View clinical trials related to Vaccine Response Impaired.
Filter by:The goal of this clinical trial is to examine immune responses to the BCG vaccine in healthy adults who have, or who have not, taken antibiotics to deplete their gut bacteria prior to vaccination. The main question it aims to answer is: does depletion of the gut microbiota lead to impaired BCG-induced protection against specific and non-specific to challenges to the immune system?
Immunocompromised individuals, such as solid organ transplant (SOT) recipients are at high risk of COVID-19 associated complications and mortality. Retrospective studies so far have shown that a majority of SOT recipients did not develop appreciable anti-spike antibody response after a first, second, or even third dose of mRNA vaccine. Treatment with antimetabolites was associated with poor vaccine response. The goal of this study is 1) examine whether transient immunosuppression reduction improves the immune response to a third dose of SARS-CoV-2 mRNA vaccine in kidney transplant recipients and 2) to assess the safety of immunosuppression reduction before and after third dose SARS-CoV-2 mRNA vaccination.
The primary objective of this study is to characterize the antibody response to seasonal influenza vaccine, in patients with active RRMS, treated with cladribine, compared to control individuals with basic immunomodulatory treatment. Serum antibody titers against the respective pathogen will be assessed prior to and 6 to 8 months following vaccination.
In the context of malignant disease, it is likely that vaccine efficacy and immunogenicity depends on the type of pathology, stage of the disease, immunosuppression induced by the treatments, in addition to more classic factors such as age, general condition and possibly the type of vaccine used. There are very little data on the efficacy and immunogenicity of anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines in patients with malignant disease in the active phase of treatment. This multicenter observational study aims to assess the efficacy and the immunogenicity of anti-Sars-CoV-2 vaccines in the cohort of patients treated for malignant pathology (solid or hematological tumors) at Saint Louis Hospital and in thoracic oncology patients at Bichat Hospital.
This is a prospective, multi-center, observational study that will enroll patients receiving dialysis (hemodialysis or peritoneal dialysis) or patients with kidney transplantation who will be vaccinated against COVID-19.