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 …

ABSTRACT OBJECTIVE: To estimate the seroprevalence of SARS-CoV-2 in the state of
Maranhão, Brazil. METHODS: A population-based household survey was performed, from …

Objective. To estimate the prevalence of SARS-CoV-2 antibodies in an asymptomatic
population in the state of Sergipe, Brazil. Methods. This cross-sectional study with stratified …

Background Population-based data on COVID-19 are essential for guiding policies. There
are few such studies, particularly from low or middle-income countries. Brazil is currently a …

Objectives. To investigate socioeconomic and ethnic group inequalities in prevalence of
antibodies against SARS-CoV-2 in the 27 federative units of Brazil. Methods. In this cross …

Abstract Background Coronavirus disease 2019 (COVID‐19) convalescent plasma (CCP)
collection began in two Brazilian hospitals for treatment of severe/critical patients. Methods …

Background Manaus, located in the Brazilian rainforest, has experienced two health system
collapses due to the coronavirus disease 2019 (COVID-19) pandemic. However, little is …

COVID-19, the disease produced by the virus SARS-CoV-2, has spread quickly throughout
the world, leading the World Health Organization to first classify it as an international health …

Background The pandemic due to severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) has tremendous consequences for our societies. Knowledge of the seroprevalence …

Background Case detection underestimates the burden of the COVID‐19 pandemic.
Following the first COVID‐19 wave, we estimated the seroprevalence of severe acute …