Controlled Human Infection Models (CHIMs) involve deliberately exposing healthy human
volunteers to a known pathogen, to allow the detailed study of disease processes and …

We conducted a seroprevalence study using convenient residual sera samples from the
Slovenian population collected after the end of the Omicron BA. 1 pandemic wave. Serum …

The COVID-19 pandemic underlined the importance of serosurveillance as an evidence-
based tool to understand population immunity, track viral transmission, and guide public …

There are limited data on individual risk factors for SARS-CoV-2 infection (including
unrecognized infection). In this seroepidemiologic substudy of an ongoing prospective …

Background The COVID-19 pandemic has global impacts but is relatively understudied in
developing countries. Mongolia, a lower-middle-income country, instituted strict control …

SARS-CoV-2 serosurveys help estimate the extent of transmission and guide the allocation
of COVID-19 vaccines. We measured SARS-CoV-2 seroprevalence among women …

A large proportion of the world's population has some form of immunity against SARS-CoV-
2, through either infection ('natural'), vaccination or both ('hybrid'). This retrospective cohort …

Objectives This study aimed to investigate the changing SARS-CoV-2 seroprevalence and
associated health and sociodemographic factors in Malawi between February 2021 and …

This study aimed at identifying factors influencing SARS-CoV-2-specific IgG antibody levels
after vaccination and/or infection. Between January 2022 and March 2023, 2000 adults (≥ …

Abstract Introduction In Sofala province (Mozambique), young people living with HIV
(YPLHIV) are estimated at 7% among people aged 15–24 years. Even though the COVID-19 …