The ad above the page, gives information on shingles, here's the link for those who don't see the ad.
Shingles Picture Slideshow: A Collection of Photos
It says:
In 2006, the FDA approved the first vaccine to prevent shingles in adults. Recommended for adults over 60 who’ve already had chickenpox, the vaccine, Zostavax, contains a booster of the chickenpox vaccine usually given to children.
The vaccine is over 50% effective in preventing shingles, and reduces the incidence of postherpetic neuralgia by at least two-thirds. Studies continue to evaluate the vaccine’s long-term effectiveness.