Vigilância e soroprevalência: Avaliação de anticorpos IgG para SARS-Cov2 por ELISA no Bairro vulnerável de Villa Azul, Quilmes, Província de Buenos Aires, Argentina

Objective: To evaluate the prevalence of antibodies against SARS Cov-2 in Barrio Villa Azul, in the Quilmes district, together with other demographic and mobility variables. Methods: Descriptive cross-sectional study carried out through a systematic probabilistic sample. The sample consisted of 311 cases, of which 284 cases consented to the application of the test. A survey was applied to 100% of the cases tested. The information was processed with SPSS 23 software and the analysis considered the weighting of the sample according to the established probabilistic design. Results: 61% were women. The mean age was 40 years, the population structure was similar to that of the universe. The presence of antibodies was 14.8% of the cases, the majority in women and 40 year-old who did not go to work and did not use public transport. Being a health worker did not represent a greater risk for infection. It is observed that of each symptomatic case there would be 1.2 asymptomatic. Conclusions: There was a higher prevalence of people with antibodies than in other studies, although comparing similar territories the prevalence of antibodies was lower and this could be a consequence of a timely territorial approach. The seroprevalence was predominantly in women and this would not indicate greater contagion in this sex since there is uncertainty in the relationship between infection and antibodies. It was observed that the infections could have been within the home or in the community environment since it affected people who did not go out to work.Objetivo: Evaluar la prevalencia de anticuerpos para SARS Cov-2 en el Barrio Villa Azul, del partido de Quilmes, junto con otras variables demográficas y de movilidad. Métodos: Estudio descriptivo de corte transversal realizado a través de una muestra probabilística sistemática. El tamaño de la muestra fue de 311 casos y consintieron la aplicación del test 284 casos. Fue aplicada una encuesta al 100% de los casos testeados. La información fue procesada con software SPSS 23 y los análisis consideraron la ponderación de la muestra de acuerdo al diseño equiprobabilístico establecido. Resultados: El 61% eran mujeres. La media de edad era de 40 años, la estructura poblacional era similar a la del universo. La presencia de anticuerpos fue del 14,8% de los casos, la mayoría en mujeres y de 40 años que no salieron a trabajar y no utilizaron transporte público. El ser trabajador de la salud no representó un riesgo acrecentado para el contagio. Se observa que de cada un caso sintomático existirían 1,2 asintomáticos. Conclusiones: Hubo una prevalencia mayor de personas con anticuerpos que en otros estudios, aunque comparando territorios similares la prevalencia de anticuerpos fue menor y esto pude ser una consecuencia de un abordaje territorial oportuno. La seroprevalencia fue predominantemente en mujeres y esto no indicaría mayor contagio en este sexo ya que existe incertidumbre en la relación entre infección y anticuerpos. Se observó que los contagios podrían haber sido dentro del hogar o el entorno comunitario ya que afectó a personas que no salían a trabajar.Objetivo: Avaliar a prevalência de anticorpos para SARS-cOV2 no bairro Villa Azul do Município de Quilmes na Argentina. Métodos: Estudo descritivo de corte transversal realizado a partir de uma amostra probabilística sistemática. O tamanho da amostra foi de 311 casos sendo que aceitaram a realização da prova 248 casos. Foi aplicado um formulário a todos os casos testados. A informação foi processada com o software SPSS 23 e as análises tomaram em conta a ponderação da amostra de acordo ao desenho probabilístico estabelecido. Resultados: O 61% eram mulheres. A média de idade foi de 40 anos, a estrutura populacional era similar à do universo de estudo. A presença de anticorpos foi no 14,8% dos casos, maioria mulheres, de 40 anos e que não saíram para o trabalho e a maioria não usaram o transporte público. O fato de ser trabalhador da saúde não acrescentou o risco do contagio. Observou-se que por cada caso sintomático houveram 1,2 casos assintomáticos. Conclusões: Houve uma prevalência maior de anticorpos do que em outros estudos. A soroprevalência foi maior em mulheres e isto não estaria indicando maior contagio em este sexo devido à incerteza entre a relação entre infeção e anticorpos. Observou-se que os contágios poderiam ter acontecido dentro do lar e no entorno comunitário já que afetou ás pessoas que não saiam para trabalha

Risk factors for COVID-19 mortality: The effect of convalescent plasma administration

Background: Convalescent plasma, widely utilized in viral infections that induce neutralizing antibodies, has been proposed for COVID-19, and preliminary evidence shows that it might have beneficial effect. Our objective was to determine the risk factors for 28-days mortality in patients who received convalescent plasma for COVID-19 compared to those who did not, who were admitted to hospitals in Buenos Aires Province, Argentina, throughout the pandemic. Methods: This is a multicenter, retrospective cohort study of 2-month duration beginning on June 1, 2020, including unselected, consecutive adult patients with diagnosed COVID-19, admitted to 215 hospitals with pneumonia. Epidemiological and clinical variables were registered in the Provincial Hospital Bed Management System. Convalescent plasma was supplied as part of a centralized, expanded access program. Results: We analyzed 3,529 patients with pneumonia, predominantly male, aged 62±17, with arterial hypertension and diabetes as main comorbidities; 51.4% were admitted to the ward, 27.1% to the Intensive Care Unit (ICU), and 21.7% to the ICU with mechanical ventilation requirement (ICU-MV). 28-day mortality was 34.9%; and was 26.3%, 30.1% and 61.4% for ward, ICU and ICU-MV patients. Convalescent plasma was administered to 868 patients (24.6%); their 28-day mortality was significantly lower (25.5% vs. 38.0%, p<0.001). No major adverse effects occurred. Logistic regression analysis identified age, ICU admission with and without MV requirement, diabetes, and preexistent cardiovascular disease as independent predictors of 28-day mortality, whereas convalescent plasma administration acted as a protective factor. Conclusions: Our study suggests that the administration of convalescent plasma in COVID-19 pneumonia admitted to the hospital might be associated with improved outcomes.Facultad de Ciencias Médica

Effectiveness of the first component of Gam-COVID-Vac (Sputnik V) on reduction of SARS-CoV-2 confirmed infections, hospitalisations and mortality in patients aged 60-79: a retrospective cohort study in Argentina

Background A first-dose of various vaccines provides acceptable protection against infections by SARS-CoV-2 and evolution to the most severe forms of COVID-19. The recombinant adenovirus (rAd)-based vaccine, Gam-COVID-Vac (Sputnik V), was proven efficacious but information about effectiveness in the real-world setting is lacking. The aim of our study was to investigate the association between the rollout of the first component (rAd26) of Gam-COVID-Vac and PCR-positive tests, hospitalisations and deaths. Methods We conducted a retrospective cohort study which analyzed individuals aged 60-79 who self-registered in the online vaccination system of the Province of Buenos Aires, Argentina, from December 29, 2020 to March 21, 2021. Exclusion criteria were having a previous positive RT-PCR or antigen tests for SARS-CoV-2, having received other vaccines, or two doses of any vaccine. Proportions of new laboratory-confirmed SARS-CoV-2 infections, hospitalisations and deaths until 83 days of vaccination were compared between vaccinated and unvaccinated subjects. Vaccine effectiveness for the three outcomes was calculated as (1–OR) × 100. Kaplan-Meier cumulative incidence curves were constructed. Findings During the study period 415995 registered subjects received the first component of Gam-COVID-Vac; 40387 belonged to the 60-79 age group, and were compared to 38978 unvaccinated. Vaccine effectiveness for preventing laboratory-confirmed infections was 78•6% [CI95% 74·8 - 81·7]; and for reducing hospitalizations and deaths was, respectively, 87·6% [CI95% 80·3 - 92·2] and 84·8% [CI95% 75·0 - 90·7]. Effectiveness was high across all subgroups. Interpretation Similarly to other vaccines, the administration of one dose of Gam-COVID-Vac was effective for a wide range of COVID-19–related outcomes.Facultad de Ciencias Médica

Immune Response to SARS-CoV-2 Third Vaccine in Patients With Rheumatoid Arthritis Who Had No Seroconversion After Primary 2-Dose Regimen With Inactivated or Vector-Based Vaccines

Objective. The aim of this study was to assess the immune response after a third dose of SARS-CoV-2 vaccine in patients with rheumatoid arthritis (RA) with undetectable antibody titers after the primary regimen of 2 doses. Methods. Patients with RA with no seroconversion after 2 doses of SARS-CoV-2 vaccine and who received a third dose of either an mRNA or vector-based vaccine were included. Anti-SARS-CoV-2 IgG antibodies, neutralizing activity, and T cell responses were assessed after the third dose. Results. A total of 21 nonresponder patients were included. At the time of vaccination, 29% were receiving glucocorticoids and 85% biologic disease-modifying antirheumatic drugs (including 6 taking abatacept [ABA] and 4 taking rituximab [RTX]). The majority (95%) received the BNT162b2 vaccine and only one of them received the ChAdOx1 nCoV-19 vaccine. After the third dose, 91% of the patients presented detectable anti-SARS-CoV-2 IgG and 76% showed neutralizing activity. Compared to other treatments, ABA and RTX were associated with the absence of neutralizing activity in 4 out of 5 (80%) patients and lower titers of neutralizing antibodies (median 3, IQR 0-20 vs 8, IQR 4-128; P = 0.20). Specific T cell response was detected in 41% of all patients after the second dose, increasing to 71% after the third dose. The use of ABA was associated with a lower frequency of T cell response (33% vs 87%, P = 0.03). Conclusion. In this RA cohort, 91% of patients who failed to seroconvert after 2 doses of SARS-CoV-2 vaccine presented detectable anti-SARS-CoV-2 IgG after a third dose. The use of ABA was associated with a lower frequency of specific T cell response.Fil: Isnardi, Carolina A.. No especifíca;Fil: Cerda, Osvaldo L.. No especifíca;Fil: Landi, Margarita. Austral University Hospital; LiberiaFil: Cruces, Leonel Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Schneeberger, Emilce E.. No especifíca;Fil: Montoro, Claudia Calle. Austral University Hospital; LiberiaFil: Alfaro, María Agustina. No especifíca;Fil: Roldán, Brian M.. No especifíca;Fil: Gómez Vara, Andrea B.. No especifíca;Fil: Giorgis, Pamela. No especifíca;Fil: Ezquer, Roberto Alejandro. No especifíca;Fil: Crespo Rocha, María G. No especifíca;Fil: Reyes Gómez, Camila R.. No especifíca;Fil: de Los Ángeles Correa, Mária. No especifíca;Fil: Rosemffet, Marcos G.. No especifíca;Fil: Abarza, Virginia Carrizo. No especifíca;Fil: Pellet, Santiago Catalan. Austral University Hospital; LiberiaFil: Perandones, Miguel. No especifíca;Fil: Reimundes, Cecilia. Austral University Hospital; LiberiaFil: Longueira, Yesica Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Turk, Gabriela Julia Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Quiroga, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Laufer, Natalia Lorna. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas en Retrovirus y Sida. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas en Retrovirus y Sida; ArgentinaFil: Quintana, Rosana Maris. No especifíca;Fil: de la Vega, María Celina. No especifíca;Fil: Kreplak, Nicolás. No especifíca;Fil: Pifano, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Maid, Pablo. Austral University Hospital; LiberiaFil: Pons Estel, Guillermo J.. No especifíca;Fil: Citera, Gustavo. No especifíca

Early high-titer plasma therapy to prevent severe Covid-19 in older adults

BACKGROUND: Therapies to interrupt the progression of early coronavirus disease 2019 (Covid-19) remain elusive. Among them, convalescent plasma administered to hospitalized patients has been unsuccessful, perhaps because antibodies should be administered earlier in the course of illness. METHODS We conducted a randomized, double-blind, placebo-controlled trial of convalescent plasma with high IgG titers against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in older adult patients within 72 hours after the onset of mild Covid-19 symptoms. The primary end point was severe respiratory disease, defined as a respiratory rate of 30 breaths per minute or more, an oxygen saturation of less than 93% while the patient was breathing ambient air, or both. The trial was stopped early at 76% of its projected sample size because cases of Covid-19 in the trial region decreased considerably and steady enrollment of trial patients became virtually impossible. RESULTS A total of 160 patients underwent randomization. In the intention-to-treat population, severe respiratory disease developed in 13 of 80 patients (16%) who received convalescent plasma and 25 of 80 patients (31%) who received placebo (relative risk, 0.52; 95% confidence interval [CI], 0.29 to 0.94; P = 0.03), with a relative risk reduction of 48%. A modified intention-to-treat analysis that excluded 6 patients who had a primary end-point event before infusion of convalescent plasma or placebo showed a larger effect size (relative risk, 0.40; 95% CI, 0.20 to 0.81). No solicited adverse events were observed. CONCLUSIONS Early administration of high-titer convalescent plasma against SARS-CoV-2 to mildly ill infected older adults reduced the progression of Covid-19. (Funded by the Bill and Melinda Gates Foundation and the Fundación INFANT Pandemic Fund; Dirección de Sangre y Medicina Transfusional del Ministerio de Salud number, PAEPCC19, Plataforma de Registro Informatizado de Investigaciones en Salud number, 1421, and ClinicalTrials.gov number, NCT04479163.).Fil: Libster, Romina Paula. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Pérez Marc, Gonzalo. Hospital Militar Central, Buenos Aires; ArgentinaFil: Wappner, Diego. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Coviello, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Bianchi, Alejandra. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Braem, Virginia. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Esteban, Ignacio. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Caballero, Mauricio Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Wood, Cristian. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Berrueta, Mabel. Hospital Militar Central; ArgentinaFil: Rondan, Aníbal. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Lescano, Gabriela Mariel. Hospital Dr. Carlos Bocalandro; ArgentinaFil: Cruz, Pablo. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Ritou, Yvonne. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Fernández Viña, Valeria Silvina. Hospital Simplemente Evita; ArgentinaFil: Álvarez Paggi, Damián Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Esperante, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; ArgentinaFil: Ferreti, Adrián. Hospital Dr. Carlos Bocalandro; ArgentinaFil: Ofman, Gaston. University of Oklahoma; Estados UnidosFil: Ciganda, Álvaro. Gobierno de la Provincia de Buenos Aires. Hospital Interzonal Especializado de Agudos y Cronicos San Juan de Dios.; ArgentinaFil: Rodriguez, Rocío. Hospital Simplemente Evita; ArgentinaFil: Lantos, Jorge. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Valentini, Ricardo. No especifíca;Fil: Itcovici, Nicolás. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Hintze, Alejandra. No especifíca;Fil: Oyarvide, M. Laura. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Etchegaray, Candela. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Neira, Alejandra. Instituto de Efectividad Clínica y Sanitaria; ArgentinaFil: Name, Ivonne. Instituto de Efectividad Clínica y Sanitaria; ArgentinaFil: Alfonso, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Swiss Medical Group; ArgentinaFil: López Castelo, Rocío. Centro de Educación Médica e Investigaciones Clínicas "Norberto Quirno"; ArgentinaFil: Caruso, Gisela. Hospital Militar Central; ArgentinaFil: Rapelius, Sofía. Hospital Militar Central; ArgentinaFil: Alvez, Fernando. Hospital Militar Central; ArgentinaFil: Etchenique, Federico. Hospital Militar Central; ArgentinaFil: Dimase, Federico. Hospital Militar Central; ArgentinaFil: Alvarez, Darío. Hospital Militar Central; ArgentinaFil: Aranda, Sofía S.. Hospital Militar Central; ArgentinaFil: Sánchez Yanotti, Clara Inés. Hospital Militar Central; ArgentinaFil: De Luca, Julián. Hospital Militar Central; ArgentinaFil: Jares Baglivo, Sofía. Hospital Militar Central; ArgentinaFil: Laudanno, Sofía. Fundación Hematológica Sarmiento; ArgentinaFil: Nowogrodzki, Florencia. Swiss Medical Group; ArgentinaFil: Larrea, Ramiro. Hospital Municipal San Isidro; ArgentinaFil: Silveyra, María. Hospital Militar Central; ArgentinaFil: Leberzstein, Gabriel. No especifíca;Fil: Debonis, Alejandra. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Molinos, Juan. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: González, Miguel. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Perez, Eduardo. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Kreplak, Nicolás. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Pastor Argüello, Susana. Fundación para la Investigación en Infectología Infantil; ArgentinaFil: Gibbons, Luz. Hospital Municipal de San Isidro; ArgentinaFil: Althabe, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto de Efectividad Clínica y Sanitaria; ArgentinaFil: Bergel, Eduardo. Sanatorio Sagrado Corazón; ArgentinaFil: Polack, Fernando Pedro. Provincia de Buenos Aires. Ministerio de Salud; Argentin

O impacto da aplicação de vacinas contra a COVID-19 sobre a incidência de novas infeções pelo SARS –COV-2 em trabalhadores da saúde da Provincia de Buenos Aires

Introduction. The vaccination plan of the province of Buenos Aires has prioritized the groups with the highest epidemiological risk, initiating the immunization process on Health Care Worker (HCP). The present work aims to evaluate the impact of vaccination on the mean evolution of new SARS-Cov-2 cases in HCP compared to that of the general population. Methodology. Information on confirmed cases was obtained from the Sistema Nacional de Vigilancia en Salud, period April/2020 to March/2021. The number of vaccinated used the base of the VacunatePBA system. Results. As of September, the number of cases begins to decrease more sharply in HCP than in the general population. This trend is consolidated with the beginning of the vaccination plan. By February 2021, 42% of the HCP had been immunized with the first dose and 24% with the second dose. It is observed that, in March, while the number of cases in the General Population increased by 10% compared to February, HCP decreased by 35%. This indicates a significantly more pronounced decrease in HCP (p-value &lt;0.00001). Discussion. Since the introduction of the COVID-19 vaccine at the end of december in different countries, a decrease in the incidence of new cases of SARS-CoV-2 infection in HCP has begun to be reported, coinciding with the findings of the present study. Our study provides the first data in the country on the impact of COVID-19 vaccines on HCP.Introducción. El plan de vacunación de la provincia de Buenos Aires ha priorizado los grupos de mayor riesgo epidemiológico, iniciando el proceso de inmunización sobre el Personal de Salud (PS).El presente trabajo tiene por objetivo evaluar el impacto de la vacunación sobre la evolución media de nuevos casos SARS-Cov-2 en PS comparada con la de la población general. Metodología. La información de los casos confirmados se obtuvo del Sistema Nacional de Vigilancia de la Salud, período abril/2020 a marzo/2021. La cantidad de vacunados utilizó la base del sistema VacunatePBA. Resultados. A partir de septiembre, el número de casos comienza a disminuir más pronunciadamente en PS que en la población general. Esta tendencia se consolida con el comienzo del plan de vacunación. Para febrero de 2021 se han inmunizado con la primera dosis el 42% del PS y con la segunda dosis el 24%. Se observa que, en marzo, mientras la cantidad de casos de la Población General aumenta un 10% respecto a febrero, PS disminuye un 35%. Esto indica un descenso significativamente más pronunciado en PS (p-valor &lt; 0.00001). Discusión. A partir de la introducción de la vacuna contra COVID-19 a finales de diciembre en distintos países, se ha comenzado a reportar una baja de la incidencia de nuevos casos de infección por SARS-CoV-2 en PS, coincidente con los hallazgos del presente estudio. Nuestro estudio aporta los primeros datos del país sobre el impacto de las vacunas COVID-19 en PS

Exceso de mortalidad por la pandemia de Covid-19 durante 2020 en la provincia de Buenos Aires, Argentina

INTRODUCCIÓN: El exceso de mortalidad (EM) provee una métrica robusta del impacto en este indicador durante un evento pandémico o fuera de lo habitual. Se realizó el presente estudio con el objetivo de determinar el impacto de la pandemia por la enfermedad por el nuevo coronavirus (COVID-19) sobre el exceso de muertes ocurrido en la provincia de Buenos Aires (PBA). MÉTODOS: Estudio descriptivo retrospectivo de base poblacional. Para el análisis del EM se utilizó el método P-score, con base en la comparación de la mortalidad entre un período basal -histórico 2015-2019, respecto a las defunciones con ocurrencia en la Provincia durante 2020. RESULTADOS: La PBA tiene un registro provisorio de un EM promedio de 7,59%, considerando como línea de base el límite superior de confianza del 95% de la serie histórica 2015-2019, o del 12,15% si se considera el promedio histórico. Se observa un impacto diferencial del EM según el sexo y el grupo etario. DISCUSIÓN: Las muertes por COVID-19 en la PBA superan el EM, lo que podría indicar la existencia de reemplazo de otras causas de defunción. Este resultado, que distingue a la PBA de los países de América Latina relevados y otros países europeos y de Oceanía, no permitiría estimar un subregistro en la contabilización de defunciones por COVID-19.INTRODUCTION: Excess mortality (EM) provides a robust metric of the global impact of mortality during a pandemic or unusual event. In order to determine the impact of the COVID-19 pandemic on the excess of deaths that occurred in the Buenos Aires Province (BAP), the present study was carried out. METHODS: A population-based retrospective descriptive study has been developed. For the analysis of EM, the P-score method was used, based on the comparison of mortality between a baseline period -historical 2015-2019-, with respect to deaths that occurred in the Province during the year 2020. RESULTS: The Province provisionally records an average EM of 7.59%, considering as a baseline the upper confidence limit of 95% of the historical series 2015-2019, or 12.15% if the historical average is considered. A differential impact is observed according to sex and age group with respect to the values of the historical period. DISCUSSION: Deaths from COVID-19 in the Province exceed EM, which indicates the existence of a replacement for other causes of death. This result, which distinguishes the BAP from the Latin American countries surveyed and other European and Oceania countries, it would not be possible to estimate an underreporting of deaths from COVID-19

Sobrevida en pacientes internados en unidades de cuidados intensivos por Covid-19 en la provincia de Buenos Aires, Argentina

Introducción: Uno de los problemas que ha enfrentado el sistema de salud de los diferentes países debido a la pandemia de COVID-19 es la disponibilidad de servicios y atención médica en unidades de cuidados intensivos (UCI). El objetivo fue evaluar la sobrevida en pacientes internados por COVID-19 en UCI entre enero y abril de 2021 en la provincia de Buenos Aires, Argentina. Métodos: Se consideró a los pacientes que, incluidos en el sistema de vigilancia, tuvieran su correlato de información del porcentaje ocupacional de camas de la UCI desde el sistema general. Con esta información se realizó un análisis de sobrevida, considerando tablas de vida, Kaplan-Meier y regresión de Cox. El evento fue el óbito, el tiempo de seguimiento a 96 días y las fechas de internación, defunción y egreso dentro de la UCI como períodos individuales de cada paciente. La capacidad operativa de las UCI fue medida a través del porcentaje de ocupación de camas al momento del ingreso. Resultados: Las UCI con un porcentaje ocupacional mayor al 80% mostraron pacientes con menor curva de sobrevida que sus pares por debajo de esas cifras al momento de ingresar a la internación. Discusión: Las diferencias en promedios de sobrevida son estadísticamente diferentes, y muestran dos curvas distintas de supervivencia en el momento en que la segunda ola de COVID-19 afectaba a la Argentina.Introduction: One of the problems faced by the health system in different countries due to COVID-19 pandemic is the availability of medical care services in intensive care units (ICU). The objective was to evaluate survival in patients hospitalized for COVID-19 in the ICUs during the period January-April 2021 in the province of Buenos Aires. Methods: Patients included in the surveillance system who had their correlate of information on percentage of bed occupancy in the ICUs from the general system were considered. With this information, a survival analysis was performed, considering life tables, Kaplan-Meier and Cox regression. The event was death, the 96-day follow-up and the dates of admission, death and discharge within the ICUs as individual periods for each patient. Inpatient capacity of the ICUs was measured through the percentage of bed occupancy at the time of admission. Results: The ICUs with a bed occupancy greater than 80% showed patients with a lower survival curve than those below that figure at the time of admission. Discussion: The differences in average survival were statistically significant, and show two different survival curves at the time the second wave of COVID-19 affected the country

Efectos de la pandemia en muertes no Covid-19: análisis en la provincia de Buenos Aires, Argentina, 2020

Introducción: El impacto de la pandemia por COVID-19 sobre la mortalidad abarca tanto sus efectos directos, las defunciones atribuidas al virus SARS-CoV-2, como indirectos sobre otras causas de muerte. “El objetivo del estudio fue determinar la variación sobre causas de muerte no COVID-19 en la provincia de Buenos Aires durante 2020. Métodos: Se realizó un estudio descriptivo de base poblacional, utilizando fuentes secundarias. Se analizó la variación en la mortalidad por causas específicas codificadas según CIE-10, desagregadas a nivel de capítulo y grupos. Las variaciones entre las causas de muerte observadas y esperadas se compararon mediante el método de P-score respecto al quinquenio inmediato anterior (2015-2019). Resultados: Todos los capítulos CIE-10 estudiados se ubican por debajo del promedio de la serie histórica. La mayor variación se registra en causas externas (-20,0%), enfermedades del sistema respiratorio (-9,1%), tumores (-8,1%), enfermedades nutricionales, endocrinas y metabólicas (-5,7%) y finalmente enfermedades del sistema circulatorio (-2,2%). Discusión: Se observó la existencia de un reemplazo variable de otras causas de defunción por muertes COVID-19 durante 2020. El análisis de causas múltiples resultó de utilidad para reestimar, en el caso del grupo de influenza (gripe) y neumonías, la participación global de la COVID-19 en la cadena de eventos que contribuyeron al deceso.Introduction: The impact of the COVID-19 pandemic on mortality encompasses both its direct effects, deaths attributed to the SARS-CoV-2 virus, as well as indirect on other causes of death. The objective of the study was to determine the variation in non- COVID-19 causes of death in the province of Buenos Aires during 2020. Methods: A population-based descriptive study was carried out using secondary sources. Specific causes of death coded according to ICD-10, disaggregated by chapter and group, were analyzed. To determine whether there were variations between the observed and expected causes of death, the values of the study period were compared with the immediately preceding five-year period (2015-2019) using the P-score method. Results: All the ICD-10 chapters studied are below the average of the historical series. The greatest variation appears in the chapter External Causes (-20.0%), Diseases of the Respiratory System (-9.1%), Neoplasms (-8.1%), Endocrine, Nutritional and Metabolic Diseases (-5.7%) and, finally, Diseases of the Circulatory System (-2.2%). Discussion: There is a variable change of other causes of death by COVID-19 deaths during 2020. The analysis of multiple causes was useful to re-estimate, in the case of the group of influenza (flu) and pneumonia, the global participation of COVID-19 in the chain of events that contributed to the death

Timing of Convalescent plasma administration and 28-day mortality for COVID-19 pneumonia

Convalescent plasma administration (CPA) is widely used to treat Covid-19, but its effectiveness remains controversial. Here we report the results of an Expanded Access Program of CPA in the province of Buenos Aires, Argentina. We evaluated the relationship between the timing of CPA and 28-day mortality in 4719 hospitalized patients with COVID-19 pneumonia. Early ([≤]3 days from admission) CPA was associated to decreased mortality in patients in the general ward and in the Intensive Care Unit not requiring mechanical ventilation. This suggests that the favorable effect of CPA might be related both to disease acuity and to the therapeutic window.Facultad de Ciencias Médica