Sparse data exist on the complex natural immunity to SARS-CoV-2 at the population level.
We applied a well-validated multiplex serology test in 5000 participants of a general …

Background Heterogeneity of the population in relation to infection, COVID-19 vaccination,
and host characteristics is likely reflected in the underlying SARS-CoV-2 antibody …

Objectives Dynamics of antibody responses following SARS-CoV-2 infection are
controversial in terms of immunity and persistence. We aimed to assess longitudinally the …

COVID-19 is a current global threat, and the characterization of antibody response is vitally
important to update vaccine development and strategies. In this study we assessed SARS …

During the COVID‐19 pandemic, Portugal has experienced three distinct SARS‐CoV‐2
infection waves. We previously documented the prevalence of SARS‐CoV‐2 immunity …

This contribution explores in a new statistical perspective the antibody responses to severe
acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in 141 coronavirus disease 2019 …

Objective To follow serological immune responses of front-line healthcare workers after PCR-
confirmed COVID-19 for a mean of 30 weeks, describe the time-course of SARS-CoV-2 …

Background: The main aims of this study were to analyze trends of SARS-CoV-2 anti-
nucleocapsid IgG throughout the four rounds of the seroepidemiologic study ENE-COVID …

Background Assessing the burden of COVID-19 based on medically-attended case counts is
suboptimal given its reliance on testing strategy, changing case definitions and the wide …

Objectives We aimed to assess the level of prior SARS-CoV-2 infection in socially deprived
neighbourhoods after the first wave of the pandemic, and to identify factors associated with …