The CDC views the "shingles" vaccine (Zostavax) as "the Cadillac of vaccines". It can prevent shingles (and therefore herpetic neuropathy and post-herpetic neuralgia) in up to 50% of those vaccinated. It is indicated in those 60 years of age and over who have had chicken pox; there is some discussion about vaccinating those who did not get chicken pox but received the vaccine for chicken pox(Varivax). It MAY be indicated for those under 60 who have some immune deficiency. Medicare now pays for the vaccine, which is good because it costs some $185 or some ridiculous amount.
Why use a vaccine that only works half of the time? Because treatment for shingles and its complications runs into the billions worldwide, and if half of those cases can be prevented, a lot of pain and suffering (not to mention $) will be saved.
If you're uncertain if you've had chicken pox, your doctor can check a titer for you. Now that Medicare pays for it, I don't mind recommending it to my patients, as it has been available for awhile. I just couldn't justify the $ for my patients who would have to miss their rent to pay for the vaccine.
The CDC website has a nice section on Zostavax.
Cool and clear in Idaho,
-Laura