Abstract Background and Purpose Waning immunity and the surge of SARS-CoV-2 variants
are responsible for breakthrough infections, ie, infections in fully vaccinated individuals …

Objectives The relationship between infections or vaccine antigens and exacerbations or
new onset of immune-mediated diseases (IMDs) has long been known. In this observational …

Introduction While it is established that vaccination reduces risk of hospitalization, there is
conflicting data on whether it improves outcome among hospitalized COVID-19 patients …

Introduction The heterogeneity of the immunocompromised population means some
individuals may exhibit variable, weak or reduced vaccine-induced immune responses …

Objectives To explore variations in SARS-CoV-2 anti-spike (anti-S), anti-nucleocapsid (anti-
N), and neutralizing immunoglobulin G (IgG) antibodies, and T-cell response by type and …

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 …

Objectives The diffusion of the SARS-CoV-2 Delta (B. 1.617. 2) variant and the waning of
immune response after primary Covid-19 vaccination favoured the breakthrough SARS-CoV …

During the COVID19 pandemic, a range of vaccines displayed high efficacy in preventing
disease, severe outcomes of infection, and mortality. However, the immunological correlates …

Background: Humoral and cellular immune responses to SARS-CoV-2 vaccination among
immunosuppressed patients remain poorly defined, as well as variables associated with …

Constant efforts to prevent infections by severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) are actively carried out around the world. Several vaccines are currently …