3 Clinical Trials for Various Conditions
The main objective of this study is to see the number of volunteers that get sick from a Norwalk virus (NV) inoculation with typical symptoms of nausea, vomiting, and diarrhea. If this NV preparation is shown to cause Norwalk illness, then it can be used to test new vaccines in the future. Additionally, researchers hope to determine the lowest dose of NV inoculum that can be given to volunteers and cause illness. Study participants will include 57 healthy adults, ages 18-50. Participants will either be given the NV inoculum or placebo (water without virus). Participants will be hospitalized for a maximum of 7 days and a minimum of 4 days following the NV challenge. Study procedures include physical exam, blood testing, and collection of saliva, urine, and stool samples. Participants will be involved in study related procedures for up to 180 days.
The purpose of this study was to evaluate the efficacy of the Norwalk virus-like particle (VLP) vaccine as determined by the illness rate of viral acute gastroenteritis (AGE) during the inpatient stay.
There is a need for safe, highly infectious Norovirus inocula for use in Norovirus vaccine-challenge studies to assess the efficacy of Norovirus vaccines and examine the immune response among vaccinated and unvaccinated subjects. The purpose of this study is to generate the infection and illness rate and immune response data necessary for the conduct of future investigation of Norovirus vaccine studies.