The purpose of this study &#151; to determine if the vaccine can prevent shingles &#151; requires testing in a large number of people.
(The purpose of this study &#151; to determine if the vaccine can prevent shingles &#151;; requires; testing in a large number of people)
The purpose of this study &#151
to determine if the vaccine can prevent shingles &#151;
requires testing in a large number of people