vaccination against zoster

[Yoichiro Kino]

I understand that several attempts were made to immunize the elderly with
live varicella 
vaccine.  Although  augmentation of immunities was noted by the vaccination
in those studies, 
clinical efficacy of the vaccination against zoster has been unclear.  Dose
anyone know a paper 
reporting clinical efficacy of varicella vaccine against zoster in the elderly?
Yoichiro Kino, Ph.D.
The Chemo-Sero-Therapeutic Research Institute