View clinical trials related to Vaccine Reaction.
Filter by:The goal of this clinical study is to prove the no less immunogenicity of the Grippol Quadrivalent vaccine compared to the Grippol plus vaccine in children aged 6 months to 5 years (inclusive) for three identical strains of the compared vaccines in terms of the "proportion of vaccinated with seroconversion in paired sera of the hemagglutination inhibition reaction obtained before and after vaccination".
This study assesses the effectiveness of the seasonal flu vaccine in individuals with Type 2 Diabetes Mellitus (T2DM) with and without Chronic Kidney Disease (CKD), as well as in healthy individuals. Additionally, the study investigates the dynamics of cytokines, specifically IL-2 and IL-6, in the three groups following influenza vaccination. The findings from these studies will contribute to our understanding of the safety and efficacy of the influenza vaccine in T2DM and T2DM-CKD, shedding light on inflammation changes and informing future research on mitigation strategies.
The goal of this clinical trial is to assess tolerability, safety and immunogenicity of the Flu-M Quadro vaccine as compared to the Ultrix® Quadri vaccine in volunteers aged between 18 and 60. Participants were given Flu-M Quadro [inactivated split influenza vaccine] with preservative or Flu-M Quadro [inactivated split influenza vaccine] without preservative or Ultrix® Quadri vaccine.The volunteers of each group were vaccinated with a single dose vaccine. Researchers assessed the tolerability, safety and immunogenicity of the Flu-M Quadro quadrivalent inactivated split influenza vaccine. Researchers performed a comparative assessment of the tolerability, safety, and immunogenicity of the Flu-M Quadro quadrivalent inactivated split influenza vaccine and the Ultrix® Quadri vaccine.
Longitudinal study on healthy subjects to investigate the longevity of the antibody response to the Pfizer-BioNTech COVID-19 vaccine. Venous blood samples will be collected on an outpatient basis from 400 adults at regular intervals (1, 2, 4, 6, 12, 18 and 24 months) after the second dose of the vaccine. In the event of the administration of a third dose, the participants already recruited will be subjected to a venous blood sample immediately before administration and subsequently at regular intervals (1, 2, 4, 6, 8 and 12 months). A laboratory serological test will be performed for each sample. The expression of humoral biomarkers will be evaluated with the Luminex methodology with the aim of identifying prognostic and predictive biomarkers of the response to the vaccine.
Easing the morbidity and economic burden of age-related diseases is one of the major medical challenges. One of the key obstacles to healthy ageing is immune senescence, including the failure of lymphocytes to respond adequately to infection, malignancy and vaccination. Infectious diseases remain the fourth most common cause of death among the elderly in the developed world. Moreover, the gain of chronic low-grade non-specific inflammation with age contributes to many age-related diseases. Our early work showed that autophagy, the main cellular bulk degradation pathway in the cell, prevents ageing of the immune system. In preclinical models we showed an age-related decline in T cell autophagy. We rejuvenated the immune system by restoring autophagy in T and B cells with the autophagy-inducing metabolite spermidine. Here we are asking for matched funds for a small human clinical trial to confirm that spermidine has the same effect when administered to humans. We will give the nutraceutical spermidine to human volunteers aged >65 years either during or after vaccination against SARS-CoV-2 or influenza to test improvement of vaccine responses, immune senescence and inflamm-aging. We will also confirm whether a novel pathway we discovered that links spermidine to autophagy operates in humans, allowing us to make more specific drugs in the future. This small study of 120 volunteers overall will pave the way for a larger clinical trial with spermidine or novel related drugs.
It is important to evaluate the vaccine-related metabolic changes on FDG PET/CT to avoid confusing results. The investigators aimed to assess the frequency and intensity of regional and systemic metabolic PET/CT changes of patients who received the mRNA-based COVID-19 vaccine (BNT162b2-Pfizer/BioNTech) and to analyze possible factors affecting these changes.
While both heterologous (mixing) and homologous (matching) vaccine regimens are now considered standard of care, post-vaccination complications and long-term effects of the different vaccination regimens have not been thoroughly studied. There is a pressing need to investigate the longitudinal effects of the mixing and matching vaccine-booster approaches. This study proposes to utilize the existing digital infrastructure of the COVID-19 Citizen Science (CCS) study on the Eureka Research Platform to perform a systematic and prospective randomized trial comparing mixing versus matching approaches. Eligible CCS participants will have the opportunity to be randomly assigned to a recommendation of receiving either the Pfizer or Moderna booster vaccine. Long-term effects will be monitored through the participants' completion of their regular weekly CCS follow-up surveys on symptoms and infection. This randomized trial aims to mitigate the effect of confounding variables and provide more conclusive evidence on each regiment to guide booster recommendations.
Background: Scarce information exists in relation to the comparison of seroconversion and adverse events following immunization (AEFI) with different SARS-COV2 vaccines. Our aim was to correlate the magnitude of the antibody response to vaccination with previous clinical conditions and AEFI. Methods: A multicentric comparative study where SARS-CoV-2 spike 1-2 IgG antibodies IgG titers are being measured at baseline, 21-28 days after the first and second dose (when applicable), six months and a year of the following vaccines: BNT162b2 mRNA, mRNA-1273, Gam-COVID-Vac, Coronavac, ChAdOx1-S, Ad5-nCoV and Ad26.COV2. Mixed model and Poisson generalized linear models will be performed for the analyses.
The COSI BAIR trial will involve approximately 60 children, aged 5 to 8 years old, comprising a subset of participants from the Melbourne Infant Study BCG for Allergy and Infection Reduction (MIS BAIR) randomised controlled trial. The overall aim of this trial is to investigate the specific and heterologous effects of COVID-19 vaccination on immunity in children. COSI BAIR will aim to recruit its participants from the MIS BAIR Bacillus Calmette-Guérin (BCG)-naïve group. These children will be followed up until 28 days after their final Coronavirus Disease 2019 (COVID-19) vaccination. Venous blood samples will be collected at two study visits, at Murdoch Children's Research Institute (MCRI): 1. Day 0 - baseline (day of COVID-19 vaccination #1), and 2. Day 84 (28 days after COVID-19 vaccination #2).
The purpose of the study is to evaluate innate and adaptive immunity following QIV-HD vaccination compared to QIV-SD vaccination in people 65 years of age and older.