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 …

Purpose Mental health conditions may affect outcome of COVID-19 disease, while exposure
to stressors during the pandemic may impact mental health. The purpose of this study was to …

Objective To investigate the specific and combined effects of personal concentrations of
some per-and polyfluoroalkyl substances (PFAS), other persistent organic pollutants (POPs) …

Background: Ambient air pollution has been associated with COVID-19 disease severity and
antibody response induced by infection. Objectives: We examined the association between …

Background The study of impact of lockdowns on individual health-related behaviors has
produced divergent results. Purpose To identify patterns of change in multiple health-related …

Background There is wide, largely unexplained heterogeneity in immunological and clinical
responses to SARS-CoV-2 infection. Numerous environmental chemicals, such as persistent …

SARS-CoV-2 seroprevalence was reported as substantially increased in medical personnel
and decreased in smokers after the first wave in spring 2020, including in our population …

Healthcare workers (HCWs) are on the frontline, struggling with the pandemic caused by
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To describe recent or past …

Background Serological data on endemic human coronaviruses (HCoVs) and severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) in southern Africa are scarce. Here, we …

Risk of depression increased in the general population after the COVID-19 pandemic
outbreak. By examining the interplay between genetics and individual environmental …