Despite lockdown measures, intense symptom-based PCR, and antigen testing, the SARS-
CoV-2 pandemic spread further. In this open observational study conducted in Lower …

Objectives Due to a substantial proportion of asymptomatic and mild courses, many severe
acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections remain unreported …

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a
global pandemic. The proportion of infected individuals who seroconvert is still an open …

Not all persons recovering from severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) infection develop SARS-CoV-2–specific antibodies. We show that …

ABSTRACT “Testing Denmark” is a national, large-scale, epidemiological surveillance study
of SARS-CoV-2 in the Danish population. Between September and October 2020 …

Background Due to the substantial proportion of asymptomatic and mild courses many
SARS-CoV-2 infections remain unreported. Therefore, assessment of seroprevalence may …

Background Serology testing is explored for epidemiological research and to inform
individuals after suspected infection. During the coronavirus disease 2019 (COVID-19) …

Background Until now, information on the spread of SARS-CoV-2 infections in Germany has
been based mainly on data from the public health offices. It may be assumed that these data …

Abstract BACKGROUND The World Health Organization declared the outbreak of
coronavirus disease to be a public health emergency of international concern on January …

It is of paramount importance to evaluate the prevalence of both asymptomatic and
symptomatic cases of SARS-CoV-2 infection and their antibody response profile. Here, we …