Publications by authors named "Oswaldo Cruz"

In disease mapping, the relative risk of a disease is commonly estimated across different areas within a region of interest. The number of cases in an area is often assumed to follow a Poisson distribution whose mean is decomposed as the product between an offset and the logarithm of the disease's relative risk. The log risk may be written as the sum of fixed effects and latent random effects.

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Article Synopsis
  • The municipality of Rio de Janeiro has enhanced its health surveillance strategies by integrating epidemic intelligence and technology, especially during the COVID-19 pandemic.
  • The Epidemiological Intelligence Center (CIE), opened in March 2022, utilizes a multiprofessional team and various data sources to facilitate early detection of public health trends.
  • The center has established a data lake to store health data related to COVID-19, created descriptive and analytical dashboards for different users, and implemented an alert panel to quickly respond to public health emergencies.
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The influenza-like illness (ILI) sentinel surveillance operates in Brazil to identify respiratory viruses of public health relevance circulating in the country and was first implemented in 2000. Recently, the COVID-19 pandemic reinforced the importance of early detection of the circulation of new viruses in Brazil. Therefore, an analysis of the design of the ILI sentinel surveillance is timely.

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Objective: This is a retrospective analysis of the major and minor complications of cochlear implants, as well as the Risk Factors (RF) involved.

Methods: We analyzed the medical records of patients submitted to cochlear implants at public University from 2006 to July 2019, and list here the major and minor complications found, and their risk factors.

Results: There were 193 ears, 100 (51.

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• COVID-19 has been associated to Sensorineural Hearing Loss. • Cochlear implants may benefit patients with profound hearing loss post COVID-19. • Hearing rehabilitation should not be postponed in cases of deafness post COVID-19.

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Article Synopsis
  • - This study explored how SARS-CoV-2 spreads within households, focusing on the role of children and their adult caregivers, particularly examining whether children mostly contracted the virus from symptomatic adults, especially mothers.
  • - Conducted in Brazil from April 2020 to July 2022, the study involved 1,256 participants across 298 households, revealing that children are less likely to transmit the virus compared to adults, especially if the adult is symptomatic or unvaccinated.
  • - Findings highlighted that vaccinated adults not only had a lower chance of severe illness but also reduced the risk of infecting their household members, suggesting implications for similar urban populations in Latin America.
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Objective: To evaluate excess mortality in the city of Rio de Janeiro, Brazil, due to the COVID-19 pandemic (March 2020 to January 2022).

Methods: Ecological study using secondary data from the Brazilian Mortality Information System, having the city of Rio de Janeiro as the unit of analysis. Excess mortality was estimated by the difference between the mean number of all expected deaths and the mean number of observed deaths, considering the 2015-2019 period.

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Purpose: To better understand the household transmission of SARS-COV-2 in a low-resource community in Rio de Janeiro during the COVID-19 pandemic (2020-2022).

Participants: This is an open prospective cohort study of children ≤12 years old and their household contacts. During home visits over 24 months, we collected data on sociodemographic characteristics, behavioural data, clinical manifestations of SARS-CoV-2, vaccination status, SARS-CoV-2 (reverse transcription-polymerase chain reaction) RT-PCR and anti-S antibody tests.

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Background: Vaccines developed between 2020 and 2021 against the SARS-CoV-2 virus were designed to diminish the severity and prevent deaths due to COVID-19. However, estimates of the effectiveness of vaccination campaigns in achieving these goals remain a methodological challenge. In this work, we developed a Bayesian statistical model to estimate the number of deaths and hospitalisations averted by vaccination of older adults (above 60 years old) in Brazil.

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This cross-sectional observational study that describes the epidemiological data of the first year of the COVID-19 pandemic in the Mato Grosso do Sul State, aimed to demonstrate the differences between indigenous and non-indigenous populations, characterize confirmed cases of COVID-19 according to risk factors related to ethnicity, comorbidities and their evolution and to verify the challenges in facing the disease in Brazil. SIVEP-Gripe and E-SUS-VE, a nationwide surveillance database in Brazil, from March 2020 to March 2021 in Mato Grosso do Sul state, were used to compare survivors and non-survivors from indigenous and non-indigenous populations and the epidemiological incidence curves of these populations. A total of 176,478, including 5,299 indigenous people, were confirmed.

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Epidemiological surveillance and notification of respiratory infections are important for management and control of epidemics and pandemics. Fact-based decisions, like social distancing policies and preparation of hospital beds, are taken based on several factors, including case numbers; hence, health authorities need quick access to reliable and well-analysed data. We aimed to analyse the role of the Brazilian public health system in the notification and hospitalization of patients with severe acute respiratory infection (SARI).

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Dengue, Zika, and chikungunya are arboviral diseases (AVD) transmitted mainly by . Rio de Janeiro city, Brazil, has been endemic for dengue for over 30 years, and experienced the first joint epidemic of the three diseases between 2015-2016. They present similar symptoms and only a small proportion of cases are laboratory-confirmed.

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The present report describes the implementation of an emergency operations center to coordinate the response to the COVID-19 pandemic in the municipality of Rio de Janeiro, Brazil. Following the public health emergency management framework proposed by the World Health Organization (WHO), this temporary center (COE COVID-19 RIO) started operating in January 2021. The report is organized along five themes: legal framework; structure, planning, and procedures; institutional articulation; health information for decision-making; and risk communication.

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Following the reemergence of yellow fever in 2014/2015, Brazil recorded its largest yellow fever epidemic in recent decades, mainly affecting the country's Southeast region. Yellow fever is a hemorrhagic viral disease caused by a flavivirus transmitted by sylvatic mosquitos (Haemagogus; Sabethes). In the urban cycle, eradicated in Brazil since 1942, the virus is transmitted by Aedes aegypti.

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The human papillomavirus (HPV) is associated with cervical abnormalities. People living with HIV are more susceptible to HPV. Campos dos Goytacazes implemented the quadrivalent HPV vaccine (4vHPV) for women living with HIV (WLWH) in 2011, 4 years before the Brazilian public vaccination program.

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In a context of community transmission and shortage of vaccines, COVID-19 vaccination should focus on directly reducing the morbidity and mortality caused by the disease. It was thus essential to define priority groups for vaccination by the Brazilian National Immunization Program (PNI in Portuguese), based on the risk of hospitalization and death from the disease. We calculated overrisk according to sex, age group, and comorbidities using hospitalization and death records from severe acute respiratory illness with confirmation of COVID-19 (SARI-COVID) in all of Brazil in the first 6 months of the epidemic.

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Three key elements are the drivers of Aedes-borne disease: mosquito infestation, virus circulating, and susceptible human population. However, information on these aspects is not easily available in low- and middle-income countries. We analysed data on factors that influence one or more of those elements to study the first chikungunya epidemic in Rio de Janeiro city in 2016.

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Objectives: To investigate the dynamics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in a vulnerable population of children and their household contacts.

Methods: SARS-CoV-2 reverse transcription polymerase chain reaction assays and coronavirus disease 2019 (COVID-19) immunoglobulin G serology tests were performed in children and their household contacts after enrollment during primary health care clinic visits. Participants were followed prospectively with subsequent specimens collected through household visits in Manguinhos, an impoverished urban slum (a favela) in Rio de Janeiro at 1, 2, and 4 weeks and quarterly post study enrollment.

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Introduction: Electrocochleography has recently emerged as a diagnostic tool in cochlear implant surgery, purposing hearing preservation and optimal electrode positioning.

Objective: In this experimental study, extra-cochlear potentials were obtained during cochlear implant surgery in guinea pigs. The aim was to determine electrophysiological changes indicating cochlear trauma after cochleostomy and after electrode implantation in different insertion depths.

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Human papillomavirus (HPV) can cause genital warts and HPV-related cancer.People living with human immunodeficiency virus (HIV)are more symptomatic for HPV infections.Campos dos Goytacazes,a municipality of Rio de Janeiro,introduced the quadrivalent HPV vaccine (4vHPV)for HIV-positive women four years before initiation of a public vaccination program.

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Article Synopsis
  • Brazil identified community transmission of COVID-19 on March 13, 2020, and this study pinpointed the most vulnerable areas in the country based on risks of virus spread and social vulnerability.
  • Probabilistic models utilized mobility data from before the pandemic to assess the likelihood of COVID-19 transmission from hotspots like São Paulo and Rio de Janeiro, while socio-economic indices were analyzed to identify areas with similar vulnerabilities.
  • The study produced maps detailing outbreak probability and hospital capacity, which highlighted regions in the North and Northeast as both high-risk and socially vulnerable, and these maps were shared with health authorities for targeted pandemic response efforts.
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