View clinical trials related to Vaccine Adverse Reaction.
Filter by:This trial has two parts. Part A and Part B. Due to changes in the overall clinical development plan, Part B will no longer be conducted. The objectives originally described for Part B have been implemented in the ongoing development via a pivotal Phase I/II/III trial BNT162-02/C4591001 (ClinicalTrials.gov NCT: 04368728). Part A is for dose ranging of four different vaccines (BNT162a1, BNT162b1, BNT162b2, and BNT162c2) which will be undertaken with dose escalation and de-escalation plus the evaluation of interim dose levels. It also includes dose ranging in older participants. The vaccines BNT162a1, BNT162b1, BNT162b2, and BNT162c2 will be administered using a Prime/Boost (P/B) regimen. The vaccine BNT162c2 will also be administered using a Single dose (SD) regimen. Three additional cohorts aged from 18 to 85 years receiving BNT162b2 only. BNT162b2 has entered a Phase II/III evaluation of efficacy, with the intent to support an application for marketing authorization. The dosing regimen under investigation is two BNT162b2 doses given ~21 d apart.
Vaccination is estimated to have saved more lives in Canada than any other single intervention and is considered one of the most important advances in the prevention of disease. The process of vaccination, however, is stressful for individuals. School-based vaccinations in particular, are associated with high levels of fear and anxiety among students. This randomized cluster trial will implement a multi-faceted knowledge translation intervention called The CARD (C-Comfort A-Ask R-Relax D-Distract) System in school-based vaccinations and evaluate its effects on the experience of vaccination for students and implementation outcomes.
Vaccination hesitancy is identified as a threat to global health by the World Health Organization (WHO). For adolescents undergoing vaccination at school, prior studies demonstrate that concerns about pain and/or fear of needles contribute to negative experiences with vaccination and non-compliance with vaccination. The investigators developed an intervention that addresses vaccination hesitancy. In this study, investigators will evaluate the effectiveness of this intervention in a randomized controlled trial.
This is a single center phase I, double-blind placebo-controlled study to assess reactogenicity, safety and immunogenicity of a live monovalent A/17/Hong Kong/2017/75108 (H7N9) influenza vaccine in healthy male and female adults, 18 through 49 years of age.
This is a prospective randomized, open label clinical trial in approximately 300 children aged 5-11 years with a physician diagnosis of persistent asthma. Participants will be randomized 1:1 to receive either a single intranasal dose of licensed quadrivalent LAIV (LAIV4) or an intramuscular injection of quadrivalent IIV4 (IIV4).
Background: Investigators at Bandim Health Project (BHP, www.bandim.org) in Guinea-Bissau have shown in several randomized trials that the Bacille-Calmette-Guérin (BCG) vaccine against tuberculosis (TB) is associated with reduced mortality in the first months of life. BCG is a live attenuated vaccine, which means that it consists of active tuberculosis bacteria that are not capable of infecting a human with TB. BCG has been grown and maintained at many different laboratories all over the world using slightly different laboratory techniques. Due to the accumulation of genetic mutations in the different BCG strains, many variants of the vaccine exists today. These have different properties when it comes to immune response, side effects, protection against TB and scar formation. The BCG scar status after vaccination is a good marker for the non-specific effects of the vaccine; among BCG-vaccinated infants, those with a BCG scar have improved survival. The investigators hypothesize that the different types of BCG vary in terms of the strength of the non-specific effects and thus the impact on overall morbidity and mortality. In the trial, the investigators will compare the two most widely used BCG strains in the world, BCG-Russia and BCG-Japan, with respect to their non-specific effects on morbidity and mortality. As an addition, the investigators will study the effect of maternal BCG vaccination on the subsequent effect of BCG-vaccination in the offspring, since there are indications that the maternal BCG scar status primes for a stronger non-specific response in the offspring.