ABSTRACT Coronavirus disease 19 (COVID-19) is caused by SARS-Cov-2 and the
manifestations of this infection range from an absence of symptoms all the way up to severe …

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: 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 …

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 …

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 …

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 The exponential growth of COVID-19 cases in Brazil is overloading health
systems with overcrowding of hospitals and overflowing intensive care units. Increasing …

Background In this study, the prevalence and persistence of anti-SARS-CoV-2 (severe acute
respiratory syndrome-coronavirus) IgG was evaluated in volunteers 90 days after COVID-19 …

Abstract Background Covid-19 Serology may document exposure and perhaps protection to
the virus and serological test may help understand epidemic dynamics. We tested health …