… We classified health care workers according to their baseline antibody status. Those with
only negative antibody assays were considered to be at risk for infection from their first antibody …

… the antibody trajectories of 452 SARS-CoV-2 IgG-seropositive HCWs over a median 121
days of follow-up from their maximum IgG titre. By following quantitative antibody responses, we …

… COVID-19 patients identified in our hospital and the quarantine timeline for the 105 healthcare
workers … The cycle threshold (Ct) of values of SARS-CoV-2 RNA from nasopharyngeal …

… Serological testing is a key investigative tool in the COVID-19 epidemic and can locate an
… Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) serological testing may …

… -CoV-2 antibodies. It is known that SARS-CoV-2 antibody tests are accurate to detect
previous SARS-CoV-2 infection if performed >14 days after the onset of symptoms, but they have …

… persistence of neutralizing antibodies (NAbs) among SARS-CoV-2-infected healthcare
workers (HCW). These individuals are particularly exposed to SARS-CoV-2 infection and at …

… In 5 of 316 (1.6 %) healthcare workers SARS-CoV-2-IgG antibodies could be detected. The
… the SARS-CoV-2 seroprevalence in healthcare workers of the University Hospital Essen, …

… associated with antibody positivity even after adjusting for personal COVID-19 diagnosis …
associated with SARS-CoV-2 seroprevalence among our healthcare workers underscore the …

… testing in a cohort of >10 000 healthcare workers (HCWs) [15]. We now describe serial
SARS-CoV-2 antibody … but anti-spike levels antibodies remain stably detected in most individuals. …

… with COVID-19. Here we report a relatively low seroprevalence of antibodies among HCW at
the peak of the COVID-19 … with COVID-19, which calls for active periodic rRT-PCR testing in …