OHD) in all cells of the body. These extra-skeletal actions depend on the synthesis of the active metabolite 1,25dihydroxyvitamin D in the cells depending on the optimal circulating levels of 25OHD and though paracrine and autocrine regulation. Due to its immunomodulatory, anti-inflammatory, antimicrobial, and regulatory actions on the renin angiotensin aldosterone system, which favors the compensation of the respiratory epithelium and cellular redox homeostasis, the VD could have a protective effect on COVID-19 infection. Among the risk groups for COVID-19 are obese, diabetic, and hypertensive patients, subjects with cardiovascular conditions, and elderly people. All these pathologies show a higher incidence in individuals with VD hypovitaminosis. VD supplementation, to achieve optimal 25OHD levels of 40-60 ng/ml, could reduce the incidence, severity, and risk of death in the current COVID-19 pandemic, as a complementary measure while the vaccine and other specific therapies are being developed. (AU)


Subject(s)
Humans , Pneumonia, Viral/prevention & control , Vitamin D/immunology , Coronavirus Infections/prevention & control , Pneumonia, Viral/immunology , Vitamin D/administration & dosage , Vitamin D/biosynthesis , Vitamin D/physiology , Vitamin D/therapeutic use , Vitamin D Deficiency/complications , Calcifediol/biosynthesis , Coronavirus Infections/immunology , Pandemics , Betacoronavirus
13.
Rev. Assoc. Med. Bras. (1992) ; 66(6): 746-751, June 2020. tab, graf
Article in English | SES-SP, LILACS, SES-SP | ID: biblio-1136276

ABSTRACT

SUMMARY OBJECTIVE The present study aimed to investigate the role of neutrophil/lymphocyte ratio (NLR), an inflammation marker, complete blood count, and biochemical parameters in the diagnosis of COVID-19. METHODS A total of 80 patients who had been hospitalized in the internal medicine clinic were enrolled in the study. The cases were allocated into two groups, i.e., COVID (+) and (-), based on real-time reverse transcription-polymerase chain reaction. The demographic, clinical, and laboratory [NLR, platelet/lymphocyte ratio (PLR), complete blood count, biochemistry, and serology] data of the patients were retrospectively obtained from the hospital data management system. RESULTS NLR and fever levels were found to be higher in COVID-19 (+) cases (P=0.021, P=0.001, respectively). There was no difference between males and females with regard to COVID-19 positivity (P=0.527). Total bilirubin levels were found to be lower in COVID-19 (+) cases (P=0.040). When the ROC analysis was carried out for NLR in COVID-19 (+) cases, the AUC value was found to be 0.660 (P=0.021), sensitivity as 69.01 %, specificity as 65.40 %, LR+: 1.98 and LR- : 0.48, PPV: 80.43, and NPV: 50.00, when the NLR was ≥2.4. The risk of COVID-19 was found to be 20.3-fold greater when NLR was ≥ 2.4 in the logistic regression (P=0.007). CONCLUSION NLR is an independent predictor for the diagnosis of COVID-19. We also found that fever and total bilirubin measurements could be useful for the diagnosis of COVID-19 in this population.


RESUMO OBJETIVO O objetivo do presente estudo foi investigar o papel da razão neutrófilos/linfócitos (RNL), um marcador de inflamação, hemograma completo e parâmetros bioquímicos no diagnóstico de COVID-19. MÉTODOS Um total de 80 pacientes internados na clínica médica foram incluídos no estudo. Os casos foram alocados em dois grupos, COVID (+) e (-), de acordo com a reação em cadeia da polimerase com transcrição reversa em tempo real. Os dados demográficos, clínicos e laboratoriais [NLR, relação plaquetas / linfócitos (PLR), hemograma completo, bioquímica e sorologia]) dos pacientes foram obtidos retrospectivamente no sistema de gerenciamento de dados hospitalares. RESULTADOS Os níveis de NLR e febre foram maiores nos casos de COVID-19 (+) (P = 0,021, P = 0,001,respectivamente). Não houve diferença entre homens e mulheres em relação à positividade para COVID-19 (P = 0,527). Os níveis totais de bilirrubina foram menores nos casos de COVID-19 (+) (P = 0,040). Quando a análise ROC foi realizada para NLR nos casos COVID-19 (+), o valor da AUC foi de 0,660 (P = 0,021), sensibilidade 69,01%, especificidade 65,40%, LR +: 1,98 e LR-: 0,48 , PPV: 80,43 e NPV: 50,00 quando o NLR era> 2,4. The risk of COVID-19 was found to be 20.3-fold greater when NLR was ≥ 2.4 in the logistic regression (P=0.007). CONCLUSÃO NLR é um preditor independente para o diagnóstico de COVID-19. Também concluímos que aferições de febre e bilirrubina total podem ser úteis para o diagnóstico de COVID-19 nesta população.


Subject(s)
Humans , Male , Female , Pneumonia, Viral/diagnosis , Pneumonia, Viral/immunology , Lymphocytes , Coronavirus Infections/diagnosis , Coronavirus Infections/immunology , Coronavirus , Pandemics , Neutrophils , Prognosis , Retrospective Studies , Coronavirus Infections , Betacoronavirus
14.
Adv Rheumatol ; 60: 50, 2020. graf
Article in English | LILACS | ID: biblio-1130788

ABSTRACT

Abstract The COVID-19 outbreak caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global major concern. In this review, we addressed a theoretical model on immunopathogenesis associated with severe COVID-19, based on the current literature of SARS-CoV-2 and other epidemic pathogenic coronaviruses, such as SARS and MERS. Several studies have suggested that immune dysregulation and hyperinflammatory response induced by SARS-CoV-2 are more involved in disease severity than the virus itself. Immune dysregulation due to COVID-19 is characterized by delayed and impaired interferon response, lymphocyte exhaustion and cytokine storm that ultimately lead to diffuse lung tissue damage and posterior thrombotic phenomena. Considering there is a lack of clinical evidence provided by randomized clinical trials, the knowledge about SARS- CoV-2 disease pathogenesis and immune response is a cornerstone to develop rationale-based clinical therapeutic strategies. In this narrative review, the authors aimed to describe the immunopathogenesis of severe forms of COVID-19.(AU)


Subject(s)
Humans , Pneumonia, Viral/immunology , Coronavirus Infections/immunology , Betacoronavirus/drug effects , Thrombosis/etiology , Cytokines/adverse effects
16.
Rev. saúde pública (Online) ; 54: 69, 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1127233

ABSTRACT

ABSTRACT OBJECTIVE To estimate the seroprevalence of antibodies to SARS-CoV-2 among blood donors in the state of Rio de Janeiro, Brazil. METHODS Data were collected on 2,857 blood donors from April 14 to 27, 2020. This study reports crude prevalence of antibodies to SARS-CoV-2, population weighted prevalence for the state, and prevalence adjusted for test sensitivity and specificity. Logistic regression models were used to establish the correlates of SARS-CoV-2 prevalence. For the analysis, we considered collection period and site, sociodemographic characteristics, and place of residence. RESULTS The proportion of positive tests for SARS-Cov-2, without any adjustment, was 4.0% (95%CI 3.3-4.7%), and the weighted prevalence was 3.8% (95%CI 3.1-4.5%). We found lower estimates after adjusting for test sensitivity and specificity: 3.6% (95%CI 2.7-4.4%) for the non-weighted prevalence, and 3.3% (95%CI 2.6-4.1%) for the weighted prevalence. Collection period was the variable most significantly associated with crude prevalence: the later the period, the higher the prevalence. Regarding sociodemographic characteristics, the younger the blood donor, the higher the prevalence, and the lower the education level, the higher the odds of testing positive for SARS-Cov-2 antibody. We found similar results for weighted prevalence. CONCLUSIONS Our findings comply with some basic premises: the increasing trend over time, as the epidemic curve in the state is still on the rise; and the higher prevalence among both the youngest, for moving around more than older age groups, and the less educated, for encountering more difficulties in following social distancing recommendations. Despite the study limitations, we may infer that Rio de Janeiro is far from reaching the required levels of herd immunity against SARS-CoV-2.


Subject(s)
Humans , Male , Female , Adult , Aged , Young Adult , Pneumonia, Viral/immunology , Blood Donors/statistics & numerical data , Coronavirus Infections/immunology , Betacoronavirus/immunology , Antibodies, Viral/blood , Pneumonia, Viral/blood , Pneumonia, Viral/epidemiology , Brazil/epidemiology , Immunoglobulin G/blood , Immunoglobulin M/blood , Seroepidemiologic Studies , Prevalence , Cross-Sectional Studies , Regression Analysis , Sensitivity and Specificity , Coronavirus Infections/blood , Coronavirus Infections/epidemiology , Pandemics , SARS-CoV-2 , COVID-19 , Middle Aged
17.
Int. j. odontostomatol. (Print) ; 14(3): 331-337, 2020. graf
Article in Spanish | LILACS | ID: biblio-1114902

ABSTRACT

A fines de diciembre de 2019, un nuevo coronavirus (SARS-CoV-2) fue identificado como el agente causal de una nueva enfermedad respiratoria llamada COVID-19 por la OMS. Sus síntomas incluyen fiebre, tos seca y dificultad respiratoria. Estos síntomas en general son leves, aunque, pueden ser fatales en adultos mayores y pacientes con comorbilidades. Se realizó búsqueda bibliográfica en Pubmed y Clinical Key donde se seleccionaron 22 artículos de acuerdo con los criterios de inclusión. SARS-CoV-2 pertenece al género de los Betacoronavirus y tiene similitudes genómicas con SARS-CoV y MERS-CoV. El virión de SARS-CoV-2 consta de una nucleocápside y de una envoltura externa compuesta por proteínas estructurales principales y accesorias. Su material genético consiste en una cadena de RNA monocatenario de polaridad positiva, en el que, se codifican proteínas importantes para su transcripción y replicación. El mecanismo de infección de SARS-CoV-2 comienza con la unión del virión a un receptor (ACE2) de la célula huésped y su posterior entrada por endocitosis. El genoma RNA viral se libera al citoplasma donde se transcriben y se traducen las proteínas necesarias para la producción de las proteínas estructurales y para la replicación de su material genético. Posteriormente, el RNA replicado se asocia con la nucleocápside y se ensambla junto con las proteínas estructurales para conformar las partículas víricas que serán liberadas de la célula infectada. El sistema inmune hace frente a la infección viral mediante el reconocimiento de patrones moleculares asociados a patógenos (PAMPs) por parte de la inmunidad innata y por la acción de los linfocitos T y B por parte de la inmunidad humoral. El conocimiento de las bases genéticas y moleculares de SARS-CoV-2 permite visualizar la posibilidad de establecer tratamientos farmacológicos o desarrollo de vacunas para controlar y disminuir los efectos patogénicos de la enfermedad.


In late December 2019, a new coronavirus (SARS-CoV-2) was identified as a causative agent of a new respiratory disease called COVID-19 by WHO. Its symptoms include fever, dry cough, and shortness of breath. Generally, these symptoms are mild, although, can be fatal in older adults and patients with comorbidities. A bibliographic search was carried out in Pubmed and Clinical Key. 22 articles were selected according to inclusion criteria. SARS-CoV-2 belongs to the genus of Betacoronaviruses and has genomic similarities to SARS-CoV and MERS-CoV. SARS-CoV-2 virion is made up of a nucleocapsid and external envelope composed of main structural and accesory proteins. Its genetic is a positive sense single stranded RNA in which important proteins are encoded for their transcription and replication. The mechanism of SARS-CoV-2 infection begins with the binding of the virion to (ACE2) receptor of the host cell and subsequent entry by endocytosis. This RNA genome is released into cytoplasm and the necessary proteins for the production of structural proteins and the replication of genetic material are transcribed and translated. Then, the replicated RNA associates with the nucleocapsid and assembles together with the structural proteins to form the viral particles that will be released from the infected cell. The immune system faces viral infection through the recognition of molecular patterns associated with pathogens (PAMPs) by innate immunity and the action of T cells and B cells by humoral immunity. Knowledge of the genetic and molecular basis of SARS-CoV-2 allows us to visualize the possibility of establishing pharmacological or vaccine treatments to control and reduce the pathogenic effects of the disease.


Subject(s)
Humans , Pneumonia, Viral/transmission , Coronavirus Infections/transmission , Pandemics , Betacoronavirus/genetics , Betacoronavirus/pathogenicity , Pneumonia, Viral/genetics , Pneumonia, Viral/immunology , Coronavirus Infections/genetics , Coronavirus Infections/immunology , Immunity, Humoral , Betacoronavirus/physiology , Immunity, Innate
19.
Braz. oral res. (Online) ; 34: e048, 2020.
Article in English | LILACS, BBO | ID: biblio-1132664

ABSTRACT

Abstract In less than four months, an unprecedented pandemic changed the world scenario, closing institutions and commerce, paralyzing sports championships, blocking frontiers, and putting almost all populations in a house quarantine regimen. Immunocompromised patients are within the high-risk group to severe outcomes from COVID-19. However, there is no clear evidence of the association between impaired immune host status and complications from SARS-CoV-2 infection so far. The virus is transmitted by inhalation or direct contact with infected secretions, and therefore the dental office is a highly susceptible environment for such transmission. Here, we review the literature and discuss immunological COVID-19 related issues. We also make suggestions for immunocompromised patients' support in this new emerging context of clinical dental practice. Until comprehensive findings are published, individuals with impaired immunity should be considered as high-risk. Cross infection control procedures for the clinical care of immunocompromised patients should follow the same guidelines that are being proposed for immunocompetent ones. However, during the active outbreak, people under immunosuppressive conditions should not receive elective procedures, even if they do not have symptoms or exposure history to COVID-19, and in case of emergence, care must be done in a separate airborne room. In the pos-pandemic phase, the dental care general recommendations should be the same for all subjects. Changes in the current guidelines have been proposed to SARS-CoV-2 infection control in order to provide the best and safe dental practice. However, they still need to be validated by future studies.


Subject(s)
Humans , Pneumonia, Viral/immunology , Dental Care/standards , Immunocompromised Host/immunology , Coronavirus Infections/immunology , Betacoronavirus , Pneumonia, Viral/transmission , Pneumonia, Viral/virology , Coronavirus Infections/transmission , Coronavirus Infections/virology , Dental Offices , Air Microbiology/standards , Pandemics , SARS-CoV-2 , COVID-19
20.
Rev. Col. Bras. Cir ; 47: e20202634, 2020. tab
Article in English | LILACS | ID: biblio-1136609

ABSTRACT

ABSTRACT SARS-CoV-2 is a novel virus which has proven to be highly contagious. Specific viral dynamics and immune response to the virus are yet to be fully defined and determining the sensitivity and specificity of the available testing methods is still a work in progress. This study examines the published information on the testing methods, and finds that yield of COVID-19 tests changes with specimen types and with time through course of illness. We propose a sequential battery of testing consisting of an epidemiologic survey, RT-PCR tests, serologic tests and chest CT on surgical candidates which may increase the negative predictive value, and facilitate surgical procedures.


RESUMO O SARS-CoV-2 é um novo vírus que provou ser altamente contagioso. A dinâmica viral específica e a resposta imunológica ao vírus ainda não foram totalmente definidas e a determinação da sensibilidade e especificidade dos métodos de teste disponíveis ainda está em andamento. Este estudo examina as informações publicadas sobre os métodos de testagem e conclui que o rendimento dos testes COVID-19 muda de acordo com o tipo de amostra e com o tempo de progressão da doença. Propomos uma bateria sequencial de testes, que consiste em um levantamento epidemiológico, testes de RT-PCR, testes sorológicos e tomografia computadorizada de tórax em candidatos a cirurgia, que podem aumentar o valor preditivo negativo e facilitar procedimentos cirúrgicos.


Subject(s)
Humans , Pneumonia, Viral/diagnosis , Elective Surgical Procedures , Coronavirus Infections/diagnosis , Pneumonia, Viral/immunology , Predictive Value of Tests , Virus Shedding , Coronavirus Infections/immunology , Clinical Laboratory Techniques , Pandemics , Betacoronavirus , COVID-19 Testing , SARS-CoV-2 , COVID-19 , Antibody Formation
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