Herpes Zoster Clinical Trial
Official title:
A Phase III, Double-Blind, Randomized, Placebo-Controlled, Multicenter Clinical Trial to Study the Safety, Tolerability, Efficacy, and Immunogenicity of V212 in Recipients of Autologous Hematopoietic Cell Transplants (HCTs)
This is a randomized, double-blind, placebo-controlled study to assess the safety and efficacy of inactivated VZV vaccine for the prevention of HZ and HZ-related complications in adult recipients of autologous hematopoietic cell transplants (HCTs). The primary hypothesis is that vaccination with V212 vaccine will reduce the incidence of herpes zoster (HZ) compared to placebo when administered to recipients of HCT. The statistical criterion for success requires that the lower bound of the 95% confidence interval for the estimated vaccine efficacy in the V212 recipients (excluding the high-antigen lot) compared with that in the placebo recipients is >25%.
Study participants were randomized to receive one of 3 consistency lots of V212, a high antigen lot of V212, or placebo. To comply with regulatory requests, results for all lots of V212 were combined for the primary and secondary efficacy and safety evaluations (Protocol Amendment 2); all planned comparisons between the V212 lots were exploratory and are not included in this disclosure. Further, by regulatory request, the V212 High Antigen Lot was not included in the efficacy analyses for concerns that its inclusion would inflate the efficacy estimates (Protocol Amendment 4). ;
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