Objectives This study aimed to describe the impact of vaccination and the role of humoral
responses on post–COVID-19 syndrome 1 year after the onset of SARS coronavirus type 2 …

Objectives To assess the prevalence of and factors associated with post-coronavirus
disease 2019 (COVID-19) syndrome 6 months after the onset. Methods A bidirectional …

Background In a country-wide seroprevalence study of COVID-19 in Estonia, we aimed to
determine the seroprevalence and the dynamics of IgG against SARS-CoV-2 after …

Objectives First, to describe SARS-CoV-2 T cell and antibody responses in a prospective
cohort of healthcare workers that suffered from mild to moderate COVID-19 approximately …

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 …

Background Vaccination protects against severe COVID-19 manifestations. For those with
post-COVID-19 conditions (PCC) or long COVID, the impact of COVID-19 vaccination on the …

The immune response after SARS-CoV-2 vaccine administration appears to be
characterized by high inter-individual variation, even in SARS-CoV-2 positive subjects, who …

Background The relationship of host immune response and viral replication with health
outcomes in patients with COVID-19 remains to be defined. We aimed to characterize the …

Background The long-term course of immunity among individuals with a history of COVID-
19, in particular among those who received a booster vaccination, has not been well defined …

Background Understanding the long-term kinetic characteristics of SARS-CoV-2 antibodies
and the impact of inactivated vaccines on SARS-CoV-2 antibodies in convalescent patients …