[Social vulnerability, survival, and hospital lethality by COVID-19 in patients aged 50 years and over: retrospective cohort of cases in Brazil in 2020 and 2021].

The outcome of SARS-CoV-2 infection is not only associated with age and comorbidities but is also aggravated by social vulnerability. This study aims to analyze - according to social vulnerability - survival and hospital lethality by COVID-19 in the first 100 days from symptoms to death in individuals aged 50 years or older hospitalized in Brazil. This is a retrospective cohort from Epidemiological Week 11 of 2020 to week 33 of 2021.

Brazilian spotted fever: A spatial analysis of human cases and vectors in the state of São Paulo, Brazil.

Brazilian spotted fever (BSF) is a highly lethal disease caused by Rickettsia spp. and is transmitted by ticks of the genus Amblyomma. Understanding the epidemiology of BSF in each region can help direct health surveillance actions.

Drinking Water Quality Surveillance Information System (SISAGUA): characteristics, evolution and applicability.

The Drinking Water Quality Surveillance Information System (SISAGUA) is an instrument used in Brazil to record forms of water supply and water quality monitoring data recommended by the potable water standard. This information is used in the management of health risks associated with water supply in the country and supports the surveillance of drinking water quality, the structuring of public policies in the area of environmental health and sanitation, the prevention of waterborne diseases, and the characterization of the quality of water consumed by the Brazilian population. This article describes the history of SISAGUA and presents the main features of its current version (SISAGUA 4) regarding data collection and processing, variables, uses and accesses, data coverage and quality, as well as the system's applicability, limitations and challenges.