What are Shingles?

No. In fact, the only thing that you can get shingles from is your own body. The herpes zoster virus which causes shingles is actually the same virus that causes chickenpox. After a person recovers...

no- you get shingles from your own chicken pox virus. However, a person who has not had chicken pox can get chicken pox from a person with shingles.

yes

It is possible for the outbreak to occur more than once; but only about 5% will have additional outbreaks.

You could get the vaccine if you already had shingles; but it may not help you from recurrence of zoster, which by the way is less than 5%. If it does recur, the vaccine may help you.