View clinical trials related to Norovirus.
Filter by:This clinical study will evaluate the vaccine candidate rNV-2v, which is under development to prevent disease triggered by noroviruses. Noroviruses are one of the leading causes of gastrointestinal diseases in the world. Norovirus infections can cause vomiting, diarrhea, and cramping. Noroviruses can spread easily, especially in hospitals, schools, military barracks and ships. At the moment, there is no vaccine available to prevent norovirus infections or disease. This clinical trial will look at the safety and tolerability of an investigational vaccine that is being developed to prevent norovirus-related disease. The trial will also look at whether the immune system produces a response to the investigational study vaccine. The study vaccine is a combination of two different types of norovirus antigens. In contrast to similar vaccines under development, the vaccine studied here adds no substances (adjuvants) to increase or modulate the immune response. The study vaccine is produced using a plant-based system rather than a typically used animal cell system. This is the first time the study vaccine will be given to humans. Two different doses of the investigational study vaccine will be tested in this trial. Either the investigational study vaccine or the placebo will be given as 2 injections. These injections will be given about 1 month apart. The trial will last about 12 months, from the time of enrollment.
The purpose of this study is to evaluate descriptively the long-term immunogenicity of at least 1 NoV vaccine administration.
The purpose of this study is to further develop a formulation and dose regimen of the norovirus GI.1/GII.4 bivalent virus-like particle (VLP) vaccine that is immunogenic and safe in an elderly population aged 60 years and above.
The purpose of this study is to collect serum samples to evaluate serologic assays and to establish proficiency panels for serologic assays used for assessment of post vaccination immune response after intramuscular (IM) vaccination with Norovirus GI.1/GII.4 bivalent virus-like particle (VLP) vaccine.
The purpose of this study is to select the optimal formulation of the norovirus vaccine from different concentrations of virus-like particles (VLP) combined with aluminum hydroxide for further development in children.
Randomized, double blind, multi-site, study in healthy adults, comparing safety and immunogenicity of two dosage levels of Norwalk VLP Vaccine with adjuvant/excipients and with placebo controls Primary Objective: - Safety as determined by occurrence of local intranasal symptoms or other symptoms as reported by a self-administered memory aid for 7 days after each vaccination and hematology, blood chemistry and physical examinations performed by the clinical research staff - Subjects will also be monitored for Serious Adverse Events (SAEs), and onset of any new medical conditions for 180 days following the last study vaccinations (Day 201). Secondary Objectives Evaluations of immunogenicity as determined by: - Geometric mean titers and seroconversion rate of serum anti- Norwalk VLP IgG and IgA - Stimulation of anti-Norwalk VLP IgA antibody secreting cells (ASC) - Presence of antigen specific memory B-cell response Cells will be collected and stored for possible future evaluation of Norwalk VLP-specific cell-mediated immune (CMI) responses Study Hypothesis: The incidence of adverse events after intranasal Norwalk VLP Vaccine will be the same as the incidence of adverse events after intranasal adjuvant/excipients alone. Norwalk VLP Vaccine and adjuvant/excipients will have a higher incidence of mild to moderate nasal adverse events compared to placebo but similar incidence of other adverse events. Two doses of the 100 µg of Norwalk VLP Vaccine will be more immunogenic than two doses of 50 µg of Norwalk VLP Vaccine. The post-vaccination serum antibody responses, the number of antibody secreting cells (ASC) and IgG and IgA memory B-cell responses directed against Norwalk Virus antigen will be increased after Norwalk VLP Vaccine compared to adjuvant/excipients and to placebo.