At a glance
ClinicalIndex Comparison RecordStandardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.
A Double-Blind, Randomized, Placebo Controlled, Parallel Group Study to Evaluate Biomarkers of Immunity to Varicella Zoster Virus Following Immunization With V212/Heat-Treated Varicella-Zoster Virus (VZV) Vaccine or With ZOSTAVAX in Healthy Volunteers
In Brief
A Phase 1 clinical trial evaluating V212, Comparator: Zostavax™, and 3 other interventions for Herpes Zoster. Completed, enrolled 120 participants.
Detailed Summary
A study in two parts (Part A and Part B) to evaluate the responsiveness of various biomarkers of immunity to Varicella-Zoster Virus (VZV) following repeated immunizations with heat treated VZV vaccine V212 or with Zostavax™. The enrollment of participants into this study was conducted in 2 parts, Part A and Part B. The first 42 eligible participants were enrolled into Part A of the study. In Part A, the reaction of the VZV skin test at baseline was evaluated at both 48 and 72 hours post administration of the VZV skin test reagent and saline (in opposite arms), with 2 examiners performing the reading at each timepoint; all subsequent skin test readings in Part A were performed at 48 hours post administration. After all skin test reactions were obtained at baseline for the 42 subjects in Part A, an interim analysis was performed (1) to assess the frequency of baseline negative skin tests in order to confirm that the planned sample size (N=120) was adequate for an evaluation of the effect of vaccination on the VZV Skin Test, and (2) to assess the frequency of baseline positive skin tests at 72 hours relative to 48 hours (post administration) in order to determine the preferred time for evaluation of the skin test reaction. The interim analysis from Part A confirmed the study sample size, an additional 78 subjects were enrolled into Part B to achieve the planned sample size (N=120). The study procedures for Part B of the study were identical to those in Part A with the following exceptions: (1) baseline skin test readings were performed only once, at either 48 or 72 hours (post administration) to accommodate the scheduling of clinic visits, and (2) only one examiner was needed for the skin test reading at baseline.
Study Details
Timeline
Interventions
Two doses of 0.65 mL V212 subcutaneous injection administered at Day 1 and Day 31
Two doses of 0.65 mL Zostavax™ subcutaneous injection administered at Day 1 and Day 31
Two doses of 0.65 mL subcutaneous injection of placebo administered at Day 1 and Day 31
Three intradermal injections of the 0.1 ml varicella antigen (VZV Skin Test reagent) were administered, once at baseline before the first vaccination, a second time before the second vaccination, and a third time approximately 14 days after the second vaccination.
One intradermal injection of the 0.1 ml saline was administered at the time of the baseline VZV skin test prior to the first vaccination. Saline and VZV skin test reagents were administered on opposite arms.