Objectives To summarize the data on SARS-CoV-2 seroprevalence surveys conducted in
Brazil before the introduction of vaccines Methods The authors conducted a systematic …

Population-based seroprevalence studies on coronavirus disease 2019 (COVID-19) in low-
and middle-income countries are lacking. We investigated the seroprevalence of severe …

Background: São Paulo city has been one of the regions most affected by the COVID-19
pandemic in Brazil. Frequent asymptomatic and oligosymptomatic infections and poor …

Introduction: Following a COVID-19 mass vaccination campaign, it is important to evaluate
the population level of SARS-CoV-2 antibodies. The aim of this study was to estimate the …

Background Few population-based studies on the prevalence of severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) have been performed to date, and most of them …

A second wave of COVID-19 has demonstrated how challenging it will be to achieve
sustained control of the disease, even with vaccination underway in many countries …

Background Covid-19 has been one of the major concerns around the world in the last 2
years. One of the challenges of this disease has been to determine its prevalence …

This study assessed the seroprevalence of SARS-CoV-2 in 496 asymptomatic individuals
from Mato Grosso do Sul, located in Dourados, the largest periurban indigenous area in …

Dados de soroprevalência oferecem informações relevantes relacionadas ao
desenvolvimento e progressão de pandemia da COVID-19. Estimar a prevalência de …

Abstract The Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection
seroprevalence can be performed by detecting anti-SARS-CoV-2 antibodies. The survey is …